ZenBrowserMirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/zen-browser/pdf.js.git synced 2025-07-10 02:05:37 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Implements WebGL support

Browse source
This commit is contained in:
Yury Delendik 2014-02-13 08:44:58 -06:00
parent 944219ad8a
commit f57c6935d7
12 changed files with 517 additions and 34 deletions
Download patch file Download diff file Expand all files Collapse all files

68
src/display/pattern_helper.js
View file

@ -15,7 +15,7 @@
* limitations under the License.
*/
/* globals CanvasGraphics, CachedCanvases, ColorSpace, Util, error, info,
isArray, makeCssRgb */
isArray, makeCssRgb, WebGLUtils */
'use strict';
@ -155,39 +155,59 @@ var createMeshCanvas = (function createMeshCanvasClosure() {
// MAX_PATTERN_SIZE is used to avoid OOM situation.
var MAX_PATTERN_SIZE = 3000; // 10in @ 300dpi shall be enough
var boundsWidth = bounds[2] - bounds[0];
var boundsHeight = bounds[3] - bounds[1];
var offsetX = Math.floor(bounds[0]);
var offsetY = Math.floor(bounds[1]);
var boundsWidth = Math.ceil(bounds[2]) - offsetX;
var boundsHeight = Math.ceil(bounds[3]) - offsetY;
var width = Math.min(Math.ceil(Math.abs(boundsWidth * combinesScale[0] *
EXPECTED_SCALE)), MAX_PATTERN_SIZE);
var height = Math.min(Math.ceil(Math.abs(boundsHeight * combinesScale[1] *
EXPECTED_SCALE)), MAX_PATTERN_SIZE);
var scaleX = width / boundsWidth;
var scaleY = height / boundsHeight;
var tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
var tmpCtx = tmpCanvas.context;
if (backgroundColor) {
tmpCtx.fillStyle = makeCssRgb(backgroundColor);
tmpCtx.fillRect(0, 0, width, height);
}
var scaleX = boundsWidth / width;
var scaleY = boundsHeight / height;
var context = {
coords: coords,
colors: colors,
offsetX: -bounds[0],
offsetY: -bounds[1],
scaleX: scaleX,
scaleY: scaleY
offsetX: -offsetX,
offsetY: -offsetY,
scaleX: 1 / scaleX,
scaleY: 1 / scaleY
};
var data = tmpCtx.getImageData(0, 0, width, height);
for (var i = 0; i < figures.length; i++) {
drawFigure(data, figures[i], context);
}
tmpCtx.putImageData(data, 0, 0);
var canvas;
if (WebGLUtils.isEnabled) {
canvas = WebGLUtils.drawFigures(width, height, backgroundColor,
figures, context);
return {canvas: tmpCanvas.canvas, scaleX: 1 / scaleX, scaleY: 1 / scaleY};
// https://bugzilla.mozilla.org/show_bug.cgi?id=972126
var tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
tmpCanvas.context.drawImage(canvas, 0, 0);
canvas = tmpCanvas.canvas;
} else {
var tmpCanvas = CachedCanvases.getCanvas('mesh', width, height, false);
var tmpCtx = tmpCanvas.context;
var data = tmpCtx.createImageData(width, height);
if (backgroundColor) {
var bytes = data.data;
for (var i = 0, ii = bytes.length; i < ii; i += 4) {
bytes[i] = backgroundColor[0];
bytes[i + 1] = backgroundColor[1];
bytes[i + 2] = backgroundColor[2];
bytes[i + 3] = 255;
}
}
for (var i = 0; i < figures.length; i++) {
drawFigure(data, figures[i], context);
}
tmpCtx.putImageData(data, 0, 0);
canvas = tmpCanvas.canvas;
}
return {canvas: canvas, offsetX: offsetX, offsetY: offsetY,
scaleX: scaleX, scaleY: scaleY};
}
return createMeshCanvas;
})();
@ -221,7 +241,6 @@ ShadingIRs.Mesh = {
// Rasterizing on the main thread since sending/queue large canvases
// might cause OOM.
// TODO consider using WebGL or asm.js to perform rasterization
var temporaryPatternCanvas = createMeshCanvas(bounds, combinedScale,
coords, colors, figures, shadingFill ? null : background);
@ -232,7 +251,8 @@ ShadingIRs.Mesh = {
}
}
ctx.translate(bounds[0], bounds[1]);
ctx.translate(temporaryPatternCanvas.offsetX,
temporaryPatternCanvas.offsetY);
ctx.scale(temporaryPatternCanvas.scaleX,
temporaryPatternCanvas.scaleY);