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Espruino/libs/graphics/jswrap_graphics.c
Gordon Williams 9f061dfe11 optional 12 bit gfx mode
2020-10-29 14:51:21 +00:00

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/*
* This file is part of Espruino, a JavaScript interpreter for Microcontrollers
*
* Copyright (C) 2013 Gordon Williams <gw@pur3.co.uk>
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* ----------------------------------------------------------------------------
* This file is designed to be parsed during the build process
*
* Contains JavaScript Graphics Draw Functions
* ----------------------------------------------------------------------------
*/
#include "jswrap_graphics.h"
#include "jsutils.h"
#include "jsinteractive.h"
#include "lcd_arraybuffer.h"
#include "lcd_js.h"
#ifdef USE_LCD_SDL
#include "lcd_sdl.h"
#endif
#ifdef USE_LCD_FSMC
#include "lcd_fsmc.h"
#endif
#ifdef USE_LCD_ST7789_8BIT
#include "lcd_st7789_8bit.h"
#endif
#include "jswrap_functions.h" // for asURL
#include "bitmap_font_4x6.h"
#include "bitmap_font_6x8.h"
#include "vector_font.h"
#ifdef GRAPHICS_PALETTED_IMAGES
#ifdef ESPR_GRAPHICS_12BIT
#define PALETTE_BPP 12
// 16 color 12 bit Web-safe palette
const uint16_t PALETTE_4BIT[16] = { 0x0,0x444,0x888,0xbbb,0x963,0x630,0x60,0xa0,0x9f,0xc,0x309,0xf09,0xd00,0xf60,0xff0,0xfff };
// 256 color 12 bit Web-safe palette
const uint16_t PALETTE_8BIT[256] = { 0x0,0x3,0x6,0x9,0xc,0xf,0x30,0x33,0x36,0x39,0x3c,0x3f,0x60,0x63,0x66,0x69,0x6c,0x6f,0x90,0x93,0x96,0x99,0x9c,0x9f,0xc0,0xc3,0xc6,0xc9,0xcc,0xcf,0xf0,0xf3,0xf6,0xf9,0xfc,0xff,0x300,0x303,0x306,0x309,0x30c,0x30f,0x330,0x333,0x336,0x339,0x33c,0x33f,0x360,0x363,0x366,0x369,0x36c,0x36f,0x390,0x393,0x396,0x399,0x39c,0x39f,0x3c0,0x3c3,0x3c6,0x3c9,0x3cc,0x3cf,0x3f0,0x3f3,0x3f6,0x3f9,0x3fc,0x3ff,0x600,0x603,0x606,0x609,0x60c,0x60f,0x630,0x633,0x636,0x639,0x63c,0x63f,0x660,0x663,0x666,0x669,0x66c,0x66f,0x690,0x693,0x696,0x699,0x69c,0x69f,0x6c0,0x6c3,0x6c6,0x6c9,0x6cc,0x6cf,0x6f0,0x6f3,0x6f6,0x6f9,0x6fc,0x6ff,0x900,0x903,0x906,0x909,0x90c,0x90f,0x930,0x933,0x936,0x939,0x93c,0x93f,0x960,0x963,0x966,0x969,0x96c,0x96f,0x990,0x993,0x996,0x999,0x99c,0x99f,0x9c0,0x9c3,0x9c6,0x9c9,0x9cc,0x9cf,0x9f0,0x9f3,0x9f6,0x9f9,0x9fc,0x9ff,0xc00,0xc03,0xc06,0xc09,0xc0c,0xc0f,0xc30,0xc33,0xc36,0xc39,0xc3c,0xc3f,0xc60,0xc63,0xc66,0xc69,0xc6c,0xc6f,0xc90,0xc93,0xc96,0xc99,0xc9c,0xc9f,0xcc0,0xcc3,0xcc6,0xcc9,0xccc,0xccf,0xcf0,0xcf3,0xcf6,0xcf9,0xcfc,0xcff,0xf00,0xf03,0xf06,0xf09,0xf0c,0xf0f,0xf30,0xf33,0xf36,0xf39,0xf3c,0xf3f,0xf60,0xf63,0xf66,0xf69,0xf6c,0xf6f,0xf90,0xf93,0xf96,0xf99,0xf9c,0xf9f,0xfc0,0xfc3,0xfc6,0xfc9,0xfcc,0xfcf,0xff0,0xff3,0xff6,0xff9,0xffc,0xfff,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0xfff };
#else // default to 16 bit
#define PALETTE_BPP 16
// 16 color MAC OS palette
const uint16_t PALETTE_4BIT[16] = { 0x0,0x4228,0x8c51,0xbdd7,0x9b26,0x6180,0x320,0x540,0x4df,0x19,0x3013,0xf813,0xd800,0xfb20,0xffe0,0xffff };
// 256 color 16 bit Web-safe palette
const uint16_t PALETTE_8BIT[256] = {
0x0,0x6,0xc,0x13,0x19,0x1f,0x180,0x186,0x18c,0x193,0x199,0x19f,0x320,0x326,0x32c,0x333,0x339,0x33f,0x4c0,
0x4c6,0x4cc,0x4d3,0x4d9,0x4df,0x660,0x666,0x66c,0x673,0x679,0x67f,0x7e0,0x7e6,0x7ec,0x7f3,0x7f9,0x7ff,
0x3000,0x3006,0x300c,0x3013,0x3019,0x301f,0x3180,0x3186,0x318c,0x3193,0x3199,0x319f,0x3320,0x3326,0x332c,
0x3333,0x3339,0x333f,0x34c0,0x34c6,0x34cc,0x34d3,0x34d9,0x34df,0x3660,0x3666,0x366c,0x3673,0x3679,0x367f,
0x37e0,0x37e6,0x37ec,0x37f3,0x37f9,0x37ff,0x6000,0x6006,0x600c,0x6013,0x6019,0x601f,0x6180,0x6186,0x618c,
0x6193,0x6199,0x619f,0x6320,0x6326,0x632c,0x6333,0x6339,0x633f,0x64c0,0x64c6,0x64cc,0x64d3,0x64d9,0x64df,
0x6660,0x6666,0x666c,0x6673,0x6679,0x667f,0x67e0,0x67e6,0x67ec,0x67f3,0x67f9,0x67ff,0x9800,0x9806,0x980c,
0x9813,0x9819,0x981f,0x9980,0x9986,0x998c,0x9993,0x9999,0x999f,0x9b20,0x9b26,0x9b2c,0x9b33,0x9b39,0x9b3f,
0x9cc0,0x9cc6,0x9ccc,0x9cd3,0x9cd9,0x9cdf,0x9e60,0x9e66,0x9e6c,0x9e73,0x9e79,0x9e7f,0x9fe0,0x9fe6,0x9fec,
0x9ff3,0x9ff9,0x9fff,0xc800,0xc806,0xc80c,0xc813,0xc819,0xc81f,0xc980,0xc986,0xc98c,0xc993,0xc999,0xc99f,
0xcb20,0xcb26,0xcb2c,0xcb33,0xcb39,0xcb3f,0xccc0,0xccc6,0xcccc,0xccd3,0xccd9,0xccdf,0xce60,0xce66,0xce6c,
0xce73,0xce79,0xce7f,0xcfe0,0xcfe6,0xcfec,0xcff3,0xcff9,0xcfff,0xf800,0xf806,0xf80c,0xf813,0xf819,0xf81f,
0xf980,0xf986,0xf98c,0xf993,0xf999,0xf99f,0xfb20,0xfb26,0xfb2c,0xfb33,0xfb39,0xfb3f,0xfcc0,0xfcc6,0xfccc,
0xfcd3,0xfcd9,0xfcdf,0xfe60,0xfe66,0xfe6c,0xfe73,0xfe79,0xfe7f,0xffe0,0xffe6,0xffec,0xfff3,0xfff9,0xffff,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0xffff
};
#endif
// map Mac to web-safe palette. Must be uint16_t because drawImage uses uint16_t* for palette
const uint16_t PALETTE_4BIT_TO_8BIT[16] = { 0, 43, 129, 172, 121, 78, 12, 18, 23, 4, 39, 183, 144, 192, 210, 215 };
#endif
/*JSON{
"type" : "class",
"class" : "Graphics"
}
This class provides Graphics operations that can be applied to a surface.
Use Graphics.createXXX to create a graphics object that renders in the way you want. See [the Graphics page](https://www.espruino.com/Graphics) for more information.
**Note:** On boards that contain an LCD, there is a built-in 'LCD' object of type Graphics. For instance to draw a line you'd type: ```LCD.drawLine(0,0,100,100)```
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"params" : [ ["all","bool","(only on some devices) If `true` then copy all pixels, not just those that have changed."] ],
"name" : "flip"
}
On instances of graphics that drive a display with
an offscreen buffer, calling this function will
copy the contents of the offscreen buffer to the
screen.
Call this when you have drawn something to Graphics
and you want it shown on the screen.
If a display does not have an offscreen buffer,
it may not have a `g.flip()` method.
On Bangle.js, there are different graphics modes
chosen with `Bangle.setLCDMode()`. The default mode
is unbuffered and in this mode `g.flip()` does not
affect the screen contents, however it will cause the
screen to light up if it was previously off due
to inactivity.
On some devices, this command will attempt to
only update the areas of the screen that have
changed in order to increase speed. If you have
accessed the `Graphics.buffer` directly then you
may need to use `Graphics.flip(true)` to force
a full update of the screen.
*/
/*JSON{
"type" : "property",
"class" : "Graphics",
"name" : "buffer"
}
On Graphics instances with an offscreen buffer, this
is an `ArrayBuffer` that provides access to the underlying
pixel data.
```
g=Graphics.createArrayBuffer(8,8,8)
g.drawLine(0,0,7,7)
print(new Uint8Array(g.buffer))
new Uint8Array([
255, 0, 0, 0, 0, 0, 0, 0,
0, 255, 0, 0, 0, 0, 0, 0,
0, 0, 255, 0, 0, 0, 0, 0,
0, 0, 0, 255, 0, 0, 0, 0,
0, 0, 0, 0, 255, 0, 0, 0,
0, 0, 0, 0, 0, 255, 0, 0,
0, 0, 0, 0, 0, 0, 255, 0,
0, 0, 0, 0, 0, 0, 0, 255])
```
*/
/*JSON{
"type" : "idle",
"generate" : "jswrap_graphics_idle"
}*/
bool jswrap_graphics_idle() {
graphicsIdle();
return false;
}
/*JSON{
"type" : "init",
"generate" : "jswrap_graphics_init"
}*/
void jswrap_graphics_init() {
#ifdef USE_LCD_FSMC
JsVar *parent = jspNewObject("LCD", "Graphics");
if (parent) {
JsVar *parentObj = jsvSkipName(parent);
jsvObjectSetChild(execInfo.hiddenRoot, JS_GRAPHICS_VAR, parentObj);
JsGraphics gfx;
graphicsStructInit(&gfx,320,240,16);
gfx.data.type = JSGRAPHICSTYPE_FSMC;
gfx.graphicsVar = parentObj;
lcdInit_FSMC(&gfx);
lcdSetCallbacks_FSMC(&gfx);
graphicsSplash(&gfx);
graphicsSetVar(&gfx);
jsvUnLock2(parentObj, parent);
}
#endif
}
/*JSON{
"type" : "staticmethod",
"class" : "Graphics",
"name" : "getInstance",
"generate" : "jswrap_graphics_getInstance",
"return" : ["JsVar","An instance of `Graphics` or undefined"]
}
On devices like Pixl.js or HYSTM boards that contain a built-in display
this will return an instance of the graphics class that can be used to
access that display.
Internally, this is stored as a member called `gfx` inside the 'hiddenRoot'.
*/
JsVar *jswrap_graphics_getInstance() {
return jsvObjectGetChild(execInfo.hiddenRoot, JS_GRAPHICS_VAR, 0);
}
static bool isValidBPP(int bpp) {
return bpp==1 || bpp==2 || bpp==4 || bpp==8 || bpp==16 || bpp==24 || bpp==32; // currently one colour can't ever be spread across multiple bytes
}
/*JSON{
"type" : "staticmethod",
"class" : "Graphics",
"name" : "createArrayBuffer",
"generate" : "jswrap_graphics_createArrayBuffer",
"params" : [
["width","int32","Pixels wide"],
["height","int32","Pixels high"],
["bpp","int32","Number of bits per pixel"],
["options","JsVar",[
"An object of other options. `{ zigzag : true/false(default), vertical_byte : true/false(default), msb : true/false(default), color_order: 'rgb'(default),'bgr',etc }`",
"`zigzag` = whether to alternate the direction of scanlines for rows",
"`vertical_byte` = whether to align bits in a byte vertically or not",
"`msb` = when bits<8, store pixels most significant bit first, when bits>8, store most significant byte first",
"`interleavex` = Pixels 0,2,4,etc are from the top half of the image, 1,3,5,etc from the bottom half. Used for P3 LED panels.",
"`color_order` = re-orders the colour values that are supplied via setColor"
]]
],
"return" : ["JsVar","The new Graphics object"],
"return_object" : "Graphics"
}
Create a Graphics object that renders to an Array Buffer. This will have a field called 'buffer' that can get used to get at the buffer itself
*/
JsVar *jswrap_graphics_createArrayBuffer(int width, int height, int bpp, JsVar *options) {
if (width<=0 || height<=0 || width>32767 || height>32767) {
jsExceptionHere(JSET_ERROR, "Invalid Size");
return 0;
}
if (!isValidBPP(bpp)) {
jsExceptionHere(JSET_ERROR, "Invalid BPP");
return 0;
}
JsVar *parent = jspNewObject(0, "Graphics");
if (!parent) return 0; // low memory
JsGraphics gfx;
graphicsStructInit(&gfx,width,height,bpp);
gfx.data.type = JSGRAPHICSTYPE_ARRAYBUFFER;
gfx.data.flags = JSGRAPHICSFLAGS_NONE;
gfx.graphicsVar = parent;
if (jsvIsObject(options)) {
if (jsvGetBoolAndUnLock(jsvObjectGetChild(options, "zigzag", 0)))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_ARRAYBUFFER_ZIGZAG);
if (jsvGetBoolAndUnLock(jsvObjectGetChild(options, "msb", 0)))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_ARRAYBUFFER_MSB);
if (jsvGetBoolAndUnLock(jsvObjectGetChild(options, "interleavex", 0)))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_ARRAYBUFFER_INTERLEAVEX);
if (jsvGetBoolAndUnLock(jsvObjectGetChild(options, "vertical_byte", 0))) {
if (gfx.data.bpp==1)
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_ARRAYBUFFER_VERTICAL_BYTE);
else {
jsExceptionHere(JSET_ERROR, "vertical_byte only works for 1bpp ArrayBuffers\n");
return 0;
}
if (gfx.data.height&7) {
jsExceptionHere(JSET_ERROR, "height must be a multiple of 8 when using vertical_byte\n");
return 0;
}
}
JsVar *colorv = jsvObjectGetChild(options, "color_order", 0);
if (colorv) {
if (jsvIsStringEqual(colorv, "rgb")) ; // The default
else if (!jsvIsStringEqual(colorv, "brg"))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_COLOR_BRG);
else if (!jsvIsStringEqual(colorv, "bgr"))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_COLOR_BGR);
else if (!jsvIsStringEqual(colorv, "gbr"))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_COLOR_GBR);
else if (!jsvIsStringEqual(colorv, "grb"))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_COLOR_GRB);
else if (!jsvIsStringEqual(colorv, "rbg"))
gfx.data.flags = (JsGraphicsFlags)(gfx.data.flags | JSGRAPHICSFLAGS_COLOR_RBG);
else
jsWarn("color_order must be 3 characters");
jsvUnLock(colorv);
}
}
lcdInit_ArrayBuffer(&gfx);
graphicsSetVar(&gfx);
return parent;
}
/*JSON{
"type" : "staticmethod",
"class" : "Graphics",
"name" : "createCallback",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_createCallback",
"params" : [
["width","int32","Pixels wide"],
["height","int32","Pixels high"],
["bpp","int32","Number of bits per pixel"],
["callback","JsVar","A function of the form ```function(x,y,col)``` that is called whenever a pixel needs to be drawn, or an object with: ```{setPixel:function(x,y,col),fillRect:function(x1,y1,x2,y2,col)}```. All arguments are already bounds checked."]
],
"return" : ["JsVar","The new Graphics object"],
"return_object" : "Graphics"
}
Create a Graphics object that renders by calling a JavaScript callback function to draw pixels
*/
JsVar *jswrap_graphics_createCallback(int width, int height, int bpp, JsVar *callback) {
if (width<=0 || height<=0 || width>32767 || height>32767) {
jsExceptionHere(JSET_ERROR, "Invalid Size");
return 0;
}
if (!isValidBPP(bpp)) {
jsExceptionHere(JSET_ERROR, "Invalid BPP");
return 0;
}
JsVar *callbackSetPixel = 0;
JsVar *callbackFillRect = 0;
if (jsvIsObject(callback)) {
jsvUnLock(callbackSetPixel);
callbackSetPixel = jsvObjectGetChild(callback, "setPixel", 0);
callbackFillRect = jsvObjectGetChild(callback, "fillRect", 0);
} else
callbackSetPixel = jsvLockAgain(callback);
if (!jsvIsFunction(callbackSetPixel)) {
jsExceptionHere(JSET_ERROR, "Expecting Callback Function or an Object but got %t", callbackSetPixel);
jsvUnLock2(callbackSetPixel, callbackFillRect);
return 0;
}
if (!jsvIsUndefined(callbackFillRect) && !jsvIsFunction(callbackFillRect)) {
jsExceptionHere(JSET_ERROR, "Expecting Callback Function or an Object but got %t", callbackFillRect);
jsvUnLock2(callbackSetPixel, callbackFillRect);
return 0;
}
JsVar *parent = jspNewObject(0, "Graphics");
if (!parent) return 0; // low memory
JsGraphics gfx;
graphicsStructInit(&gfx,width,height,bpp);
gfx.data.type = JSGRAPHICSTYPE_JS;
gfx.graphicsVar = parent;
lcdInit_JS(&gfx, callbackSetPixel, callbackFillRect);
graphicsSetVar(&gfx);
jsvUnLock2(callbackSetPixel, callbackFillRect);
return parent;
}
#ifdef USE_LCD_SDL
/*JSON{
"type" : "staticmethod",
"class" : "Graphics",
"name" : "createSDL",
"ifdef" : "USE_LCD_SDL",
"generate" : "jswrap_graphics_createSDL",
"params" : [
["width","int32","Pixels wide"],
["height","int32","Pixels high"],
["bpp","int32","Bits per pixel (8,16,24 or 32 supported)"]
],
"return" : ["JsVar","The new Graphics object"],
"return_object" : "Graphics"
}
Create a Graphics object that renders to SDL window (Linux-based devices only)
*/
JsVar *jswrap_graphics_createSDL(int width, int height, int bpp) {
if (width<=0 || height<=0 || width>32767 || height>32767) {
jsExceptionHere(JSET_ERROR, "Invalid Size");
return 0;
}
JsVar *parent = jspNewObject(0, "Graphics");
if (!parent) return 0; // low memory
JsGraphics gfx;
graphicsStructInit(&gfx,width,height,bpp);
gfx.data.type = JSGRAPHICSTYPE_SDL;
gfx.graphicsVar = parent;
lcdInit_SDL(&gfx);
graphicsSetVar(&gfx);
return parent;
}
#endif
/*JSON{
"type" : "staticmethod",
"class" : "Graphics",
"name" : "createImage",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_createImage",
"params" : [
["str","JsVar","A String containing a newline-separated image - space is 0, anything else is 1"]
],
"return" : ["JsVar","An Image object that can be used with `Graphics.drawImage`"]
}
Create a simple Black and White image for use with `Graphics.drawImage`.
Use as follows:
```
var img = Graphics.createImage(`
XXXXXXXXX
X X
X X X
X X X
X X
XXXXXXXXX
`);
g.drawImage(img, x,y);
```
If the characters at the beginning and end of the string are newlines, they
will be ignored. Spaces are treated as `0`, and any other character is a `1`
*/
JsVar *jswrap_graphics_createImage(JsVar *data) {
if (!jsvIsString(data)) {
jsExceptionHere(JSET_TYPEERROR, "Expecting a String");
return 0;
}
int x=0,y=0;
int width=0, height=0;
size_t startCharacter = 0;
JsvStringIterator it;
// First iterate and work out width and height
jsvStringIteratorNew(&it,data,0);
while (jsvStringIteratorHasChar(&it)) {
char ch = jsvStringIteratorGetCharAndNext(&it);
if (ch=='\n') {
if (x==0 && y==0) startCharacter = 1; // ignore first character
x=0;
y++;
} else {
if (y>=height) height=y+1;
x++;
if (x>width) width=x;
}
}
jsvStringIteratorFree(&it);
// Sorted - now create the object, set it up and create the buffer
JsVar *img = jsvNewObject();
if (!img) return 0;
jsvObjectSetChildAndUnLock(img,"width",jsvNewFromInteger(width));
jsvObjectSetChildAndUnLock(img,"height",jsvNewFromInteger(height));
// bpp is 1, no need to set it
int len = (width*height+7)>>3;
JsVar *buffer = jsvNewStringOfLength((unsigned)len, NULL);
if (!buffer) { // not enough memory
jsvUnLock(img);
return 0;
}
// Now set the characters!
x=0;
y=0;
jsvStringIteratorNew(&it,data,startCharacter);
while (jsvStringIteratorHasChar(&it)) {
char ch = jsvStringIteratorGetCharAndNext(&it);
if (ch=='\n') {
x=0;
y++;
} else {
if (ch!=' ') {
/* a pixel to set. This'll be slowish for non-flat strings,
* but this is here for relatively small bitmaps
* anyway so it's not a big deal */
size_t idx = (size_t)(y*width + x);
jsvSetCharInString(buffer, idx>>3, (char)(128>>(idx&7)), true/*OR*/);
}
x++;
}
}
jsvStringIteratorFree(&it);
jsvObjectSetChildAndUnLock(img, "buffer", buffer);
return img;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getWidth",
"generate_full" : "jswrap_graphics_getWidthOrHeight(parent, false)",
"return" : ["int","The width of the LCD"]
}
The width of the LCD
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getHeight",
"generate_full" : "jswrap_graphics_getWidthOrHeight(parent, true)",
"return" : ["int","The height of the LCD"]
}
The height of the LCD
*/
int jswrap_graphics_getWidthOrHeight(JsVar *parent, bool height) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
return height ? graphicsGetHeight(&gfx) : graphicsGetWidth(&gfx);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "reset",
"generate" : "jswrap_graphics_reset",
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Reset the state of Graphics to the defaults (eg. Color, Font, etc)
that would have been used when Graphics was initialised.
*/
JsVar *jswrap_graphics_reset(JsVar *parent) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
// properly reset state
graphicsStructResetState(&gfx);
graphicsSetVar(&gfx); // gfx data changed because modified area
// reset font, which will unreference any custom fonts stored inside the instance
return jswrap_graphics_setFontSizeX(parent, 1+JSGRAPHICS_FONTSIZE_4X6, false);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "clear",
"generate" : "jswrap_graphics_clear",
"params" : [
["reset","bool","If `true`, resets the state of Graphics to the default (eg. Color, Font, etc) as if calling `Graphics.reset`"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Clear the LCD with the Background Color
*/
JsVar *jswrap_graphics_clear(JsVar *parent, bool resetState) {
if (resetState) jsvUnLock(jswrap_graphics_reset(parent));
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsClear(&gfx);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "fillRect",
"generate" : "jswrap_graphics_fillRect",
"params" : [
["x1","int32","The left X coordinate"],
["y1","int32","The top Y coordinate"],
["x2","int32","The right X coordinate"],
["y2","int32","The bottom Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Fill a rectangular area in the Foreground Color
*/
JsVar *jswrap_graphics_fillRect(JsVar *parent, int x1, int y1, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsFillRect(&gfx, x1,y1,x2,y2,gfx.data.fgColor);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "clearRect",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_clearRect",
"params" : [
["x1","int32","The left X coordinate"],
["y1","int32","The top Y coordinate"],
["x2","int32","The right X coordinate"],
["y2","int32","The bottom Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Fill a rectangular area in the Background Color
*/
JsVar *jswrap_graphics_clearRect(JsVar *parent, int x1, int y1, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsFillRect(&gfx, x1,y1,x2,y2,gfx.data.bgColor);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawRect",
"generate" : "jswrap_graphics_drawRect",
"params" : [
["x1","int32","The left X coordinate"],
["y1","int32","The top Y coordinate"],
["x2","int32","The right X coordinate"],
["y2","int32","The bottom Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw an unfilled rectangle 1px wide in the Foreground Color
*/
JsVar *jswrap_graphics_drawRect(JsVar *parent, int x1, int y1, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsDrawRect(&gfx, x1,y1,x2,y2);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "fillCircle",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_fillCircle",
"params" : [
["x","int32","The X axis"],
["y","int32","The Y axis"],
["rad","int32","The circle radius"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a filled circle in the Foreground Color
*/
JsVar *jswrap_graphics_fillCircle(JsVar *parent, int x, int y, int rad) {
return jswrap_graphics_fillEllipse(parent, x-rad, y-rad, x+rad, y+rad);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawCircle",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_drawCircle",
"params" : [
["x","int32","The X axis"],
["y","int32","The Y axis"],
["rad","int32","The circle radius"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw an unfilled circle 1px wide in the Foreground Color
*/
JsVar *jswrap_graphics_drawCircle(JsVar *parent, int x, int y, int rad) {
return jswrap_graphics_drawEllipse(parent, x-rad, y-rad, x+rad, y+rad);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "fillEllipse",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_fillEllipse",
"params" : [
["x1","int32","The left X coordinate"],
["y1","int32","The top Y coordinate"],
["x2","int32","The right X coordinate"],
["y2","int32","The bottom Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a filled ellipse in the Foreground Color
*/
JsVar *jswrap_graphics_fillEllipse(JsVar *parent, int x, int y, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsFillEllipse(&gfx, x,y,x2,y2);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawEllipse",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_drawEllipse",
"params" : [
["x1","int32","The left X coordinate"],
["y1","int32","The top Y coordinate"],
["x2","int32","The right X coordinate"],
["y2","int32","The bottom Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw an ellipse in the Foreground Color
*/
JsVar *jswrap_graphics_drawEllipse(JsVar *parent, int x, int y, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsDrawEllipse(&gfx, x,y,x2,y2);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getPixel",
"generate" : "jswrap_graphics_getPixel",
"params" : [
["x","int32","The left"],
["y","int32","The top"]
],
"return" : ["int32","The color"]
}
Get a pixel's color
*/
int jswrap_graphics_getPixel(JsVar *parent, int x, int y) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
return (int)graphicsGetPixel(&gfx, x, y);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setPixel",
"generate" : "jswrap_graphics_setPixel",
"params" : [
["x","int32","The left"],
["y","int32","The top"],
["col","JsVar","The color (if `undefined`, the foreground color is useD)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set a pixel's color
*/
JsVar *jswrap_graphics_setPixel(JsVar *parent, int x, int y, JsVar *color) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
unsigned int col = gfx.data.fgColor;
if (!jsvIsUndefined(color))
col = jswrap_graphics_toColor(parent,color,0,0);
graphicsSetPixel(&gfx, x, y, col);
gfx.data.cursorX = (short)x;
gfx.data.cursorY = (short)y;
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "toColor",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_toColor",
"params" : [
["r","JsVar","Red (between 0 and 1) **OR** an integer representing the color in the current bit depth and color order **OR** a hexidecimal color string of the form `'#012345'`"],
["g","JsVar","Green (between 0 and 1)"],
["b","JsVar","Blue (between 0 and 1)"]
],
"return" : ["int","The color index represented by the arguments"]
}
Work out the color value to be used in the current bit depth based on the arguments.
This is used internally by setColor and setBgColor
```
// 1 bit
g.toColor(1,1,1) => 1
// 16 bit
g.toColor(1,0,0) => 0xF800
```
*/
unsigned int jswrap_graphics_toColor(JsVar *parent, JsVar *r, JsVar *g, JsVar *b) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
unsigned int color = 0;
#ifdef SAVE_ON_FLASH
if (false) {
#else
JsVarFloat rf, gf, bf;
if (jsvIsString(r)) {
char buf[9];
memset(buf,0,sizeof(buf));
jsvGetString(r,buf,sizeof(buf));
rf = hexToByte(buf[1],buf[2])/256.0;
gf = hexToByte(buf[3],buf[4])/256.0;
bf = hexToByte(buf[5],buf[6])/256.0;
if (rf<0 || gf<0 || bf<0 || buf[7]!=0) {
jsExceptionHere(JSET_ERROR, "If Color is a String, it must be of the form '#rrggbb'");
return 0;
}
} else {
rf = jsvGetFloat(r);
gf = jsvGetFloat(g);
bf = jsvGetFloat(b);
}
if (isfinite(rf) && isfinite(gf) && isfinite(bf)) {
int ri = (int)(rf*256);
int gi = (int)(gf*256);
int bi = (int)(bf*256);
if (ri>255) ri=255;
if (gi>255) gi=255;
if (bi>255) bi=255;
if (ri<0) ri=0;
if (gi<0) gi=0;
if (bi<0) bi=0;
// Check if we need to twiddle colors
int colorMask = gfx.data.flags & JSGRAPHICSFLAGS_COLOR_MASK;
if (colorMask) {
int tmpr, tmpg, tmpb;
tmpr = ri;
tmpg = gi;
tmpb = bi;
switch (colorMask) {
case JSGRAPHICSFLAGS_COLOR_BRG:
ri = tmpb;
gi = tmpr;
bi = tmpg;
break;
case JSGRAPHICSFLAGS_COLOR_BGR:
ri = tmpb;
bi = tmpr;
break;
case JSGRAPHICSFLAGS_COLOR_GBR:
ri = tmpg;
gi = tmpb;
bi = tmpr;
break;
case JSGRAPHICSFLAGS_COLOR_GRB:
ri = tmpg;
gi = tmpr;
break;
case JSGRAPHICSFLAGS_COLOR_RBG:
gi = tmpb;
bi = tmpg;
break;
default: break;
}
}
if (gfx.data.bpp==16) {
color = (unsigned int)((bi>>3) | (gi>>2)<<5 | (ri>>3)<<11);
#ifdef ESPR_GRAPHICS_12BIT
} else if (gfx.data.bpp==12) {
color = (unsigned int)((bi>>4) | (gi>>4)<<4 | (ri>>4)<<8);
#endif
} else if (gfx.data.bpp==32) {
color = 0xFF000000 | (unsigned int)(bi | (gi<<8) | (ri<<16));
} else if (gfx.data.bpp==24) {
color = (unsigned int)(bi | (gi<<8) | (ri<<16));
#if defined(GRAPHICS_PALETTED_IMAGES)
} else if (gfx.data.bpp==4) {
// LCD is paletted - look up in our palette to find the best match
int d = 0x7FFFFFFF;
color = 0;
for (unsigned int i=0;i<16;i++) {
int p = PALETTE_4BIT[i];
int pr = (p>>8)&0xF8;
int pg = (p>>3)&0xFC;
int pb = (p<<3)&0xF8;
pr |= pr>>5;
pg |= pb>>6;
pb |= pb>>5;
int dr = pr-ri;
int dg = pg-gi;
int db = pb-bi;
int dd = dr*dr+dg*dg+db*db;
if (dd<d) {
d=dd;
color=i;
}
}
} else if (gfx.data.bpp==8) {
// LCD is paletted - look up in our palette to find the best match
// TODO: For web palette we should be able to cheat without searching...
int d = 0x7FFFFFFF;
color = 0;
for (int i=0;i<255;i++) {
int p = PALETTE_8BIT[i];
int pr = (p>>8)&0xF8;
int pg = (p>>3)&0xFC;
int pb = (p<<3)&0xF8;
pr |= pr>>5;
pg |= pb>>6;
pb |= pb>>5;
int dr = pr-ri;
int dg = pg-gi;
int db = pb-bi;
int dd = dr*dr+dg*dg+db*db;
if (dd<d) {
d=dd;
color=(unsigned int)i;
}
}
#endif
} else
color = (unsigned int)(((ri+gi+bi)>=384) ? 0xFFFFFFFF : 0);
#endif
} else {
// just rgb
color = (unsigned int)jsvGetInteger(r);
}
return color;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setColor",
"generate_full" : "jswrap_graphics_setColorX(parent, r,g,b, true)",
"params" : [
["r","JsVar","Red (between 0 and 1) **OR** an integer representing the color in the current bit depth and color order **OR** a hexidecimal color string of the form `'#012345'`"],
["g","JsVar","Green (between 0 and 1)"],
["b","JsVar","Blue (between 0 and 1)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set the color to use for subsequent drawing operations.
If just `r` is specified as an integer, the numeric value will be written directly into a pixel. eg. On a 24 bit `Graphics` instance you set bright blue with either `g.setColor(0,0,1)` or `g.setColor(0x0000FF)`.
A good shortcut to ensure you get white on all platforms is to use `g.setColor(-1)`
The mapping is as follows:
* 32 bit: `r,g,b` => `0xFFrrggbb`
* 24 bit: `r,g,b` => `0xrrggbb`
* 16 bit: `r,g,b` => `0brrrrrggggggbbbbb` (RGB565)
* Other bpp: `r,g,b` => white if `r+g+b > 50%`, otherwise black (use `r` on its own as an integer)
If you specified `color_order` when creating the `Graphics` instance, `r`,`g` and `b` will be swapped as you specified.
**Note:** On devices with low flash memory, `r` **must** be an integer representing the color in the current bit depth. It cannot
be a floating point value, and `g` and `b` are ignored.
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setBgColor",
"generate_full" : "jswrap_graphics_setColorX(parent, r,g,b, false)",
"params" : [
["r","JsVar","Red (between 0 and 1) **OR** an integer representing the color in the current bit depth and color order **OR** a hexidecimal color string of the form `'#012345'`"],
["g","JsVar","Green (between 0 and 1)"],
["b","JsVar","Blue (between 0 and 1)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set the background color to use for subsequent drawing operations.
See `Graphics.setColor` for more information on the mapping of `r`, `g`, and `b` to pixel values.
**Note:** On devices with low flash memory, `r` **must** be an integer representing the color in the current bit depth. It cannot
be a floating point value, and `g` and `b` are ignored.
*/
JsVar *jswrap_graphics_setColorX(JsVar *parent, JsVar *r, JsVar *g, JsVar *b, bool isForeground) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
unsigned int color = jswrap_graphics_toColor(parent,r,g,b);
if (isForeground)
gfx.data.fgColor = color;
else
gfx.data.bgColor = color;
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getColor",
"generate_full" : "jswrap_graphics_getColorX(parent, true)",
"return" : ["int","The integer value of the colour"]
}
Get the color to use for subsequent drawing operations
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getBgColor",
"generate_full" : "jswrap_graphics_getColorX(parent, false)",
"return" : ["int","The integer value of the colour"]
}
Get the background color to use for subsequent drawing operations
*/
JsVarInt jswrap_graphics_getColorX(JsVar *parent, bool isForeground) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
return (JsVarInt)((isForeground ? gfx.data.fgColor : gfx.data.bgColor) & ((1UL<<gfx.data.bpp)-1));
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setClipRect",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_setClipRect",
"params" : [
["x1","int","Top left X coordinate"],
["y1","int","Top left Y coordinate"],
["x2","int","Bottom right X coordinate"],
["y2","int","Bottom right Y coordinate"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
This sets the 'clip rect' that subsequent drawing operations are clipped to
sit between.
These values are inclusive - eg `g.setClipRect(1,0,5,0)` will ensure that only
pixel rows 1,2,3,4,5 are touched on column 0.
**Note:** For maximum flexibility, the values here are not range checked. For normal
use, unsure X and Y are between 0 and `getWidth`/`getHeight`.
*/
JsVar *jswrap_graphics_setClipRect(JsVar *parent, int x1, int y1, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
#ifndef SAVE_ON_FLASH
gfx.data.clipRect.x1 = (unsigned short)x1;
gfx.data.clipRect.y1 = (unsigned short)y1;
gfx.data.clipRect.x2 = (unsigned short)x2;
gfx.data.clipRect.y2 = (unsigned short)y2;
graphicsSetVar(&gfx);
#endif
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setFontBitmap",
"generate_full" : "jswrap_graphics_setFontSizeX(parent, 1+JSGRAPHICS_FONTSIZE_4X6, false)",
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Make subsequent calls to `drawString` use the built-in 4x6 pixel bitmapped Font
It is recommended that you use `Graphics.setFont("4x6")` for more flexibility.
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setFontVector",
"ifndef" : "SAVE_ON_FLASH",
"generate_full" : "jswrap_graphics_setFontSizeX(parent, size, true)",
"params" : [
["size","int32","The height of the font, as an integer"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Make subsequent calls to `drawString` use a Vector Font of the given height.
It is recommended that you use `Graphics.setFont("Vector", size)` for more flexibility.
*/
JsVar *jswrap_graphics_setFontSizeX(JsVar *parent, int size, bool isVectorFont) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
#ifdef NO_VECTOR_FONT
if (isVectorFont)
jsExceptionHere(JSET_ERROR, "No vector font in this build");
#else
if (isVectorFont) {
if (size<1) size=1;
if (size>1023) size=1023;
}
#ifndef SAVE_ON_FLASH
if ((gfx.data.fontSize&JSGRAPHICS_FONTSIZE_CUSTOM_BIT) &&
!(size&JSGRAPHICS_FONTSIZE_CUSTOM_BIT)) {
jsvObjectRemoveChild(parent, JSGRAPHICS_CUSTOMFONT_BMP);
jsvObjectRemoveChild(parent, JSGRAPHICS_CUSTOMFONT_WIDTH);
jsvObjectRemoveChild(parent, JSGRAPHICS_CUSTOMFONT_HEIGHT);
jsvObjectRemoveChild(parent, JSGRAPHICS_CUSTOMFONT_FIRSTCHAR);
}
#endif
gfx.data.fontSize = (unsigned short)size;
graphicsSetVar(&gfx);
#endif
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setFontCustom",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_setFontCustom",
"params" : [
["bitmap","JsVar","A column-first, MSB-first, 1bpp bitmap containing the font bitmap"],
["firstChar","int32","The first character in the font - usually 32 (space)"],
["width","JsVar","The width of each character in the font. Either an integer, or a string where each character represents the width"],
["height","int32","The height as an integer (max 255). Bits 8-15 represent the scale factor (eg. `2<<8` is twice the size). Bits 16-23 represent the BPP (0,1=1 bpp, 2=2 bpp, 4=4 bpp)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Make subsequent calls to `drawString` use a Custom Font of the given height. See the [Fonts page](http://www.espruino.com/Fonts) for more
information about custom fonts and how to create them.
*/
#ifndef SAVE_ON_FLASH
JsVar *jswrap_graphics_setFontCustom(JsVar *parent, JsVar *bitmap, int firstChar, JsVar *width, int height) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
if (!jsvIsString(bitmap)) {
jsExceptionHere(JSET_ERROR, "Font bitmap must be a String");
return 0;
}
if (firstChar<0 || firstChar>255) {
jsExceptionHere(JSET_ERROR, "First character out of range");
return 0;
}
if (!jsvIsString(width) && !jsvIsInt(width)) {
jsExceptionHere(JSET_ERROR, "Font width must be a String or an integer");
return 0;
}
int scale = (height>>8)&255;
if (scale<1) scale=1;
int bpp = height>>16;
if (bpp<1) bpp=1;
JsGraphicsFontSize fontType;
if (bpp==1) fontType = JSGRAPHICS_FONTSIZE_CUSTOM_1BPP;
else if (bpp==2) fontType = JSGRAPHICS_FONTSIZE_CUSTOM_2BPP;
else if (bpp==4) fontType = JSGRAPHICS_FONTSIZE_CUSTOM_4BPP;
else {
jsExceptionHere(JSET_ERROR, "Invalid BPP - 1,2,4 supported");
return 0;
}
height = height&255;
jsvObjectSetChild(parent, JSGRAPHICS_CUSTOMFONT_BMP, bitmap);
jsvObjectSetChild(parent, JSGRAPHICS_CUSTOMFONT_WIDTH, width);
jsvObjectSetChildAndUnLock(parent, JSGRAPHICS_CUSTOMFONT_HEIGHT, jsvNewFromInteger(height));
jsvObjectSetChildAndUnLock(parent, JSGRAPHICS_CUSTOMFONT_FIRSTCHAR, jsvNewFromInteger(firstChar));
gfx.data.fontSize = (unsigned short)(scale + fontType);
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
#endif
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setFontAlign",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_setFontAlign",
"params" : [
["x","int32","X alignment. -1=left (default), 0=center, 1=right"],
["y","int32","Y alignment. -1=top (default), 0=center, 1=bottom"],
["rotation","int32","Rotation of the text. 0=normal, 1=90 degrees clockwise, 2=180, 3=270"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set the alignment for subsequent calls to `drawString`
*/
JsVar *jswrap_graphics_setFontAlign(JsVar *parent, int x, int y, int r) {
#ifndef SAVE_ON_FLASH
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
if (x<-1) x=-1;
if (x>1) x=1;
if (y<-1) y=-1;
if (y>1) y=1;
if (r<0) r=0;
if (r>3) r=3;
gfx.data.fontAlignX = x;
gfx.data.fontAlignY = y;
gfx.data.fontRotate = r;
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setFont",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_setFont",
"params" : [
["name","JsVar","The name of the font to use (if undefined, the standard 4x6 font will be used)"],
["size","int","The size of the font (or undefined)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set the font by name, eg "4x6", or "Vector12".
For bitmap fonts you can also specify a size multiplier, for example `g.setFont("4x6",2)` will double the size of the standard 4x6 bitmap font to 8x12.
*/
JsVar *jswrap_graphics_setFont(JsVar *parent, JsVar *name, int size) {
#ifndef SAVE_ON_FLASH
if (!jsvIsString(name)) return 0;
unsigned short sz = 0xFFFF;
bool isVector = false;
#ifndef NO_VECTOR_FONT
if (jsvIsStringEqualOrStartsWith(name, "Vector", true)) {
sz = (unsigned short)jsvGetIntegerAndUnLock(jsvNewFromStringVar(name, 6, JSVAPPENDSTRINGVAR_MAXLENGTH));
if (size>0) sz = (unsigned short)size;
isVector = true;
}
#endif
if (size<1) size=1;
if (size>JSGRAPHICS_FONTSIZE_SCALE_MASK) size=JSGRAPHICS_FONTSIZE_SCALE_MASK;
if (jsvIsUndefined(name) || jsvIsStringEqual(name, "4x6"))
sz = (unsigned short)(size + JSGRAPHICS_FONTSIZE_4X6);
#ifdef USE_FONT_6X8
if (jsvIsStringEqual(name, "6x8"))
sz = (unsigned short)(size + JSGRAPHICS_FONTSIZE_6X8);
#endif
#ifndef SAVE_ON_FLASH
// if function named 'setFontXYZ' exists, run it
if (sz==0xFFFF) {
JsVar *setterName = jsvVarPrintf("setFont%v",name);
JsVar *fontSetter = jspGetVarNamedField(parent,setterName,false);
if (fontSetter) {
jsvUnLock(jspExecuteFunction(fontSetter,parent,0,NULL));
sz = (unsigned short)(size + JSGRAPHICS_FONTSIZE_CUSTOM_1BPP);
}
jsvUnLock2(fontSetter,setterName);
}
#endif
if (sz==0xFFFF) {
jsExceptionHere(JSET_ERROR, "Unknown font %j", name);
}
return jswrap_graphics_setFontSizeX(parent, sz, isVector);
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getFont",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_getFont",
"return" : ["JsVar","Get the name of the current font"],
"return_object" : "String"
}
Get the font by name - can be saved and used with `Graphics.setFont`
*/
JsVar *jswrap_graphics_getFont(JsVar *parent) {
#ifndef SAVE_ON_FLASH
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
JsGraphicsFontSize f = gfx.data.fontSize & JSGRAPHICS_FONTSIZE_FONT_MASK;
#ifndef NO_VECTOR_FONT
if (f == JSGRAPHICS_FONTSIZE_VECTOR)
return jsvVarPrintf("Vector%d",gfx.data.fontSize & JSGRAPHICS_FONTSIZE_SCALE_MASK);
#endif
if (f == JSGRAPHICS_FONTSIZE_4X6)
return jsvNewFromString("4x6");
#ifdef USE_FONT_6X8
if (f == JSGRAPHICS_FONTSIZE_6X8)
return jsvNewFromString("6x8");
#endif
#ifndef SAVE_ON_FLASH
if (f & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
// not implemented yet because it's painful trying to pass 5 arguments into setFontCustom
/*JsVar *n = jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_NAME, 0);
if (n) return n;*/
return jsvNewFromString("Custom");
}
#endif
return jsvNewFromInteger(gfx.data.fontSize);
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getFonts",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_getFonts",
"return" : ["JsVar","And array of font names"],
"return_object" : "Array"
}
Return an array of all fonts currently in the Graphics library.
**Note:** Vector fonts are specified as `Vector#` where `#` is the font height. As there
are effectively infinite fonts, just `Vector` is included in the list.
*/
JsVar *jswrap_graphics_getFonts(JsVar *parent) {
#ifndef SAVE_ON_FLASH
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
JsVar *arr = jsvNewEmptyArray();
if (!arr) return 0;
jsvArrayPushAndUnLock(arr, jsvNewFromString("4x6"));
#ifdef USE_FONT_6X8
jsvArrayPushAndUnLock(arr, jsvNewFromString("6x8"));
#endif
#ifndef NO_VECTOR_FONT
jsvArrayPushAndUnLock(arr, jsvNewFromString("Vector"));
#endif
JsVar *c = jspGetPrototype(parent);
JsvObjectIterator it;
jsvObjectIteratorNew(&it, c);
while (jsvObjectIteratorHasValue(&it)) {
JsVar *k = jsvObjectIteratorGetKey(&it);
if (jsvIsStringEqualOrStartsWith(k,"setFont",true))
jsvArrayPushAndUnLock(arr, jsvNewFromStringVar(k,7,JSVAPPENDSTRINGVAR_MAXLENGTH));
jsvUnLock(k);
jsvObjectIteratorNext(&it);
}
jsvObjectIteratorFree(&it);
jsvUnLock(c);
return arr;
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getFontHeight",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_getFontHeight",
"return" : ["int","The height in pixels of the current font"]
}
Return the height in pixels of the current font
*/
static int jswrap_graphics_getFontHeightInternal(JsGraphics *gfx) {
JsGraphicsFontSize f = gfx->data.fontSize & JSGRAPHICS_FONTSIZE_FONT_MASK;
unsigned short scale = gfx->data.fontSize & JSGRAPHICS_FONTSIZE_SCALE_MASK;
if (f == JSGRAPHICS_FONTSIZE_VECTOR) {
return scale;
} else if (f == JSGRAPHICS_FONTSIZE_4X6) {
return 6*scale;
#ifdef USE_FONT_6X8
} else if (f == JSGRAPHICS_FONTSIZE_6X8) {
return 8*scale;
#endif
#ifndef SAVE_ON_FLASH
} else if (f & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
return scale*(int)jsvGetIntegerAndUnLock(jsvObjectGetChild(gfx->graphicsVar, JSGRAPHICS_CUSTOMFONT_HEIGHT, 0));
#endif
}
return 0;
}
int jswrap_graphics_getFontHeight(JsVar *parent) {
#ifndef SAVE_ON_FLASH
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
return jswrap_graphics_getFontHeightInternal(&gfx);
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawString",
"generate" : "jswrap_graphics_drawString",
"params" : [
["str","JsVar","The string"],
["x","int32","The X position of the leftmost pixel"],
["y","int32","The Y position of the topmost pixel"],
["solid","bool","For bitmap fonts, should empty pixels be filled with the background color?"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a string of text in the current font
*/
JsVar *jswrap_graphics_drawString(JsVar *parent, JsVar *var, int x, int y, bool solidBackground) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
JsGraphicsFontSize font = gfx.data.fontSize & JSGRAPHICS_FONTSIZE_FONT_MASK;
unsigned short scale = gfx.data.fontSize & JSGRAPHICS_FONTSIZE_SCALE_MASK;
int fontHeight = jswrap_graphics_getFontHeightInternal(&gfx);
#ifndef SAVE_ON_FLASH
JsVar *customBitmap = 0, *customWidth = 0;
int customBPP = 1;
int customFirstChar = 0;
if (font & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
if (font==JSGRAPHICS_FONTSIZE_CUSTOM_2BPP) customBPP = 2;
if (font==JSGRAPHICS_FONTSIZE_CUSTOM_4BPP) customBPP = 4;
customBitmap = jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_BMP, 0);
customWidth = jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_WIDTH, 0);
customFirstChar = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_FIRSTCHAR, 0));
}
#endif
#ifndef SAVE_ON_FLASH
// Handle text rotation
JsGraphicsFlags oldFlags = gfx.data.flags;
if (gfx.data.fontRotate==1) {
gfx.data.flags ^= JSGRAPHICSFLAGS_SWAP_XY | JSGRAPHICSFLAGS_INVERT_X;
int t = gfx.data.width - (x+1);
x = y;
y = t;
} else if (gfx.data.fontRotate==2) {
gfx.data.flags ^= JSGRAPHICSFLAGS_INVERT_X | JSGRAPHICSFLAGS_INVERT_Y;
x = gfx.data.width - (x+1);
y = gfx.data.height - (y+1);
} else if (gfx.data.fontRotate==3) {
gfx.data.flags ^= JSGRAPHICSFLAGS_SWAP_XY | JSGRAPHICSFLAGS_INVERT_Y;
int t = gfx.data.height - (y+1);
y = x;
x = t;
}
// Handle font alignment
if (gfx.data.fontAlignX<2) // 0=center, 1=right, 2=undefined, 3=left
x -= jswrap_graphics_stringWidth(parent, var) * (gfx.data.fontAlignX+1)/2;
if (gfx.data.fontAlignY<2) // 0=center, 1=bottom, 2=undefined, 3=top
y -= fontHeight * (gfx.data.fontAlignY+1)/2;
int minX = (gfx.data.flags & JSGRAPHICSFLAGS_SWAP_XY) ? gfx.data.clipRect.y1 : gfx.data.clipRect.x1;
int minY = (gfx.data.flags & JSGRAPHICSFLAGS_SWAP_XY) ? gfx.data.clipRect.x1 : gfx.data.clipRect.y1;
int maxX = (gfx.data.flags & JSGRAPHICSFLAGS_SWAP_XY) ? gfx.data.clipRect.y2 : gfx.data.clipRect.x2;
int maxY = (gfx.data.flags & JSGRAPHICSFLAGS_SWAP_XY) ? gfx.data.clipRect.x2 : gfx.data.clipRect.y2;
#else
int minX = 0;
int minY = 0;
int maxX = graphicsGetWidth(&gfx) - 1;
int maxY = graphicsGetHeight(&gfx) - 1;
#endif
int startx = x;
JsVar *str = jsvAsString(var);
JsvStringIterator it;
jsvStringIteratorNew(&it, str, 0);
while (jsvStringIteratorHasChar(&it)) {
char ch = jsvStringIteratorGetCharAndNext(&it);
if (ch=='\n') {
x = startx;
y += fontHeight;
continue;
}
if (font == JSGRAPHICS_FONTSIZE_VECTOR) {
#ifndef NO_VECTOR_FONT
int w = (int)graphicsVectorCharWidth(&gfx, gfx.data.fontSize, ch);
if (x>minX-w && x<maxX && y>minY-gfx.data.fontSize && y<maxY)
graphicsFillVectorChar(&gfx, x, y, gfx.data.fontSize, ch);
x+=w;
#endif
} else if (font == JSGRAPHICS_FONTSIZE_4X6) {
if (x>minX-4 && x<maxX && y>minY-6 && y<maxY)
graphicsDrawChar4x6(&gfx, x, y, ch, scale, solidBackground);
x+=4*scale;
#ifdef USE_FONT_6X8
} else if (font == JSGRAPHICS_FONTSIZE_6X8) {
if (x>minX-6 && x<maxX && y>minY-8 && y<maxY)
graphicsDrawChar6x8(&gfx, x, y, ch, scale, solidBackground);
x+=6*scale;
#endif
#ifndef SAVE_ON_FLASH
} else if (font & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
int customBPPRange = (1<<customBPP)-1;
// get char width and offset in string
int width = 0, bmpOffset = 0;
if (jsvIsString(customWidth)) {
if (ch>=customFirstChar) {
JsvStringIterator wit;
jsvStringIteratorNew(&wit, customWidth, 0);
while (jsvStringIteratorHasChar(&wit) && (int)jsvStringIteratorGetIndex(&wit)<(ch-customFirstChar)) {
bmpOffset += (unsigned char)jsvStringIteratorGetCharAndNext(&wit);
}
width = (unsigned char)jsvStringIteratorGetChar(&wit);
jsvStringIteratorFree(&wit);
}
} else {
width = (int)jsvGetInteger(customWidth);
bmpOffset = width*(ch-customFirstChar);
}
if (ch>=customFirstChar && (x>minX-width) && (x<maxX) && (y>minY-fontHeight) && y<maxY) {
int ch = fontHeight/scale;
bmpOffset *= ch * customBPP;
// now render character
JsvStringIterator cit;
jsvStringIteratorNew(&cit, customBitmap, (size_t)(bmpOffset>>3));
bmpOffset &= 7;
int cx,cy;
int citdata = jsvStringIteratorGetChar(&cit);
citdata <<= customBPP*bmpOffset;
for (cx=0;cx<width;cx++) {
for (cy=0;cy<ch;cy++) {
int col = ((citdata&255)>>(8-customBPP));
if (solidBackground || col)
graphicsFillRect(&gfx,
(x + cx*scale),
(y + cy*scale),
(x + cx*scale + scale-1),
(y + cy*scale + scale-1),
graphicsBlendColor(&gfx, (256*col)/customBPPRange));
bmpOffset += customBPP;
citdata <<= customBPP;
if (bmpOffset>=8) {
bmpOffset=0;
jsvStringIteratorNext(&cit);
citdata = jsvStringIteratorGetChar(&cit);
}
}
}
jsvStringIteratorFree(&cit);
}
x += width*scale;
#endif
}
if (jspIsInterrupted()) break;
}
jsvStringIteratorFree(&it);
jsvUnLock(str);
#ifndef SAVE_ON_FLASH
jsvUnLock2(customBitmap, customWidth);
#endif
#ifndef SAVE_ON_FLASH
gfx.data.flags = oldFlags; // restore flags because of text rotation
graphicsSetVar(&gfx); // gfx data changed because modified area
#endif
return jsvLockAgain(parent);
}
/// Convenience function for using drawString from C code
void jswrap_graphics_drawCString(JsGraphics *gfx, int x, int y, char *str) {
JsVar *s = jsvNewFromString(str);
jsvUnLock2(jswrap_graphics_drawString(gfx->graphicsVar, s, x, y, false),s);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "stringWidth",
"generate" : "jswrap_graphics_stringWidth",
"params" : [
["str","JsVar","The string"]
],
"return" : ["int","The length of the string in pixels"]
}
Return the size in pixels of a string of text in the current font
*/
JsVarInt jswrap_graphics_stringWidth(JsVar *parent, JsVar *var) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
JsGraphicsFontSize font = gfx.data.fontSize & JSGRAPHICS_FONTSIZE_FONT_MASK;
unsigned short scale = gfx.data.fontSize & JSGRAPHICS_FONTSIZE_SCALE_MASK;
#ifndef SAVE_ON_FLASH
JsVar *customWidth = 0;
int customFirstChar = 0;
if (font & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
customWidth = jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_WIDTH, 0);
customFirstChar = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(parent, JSGRAPHICS_CUSTOMFONT_FIRSTCHAR, 0));
}
#endif
JsVar *str = jsvAsString(var);
JsvStringIterator it;
jsvStringIteratorNew(&it, str, 0);
int width = 0;
int maxWidth = 0;
while (jsvStringIteratorHasChar(&it)) {
char ch = jsvStringIteratorGetChar(&it);
if (ch=='\n') {
if (width>maxWidth) maxWidth=width;
width = 0;
}
if (font == JSGRAPHICS_FONTSIZE_VECTOR) {
#ifndef NO_VECTOR_FONT
width += (int)graphicsVectorCharWidth(&gfx, scale, ch);
#endif
} else if (font == JSGRAPHICS_FONTSIZE_4X6) {
width += 4*scale;
#ifdef USE_FONT_6X8
} else if (font == JSGRAPHICS_FONTSIZE_6X8) {
width += 6*scale;
#endif
#ifndef SAVE_ON_FLASH
} else if (font & JSGRAPHICS_FONTSIZE_CUSTOM_BIT) {
if (jsvIsString(customWidth)) {
if (ch>=customFirstChar)
width += scale*(unsigned char)jsvGetCharInString(customWidth, (size_t)(ch-customFirstChar));
} else
width += scale*(int)jsvGetInteger(customWidth);
#endif
}
jsvStringIteratorNext(&it);
}
jsvStringIteratorFree(&it);
#ifndef SAVE_ON_FLASH
jsvUnLock(customWidth);
#endif
jsvUnLock(str);
return width>maxWidth ? width : maxWidth;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawLine",
"generate" : "jswrap_graphics_drawLine",
"params" : [
["x1","int32","The left"],
["y1","int32","The top"],
["x2","int32","The right"],
["y2","int32","The bottom"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a line between x1,y1 and x2,y2 in the current foreground color
*/
JsVar *jswrap_graphics_drawLine(JsVar *parent, int x1, int y1, int x2, int y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsDrawLine(&gfx, x1,y1,x2,y2);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawLineAA",
"ifdef" : "GRAPHICS_ANTIALIAS",
"generate" : "jswrap_graphics_drawLineAA",
"params" : [
["x1","float","The left"],
["y1","float","The top"],
["x2","float","The right"],
["y2","float","The bottom"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a line between x1,y1 and x2,y2 in the current foreground color
*/
JsVar *jswrap_graphics_drawLineAA(JsVar *parent, double x1, double y1, double x2, double y2) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsDrawLineAA(&gfx,
(int)(x1*16+0.5),
(int)(y1*16+0.5),
(int)(x2*16+0.5),
(int)(y2*16+0.5));
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "lineTo",
"generate" : "jswrap_graphics_lineTo",
"params" : [
["x","int32","X value"],
["y","int32","Y value"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a line from the last position of lineTo or moveTo to this position
*/
JsVar *jswrap_graphics_lineTo(JsVar *parent, int x, int y) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsDrawLine(&gfx, gfx.data.cursorX, gfx.data.cursorY, x, y);
gfx.data.cursorX = (short)x;
gfx.data.cursorY = (short)y;
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "moveTo",
"generate" : "jswrap_graphics_moveTo",
"params" : [
["x","int32","X value"],
["y","int32","Y value"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Move the cursor to a position - see lineTo
*/
JsVar *jswrap_graphics_moveTo(JsVar *parent, int x, int y) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
gfx.data.cursorX = (short)x;
gfx.data.cursorY = (short)y;
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawPoly",
"ifndef" : "SAVE_ON_FLASH",
"generate_full" : "jswrap_graphics_drawPoly_X(parent, poly, closed, false)",
"params" : [
["poly","JsVar","An array of vertices, of the form ```[x1,y1,x2,y2,x3,y3,etc]```"],
["closed","bool","Draw another line between the last element of the array and the first"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a polyline (lines between each of the points in `poly`) in the current foreground color
*/
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawPolyAA",
"ifdef" : "GRAPHICS_ANTIALIAS",
"generate_full" : "jswrap_graphics_drawPoly_X(parent, poly, closed, true)",
"params" : [
["poly","JsVar","An array of vertices, of the form ```[x1,y1,x2,y2,x3,y3,etc]```"],
["closed","bool","Draw another line between the last element of the array and the first"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw an **antialiased** polyline (lines between each of the points in `poly`) in the current foreground color
*/
JsVar *jswrap_graphics_drawPoly_X(JsVar *parent, JsVar *poly, bool closed, bool antiAlias) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
if (!jsvIsIterable(poly)) return 0;
int scale;
void (*drawFn)(JsGraphics *gfx, int x1, int y1, int x2, int y2);
#ifdef GRAPHICS_ANTIALIAS
if (antiAlias) {
scale = 16;
drawFn = graphicsDrawLineAA;
} else
#endif
{
scale = 1;
drawFn = graphicsDrawLine;
}
int lx,ly;
int startx, starty;
int idx = 0;
JsvIterator it;
jsvIteratorNew(&it, poly, JSIF_EVERY_ARRAY_ELEMENT);
while (jsvIteratorHasElement(&it)) {
int x,y;
x = (int)((jsvIteratorGetFloatValue(&it)*scale)+0.5);
jsvIteratorNext(&it);
y = (int)((jsvIteratorGetFloatValue(&it)*scale)+0.5);
jsvIteratorNext(&it);
if (idx==0) { // save xy positions of first point
startx = x;
starty = y;
} else {
// only start drawing between the first 2 points
drawFn(&gfx, lx, ly, x, y);
}
lx = x;
ly = y;
idx++;
}
jsvIteratorFree(&it);
gfx.data.cursorX = (short)(lx/scale);
gfx.data.cursorY = (short)(ly/scale);
// if closed, draw between first and last points
if (closed)
drawFn(&gfx, lx, ly, startx, starty);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "fillPoly",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_fillPoly",
"params" : [
["poly","JsVar","An array of vertices, of the form ```[x1,y1,x2,y2,x3,y3,etc]```"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draw a filled polygon in the current foreground color.
```
g.fillPoly([
16, 0,
31, 31,
26, 31,
16, 12,
6, 28,
0, 27 ]);
```
This fills from the top left hand side of the polygon (low X, low Y)
*down to but not including* the bottom right. When placed together polygons
will align perfectly without overdraw - but this will not fill the
same pixels as `drawPoly` (drawing a line around the edge of the polygon).
*/
JsVar *jswrap_graphics_fillPoly(JsVar *parent, JsVar *poly) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
if (!jsvIsIterable(poly)) return 0;
const int maxVerts = 128;
short verts[maxVerts];
int idx = 0;
JsvIterator it;
jsvIteratorNew(&it, poly, JSIF_EVERY_ARRAY_ELEMENT);
while (jsvIteratorHasElement(&it) && idx<maxVerts) {
verts[idx++] = (short)(0.5 + jsvIteratorGetFloatValue(&it)*16);
jsvIteratorNext(&it);
}
jsvIteratorFree(&it);
if (idx==maxVerts) {
jsWarn("Maximum number of points (%d) exceeded for fillPoly", maxVerts/2);
}
graphicsFillPoly(&gfx, idx/2, verts);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "setRotation",
"generate" : "jswrap_graphics_setRotation",
"params" : [
["rotation","int32","The clockwise rotation. 0 for no rotation, 1 for 90 degrees, 2 for 180, 3 for 270"],
["reflect","bool","Whether to reflect the image"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Set the current rotation of the graphics device.
*/
JsVar *jswrap_graphics_setRotation(JsVar *parent, int rotation, bool reflect) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
// clear flags
gfx.data.flags &= (JsGraphicsFlags)~(JSGRAPHICSFLAGS_SWAP_XY | JSGRAPHICSFLAGS_INVERT_X | JSGRAPHICSFLAGS_INVERT_Y);
// set flags
switch (rotation) {
case 0:
break;
case 1:
gfx.data.flags |= JSGRAPHICSFLAGS_SWAP_XY | JSGRAPHICSFLAGS_INVERT_X;
break;
case 2:
gfx.data.flags |= JSGRAPHICSFLAGS_INVERT_X | JSGRAPHICSFLAGS_INVERT_Y;
break;
case 3:
gfx.data.flags |= JSGRAPHICSFLAGS_SWAP_XY | JSGRAPHICSFLAGS_INVERT_Y;
break;
}
if (reflect) {
if (gfx.data.flags & JSGRAPHICSFLAGS_SWAP_XY)
gfx.data.flags ^= JSGRAPHICSFLAGS_INVERT_Y;
else
gfx.data.flags ^= JSGRAPHICSFLAGS_INVERT_X;
}
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
/// Info about an image to be used for rendering
typedef struct {
int width, height, bpp;
bool isTransparent;
unsigned int transparentCol;
JsVar *buffer; // must be unlocked!
int bufferOffset; // start offset in imageBuffer
const uint16_t *palettePtr;
uint32_t paletteMask;
unsigned int bitMask;
unsigned int pixelsPerByteMask;
int stride; // bytes per line
uint16_t _simplePalette[4]; // used when a palette is created for rendering
} GfxDrawImageInfo;
/// Parse an image into GfxDrawImageInfo. See drawImage for image format docs. Returns true on success
static bool _jswrap_graphics_parseImage(JsGraphics *gfx, JsVar *image, GfxDrawImageInfo *info) {
memset(info, 0, sizeof(GfxDrawImageInfo));
if (jsvIsObject(image)) {
info->width = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(image, "width", 0));
info->height = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(image, "height", 0));
info->bpp = (int)jsvGetIntegerAndUnLock(jsvObjectGetChild(image, "bpp", 0));
if (info->bpp<=0) info->bpp=1;
JsVar *v;
v = jsvObjectGetChild(image, "transparent", 0);
info->isTransparent = v!=0;
info->transparentCol = (unsigned int)jsvGetIntegerAndUnLock(v);
v = jsvObjectGetChild(image, "palette", 0);
if (v) {
if (jsvIsArrayBuffer(v) && v->varData.arraybuffer.type==ARRAYBUFFERVIEW_UINT16) {
size_t l = 0;
info->palettePtr = (uint16_t *)jsvGetDataPointer(v, &l);
jsvUnLock(v);
if (l==2 || l==4 || l==16 || l==256)
info->paletteMask = (uint32_t)(l-1);
else {
info->palettePtr = 0;
}
} else
jsvUnLock(v);
if (!info->palettePtr) {
jsExceptionHere(JSET_ERROR, "palette specified, but must be a flat Uint16Array of 2,4,16,256 elements");
return false;
}
}
JsVar *buf = jsvObjectGetChild(image, "buffer", 0);
info->buffer = jsvGetArrayBufferBackingString(buf);
jsvUnLock(buf);
info->bufferOffset = 0;
} else if (jsvIsString(image) || jsvIsArrayBuffer(image)) {
if (jsvIsArrayBuffer(image)) {
info->buffer = jsvGetArrayBufferBackingString(image);
} else {
info->buffer = jsvLockAgain(image);
}
info->width = (unsigned char)jsvGetCharInString(info->buffer,0);
info->height = (unsigned char)jsvGetCharInString(info->buffer,1);
info->bpp = (unsigned char)jsvGetCharInString(info->buffer,2);
if (info->bpp & 128) {
info->bpp = info->bpp&127;
info->isTransparent = true;
info->transparentCol = (unsigned char)jsvGetCharInString(info->buffer,3);
info->bufferOffset = 4;
} else {
info->bufferOffset = 3;
}
} else {
jsExceptionHere(JSET_ERROR, "Expecting first argument to be an object or a String");
return 0;
}
if (!info->isTransparent)
info->transparentCol = 0xFFFFFFFF;
if (info->palettePtr==0) {
if (info->bpp==1) {
info->_simplePalette[0] = (uint16_t)gfx->data.bgColor;
info->_simplePalette[1] = (uint16_t)gfx->data.fgColor;
info->palettePtr = info->_simplePalette;
info->paletteMask = 1;
#ifdef GRAPHICS_PALETTED_IMAGES
} else if (gfx->data.bpp>8 && info->bpp==2) { // Blend from bg to fg
info->_simplePalette[0] = (uint16_t)gfx->data.bgColor;
info->_simplePalette[1] = graphicsBlendColor(gfx, 85);
info->_simplePalette[2] = graphicsBlendColor(gfx, 171);
info->_simplePalette[3] = (uint16_t)gfx->data.fgColor;
info->palettePtr = info->_simplePalette;
info->paletteMask = 3;
} else if (gfx->data.bpp==PALETTE_BPP && info->bpp==4) { // palette is 16 bits, so don't use it for other things
info->palettePtr = PALETTE_4BIT;
info->paletteMask = 15;
} else if (gfx->data.bpp==PALETTE_BPP && info->bpp==8) { // palette is 16 bits, so don't use it for other things
info->palettePtr = PALETTE_8BIT;
info->paletteMask = 255;
} else if (gfx->data.bpp==8 && info->bpp==4) {
info->palettePtr = PALETTE_4BIT_TO_8BIT;
info->paletteMask = 15;
#endif
}
}
if ((!jsvIsString(info->buffer)) ||
info->width<=0 ||
info->height<=0 ||
info->bpp>32) {
jsExceptionHere(JSET_ERROR, "Expecting first argument to a valid Image");
jsvUnLock(info->buffer);
return false;
}
info->bitMask = (unsigned int)((1L<<info->bpp)-1L);
info->pixelsPerByteMask = (unsigned int)((info->bpp<8)?(8/info->bpp)-1:0);
info->stride = (info->width*info->bpp + 7)>>3;
return true;
}
/// This is for rotating and scaling layers
typedef struct {
int x1,y1,x2,y2; //x2/y2 is exclusive
double rotate; // radians
double scale; // 1 = 1:1, 2 = big
bool center; // center on x1/y1 (which are then offset)
bool repeat; // tile the image
GfxDrawImageInfo img;
// for rendering
JsvStringIterator it;
int mx,my; //< max - width and height << 8
int sx,sy; //< iterator X increment
int px,py; //< y iterator position
int qx,qy; //< x iterator position
} GfxDrawImageLayer;
bool _jswrap_drawImageLayerGetPixel(GfxDrawImageLayer *l, unsigned int *result) {
int qx = l->qx+127;
int qy = l->qy+127;
if (qx>=0 && qy>=0 && qx<l->mx && qy<l->my) {
unsigned int colData = 0;
int imagex = qx>>8;
int imagey = qy>>8;
// TODO: getter callback for speed?
if (l->img.bpp==8) { // fast path for 8 bits
jsvStringIteratorGoto(&l->it, l->img.buffer, (size_t)(l->img.bufferOffset+imagex+(imagey*l->img.stride)));
colData = (unsigned char)jsvStringIteratorGetChar(&l->it);
} else {
int pixelOffset = (imagex+(imagey*l->img.width));
int bitOffset = pixelOffset*l->img.bpp;
jsvStringIteratorGoto(&l->it, l->img.buffer, (size_t)(l->img.bufferOffset+(bitOffset>>3)));
colData = (unsigned char)jsvStringIteratorGetChar(&l->it);
for (int b=8;b<l->img.bpp;b+=8) {
jsvStringIteratorNext(&l->it);
colData = (colData<<8) | (unsigned char)jsvStringIteratorGetChar(&l->it);
}
colData = (colData>>((l->img.pixelsPerByteMask-((unsigned)pixelOffset&l->img.pixelsPerByteMask))*(unsigned)l->img.bpp)) & l->img.bitMask;
}
if (l->img.transparentCol!=colData) {
if (l->img.palettePtr) colData = l->img.palettePtr[colData&l->img.paletteMask];
*result = colData;
return true;
}
}
return false;
}
NO_INLINE void _jswrap_drawImageLayerInit(GfxDrawImageLayer *l) {
// image max
l->mx = l->img.width<<8;
l->my = l->img.height<<8;
// step values for blitting rotated image
double vcos = cos(l->rotate);
double vsin = sin(l->rotate);
l->sx = (int)((vcos/l->scale)*256 + 0.5);
l->sy = (int)((vsin/l->scale)*256 + 0.5);
// work out actual image width and height
int iw = (int)(0.5 + l->scale*(l->img.width*fabs(vcos) + l->img.height*fabs(vsin)));
int ih = (int)(0.5 + l->scale*(l->img.width*fabs(vsin) + l->img.height*fabs(vcos)));
// if rotating, offset our start position from center
if (l->center) {
l->x1 -= iw/2;
l->y1 -= ih/2;
}
l->x2 = l->x1 + iw;
l->y2 = l->y1 + ih;
// work out start position in the image
int centerx = l->img.width*128;
int centery = l->img.height*128;
l->px = centerx - (1 + (l->sx*iw) + (l->sy*ih)) / 2;
l->py = centery - (1 + (l->sx*ih) - (l->sy*iw)) / 2;
// handle repetition
if (l->repeat) {
// for the range we're in, it's quicker/easier than modulo
while (l->px < 0) l->px += l->mx;
while (l->px >= l->mx) l->px -= l->mx;
while (l->py < 0) l->py += l->my;
while (l->py >= l->my) l->py -= l->my;
}
}
NO_INLINE void _jswrap_drawImageLayerSetStart(GfxDrawImageLayer *l, int x, int y) {
int dx = x - l->x1;
int dy = y - l->y1;
l->px += l->sx*dx + l->sy*dy;
l->py += l->sx*dy - l->sy*dx;
}
NO_INLINE void _jswrap_drawImageLayerStartX(GfxDrawImageLayer *l) {
l->qx = l->px;
l->qy = l->py;
}
ALWAYS_INLINE void _jswrap_drawImageLayerNextX(GfxDrawImageLayer *l) {
l->qx += l->sx;
l->qy -= l->sy;
}
// Handle repeats
ALWAYS_INLINE void _jswrap_drawImageLayerNextXRepeat(GfxDrawImageLayer *l) {
if (l->repeat) {
// for the range we're in, it's quicker/easier than modulo
if (l->qx < 0) l->qx += l->mx;
if (l->qx >= l->mx) l->qx -= l->mx;
if (l->qy < 0) l->qy += l->my;
if (l->qy >= l->my) l->qy -= l->my;
}
}
NO_INLINE void _jswrap_drawImageLayerNextY(GfxDrawImageLayer *l) {
l->px += l->sy;
l->py += l->sx;
if (l->repeat) {
// for the range we're in, it's quicker/easier than modulo
if (l->px < 0) l->px += l->mx;
if (l->px >= l->mx) l->px -= l->mx;
if (l->py < 0) l->py += l->my;
if (l->py >= l->my) l->py -= l->my;
}
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawImage",
"generate" : "jswrap_graphics_drawImage",
"params" : [
["image","JsVar","An image to draw, either a String or an Object (see below)"],
["x","int32","The X offset to draw the image"],
["y","int32","The Y offset to draw the image"],
["options","JsVar","options for scaling,rotation,etc (see below)"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Image can be:
* An object with the following fields `{ width : int, height : int, bpp : optional int, buffer : ArrayBuffer/String, transparent: optional int, palette : optional Uint16Array(2/4/16) }`. bpp = bits per pixel (default is 1), transparent (if defined) is the colour that will be treated as transparent, and palette is a color palette that each pixel will be looked up in first
* A String where the the first few bytes are: `width,height,bpp,[transparent,]image_bytes...`. If a transparent colour is specified the top bit of `bpp` should be set.
Draw an image at the specified position.
* If the image is 1 bit, the graphics foreground/background colours will be used.
* If `img.palette` is a Uint16Array or 2/4/16 elements, color data will be looked from the supplied palette
* On Bangle.js, 2 bit images blend from background(0) to foreground(1) colours
* On Bangle.js, 4 bit images use the Apple Mac 16 color palette
* On Bangle.js, 8 bit images use the Web Safe 216 color palette
* Otherwise color data will be copied as-is. Bitmaps are rendered MSB-first
If `options` is supplied, `drawImage` will allow images to be rendered at any scale or angle. If `options.rotate` is set it will
center images at `x,y`. `options` must be an object of the form:
```
{
rotate : float, // the amount to rotate the image in radians (default 0)
scale : float, // the amount to scale the image up (default 1)
}
```
For example:
```
// In the top left of the screen
g.drawImage(img,0,0);
// In the top left of the screen, twice as big
g.drawImage(img,0,0,{scale:2});
// In the center of the screen, twice as big, 45 degrees
g.drawImage(img, g.getWidth()/2, g.getHeight()/2,
{scale:2, rotate:Math.PI/4});
```
*/
JsVar *jswrap_graphics_drawImage(JsVar *parent, JsVar *image, int xPos, int yPos, JsVar *options) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
GfxDrawImageInfo img;
if (!_jswrap_graphics_parseImage(&gfx, image, &img))
return 0;
int x=0, y=0;
int bits=0;
unsigned int colData = 0;
JsvStringIterator it;
jsvStringIteratorNew(&it, img.buffer, (size_t)img.bufferOffset);
#ifdef USE_LCD_ST7789_8BIT // can we blit directly to the display?
bool isST7789 =
gfx.data.type==JSGRAPHICSTYPE_ST7789_8BIT && // it's the display
(gfx.data.flags & JSGRAPHICSFLAGS_MAPPEDXY)==0 && // no messing with coordinates
gfx.data.bpp==16 && // normal BPP
(img.bpp==8 || img.bpp==1) && // image bpp is handled by fast path
!img.isTransparent; // not transparent
#endif
if (jsvIsUndefined(options)) {
// Standard 1:1 blitting
#ifdef USE_LCD_ST7789_8BIT // can we blit directly to the display?
if (isST7789 &&
xPos>=gfx.data.clipRect.x1 && yPos>=gfx.data.clipRect.y1 && // check it's all on-screen
(xPos+img.width)<=gfx.data.clipRect.x2 && (yPos+img.height)<=gfx.data.clipRect.y2) {
if (img.bpp==1) lcdST7789_blit1Bit(xPos, yPos, img.width, img.height, 1, &it, img.palettePtr);
else if (img.bpp==8) lcdST7789_blit8Bit(xPos, yPos, img.width, img.height, 1, &it, img.palettePtr);
} else {
#else
{
#endif
JsGraphicsSetPixelFn setPixel = graphicsGetSetPixelUnclippedFn(&gfx, xPos, yPos, xPos+img.width-1, yPos+img.height-1);
for (y=yPos;y<yPos+img.height;y++) {
for (x=xPos;x<xPos+img.width;x++) {
// Get the data we need...
while (bits < img.bpp) {
colData = (colData<<8) | ((unsigned char)jsvStringIteratorGetCharAndNext(&it));
bits += 8;
}
// extract just the bits we want
unsigned int col = (colData>>(bits-img.bpp))&img.bitMask;
bits -= img.bpp;
// Try and write pixel!
if (img.transparentCol!=col) {
if (img.palettePtr) col = img.palettePtr[col&img.paletteMask];
setPixel(&gfx, x, y, col);
}
}
}
}
} else if (jsvIsObject(options)) {
#ifndef GRAPHICS_DRAWIMAGE_ROTATED
jsExceptionHere(JSET_ERROR,"Image rotation not implemented on this device");
#else
// fancy rotation/scaling
// rotate, scale
double scale = jsvGetFloatAndUnLock(jsvObjectGetChild(options,"scale",0));
if (!isfinite(scale) || scale<=0) scale=1;
double rotate = jsvGetFloatAndUnLock(jsvObjectGetChild(options,"rotate",0));
bool centerImage = isfinite(rotate);
if (!centerImage) rotate = 0;
#ifdef GRAPHICS_FAST_PATHS
bool fastPath =
(!centerImage) && // not rotating
(scale-floor(scale))==0 && // integer scale
(gfx.data.flags & JSGRAPHICSFLAGS_MAPPEDXY)==0; // no messing with coordinates
if (fastPath) { // fast path for non-rotated, integer scale
int s = (int)scale;
// Scaled blitting
/* Output as scanlines rather than small fillrects so
* that on direct-coupled displays we can optimise away
* coordinate setting
*/
#ifdef USE_LCD_ST7789_8BIT // can we blit directly to the display?
if (isST7789 &&
s>=1 &&
xPos>=gfx.data.clipRect.x1 && yPos>=gfx.data.clipRect.y1 && // check it's all on-screen
(xPos+img.width*s)<=gfx.data.clipRect.x2 && (yPos+img.height*s)<=gfx.data.clipRect.y2) {
if (img.bpp==1) lcdST7789_blit1Bit(xPos, yPos, img.width, img.height, s, &it, img.palettePtr);
else lcdST7789_blit8Bit(xPos, yPos, img.width, img.height, s, &it, img.palettePtr);
} else
#endif
{
int yp = yPos;
for (y=0;y<img.height;y++) {
// Store current pos as we need to rewind
size_t lastIt = jsvStringIteratorGetIndex(&it);
int lastBits = bits;
unsigned int lastColData = colData;
// do a new iteration for each line we're scaling
for (int iy=0;iy<s;iy++) {
if (iy) { // rewind for all but the first line of scaling
jsvStringIteratorGoto(&it, img.buffer, lastIt);
bits = lastBits;
colData = lastColData;
}
// iterate over x
int xp = xPos;
for (x=0;x<img.width;x++) {
// Get the data we need...
while (bits < img.bpp) {
colData = (colData<<8) | ((unsigned char)jsvStringIteratorGetCharAndNext(&it));
bits += 8;
}
// extract just the bits we want
unsigned int col = (colData>>(bits-img.bpp))&img.bitMask;
bits -= img.bpp;
// Try and write pixel!
if (img.transparentCol!=col && yp>=gfx.data.clipRect.y1 && yp<=gfx.data.clipRect.y2) {
if (img.palettePtr) col = img.palettePtr[col&img.paletteMask];
for (int ix=0;ix<s;ix++) {
if (xp>=gfx.data.clipRect.x1 && xp<=gfx.data.clipRect.x2)
gfx.setPixel(&gfx, xp, yp, col);
xp++;
}
} else xp += s;
}
yp++;
}
}
// update modified area since we went direct
int x1=xPos, y1=yPos, x2=xPos+s*img.width, y2=yPos+s*img.height;
graphicsSetModifiedAndClip(&gfx,&x1,&y1,&x2,&y2);
}
} else { // handle rotation, and default to center the image
#else
if (true) {
#endif
GfxDrawImageLayer l;
l.x1 = xPos;
l.y1 = yPos;
l.img = img;
l.it = it;
l.rotate = rotate;
l.scale = scale;
l.center = centerImage;
l.repeat = false;
_jswrap_drawImageLayerInit(&l);
int x1=l.x1, y1=l.y1, x2=l.x2-1, y2=l.y2-1;
graphicsSetModifiedAndClip(&gfx, &x1, &y1, &x2, &y2);
_jswrap_drawImageLayerSetStart(&l, x1, y1);
JsGraphicsSetPixelFn setPixel = graphicsGetSetPixelFn(&gfx);
// scan across image
for (y = y1; y <= y2; y++) {
_jswrap_drawImageLayerStartX(&l);
for (x = x1; x <= x2 ; x++) {
if (_jswrap_drawImageLayerGetPixel(&l, &colData))
setPixel(&gfx, x, y, colData);
_jswrap_drawImageLayerNextX(&l);
}
_jswrap_drawImageLayerNextY(&l);
}
it = l.it; // make sure it gets freed properly
}
#endif
}
jsvStringIteratorFree(&it);
jsvUnLock(img.buffer);
graphicsSetVar(&gfx); // gfx data changed because modified area
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "drawImages",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_drawImages",
"params" : [
["layers","JsVar","An array of objects {x,y,image,scale,rotate,center} (up to 3)"],
["options","JsVar","options for rendering - see below"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Draws multiple images *at once* - which avoids flicker on unbuffered systems
like Bangle.js. Maximum layer count right now is 4.
```
layers = [ {
{x : int, // x start position
y : int, // y start position
image : string/object,
scale : float, // scale factor, default 1
rotate : float, // angle in radians
center : bool // center on x,y? default is top left
repeat : should this image be repeated (tiled?)
nobounds : bool // if true, the bounds of the image are not used to work out the default area to draw
}
]
options = { // the area to render. Defaults to rendering just enough to cover what's requested
x,y,
width,height
}
```
*/
JsVar *jswrap_graphics_drawImages(JsVar *parent, JsVar *layersVar, JsVar *options) {
const int MAXIMAGES = 4;
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
GfxDrawImageLayer layers[MAXIMAGES];
int i,layerCount;
if (!(jsvIsArray(layersVar) && (layerCount=jsvGetArrayLength(layersVar))<=MAXIMAGES)) {
jsExceptionHere(JSET_TYPEERROR,"Expecting array for first argument with <%d entries", MAXIMAGES);
return 0;
}
// default bounds (=nothing)
int x=10000,y=10000;
int width=10000;
int height=10000;
// now run through all layers getting stuff ready and checking
bool ok = true;
for (i=0;i<layerCount;i++) {
JsVar *layer = jsvGetArrayItem(layersVar, i);
if (jsvIsObject(layer)) {
JsVar *image = jsvObjectGetChild(layer,"image",0);
if (_jswrap_graphics_parseImage(&gfx, image, &layers[i].img)) {
layers[i].x1 = jsvGetIntegerAndUnLock(jsvObjectGetChild(layer,"x",0));
layers[i].y1 = jsvGetIntegerAndUnLock(jsvObjectGetChild(layer,"y",0));
// rotate, scale
layers[i].scale = jsvGetFloatAndUnLock(jsvObjectGetChild(layer,"scale",0));
if (!isfinite(layers[i].scale) || layers[i].scale<=0)
layers[i].scale=1;
layers[i].rotate = jsvGetFloatAndUnLock(jsvObjectGetChild(layer,"rotate",0));
if (!isfinite(layers[i].rotate)) layers[i].rotate=0;
layers[i].center = jsvGetBoolAndUnLock(jsvObjectGetChild(layer,"center",0));
layers[i].repeat = jsvGetBoolAndUnLock(jsvObjectGetChild(layer,"repeat",0));
_jswrap_drawImageLayerInit(&layers[i]);
// add the calculated bounds to our default bounds
if (!jsvGetBoolAndUnLock(jsvObjectGetChild(layer,"nobounds",0))) {
if (layers[i].x1<x) x=layers[i].x1;
if (layers[i].y1<y) y=layers[i].y1;
if (layers[i].x2>x+width) width=layers[i].x2-x;
if (layers[i].y2>y+height) height=layers[i].y2-y;
}
} else ok = false;
jsvUnLock(image);
} else ok = false;
jsvUnLock(layer);
}
jsvConfigObject configs[] = {
{"x", JSV_INTEGER, &x},
{"y", JSV_INTEGER, &y},
{"width", JSV_INTEGER, &width},
{"height", JSV_INTEGER, &height}
};
if (!jsvReadConfigObject(options, configs, sizeof(configs) / sizeof(jsvConfigObject)))
ok = false;
int x2 = x+width-1, y2 = y+height-1;
graphicsSetModifiedAndClip(&gfx, &x, &y, &x2, &y2);
JsGraphicsSetPixelFn setPixel = graphicsGetSetPixelFn(&gfx);
// If all good, start rendering!
if (ok) {
for (i=0;i<layerCount;i++) {
jsvStringIteratorNew(&layers[i].it, layers[i].img.buffer, (size_t)layers[i].img.bufferOffset);
_jswrap_drawImageLayerSetStart(&layers[i], x, y);
}
// scan across image
for (int yi = y; yi <= y2; yi++) {
for (i=0;i<layerCount;i++)
_jswrap_drawImageLayerStartX(&layers[i]);
for (int xi = x; xi <= x2 ; xi++) {
// scan backwards until we hit a 'solid' pixel
bool solid = false;
unsigned int colData = 0;
for (i=layerCount-1;i>=0;i--) {
if (_jswrap_drawImageLayerGetPixel(&layers[i], &colData)) {
solid = true;
break;
}
}
// if nontransparent, draw it!
if (solid)
setPixel(&gfx, xi, yi, colData);
// next in layers!
for (i=0;i<layerCount;i++) {
_jswrap_drawImageLayerNextX(&layers[i]);
_jswrap_drawImageLayerNextXRepeat(&layers[i]);
}
}
for (i=0;i<layerCount;i++)
_jswrap_drawImageLayerNextY(&layers[i]);
}
for (i=0;i<layerCount;i++)
jsvStringIteratorFree(&layers[i].it);
}
// tidy up
for (i=0;i<layerCount;i++) {
jsvUnLock(layers[i].img.buffer);
}
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "asImage",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_asImage",
"params" : [
["type","JsVar","The type of image to return. Either `object`/undefined to return an image object, or `string` to return an image string"]
],
"return" : ["JsVar","An Image that can be used with `Graphics.drawImage`"]
}
Return this Graphics object as an Image that can be used with `Graphics.drawImage`.
Check out [the Graphics reference page](http://www.espruino.com/Graphics#images-bitmaps)
for more information on images.
Will return undefined if data can't be allocated for the image.
The image data itself will be referenced rather than copied if:
* An image `object` was requested (not `string`)
* The Graphics instance was created with `Graphics.createArrayBuffer`
* Is 8 bpp *OR* the `{msb:true}` option was given
* No other format options (zigzag/etc) were given
Otherwise data will be copied, which takes up more space and
may be quite slow.
*/
JsVar *jswrap_graphics_asImage(JsVar *parent, JsVar *imgType) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
bool isObject;
if (jsvIsUndefined(imgType) || jsvIsStringEqual(imgType,"object"))
isObject = true;
else if (jsvIsStringEqual(imgType,"string")) {
isObject = false;
} else {
jsExceptionHere(JSET_ERROR, "Unknown image type %j", imgType);
return 0;
}
int w = jswrap_graphics_getWidthOrHeight(parent,false);
int h = jswrap_graphics_getWidthOrHeight(parent,true);
int bpp = gfx.data.bpp;
int len = (w*h*bpp+7)>>3;
JsVar *img = 0;
if (isObject) {
img = jsvNewObject();
if (!img) return 0;
jsvObjectSetChildAndUnLock(img,"width",jsvNewFromInteger(w));
jsvObjectSetChildAndUnLock(img,"height",jsvNewFromInteger(h));
if (bpp!=1) jsvObjectSetChildAndUnLock(img,"bpp",jsvNewFromInteger(bpp));
/* IF we have an arraybuffer of the right form then
we can return the original buffer directly */
if (gfx.data.type == JSGRAPHICSTYPE_ARRAYBUFFER &&
(bpp==8 || // 8 bit data is fine
((gfx.data.flags & JSGRAPHICSFLAGS_ARRAYBUFFER_MSB) && // must be MSB first
!(gfx.data.flags & JSGRAPHICSFLAGS_NONLINEAR)))) { // must be in-order
jsvObjectSetChildAndUnLock(img,"buffer",jsvObjectGetChild(gfx.graphicsVar, "buffer", 0));
return img;
}
} else {
len += 3; // for the header!
}
JsVar *buffer = jsvNewStringOfLength((unsigned)len, NULL);
if (!buffer) { // not enough memory
jsvUnLock(img);
return 0;
}
int x=0, y=0;
unsigned int pixelBits = 0;
unsigned int pixelBitCnt = 0;
JsvStringIterator it;
jsvStringIteratorNew(&it, buffer, 0);
if (!isObject) { // if not an object, add the header
jsvStringIteratorSetCharAndNext(&it, (char)(uint8_t)w);
jsvStringIteratorSetCharAndNext(&it, (char)(uint8_t)h);
jsvStringIteratorSetCharAndNext(&it, (char)(uint8_t)bpp);
}
while (jsvStringIteratorHasChar(&it)) {
pixelBits = (pixelBits<<bpp) | graphicsGetPixel(&gfx, x, y);
pixelBitCnt += (unsigned)bpp;
x++;
if (x>=w) {
x=0;
y++;
}
while (pixelBitCnt>=8) {
jsvStringIteratorSetCharAndNext(&it, (char)(pixelBits>>(pixelBitCnt-8)));
pixelBitCnt -= 8;
}
}
jsvStringIteratorFree(&it);
if (isObject) {
jsvObjectSetChildAndUnLock(img,"buffer",buffer);
return img;
} else
return buffer;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "getModified",
"ifndef" : "SAVE_ON_FLASH",
"generate" : "jswrap_graphics_getModified",
"params" : [
["reset","bool","Whether to reset the modified area or not"]
],
"return" : ["JsVar","An object {x1,y1,x2,y2} containing the modified area, or undefined if not modified"]
}
Return the area of the Graphics canvas that has been modified, and optionally clear
the modified area to 0.
For instance if `g.setPixel(10,20)` was called, this would return `{x1:10, y1:20, x2:10, y2:20}`
*/
JsVar *jswrap_graphics_getModified(JsVar *parent, bool reset) {
#ifndef NO_MODIFIED_AREA
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
JsVar *obj = 0;
if (gfx.data.modMinX <= gfx.data.modMaxX) { // do we have a rect?
obj = jsvNewObject();
if (obj) {
jsvObjectSetChildAndUnLock(obj, "x1", jsvNewFromInteger(gfx.data.modMinX));
jsvObjectSetChildAndUnLock(obj, "y1", jsvNewFromInteger(gfx.data.modMinY));
jsvObjectSetChildAndUnLock(obj, "x2", jsvNewFromInteger(gfx.data.modMaxX));
jsvObjectSetChildAndUnLock(obj, "y2", jsvNewFromInteger(gfx.data.modMaxY));
}
}
if (reset) {
gfx.data.modMaxX = -32768;
gfx.data.modMaxY = -32768;
gfx.data.modMinX = 32767;
gfx.data.modMinY = 32767;
graphicsSetVar(&gfx);
}
return obj;
#else
return 0;
#endif
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "scroll",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_scroll",
"params" : [
["x","int32","X direction. >0 = to right"],
["y","int32","Y direction. >0 = down"]
],
"return" : ["JsVar","The instance of Graphics this was called on, to allow call chaining"],
"return_object" : "Graphics"
}
Scroll the contents of this graphics in a certain direction. The remaining area
is filled with the background color.
Note: This uses repeated pixel reads and writes, so will not work on platforms that
don't support pixel reads.
*/
JsVar *jswrap_graphics_scroll(JsVar *parent, int xdir, int ydir) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
graphicsScroll(&gfx, xdir, ydir);
// update modified area
graphicsSetVar(&gfx);
return jsvLockAgain(parent);
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "asBMP",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_asBMP",
"return" : ["JsVar","A String representing the Graphics as a Windows BMP file (or 'undefined' if not possible)"]
}
Create a Windows BMP file from this Graphics instance, and return it as a String.
*/
JsVar *jswrap_graphics_asBMP(JsVar *parent) {
JsGraphics gfx; if (!graphicsGetFromVar(&gfx, parent)) return 0;
if (gfx.data.bpp!=1 && gfx.data.bpp!=24) {
jsExceptionHere(JSET_ERROR, "asBMP/asURL only works on 1bpp/24bpp Graphics");
return 0;
}
int width = graphicsGetWidth(&gfx);
int height = graphicsGetHeight(&gfx);
int rowstride = (((width*gfx.data.bpp)+31) >> 5) << 2; // padded to 32 bits
bool hasPalette = gfx.data.bpp==1;
int headerLen = 14+ 12+ (hasPalette?6:0);
int l = headerLen + height*rowstride;
JsVar *imgData = jsvNewFlatStringOfLength((unsigned)l);
if (!imgData) return 0; // not enough memory
unsigned char *imgPtr = (unsigned char *)jsvGetFlatStringPointer(imgData);
imgPtr[0]=66;
imgPtr[1]=77;
imgPtr[2]=(unsigned char)l;
imgPtr[3]=(unsigned char)(l>>8); // plus 2 more bytes for size
imgPtr[10]=(unsigned char)headerLen;
// BITMAPCOREHEADER
imgPtr[14]=12; // sizeof(BITMAPCOREHEADER)
imgPtr[18]=(unsigned char)width;
imgPtr[19]=(unsigned char)(width>>8);
imgPtr[20]=(unsigned char)height;
imgPtr[21]=(unsigned char)(height>>8);
imgPtr[22]=1;
imgPtr[24]=(unsigned char)gfx.data.bpp; // bpp
if (hasPalette) {
imgPtr[26]=255;
imgPtr[27]=255;
imgPtr[28]=255;
}
for (int y=0;y<height;y++) {
int yi = height-(y+1);
if (gfx.data.bpp==1) {
for (int x=0;x<width;) {
unsigned int b = 0;
for (int i=0;i<8;i++) {
b = (b<<1)|(graphicsGetPixel(&gfx, x++, y)&1);
}
imgPtr[headerLen + (yi*rowstride) + (x>>3) - 1] = (unsigned char)b;
}
} else {
for (int x=0;x<width;x++) {
unsigned int c = graphicsGetPixel(&gfx, x, y);
int i = headerLen + (yi*rowstride) + (x*(gfx.data.bpp>>3));
imgPtr[i++] = (unsigned char)(c);
imgPtr[i++] = (unsigned char)(c>>8);
imgPtr[i++] = (unsigned char)(c>>16);
}
}
}
return imgData;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "asURL",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_asURL",
"return" : ["JsVar","A String representing the Graphics as a URL (or 'undefined' if not possible)"]
}
Create a URL of the form `data:image/bmp;base64,...` that can be pasted into the browser.
The Espruino Web IDE can detect this data on the console and render the image inline automatically.
*/
JsVar *jswrap_graphics_asURL(JsVar *parent) {
JsVar *imgData = jswrap_graphics_asBMP(parent);
if (!imgData) return 0; // not enough memory
JsVar *b64 = jswrap_btoa(imgData);
jsvUnLock(imgData);
if (!b64) return 0; // not enough memory
JsVar *r = jsvVarPrintf("data:image/bmp;base64,%v",b64);
jsvUnLock(b64);
return r;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "dump",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_dump"
}
Output this image as a bitmap URL. The Espruino Web IDE can detect the data on the console and render the image inline automatically.
This is identical to `console.log(g.asURL())` - it is just a convenient function for easy debugging.
*/
void jswrap_graphics_dump(JsVar *parent) {
JsVar *url = jswrap_graphics_asURL(parent);
if (url) jsiConsolePrintStringVar(url);
jsvUnLock(url);
jsiConsolePrint("\n");
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "quadraticBezier",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_quadraticBezier",
"params" : [
["arr","JsVar","An array of three vertices, six enties in form of ```[x0,y0,x1,y1,x2,y2]```"],
["options","JsVar","number of points to calulate"]
],
"return" : ["JsVar", "Array with calculated points" ]
}
Calculate the square area under a Bezier curve.
x0,y0: start point
x1,y1: control point
y2,y2: end point
Max 10 points without start point.
*/
JsVar *jswrap_graphics_quadraticBezier( JsVar *parent, JsVar *arr, JsVar *options ){
NOT_USED(parent);
JsVar *result = jsvNewEmptyArray();
if (!result) return 0;
if (jsvGetArrayLength(arr) != 6) return result;
int sn = 5;
typedef struct { int x,y; } XY;
XY xy[3];
int count = 0;
JsvIterator it;
jsvIteratorNew(&it, arr, JSIF_EVERY_ARRAY_ELEMENT);
for (int i=0;i<6;i++) {
((int*)xy)[i] = jsvIteratorGetIntegerValue(&it);
jsvIteratorNext(&it);
}
jsvIteratorFree(&it);
if (jsvIsObject(options)) count = jsvGetIntegerAndUnLock(jsvObjectGetChild(options,"count",0));
const int FP_MUL = 4096;
const int FP_SHIFT = 12;
int dx = xy[0].x - xy[2].x;
if (dx<0) dx=-dx;
int dy = xy[0].y - xy[2].y;
if (dy<0) dy=-dy;
int dmin = (dx < dy) ? dx : dy;
if (dmin==0) dmin=1;
int s = FP_MUL*sn / dmin;
if ( s >= FP_MUL) s = FP_MUL/3;
if ( s < FP_MUL/10) s = FP_MUL/10;
if (count > 0) s = FP_MUL / count;
jsvArrayPush2Int(result, xy[0].x, xy[0].y);
for ( int t = s; t <= FP_MUL; t += s ) {
int t2 = (t*t) >> FP_SHIFT;
int tp2 = ((FP_MUL - t) * (FP_MUL - t)) >> FP_SHIFT;
int tpt = (2 * (FP_MUL - t) * t) >> FP_SHIFT;
jsvArrayPush2Int(result,
(xy[0].x * tp2 + xy[1].x * tpt + xy[2].x * t2 + (FP_MUL/2)) >> FP_SHIFT,
(xy[0].y * tp2 + xy[1].y * tpt + xy[2].y * t2 + (FP_MUL/2)) >> FP_SHIFT);
}
jsvArrayPush2Int(result, xy[2].x, xy[2].y);
return result;
}
/*JSON{
"type" : "method",
"class" : "Graphics",
"name" : "transformVertices",
"#if" : "!defined(SAVE_ON_FLASH) && !defined(ESPRUINOBOARD)",
"generate" : "jswrap_graphics_transformVertices",
"params" : [
["verts","JsVar","An array of vertices, of the form ```[x1,y1,x2,y2,x3,y3,etc]```"],
["transformation","JsVar","The transformation to apply, either an Object or an Array (see below)"]
],
"return" : ["JsVar", "Array of transformed vertices" ]
}
Transformation can be:
* An object of the form
```
{
x: float, // x offset (default 0)
y: float, // y offset (default 0)
scale: float, // scale factor (default 1)
rotate: float, // angle in radians (default 0)
}
```
* A six-element array of the form `[a,b,c,d,e,f]`, which represents the 2D transformation matrix
```
a c e
b d f
0 0 1
```
Apply a transformation to an array of vertices.
*/
JsVar *jswrap_graphics_transformVertices(JsVar *parent, JsVar *verts, JsVar *transformation) {
NOT_USED(parent);
JsVar *result = jsvNewEmptyArray();
if (!result) return 0;
if (!jsvIsIterable(verts)) return result;
double m[6];
if (jsvIsObject(transformation)) {
double x=0, y=0, scale=1, rotate=0;
jsvConfigObject configs[] = {
{"x", JSV_FLOAT, &x},
{"y", JSV_FLOAT, &y},
{"scale", JSV_FLOAT, &scale},
{"rotate", JSV_FLOAT, &rotate}
};
if (!jsvReadConfigObject(transformation, configs, sizeof(configs) / sizeof(jsvConfigObject)))
return result;
double cosr = 1, sinr = 0;
if (rotate) {
cosr = cos(rotate);
sinr = sin(rotate);
}
m[0] = cosr*scale; m[2] = -sinr*scale; m[4] = x;
m[1] = sinr*scale; m[3] = cosr*scale; m[5] = y;
} else if (jsvIsIterable(transformation) && jsvGetLength(transformation) == 6) {
JsvIterator it;
jsvIteratorNew(&it, transformation, JSIF_EVERY_ARRAY_ELEMENT);
for (int i = 0; i < 6; ++i) {
m[i] = jsvIteratorGetFloatValue(&it);
jsvIteratorNext(&it);
}
jsvIteratorFree(&it);
} else {
jsExceptionHere(JSET_TYPEERROR,"Expected either an object or an array with 6 entries for second argument");
return 0;
}
JsvIterator it;
jsvIteratorNew(&it, verts, JSIF_EVERY_ARRAY_ELEMENT);
while (jsvIteratorHasElement(&it)) {
double x = jsvIteratorGetFloatValue(&it);
jsvIteratorNext(&it);
if (!jsvIteratorHasElement(&it)) break;
double y = jsvIteratorGetFloatValue(&it);
jsvIteratorNext(&it);
jsvArrayPushAndUnLock(result, jsvNewFromFloat(m[0]*x + m[2]*y + m[4]));
jsvArrayPushAndUnLock(result, jsvNewFromFloat(m[1]*x + m[3]*y + m[5]));
}
jsvIteratorFree(&it);
return result;
}
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