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Implements WebGL support

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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
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37
src/display/canvas.js
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@ -17,7 +17,8 @@
/* globals ColorSpace, DeviceCmykCS, DeviceGrayCS, DeviceRgbCS, error, PDFJS,
FONT_IDENTITY_MATRIX, Uint32ArrayView, IDENTITY_MATRIX, ImageData,
ImageKind, isArray, isNum, TilingPattern, OPS, Promise, Util, warn,
assert, info, shadow, TextRenderingMode, getShadingPatternFromIR */
assert, info, shadow, TextRenderingMode, getShadingPatternFromIR,
WebGLUtils */
'use strict';
@ -601,15 +602,10 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
}
function composeSMask(ctx, smask, layerCtx) {
var mask = smask.canvas;
var maskCtx = smask.context;
var width = mask.width, height = mask.height;
function genericComposeSMask(maskCtx, layerCtx, width, height,
subtype, backdrop) {
var addBackdropFn;
if (smask.backdrop) {
var cs = smask.colorSpace || ColorSpace.singletons.rgb;
var backdrop = cs.getRgb(smask.backdrop, 0);
if (backdrop) {
addBackdropFn = function (r0, g0, b0, bytes) {
var length = bytes.length;
for (var i = 3; i < length; i += 4) {
@ -631,7 +627,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
}
var composeFn;
if (smask.subtype === 'Luminosity') {
if (subtype === 'Luminosity') {
composeFn = function (maskDataBytes, layerDataBytes) {
var length = maskDataBytes.length;
for (var i = 3; i < length; i += 4) {
@ -664,9 +660,29 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
maskCtx.putImageData(layerData, 0, row);
}
}
function composeSMask(ctx, smask, layerCtx) {
var mask = smask.canvas;
var maskCtx = smask.context;
ctx.setTransform(smask.scaleX, 0, 0, smask.scaleY,
smask.offsetX, smask.offsetY);
var backdrop;
if (smask.backdrop) {
var cs = smask.colorSpace || ColorSpace.singletons.rgb;
backdrop = cs.getRgb(smask.backdrop, 0);
}
if (WebGLUtils.isEnabled) {
var composed = WebGLUtils.composeSMask(layerCtx.canvas, mask,
{subtype: smask.subtype, backdrop: backdrop});
ctx.setTransform(1, 0, 0, 1, 0, 0);
ctx.drawImage(composed, smask.offsetX, smask.offsetY);
return;
}
genericComposeSMask(maskCtx, layerCtx, mask.width, mask.height,
smask.subtype, backdrop);
ctx.drawImage(mask, 0, 0);
}
@ -784,6 +800,7 @@ var CanvasGraphics = (function CanvasGraphicsClosure() {
endDrawing: function CanvasGraphics_endDrawing() {
this.ctx.restore();
CachedCanvases.clear();
WebGLUtils.clear();
if (this.textLayer) {
this.textLayer.endLayout();