Index: third_party/WebKit/WebCore/html/CanvasRenderingContext2D.cpp |
=================================================================== |
--- third_party/WebKit/WebCore/html/CanvasRenderingContext2D.cpp (revision 9383) |
+++ third_party/WebKit/WebCore/html/CanvasRenderingContext2D.cpp (working copy) |
@@ -1,1461 +1,1460 @@ |
-/* |
- * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
- * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) |
- * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
- * Copyright (C) 2008 Eric Seidel <eric@webkit.org> |
- * Copyright (C) 2008 Dirk Schulze <krit@webkit.org> |
- * |
- * Redistribution and use in source and binary forms, with or without |
- * modification, are permitted provided that the following conditions |
- * are met: |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. Redistributions in binary form must reproduce the above copyright |
- * notice, this list of conditions and the following disclaimer in the |
- * documentation and/or other materials provided with the distribution. |
- * |
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- */ |
- |
-#include "config.h" |
-#include "CanvasRenderingContext2D.h" |
- |
-#include "TransformationMatrix.h" |
-#include "CSSParser.h" |
-#include "CachedImage.h" |
-#include "CanvasGradient.h" |
-#include "CanvasPattern.h" |
-#include "CanvasStyle.h" |
-#include "CSSPropertyNames.h" |
-#include "CSSStyleSelector.h" |
-#include "Document.h" |
-#include "ExceptionCode.h" |
-#include "FloatConversion.h" |
-#include "Frame.h" |
-#include "GraphicsContext.h" |
-#include "HTMLCanvasElement.h" |
-#include "HTMLImageElement.h" |
-#include "HTMLNames.h" |
-#include "ImageBuffer.h" |
-#include "ImageData.h" |
-#include "KURL.h" |
-#include "NotImplemented.h" |
-#include "Page.h" |
-#include "RenderHTMLCanvas.h" |
-#include "SecurityOrigin.h" |
-#include "Settings.h" |
-#include "StrokeStyleApplier.h" |
-#include "TextMetrics.h" |
-#include <stdio.h> |
- |
-#include <wtf/ByteArray.h> |
-#include <wtf/MathExtras.h> |
- |
-using namespace std; |
- |
-namespace WebCore { |
- |
-using namespace HTMLNames; |
- |
-static const char* const defaultFont = "10px sans-serif"; |
- |
- |
-class CanvasStrokeStyleApplier : public StrokeStyleApplier { |
-public: |
- CanvasStrokeStyleApplier(CanvasRenderingContext2D* canvasContext) |
- : m_canvasContext(canvasContext) |
- { |
- } |
- |
- virtual void strokeStyle(GraphicsContext* c) |
- { |
- c->setStrokeThickness(m_canvasContext->lineWidth()); |
- c->setLineCap(m_canvasContext->getLineCap()); |
- c->setLineJoin(m_canvasContext->getLineJoin()); |
- c->setMiterLimit(m_canvasContext->miterLimit()); |
- } |
- |
-private: |
- CanvasRenderingContext2D* m_canvasContext; |
-}; |
- |
- |
- |
-CanvasRenderingContext2D::CanvasRenderingContext2D(HTMLCanvasElement* canvas) |
- : m_canvas(canvas) |
- , m_stateStack(1) |
-{ |
-} |
- |
-void CanvasRenderingContext2D::ref() |
-{ |
- m_canvas->ref(); |
-} |
- |
-void CanvasRenderingContext2D::deref() |
-{ |
- m_canvas->deref(); |
-} |
- |
-void CanvasRenderingContext2D::reset() |
-{ |
- m_stateStack.resize(1); |
- m_stateStack.first() = State(); |
-} |
- |
-CanvasRenderingContext2D::State::State() |
- : m_strokeStyle(CanvasStyle::create("black")) |
- , m_fillStyle(CanvasStyle::create("black")) |
- , m_lineWidth(1) |
- , m_lineCap(ButtCap) |
- , m_lineJoin(MiterJoin) |
- , m_miterLimit(10) |
- , m_shadowBlur(0) |
- , m_shadowColor("black") |
- , m_globalAlpha(1) |
- , m_globalComposite(CompositeSourceOver) |
- , m_invertibleCTM(true) |
- , m_textAlign(StartTextAlign) |
- , m_textBaseline(AlphabeticTextBaseline) |
- , m_unparsedFont(defaultFont) |
- , m_realizedFont(false) |
-{ |
-} |
- |
-void CanvasRenderingContext2D::save() |
-{ |
- ASSERT(m_stateStack.size() >= 1); |
- m_stateStack.append(state()); |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->save(); |
-} |
- |
-void CanvasRenderingContext2D::restore() |
-{ |
- ASSERT(m_stateStack.size() >= 1); |
- if (m_stateStack.size() <= 1) |
- return; |
- m_path.transform(state().m_transform); |
- m_stateStack.removeLast(); |
- m_path.transform(state().m_transform.inverse()); |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->restore(); |
-} |
- |
-CanvasStyle* CanvasRenderingContext2D::strokeStyle() const |
-{ |
- return state().m_strokeStyle.get(); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeStyle(PassRefPtr<CanvasStyle> style) |
-{ |
- if (!style) |
- return; |
- |
- if (m_canvas->originClean()) { |
- if (CanvasPattern* pattern = style->canvasPattern()) { |
- if (!pattern->originClean()) |
- m_canvas->setOriginTainted(); |
- } |
- } |
- |
- state().m_strokeStyle = style; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- state().m_strokeStyle->applyStrokeColor(c); |
-} |
- |
-CanvasStyle* CanvasRenderingContext2D::fillStyle() const |
-{ |
- return state().m_fillStyle.get(); |
-} |
- |
-void CanvasRenderingContext2D::setFillStyle(PassRefPtr<CanvasStyle> style) |
-{ |
- if (!style) |
- return; |
- |
- if (m_canvas->originClean()) { |
- if (CanvasPattern* pattern = style->canvasPattern()) { |
- if (!pattern->originClean()) |
- m_canvas->setOriginTainted(); |
- } |
- } |
- |
- state().m_fillStyle = style; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- state().m_fillStyle->applyFillColor(c); |
-} |
- |
-float CanvasRenderingContext2D::lineWidth() const |
-{ |
- return state().m_lineWidth; |
-} |
- |
-void CanvasRenderingContext2D::setLineWidth(float width) |
-{ |
- if (!(width > 0)) |
- return; |
- state().m_lineWidth = width; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setStrokeThickness(width); |
-} |
- |
-String CanvasRenderingContext2D::lineCap() const |
-{ |
- return lineCapName(state().m_lineCap); |
-} |
- |
-void CanvasRenderingContext2D::setLineCap(const String& s) |
-{ |
- LineCap cap; |
- if (!parseLineCap(s, cap)) |
- return; |
- state().m_lineCap = cap; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setLineCap(cap); |
-} |
- |
-String CanvasRenderingContext2D::lineJoin() const |
-{ |
- return lineJoinName(state().m_lineJoin); |
-} |
- |
-void CanvasRenderingContext2D::setLineJoin(const String& s) |
-{ |
- LineJoin join; |
- if (!parseLineJoin(s, join)) |
- return; |
- state().m_lineJoin = join; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setLineJoin(join); |
-} |
- |
-float CanvasRenderingContext2D::miterLimit() const |
-{ |
- return state().m_miterLimit; |
-} |
- |
-void CanvasRenderingContext2D::setMiterLimit(float limit) |
-{ |
- if (!(limit > 0)) |
- return; |
- state().m_miterLimit = limit; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setMiterLimit(limit); |
-} |
- |
-float CanvasRenderingContext2D::shadowOffsetX() const |
-{ |
- return state().m_shadowOffset.width(); |
-} |
- |
-void CanvasRenderingContext2D::setShadowOffsetX(float x) |
-{ |
- state().m_shadowOffset.setWidth(x); |
- applyShadow(); |
-} |
- |
-float CanvasRenderingContext2D::shadowOffsetY() const |
-{ |
- return state().m_shadowOffset.height(); |
-} |
- |
-void CanvasRenderingContext2D::setShadowOffsetY(float y) |
-{ |
- state().m_shadowOffset.setHeight(y); |
- applyShadow(); |
-} |
- |
-float CanvasRenderingContext2D::shadowBlur() const |
-{ |
- return state().m_shadowBlur; |
-} |
- |
-void CanvasRenderingContext2D::setShadowBlur(float blur) |
-{ |
- state().m_shadowBlur = blur; |
- applyShadow(); |
-} |
- |
-String CanvasRenderingContext2D::shadowColor() const |
-{ |
- // FIXME: What should this return if you called setShadow with a non-string color? |
- return state().m_shadowColor; |
-} |
- |
-void CanvasRenderingContext2D::setShadowColor(const String& color) |
-{ |
- state().m_shadowColor = color; |
- applyShadow(); |
-} |
- |
-float CanvasRenderingContext2D::globalAlpha() const |
-{ |
- return state().m_globalAlpha; |
-} |
- |
-void CanvasRenderingContext2D::setGlobalAlpha(float alpha) |
-{ |
- if (!(alpha >= 0 && alpha <= 1)) |
- return; |
- state().m_globalAlpha = alpha; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setAlpha(alpha); |
-} |
- |
-String CanvasRenderingContext2D::globalCompositeOperation() const |
-{ |
- return compositeOperatorName(state().m_globalComposite); |
-} |
- |
-void CanvasRenderingContext2D::setGlobalCompositeOperation(const String& operation) |
-{ |
- CompositeOperator op; |
- if (!parseCompositeOperator(operation, op)) |
- return; |
- state().m_globalComposite = op; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- c->setCompositeOperation(op); |
-} |
- |
-void CanvasRenderingContext2D::scale(float sx, float sy) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- TransformationMatrix newTransform = state().m_transform; |
- newTransform.scale(sx, sy); |
- if (!newTransform.isInvertible()) { |
- state().m_invertibleCTM = false; |
- return; |
- } |
- |
- state().m_transform = newTransform; |
- c->scale(FloatSize(sx, sy)); |
- m_path.transform(TransformationMatrix().scale(1.0/sx, 1.0/sy)); |
-} |
- |
-void CanvasRenderingContext2D::rotate(float angleInRadians) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- TransformationMatrix newTransform = state().m_transform; |
- newTransform.rotate(angleInRadians / piDouble * 180.0); |
- if (!newTransform.isInvertible()) { |
- state().m_invertibleCTM = false; |
- return; |
- } |
- |
- state().m_transform = newTransform; |
- c->rotate(angleInRadians); |
- m_path.transform(TransformationMatrix().rotate(-angleInRadians / piDouble * 180.0)); |
-} |
- |
-void CanvasRenderingContext2D::translate(float tx, float ty) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- TransformationMatrix newTransform = state().m_transform; |
- newTransform.translate(tx, ty); |
- if (!newTransform.isInvertible()) { |
- state().m_invertibleCTM = false; |
- return; |
- } |
- |
- state().m_transform = newTransform; |
- c->translate(tx, ty); |
- m_path.transform(TransformationMatrix().translate(-tx, -ty)); |
-} |
- |
-void CanvasRenderingContext2D::transform(float m11, float m12, float m21, float m22, float dx, float dy) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- // HTML5 3.14.11.1 -- ignore any calls that pass non-finite numbers |
- if (!isfinite(m11) | !isfinite(m21) | !isfinite(dx) | |
- !isfinite(m12) | !isfinite(m22) | !isfinite(dy)) |
- return; |
- |
- TransformationMatrix transform(m11, m12, m21, m22, dx, dy); |
- TransformationMatrix newTransform = transform * state().m_transform; |
- if (!newTransform.isInvertible()) { |
- state().m_invertibleCTM = false; |
- return; |
- } |
- |
- state().m_transform = newTransform; |
- c->concatCTM(transform); |
- m_path.transform(transform.inverse()); |
-} |
- |
-void CanvasRenderingContext2D::setTransform(float m11, float m12, float m21, float m22, float dx, float dy) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- // HTML5 3.14.11.1 -- ignore any calls that pass non-finite numbers |
- if (!isfinite(m11) | !isfinite(m21) | !isfinite(dx) | |
- !isfinite(m12) | !isfinite(m22) | !isfinite(dy)) |
- return; |
- |
- TransformationMatrix ctm = state().m_transform; |
- if (!ctm.isInvertible()) |
- return; |
- c->concatCTM(c->getCTM().inverse()); |
- c->concatCTM(m_canvas->baseTransform()); |
- state().m_transform.multiply(ctm.inverse()); |
- m_path.transform(ctm); |
- |
- state().m_invertibleCTM = true; |
- transform(m11, m12, m21, m22, dx, dy); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(const String& color) |
-{ |
- setStrokeStyle(CanvasStyle::create(color)); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(float grayLevel) |
-{ |
- setStrokeStyle(CanvasStyle::create(grayLevel, 1)); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(const String& color, float alpha) |
-{ |
- setStrokeStyle(CanvasStyle::create(color, alpha)); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(float grayLevel, float alpha) |
-{ |
- setStrokeStyle(CanvasStyle::create(grayLevel, alpha)); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(float r, float g, float b, float a) |
-{ |
- setStrokeStyle(CanvasStyle::create(r, g, b, a)); |
-} |
- |
-void CanvasRenderingContext2D::setStrokeColor(float c, float m, float y, float k, float a) |
-{ |
- setStrokeStyle(CanvasStyle::create(c, m, y, k, a)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(const String& color) |
-{ |
- setFillStyle(CanvasStyle::create(color)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(float grayLevel) |
-{ |
- setFillStyle(CanvasStyle::create(grayLevel, 1)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(const String& color, float alpha) |
-{ |
- setFillStyle(CanvasStyle::create(color, alpha)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(float grayLevel, float alpha) |
-{ |
- setFillStyle(CanvasStyle::create(grayLevel, alpha)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(float r, float g, float b, float a) |
-{ |
- setFillStyle(CanvasStyle::create(r, g, b, a)); |
-} |
- |
-void CanvasRenderingContext2D::setFillColor(float c, float m, float y, float k, float a) |
-{ |
- setFillStyle(CanvasStyle::create(c, m, y, k, a)); |
-} |
- |
-void CanvasRenderingContext2D::beginPath() |
-{ |
- m_path.clear(); |
-} |
- |
-void CanvasRenderingContext2D::closePath() |
-{ |
- m_path.closeSubpath(); |
-} |
- |
-void CanvasRenderingContext2D::moveTo(float x, float y) |
-{ |
- if (!isfinite(x) | !isfinite(y)) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.moveTo(FloatPoint(x, y)); |
-} |
- |
-void CanvasRenderingContext2D::lineTo(float x, float y) |
-{ |
- if (!isfinite(x) | !isfinite(y)) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addLineTo(FloatPoint(x, y)); |
-} |
- |
-void CanvasRenderingContext2D::quadraticCurveTo(float cpx, float cpy, float x, float y) |
-{ |
- if (!isfinite(cpx) | !isfinite(cpy) | !isfinite(x) | !isfinite(y)) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addQuadCurveTo(FloatPoint(cpx, cpy), FloatPoint(x, y)); |
-} |
- |
-void CanvasRenderingContext2D::bezierCurveTo(float cp1x, float cp1y, float cp2x, float cp2y, float x, float y) |
-{ |
- if (!isfinite(cp1x) | !isfinite(cp1y) | !isfinite(cp2x) | !isfinite(cp2y) | !isfinite(x) | !isfinite(y)) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addBezierCurveTo(FloatPoint(cp1x, cp1y), FloatPoint(cp2x, cp2y), FloatPoint(x, y)); |
-} |
- |
-void CanvasRenderingContext2D::arcTo(float x0, float y0, float x1, float y1, float r, ExceptionCode& ec) |
-{ |
- ec = 0; |
- if (!isfinite(x0) | !isfinite(y0) | !isfinite(x1) | !isfinite(y1) | !isfinite(r)) |
- return; |
- |
- if (r < 0) { |
- ec = INDEX_SIZE_ERR; |
- return; |
- } |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addArcTo(FloatPoint(x0, y0), FloatPoint(x1, y1), r); |
-} |
- |
-void CanvasRenderingContext2D::arc(float x, float y, float r, float sa, float ea, bool anticlockwise, ExceptionCode& ec) |
-{ |
- ec = 0; |
- if (!isfinite(x) | !isfinite(y) | !isfinite(r) | !isfinite(sa) | !isfinite(ea)) |
- return; |
- |
- if (r < 0) { |
- ec = INDEX_SIZE_ERR; |
- return; |
- } |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addArc(FloatPoint(x, y), r, sa, ea, anticlockwise); |
-} |
- |
-static bool validateRectForCanvas(float& x, float& y, float& width, float& height) |
-{ |
- if (!isfinite(x) | !isfinite(y) | !isfinite(width) | !isfinite(height)) |
- return false; |
- |
- if (width < 0) { |
- width = -width; |
- x -= width; |
- } |
- |
- if (height < 0) { |
- height = -height; |
- y -= height; |
- } |
- |
- return true; |
-} |
- |
-void CanvasRenderingContext2D::rect(float x, float y, float width, float height) |
-{ |
- if (!validateRectForCanvas(x, y, width, height)) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- m_path.addRect(FloatRect(x, y, width, height)); |
-} |
- |
-#if ENABLE(DASHBOARD_SUPPORT) |
-void CanvasRenderingContext2D::clearPathForDashboardBackwardCompatibilityMode() |
-{ |
- if (Settings* settings = m_canvas->document()->settings()) |
- if (settings->usesDashboardBackwardCompatibilityMode()) |
- m_path.clear(); |
-} |
-#endif |
- |
-void CanvasRenderingContext2D::fill() |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- if (!m_path.isEmpty()) { |
- c->beginPath(); |
- c->addPath(m_path); |
- willDraw(m_path.boundingRect()); |
- c->fillPath(); |
- } |
- |
-#if ENABLE(DASHBOARD_SUPPORT) |
- clearPathForDashboardBackwardCompatibilityMode(); |
-#endif |
-} |
- |
-void CanvasRenderingContext2D::stroke() |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- if (!m_path.isEmpty()) { |
- c->beginPath(); |
- c->addPath(m_path); |
- |
- CanvasStrokeStyleApplier strokeApplier(this); |
- FloatRect boundingRect = m_path.strokeBoundingRect(&strokeApplier); |
- willDraw(boundingRect); |
- |
- c->strokePath(); |
- } |
- |
-#if ENABLE(DASHBOARD_SUPPORT) |
- clearPathForDashboardBackwardCompatibilityMode(); |
-#endif |
-} |
- |
-void CanvasRenderingContext2D::clip() |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- c->clip(m_path); |
-#if ENABLE(DASHBOARD_SUPPORT) |
- clearPathForDashboardBackwardCompatibilityMode(); |
-#endif |
-} |
- |
-bool CanvasRenderingContext2D::isPointInPath(const float x, const float y) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return false; |
- if (!state().m_invertibleCTM) |
- return false; |
- |
- FloatPoint point(x, y); |
- TransformationMatrix ctm = state().m_transform; |
- FloatPoint transformedPoint = ctm.inverse().mapPoint(point); |
- return m_path.contains(transformedPoint); |
-} |
- |
-void CanvasRenderingContext2D::clearRect(float x, float y, float width, float height) |
-{ |
- if (!validateRectForCanvas(x, y, width, height)) |
- return; |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- FloatRect rect(x, y, width, height); |
- willDraw(rect); |
- c->clearRect(rect); |
-} |
- |
-void CanvasRenderingContext2D::fillRect(float x, float y, float width, float height) |
-{ |
- if (!validateRectForCanvas(x, y, width, height)) |
- return; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- FloatRect rect(x, y, width, height); |
- willDraw(rect); |
- |
- c->save(); |
- c->fillRect(rect); |
- c->restore(); |
-} |
- |
-void CanvasRenderingContext2D::strokeRect(float x, float y, float width, float height) |
-{ |
- if (!validateRectForCanvas(x, y, width, height)) |
- return; |
- strokeRect(x, y, width, height, state().m_lineWidth); |
-} |
- |
-void CanvasRenderingContext2D::strokeRect(float x, float y, float width, float height, float lineWidth) |
-{ |
- if (!validateRectForCanvas(x, y, width, height)) |
- return; |
- |
- if (!(lineWidth >= 0)) |
- return; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- FloatRect rect(x, y, width, height); |
- |
- FloatRect boundingRect = rect; |
- boundingRect.inflate(lineWidth / 2); |
- willDraw(boundingRect); |
- |
- c->strokeRect(rect, lineWidth); |
-} |
- |
-#if PLATFORM(CG) |
-static inline CGSize adjustedShadowSize(CGFloat width, CGFloat height) |
-{ |
- // Work around <rdar://problem/5539388> by ensuring that shadow offsets will get truncated |
- // to the desired integer. |
- static const CGFloat extraShadowOffset = narrowPrecisionToCGFloat(1.0 / 128); |
- if (width > 0) |
- width += extraShadowOffset; |
- else if (width < 0) |
- width -= extraShadowOffset; |
- |
- if (height > 0) |
- height += extraShadowOffset; |
- else if (height < 0) |
- height -= extraShadowOffset; |
- |
- return CGSizeMake(width, height); |
-} |
-#endif |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = ""; |
- applyShadow(); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, const String& color) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = color; |
- applyShadow(); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float grayLevel) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = ""; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- RGBA32 rgba = makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, 1.0f); |
- c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, const String& color, float alpha) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = color; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- RGBA32 rgba = 0; // default is transparent black |
- if (!state().m_shadowColor.isEmpty()) |
- CSSParser::parseColor(rgba, state().m_shadowColor); |
- c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(colorWithOverrideAlpha(rgba, alpha))); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float grayLevel, float alpha) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = ""; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- RGBA32 rgba = makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, alpha); |
- c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float r, float g, float b, float a) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = ""; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- RGBA32 rgba = makeRGBA32FromFloats(r, g, b, a); // default is transparent black |
- if (!state().m_shadowColor.isEmpty()) |
- CSSParser::parseColor(rgba, state().m_shadowColor); |
- c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
-} |
- |
-void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float c, float m, float y, float k, float a) |
-{ |
- state().m_shadowOffset = FloatSize(width, height); |
- state().m_shadowBlur = blur; |
- state().m_shadowColor = ""; |
- |
- GraphicsContext* dc = drawingContext(); |
- if (!dc) |
- return; |
-#if PLATFORM(CG) |
- const CGFloat components[5] = { c, m, y, k, a }; |
- CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceCMYK(); |
- CGColorRef shadowColor = CGColorCreate(colorSpace, components); |
- CGColorSpaceRelease(colorSpace); |
- CGContextSetShadowWithColor(dc->platformContext(), adjustedShadowSize(width, -height), blur, shadowColor); |
- CGColorRelease(shadowColor); |
-#else |
- dc->setShadow(IntSize(width, -height), blur, Color(c, m, y, k, a)); |
-#endif |
-} |
- |
-void CanvasRenderingContext2D::clearShadow() |
-{ |
- state().m_shadowOffset = FloatSize(); |
- state().m_shadowBlur = 0; |
- state().m_shadowColor = ""; |
- applyShadow(); |
-} |
- |
-void CanvasRenderingContext2D::applyShadow() |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- |
- RGBA32 rgba = 0; // default is transparent black |
- if (!state().m_shadowColor.isEmpty()) |
- CSSParser::parseColor(rgba, state().m_shadowColor); |
- float width = state().m_shadowOffset.width(); |
- float height = state().m_shadowOffset.height(); |
- c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
-} |
- |
-static IntSize size(HTMLImageElement* image) |
-{ |
- if (CachedImage* cachedImage = image->cachedImage()) |
- return cachedImage->imageSize(1.0f); // FIXME: Not sure about this. |
- return IntSize(); |
-} |
- |
-static inline FloatRect normalizeRect(const FloatRect& rect) |
-{ |
- return FloatRect(min(rect.x(), rect.right()), |
- min(rect.y(), rect.bottom()), |
- max(rect.width(), -rect.width()), |
- max(rect.height(), -rect.height())); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, float x, float y) |
-{ |
- ASSERT(image); |
- IntSize s = size(image); |
- ExceptionCode ec; |
- drawImage(image, x, y, s.width(), s.height(), ec); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, |
- float x, float y, float width, float height, ExceptionCode& ec) |
-{ |
- ASSERT(image); |
- IntSize s = size(image); |
- drawImage(image, FloatRect(0, 0, s.width(), s.height()), FloatRect(x, y, width, height), ec); |
-} |
- |
-void CanvasRenderingContext2D::checkOrigin(const KURL& url) |
-{ |
- RefPtr<SecurityOrigin> origin = SecurityOrigin::create(url); |
- if (!m_canvas->document()->securityOrigin()->canAccess(origin.get())) |
- m_canvas->setOriginTainted(); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, const FloatRect& srcRect, const FloatRect& dstRect, |
- ExceptionCode& ec) |
-{ |
- ASSERT(image); |
- |
- ec = 0; |
- |
- FloatRect imageRect = FloatRect(FloatPoint(), size(image)); |
- if (!imageRect.contains(normalizeRect(srcRect)) || srcRect.width() == 0 || srcRect.height() == 0) { |
- ec = INDEX_SIZE_ERR; |
- return; |
- } |
- |
- if (!dstRect.width() || !dstRect.height()) |
- return; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- CachedImage* cachedImage = image->cachedImage(); |
- if (!cachedImage) |
- return; |
- |
- if (m_canvas->originClean()) |
- checkOrigin(cachedImage->response().url()); |
- |
- if (m_canvas->originClean() && !cachedImage->image()->hasSingleSecurityOrigin()) |
- m_canvas->setOriginTainted(); |
- |
- FloatRect sourceRect = c->roundToDevicePixels(srcRect); |
- FloatRect destRect = c->roundToDevicePixels(dstRect); |
- willDraw(destRect); |
- c->drawImage(cachedImage->image(), destRect, sourceRect, state().m_globalComposite); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, float x, float y) |
-{ |
- ASSERT(canvas); |
- ExceptionCode ec; |
- drawImage(canvas, x, y, canvas->width(), canvas->height(), ec); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, |
- float x, float y, float width, float height, ExceptionCode& ec) |
-{ |
- ASSERT(canvas); |
- drawImage(canvas, FloatRect(0, 0, canvas->width(), canvas->height()), FloatRect(x, y, width, height), ec); |
-} |
- |
-void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, const FloatRect& srcRect, |
- const FloatRect& dstRect, ExceptionCode& ec) |
-{ |
- ASSERT(canvas); |
- |
- ec = 0; |
- |
- FloatRect srcCanvasRect = FloatRect(FloatPoint(), canvas->size()); |
- if (!srcCanvasRect.contains(normalizeRect(srcRect)) || srcRect.width() == 0 || srcRect.height() == 0) { |
- ec = INDEX_SIZE_ERR; |
- return; |
- } |
- |
- if (!dstRect.width() || !dstRect.height()) |
- return; |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- FloatRect sourceRect = c->roundToDevicePixels(srcRect); |
- FloatRect destRect = c->roundToDevicePixels(dstRect); |
- |
- // FIXME: Do this through platform-independent GraphicsContext API. |
- ImageBuffer* buffer = canvas->buffer(); |
- if (!buffer) |
- return; |
- |
- if (!canvas->originClean()) |
- m_canvas->setOriginTainted(); |
- |
- c->drawImage(buffer->image(), destRect, sourceRect, state().m_globalComposite); |
- willDraw(destRect); // This call comes after drawImage, since the buffer we draw into may be our own, and we need to make sure it is dirty. |
- // FIXME: Arguably willDraw should become didDraw and occur after drawing calls and not before them to avoid problems like this. |
-} |
- |
-// FIXME: Why isn't this just another overload of drawImage? Why have a different name? |
-void CanvasRenderingContext2D::drawImageFromRect(HTMLImageElement* image, |
- float sx, float sy, float sw, float sh, |
- float dx, float dy, float dw, float dh, |
- const String& compositeOperation) |
-{ |
- if (!image) |
- return; |
- |
- CachedImage* cachedImage = image->cachedImage(); |
- if (!cachedImage) |
- return; |
- |
- if (m_canvas->originClean()) |
- checkOrigin(cachedImage->response().url()); |
- |
- if (m_canvas->originClean() && !cachedImage->image()->hasSingleSecurityOrigin()) |
- m_canvas->setOriginTainted(); |
- |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- CompositeOperator op; |
- if (!parseCompositeOperator(compositeOperation, op)) |
- op = CompositeSourceOver; |
- |
- FloatRect destRect = FloatRect(dx, dy, dw, dh); |
- willDraw(destRect); |
- c->drawImage(cachedImage->image(), destRect, FloatRect(sx, sy, sw, sh), op); |
-} |
- |
-void CanvasRenderingContext2D::setAlpha(float alpha) |
-{ |
- setGlobalAlpha(alpha); |
-} |
- |
-void CanvasRenderingContext2D::setCompositeOperation(const String& operation) |
-{ |
- setGlobalCompositeOperation(operation); |
-} |
- |
-PassRefPtr<CanvasGradient> CanvasRenderingContext2D::createLinearGradient(float x0, float y0, float x1, float y1, ExceptionCode& ec) |
-{ |
- if (!isfinite(x0) || !isfinite(y0) || !isfinite(x1) || !isfinite(y1)) { |
- ec = NOT_SUPPORTED_ERR; |
- return 0; |
- } |
- |
- return CanvasGradient::create(FloatPoint(x0, y0), FloatPoint(x1, y1)); |
-} |
- |
-PassRefPtr<CanvasGradient> CanvasRenderingContext2D::createRadialGradient(float x0, float y0, float r0, float x1, float y1, float r1, ExceptionCode& ec) |
-{ |
- if (!isfinite(x0) || !isfinite(y0) || !isfinite(r0) || |
- !isfinite(x1) || !isfinite(y1) || !isfinite(r1)) { |
- ec = NOT_SUPPORTED_ERR; |
- return 0; |
- } |
- return CanvasGradient::create(FloatPoint(x0, y0), r0, FloatPoint(x1, y1), r1); |
-} |
- |
-PassRefPtr<CanvasPattern> CanvasRenderingContext2D::createPattern(HTMLImageElement* image, |
- const String& repetitionType, ExceptionCode& ec) |
-{ |
- bool repeatX, repeatY; |
- ec = 0; |
- CanvasPattern::parseRepetitionType(repetitionType, repeatX, repeatY, ec); |
- if (ec) |
- return 0; |
- |
- if (!image->complete()) { |
- ec = INVALID_STATE_ERR; |
- return 0; |
- } |
- |
- CachedImage* cachedImage = image->cachedImage(); |
- if (!cachedImage || !image->cachedImage()->image()) |
- return CanvasPattern::create(Image::nullImage(), repeatX, repeatY, true); |
- |
- RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromString(cachedImage->url()); |
- bool originClean = m_canvas->document()->securityOrigin()->canAccess(origin.get()); |
- return CanvasPattern::create(cachedImage->image(), repeatX, repeatY, originClean); |
-} |
- |
-PassRefPtr<CanvasPattern> CanvasRenderingContext2D::createPattern(HTMLCanvasElement* canvas, |
- const String& repetitionType, ExceptionCode& ec) |
-{ |
- if (!canvas->width() || !canvas->height()) { |
- ec = INVALID_STATE_ERR; |
- return 0; |
- } |
- |
- bool repeatX, repeatY; |
- ec = 0; |
- CanvasPattern::parseRepetitionType(repetitionType, repeatX, repeatY, ec); |
- if (ec) |
- return 0; |
- return CanvasPattern::create(canvas->buffer()->image(), repeatX, repeatY, canvas->originClean()); |
-} |
- |
-void CanvasRenderingContext2D::willDraw(const FloatRect& r, unsigned options) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- FloatRect dirtyRect = r; |
- if (options & CanvasWillDrawApplyTransform) { |
- TransformationMatrix ctm = state().m_transform; |
- dirtyRect = ctm.mapRect(r); |
- } |
- |
- if (options & CanvasWillDrawApplyShadow) { |
- // The shadow gets applied after transformation |
- FloatRect shadowRect(dirtyRect); |
- shadowRect.move(state().m_shadowOffset); |
- shadowRect.inflate(state().m_shadowBlur); |
- dirtyRect.unite(shadowRect); |
- } |
- |
- if (options & CanvasWillDrawApplyClip) { |
- // FIXME: apply the current clip to the rectangle. Unfortunately we can't get the clip |
- // back out of the GraphicsContext, so to take clip into account for incremental painting, |
- // we'd have to keep the clip path around. |
- } |
- |
- m_canvas->willDraw(dirtyRect); |
-} |
- |
-GraphicsContext* CanvasRenderingContext2D::drawingContext() const |
-{ |
- return m_canvas->drawingContext(); |
-} |
- |
-static PassRefPtr<ImageData> createEmptyImageData(const IntSize& size) |
-{ |
- RefPtr<ImageData> data = ImageData::create(size.width(), size.height()); |
- memset(data->data()->data()->data(), 0, data->data()->data()->length()); |
- return data.get(); |
-} |
- |
-PassRefPtr<ImageData> CanvasRenderingContext2D::createImageData(float sw, float sh) const |
-{ |
- FloatSize unscaledSize(sw, sh); |
- IntSize scaledSize = m_canvas->convertLogicalToDevice(unscaledSize); |
- if (scaledSize.width() < 1) |
- scaledSize.setWidth(1); |
- if (scaledSize.height() < 1) |
- scaledSize.setHeight(1); |
- |
- return createEmptyImageData(scaledSize); |
-} |
- |
-PassRefPtr<ImageData> CanvasRenderingContext2D::getImageData(float sx, float sy, float sw, float sh, ExceptionCode& ec) const |
-{ |
- if (!m_canvas->originClean()) { |
- ec = SECURITY_ERR; |
- return 0; |
- } |
- |
- FloatRect unscaledRect(sx, sy, sw, sh); |
- IntRect scaledRect = m_canvas->convertLogicalToDevice(unscaledRect); |
- if (scaledRect.width() < 1) |
- scaledRect.setWidth(1); |
- if (scaledRect.height() < 1) |
- scaledRect.setHeight(1); |
- ImageBuffer* buffer = m_canvas ? m_canvas->buffer() : 0; |
- if (!buffer) |
- return createEmptyImageData(scaledRect.size()); |
- return buffer->getImageData(scaledRect); |
-} |
- |
-void CanvasRenderingContext2D::putImageData(ImageData* data, float dx, float dy, ExceptionCode& ec) |
-{ |
- if (!data) { |
- ec = TYPE_MISMATCH_ERR; |
- return; |
- } |
- putImageData(data, dx, dy, 0, 0, data->width(), data->height(), ec); |
-} |
- |
-void CanvasRenderingContext2D::putImageData(ImageData* data, float dx, float dy, float dirtyX, float dirtyY, |
- float dirtyWidth, float dirtyHeight, ExceptionCode& ec) |
-{ |
- if (!data) { |
- ec = TYPE_MISMATCH_ERR; |
- return; |
- } |
- if (!isfinite(dx) || !isfinite(dy) || !isfinite(dirtyX) || |
- !isfinite(dirtyY) || !isfinite(dirtyWidth) || !isfinite(dirtyHeight)) { |
- ec = INDEX_SIZE_ERR; |
- return; |
- } |
- |
- ImageBuffer* buffer = m_canvas->buffer(); |
- if (!buffer) |
- return; |
- |
- if (dirtyWidth < 0) { |
- dirtyX += dirtyWidth; |
- dirtyWidth = -dirtyWidth; |
- } |
- |
- if (dirtyHeight < 0) { |
- dirtyY += dirtyHeight; |
- dirtyHeight = -dirtyHeight; |
- } |
- |
- FloatRect clipRect(dirtyX, dirtyY, dirtyWidth, dirtyHeight); |
- clipRect.intersect(IntRect(0, 0, data->width(), data->height())); |
- IntSize destOffset(static_cast<int>(dx), static_cast<int>(dy)); |
- IntRect sourceRect = enclosingIntRect(clipRect); |
- sourceRect.move(destOffset); |
- sourceRect.intersect(IntRect(IntPoint(), buffer->size())); |
- if (sourceRect.isEmpty()) |
- return; |
- willDraw(sourceRect, 0); // ignore transform, shadow and clip |
- sourceRect.move(-destOffset); |
- IntPoint destPoint(destOffset.width(), destOffset.height()); |
- |
- buffer->putImageData(data, sourceRect, destPoint); |
-} |
- |
-String CanvasRenderingContext2D::font() const |
-{ |
- return state().m_unparsedFont; |
-} |
- |
-void CanvasRenderingContext2D::setFont(const String& newFont) |
-{ |
- RefPtr<CSSMutableStyleDeclaration> tempDecl = CSSMutableStyleDeclaration::create(); |
- CSSParser parser(!m_canvas->document()->inCompatMode()); // Use the parse mode of the canvas' document when parsing CSS. |
- |
- String declarationText("font: "); |
- declarationText += newFont; |
- parser.parseDeclaration(tempDecl.get(), declarationText); |
- if (!tempDecl->length()) |
- return; |
- |
- // The parse succeeded. |
- state().m_unparsedFont = newFont; |
- |
- // Map the <canvas> font into the text style. If the font uses keywords like larger/smaller, these will work |
- // relative to the canvas. |
- RefPtr<RenderStyle> newStyle = RenderStyle::create(); |
- if (m_canvas->computedStyle()) |
- newStyle->setFontDescription(m_canvas->computedStyle()->fontDescription()); |
- |
- // Now map the font property into the style. |
- CSSStyleSelector* styleSelector = m_canvas->document()->styleSelector(); |
- styleSelector->applyPropertyToStyle(CSSPropertyFont, tempDecl->getPropertyCSSValue(CSSPropertyFont).get(), newStyle.get()); |
- |
- state().m_font = newStyle->font(); |
- state().m_font.update(styleSelector->fontSelector()); |
- state().m_realizedFont = true; |
-} |
- |
-String CanvasRenderingContext2D::textAlign() const |
-{ |
- return textAlignName(state().m_textAlign); |
-} |
- |
-void CanvasRenderingContext2D::setTextAlign(const String& s) |
-{ |
- TextAlign align; |
- if (!parseTextAlign(s, align)) |
- return; |
- state().m_textAlign = align; |
-} |
- |
-String CanvasRenderingContext2D::textBaseline() const |
-{ |
- return textBaselineName(state().m_textBaseline); |
-} |
- |
-void CanvasRenderingContext2D::setTextBaseline(const String& s) |
-{ |
- TextBaseline baseline; |
- if (!parseTextBaseline(s, baseline)) |
- return; |
- state().m_textBaseline = baseline; |
-} |
- |
-void CanvasRenderingContext2D::fillText(const String& text, float x, float y) |
-{ |
- drawTextInternal(text, x, y, true); |
-} |
- |
-void CanvasRenderingContext2D::fillText(const String& text, float x, float y, float maxWidth) |
-{ |
- drawTextInternal(text, x, y, true, maxWidth, true); |
-} |
- |
-void CanvasRenderingContext2D::strokeText(const String& text, float x, float y) |
-{ |
- drawTextInternal(text, x, y, false); |
-} |
- |
-void CanvasRenderingContext2D::strokeText(const String& text, float x, float y, float maxWidth) |
-{ |
- drawTextInternal(text, x, y, false, maxWidth, true); |
-} |
- |
-PassRefPtr<TextMetrics> CanvasRenderingContext2D::measureText(const String& text) |
-{ |
- RefPtr<TextMetrics> metrics = TextMetrics::create(); |
- metrics->setWidth(accessFont().width(TextRun(text.characters(), text.length()))); |
- return metrics; |
-} |
- |
-void CanvasRenderingContext2D::drawTextInternal(const String& text, float x, float y, bool fill, float /*maxWidth*/, bool /*useMaxWidth*/) |
-{ |
- GraphicsContext* c = drawingContext(); |
- if (!c) |
- return; |
- if (!state().m_invertibleCTM) |
- return; |
- |
- const Font& font = accessFont(); |
- |
- // FIXME: Handle maxWidth. |
- // FIXME: Need to turn off font smoothing. |
- |
- bool rtl = m_canvas->computedStyle() ? m_canvas->computedStyle()->direction() == RTL : false; |
- bool override = m_canvas->computedStyle() ? m_canvas->computedStyle()->unicodeBidi() == Override : false; |
- |
- unsigned length = text.length(); |
- const UChar* string = text.characters(); |
- TextRun textRun(string, length, 0, 0, 0, rtl, override, false, false); |
- |
- // Draw the item text at the correct point. |
- FloatPoint location(x, y); |
- switch (state().m_textBaseline) { |
- case TopTextBaseline: |
- case HangingTextBaseline: |
- location.setY(y + font.ascent()); |
- break; |
- case BottomTextBaseline: |
- case IdeographicTextBaseline: |
- location.setY(y - font.descent()); |
- break; |
- case MiddleTextBaseline: |
- location.setY(y - font.descent() + font.height() / 2); |
- break; |
- case AlphabeticTextBaseline: |
- default: |
- // Do nothing. |
- break; |
- } |
- |
- float width = font.width(TextRun(text, false, 0, 0, rtl, override)); |
- |
- TextAlign align = state().m_textAlign; |
- if (align == StartTextAlign) |
- align = rtl ? RightTextAlign : LeftTextAlign; |
- else if (align == EndTextAlign) |
- align = rtl ? LeftTextAlign : RightTextAlign; |
- |
- switch (align) { |
- case CenterTextAlign: |
- location.setX(location.x() - width / 2); |
- break; |
- case RightTextAlign: |
- location.setX(location.x() - width); |
- break; |
- default: |
- break; |
- } |
- |
- // The slop built in to this mask rect matches the heuristic used in FontCGWin.cpp for GDI text. |
- FloatRect textRect = FloatRect(location.x() - font.height() / 2, location.y() - font.ascent() - font.lineGap(), |
- width + font.height(), font.lineSpacing()); |
- if (!fill) |
- textRect.inflate(c->strokeThickness() / 2); |
- |
- if (fill) |
- m_canvas->willDraw(textRect); |
- else { |
- // When stroking text, pointy miters can extend outside of textRect, so we |
- // punt and dirty the whole canvas. |
- m_canvas->willDraw(FloatRect(0, 0, m_canvas->width(), m_canvas->height())); |
- } |
- |
- CanvasStyle* drawStyle = fill ? state().m_fillStyle.get() : state().m_strokeStyle.get(); |
- if (drawStyle->canvasGradient() || drawStyle->canvasPattern()) { |
- // FIXME: The rect is not big enough for miters on stroked text. |
- IntRect maskRect = enclosingIntRect(textRect); |
- |
- auto_ptr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size(), false); |
- |
- GraphicsContext* maskImageContext = maskImage->context(); |
- |
- if (fill) |
- maskImageContext->setFillColor(Color::black); |
- else { |
- maskImageContext->setStrokeColor(Color::black); |
- maskImageContext->setStrokeThickness(c->strokeThickness()); |
- } |
- |
- maskImageContext->setTextDrawingMode(fill ? cTextFill : cTextStroke); |
- maskImageContext->translate(-maskRect.x(), -maskRect.y()); |
- |
- maskImageContext->drawBidiText(font, textRun, location); |
- |
- c->save(); |
- c->clipToImageBuffer(maskRect, maskImage.get()); |
- drawStyle->applyFillColor(c); |
- c->fillRect(maskRect); |
- c->restore(); |
- |
- return; |
- } |
- |
- c->setTextDrawingMode(fill ? cTextFill : cTextStroke); |
- c->drawBidiText(font, textRun, location); |
-} |
- |
-const Font& CanvasRenderingContext2D::accessFont() |
-{ |
- if (!state().m_realizedFont) |
- setFont(state().m_unparsedFont); |
- return state().m_font; |
-} |
- |
-} // namespace WebCore |
+/* |
+ * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved. |
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) |
+ * Copyright (C) 2007 Alp Toker <alp@atoker.com> |
+ * Copyright (C) 2008 Eric Seidel <eric@webkit.org> |
+ * Copyright (C) 2008 Dirk Schulze <krit@webkit.org> |
+ * |
+ * Redistribution and use in source and binary forms, with or without |
+ * modification, are permitted provided that the following conditions |
+ * are met: |
+ * 1. Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * 2. Redistributions in binary form must reproduce the above copyright |
+ * notice, this list of conditions and the following disclaimer in the |
+ * documentation and/or other materials provided with the distribution. |
+ * |
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
+ */ |
+ |
+#include "config.h" |
+#include "CanvasRenderingContext2D.h" |
+ |
+#include "TransformationMatrix.h" |
+#include "CSSParser.h" |
+#include "CachedImage.h" |
+#include "CanvasGradient.h" |
+#include "CanvasPattern.h" |
+#include "CanvasStyle.h" |
+#include "CSSPropertyNames.h" |
+#include "CSSStyleSelector.h" |
+#include "Document.h" |
+#include "ExceptionCode.h" |
+#include "FloatConversion.h" |
+#include "Frame.h" |
+#include "GraphicsContext.h" |
+#include "HTMLCanvasElement.h" |
+#include "HTMLImageElement.h" |
+#include "HTMLNames.h" |
+#include "ImageBuffer.h" |
+#include "ImageData.h" |
+#include "KURL.h" |
+#include "NotImplemented.h" |
+#include "Page.h" |
+#include "RenderHTMLCanvas.h" |
+#include "SecurityOrigin.h" |
+#include "Settings.h" |
+#include "StrokeStyleApplier.h" |
+#include "TextMetrics.h" |
+#include <stdio.h> |
+ |
+#include <wtf/ByteArray.h> |
+#include <wtf/MathExtras.h> |
+ |
+using namespace std; |
+ |
+namespace WebCore { |
+ |
+using namespace HTMLNames; |
+ |
+static const char* const defaultFont = "10px sans-serif"; |
+ |
+ |
+class CanvasStrokeStyleApplier : public StrokeStyleApplier { |
+public: |
+ CanvasStrokeStyleApplier(CanvasRenderingContext2D* canvasContext) |
+ : m_canvasContext(canvasContext) |
+ { |
+ } |
+ |
+ virtual void strokeStyle(GraphicsContext* c) |
+ { |
+ c->setStrokeThickness(m_canvasContext->lineWidth()); |
+ c->setLineCap(m_canvasContext->getLineCap()); |
+ c->setLineJoin(m_canvasContext->getLineJoin()); |
+ c->setMiterLimit(m_canvasContext->miterLimit()); |
+ } |
+ |
+private: |
+ CanvasRenderingContext2D* m_canvasContext; |
+}; |
+ |
+ |
+ |
+CanvasRenderingContext2D::CanvasRenderingContext2D(HTMLCanvasElement* canvas) |
+ : m_canvas(canvas) |
+ , m_stateStack(1) |
+{ |
+} |
+ |
+void CanvasRenderingContext2D::ref() |
+{ |
+ m_canvas->ref(); |
+} |
+ |
+void CanvasRenderingContext2D::deref() |
+{ |
+ m_canvas->deref(); |
+} |
+ |
+void CanvasRenderingContext2D::reset() |
+{ |
+ m_stateStack.resize(1); |
+ m_stateStack.first() = State(); |
+} |
+ |
+CanvasRenderingContext2D::State::State() |
+ : m_strokeStyle(CanvasStyle::create("black")) |
+ , m_fillStyle(CanvasStyle::create("black")) |
+ , m_lineWidth(1) |
+ , m_lineCap(ButtCap) |
+ , m_lineJoin(MiterJoin) |
+ , m_miterLimit(10) |
+ , m_shadowBlur(0) |
+ , m_shadowColor("black") |
+ , m_globalAlpha(1) |
+ , m_globalComposite(CompositeSourceOver) |
+ , m_invertibleCTM(true) |
+ , m_textAlign(StartTextAlign) |
+ , m_textBaseline(AlphabeticTextBaseline) |
+ , m_unparsedFont(defaultFont) |
+ , m_realizedFont(false) |
+{ |
+} |
+ |
+void CanvasRenderingContext2D::save() |
+{ |
+ ASSERT(m_stateStack.size() >= 1); |
+ m_stateStack.append(state()); |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->save(); |
+} |
+ |
+void CanvasRenderingContext2D::restore() |
+{ |
+ ASSERT(m_stateStack.size() >= 1); |
+ if (m_stateStack.size() <= 1) |
+ return; |
+ m_path.transform(state().m_transform); |
+ m_stateStack.removeLast(); |
+ m_path.transform(state().m_transform.inverse()); |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->restore(); |
+} |
+ |
+CanvasStyle* CanvasRenderingContext2D::strokeStyle() const |
+{ |
+ return state().m_strokeStyle.get(); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeStyle(PassRefPtr<CanvasStyle> style) |
+{ |
+ if (!style) |
+ return; |
+ |
+ if (m_canvas->originClean()) { |
+ if (CanvasPattern* pattern = style->canvasPattern()) { |
+ if (!pattern->originClean()) |
+ m_canvas->setOriginTainted(); |
+ } |
+ } |
+ |
+ state().m_strokeStyle = style; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ state().m_strokeStyle->applyStrokeColor(c); |
+} |
+ |
+CanvasStyle* CanvasRenderingContext2D::fillStyle() const |
+{ |
+ return state().m_fillStyle.get(); |
+} |
+ |
+void CanvasRenderingContext2D::setFillStyle(PassRefPtr<CanvasStyle> style) |
+{ |
+ if (!style) |
+ return; |
+ |
+ if (m_canvas->originClean()) { |
+ if (CanvasPattern* pattern = style->canvasPattern()) { |
+ if (!pattern->originClean()) |
+ m_canvas->setOriginTainted(); |
+ } |
+ } |
+ |
+ state().m_fillStyle = style; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ state().m_fillStyle->applyFillColor(c); |
+} |
+ |
+float CanvasRenderingContext2D::lineWidth() const |
+{ |
+ return state().m_lineWidth; |
+} |
+ |
+void CanvasRenderingContext2D::setLineWidth(float width) |
+{ |
+ if (!(width > 0)) |
+ return; |
+ state().m_lineWidth = width; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setStrokeThickness(width); |
+} |
+ |
+String CanvasRenderingContext2D::lineCap() const |
+{ |
+ return lineCapName(state().m_lineCap); |
+} |
+ |
+void CanvasRenderingContext2D::setLineCap(const String& s) |
+{ |
+ LineCap cap; |
+ if (!parseLineCap(s, cap)) |
+ return; |
+ state().m_lineCap = cap; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setLineCap(cap); |
+} |
+ |
+String CanvasRenderingContext2D::lineJoin() const |
+{ |
+ return lineJoinName(state().m_lineJoin); |
+} |
+ |
+void CanvasRenderingContext2D::setLineJoin(const String& s) |
+{ |
+ LineJoin join; |
+ if (!parseLineJoin(s, join)) |
+ return; |
+ state().m_lineJoin = join; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setLineJoin(join); |
+} |
+ |
+float CanvasRenderingContext2D::miterLimit() const |
+{ |
+ return state().m_miterLimit; |
+} |
+ |
+void CanvasRenderingContext2D::setMiterLimit(float limit) |
+{ |
+ if (!(limit > 0)) |
+ return; |
+ state().m_miterLimit = limit; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setMiterLimit(limit); |
+} |
+ |
+float CanvasRenderingContext2D::shadowOffsetX() const |
+{ |
+ return state().m_shadowOffset.width(); |
+} |
+ |
+void CanvasRenderingContext2D::setShadowOffsetX(float x) |
+{ |
+ state().m_shadowOffset.setWidth(x); |
+ applyShadow(); |
+} |
+ |
+float CanvasRenderingContext2D::shadowOffsetY() const |
+{ |
+ return state().m_shadowOffset.height(); |
+} |
+ |
+void CanvasRenderingContext2D::setShadowOffsetY(float y) |
+{ |
+ state().m_shadowOffset.setHeight(y); |
+ applyShadow(); |
+} |
+ |
+float CanvasRenderingContext2D::shadowBlur() const |
+{ |
+ return state().m_shadowBlur; |
+} |
+ |
+void CanvasRenderingContext2D::setShadowBlur(float blur) |
+{ |
+ state().m_shadowBlur = blur; |
+ applyShadow(); |
+} |
+ |
+String CanvasRenderingContext2D::shadowColor() const |
+{ |
+ // FIXME: What should this return if you called setShadow with a non-string color? |
+ return state().m_shadowColor; |
+} |
+ |
+void CanvasRenderingContext2D::setShadowColor(const String& color) |
+{ |
+ state().m_shadowColor = color; |
+ applyShadow(); |
+} |
+ |
+float CanvasRenderingContext2D::globalAlpha() const |
+{ |
+ return state().m_globalAlpha; |
+} |
+ |
+void CanvasRenderingContext2D::setGlobalAlpha(float alpha) |
+{ |
+ if (!(alpha >= 0 && alpha <= 1)) |
+ return; |
+ state().m_globalAlpha = alpha; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setAlpha(alpha); |
+} |
+ |
+String CanvasRenderingContext2D::globalCompositeOperation() const |
+{ |
+ return compositeOperatorName(state().m_globalComposite); |
+} |
+ |
+void CanvasRenderingContext2D::setGlobalCompositeOperation(const String& operation) |
+{ |
+ CompositeOperator op; |
+ if (!parseCompositeOperator(operation, op)) |
+ return; |
+ state().m_globalComposite = op; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ c->setCompositeOperation(op); |
+} |
+ |
+void CanvasRenderingContext2D::scale(float sx, float sy) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ TransformationMatrix newTransform = state().m_transform; |
+ newTransform.scale(sx, sy); |
+ if (!newTransform.isInvertible()) { |
+ state().m_invertibleCTM = false; |
+ return; |
+ } |
+ |
+ state().m_transform = newTransform; |
+ c->scale(FloatSize(sx, sy)); |
+ m_path.transform(TransformationMatrix().scale(1.0/sx, 1.0/sy)); |
+} |
+ |
+void CanvasRenderingContext2D::rotate(float angleInRadians) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ TransformationMatrix newTransform = state().m_transform; |
+ newTransform.rotate(angleInRadians / piDouble * 180.0); |
+ if (!newTransform.isInvertible()) { |
+ state().m_invertibleCTM = false; |
+ return; |
+ } |
+ |
+ state().m_transform = newTransform; |
+ c->rotate(angleInRadians); |
+ m_path.transform(TransformationMatrix().rotate(-angleInRadians / piDouble * 180.0)); |
+} |
+ |
+void CanvasRenderingContext2D::translate(float tx, float ty) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ TransformationMatrix newTransform = state().m_transform; |
+ newTransform.translate(tx, ty); |
+ if (!newTransform.isInvertible()) { |
+ state().m_invertibleCTM = false; |
+ return; |
+ } |
+ |
+ state().m_transform = newTransform; |
+ c->translate(tx, ty); |
+ m_path.transform(TransformationMatrix().translate(-tx, -ty)); |
+} |
+ |
+void CanvasRenderingContext2D::transform(float m11, float m12, float m21, float m22, float dx, float dy) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ // HTML5 3.14.11.1 -- ignore any calls that pass non-finite numbers |
+ if (!isfinite(m11) | !isfinite(m21) | !isfinite(dx) | |
+ !isfinite(m12) | !isfinite(m22) | !isfinite(dy)) |
+ return; |
+ |
+ TransformationMatrix transform(m11, m12, m21, m22, dx, dy); |
+ TransformationMatrix newTransform = transform * state().m_transform; |
+ if (!newTransform.isInvertible()) { |
+ state().m_invertibleCTM = false; |
+ return; |
+ } |
+ |
+ state().m_transform = newTransform; |
+ c->concatCTM(transform); |
+ m_path.transform(transform.inverse()); |
+} |
+ |
+void CanvasRenderingContext2D::setTransform(float m11, float m12, float m21, float m22, float dx, float dy) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ // HTML5 3.14.11.1 -- ignore any calls that pass non-finite numbers |
+ if (!isfinite(m11) | !isfinite(m21) | !isfinite(dx) | |
+ !isfinite(m12) | !isfinite(m22) | !isfinite(dy)) |
+ return; |
+ |
+ TransformationMatrix ctm = state().m_transform; |
+ if (!ctm.isInvertible()) |
+ return; |
+ c->concatCTM(c->getCTM().inverse()); |
+ c->concatCTM(m_canvas->baseTransform()); |
+ state().m_transform.multiply(ctm.inverse()); |
+ m_path.transform(ctm); |
+ |
+ state().m_invertibleCTM = true; |
+ transform(m11, m12, m21, m22, dx, dy); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(const String& color) |
+{ |
+ setStrokeStyle(CanvasStyle::create(color)); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(float grayLevel) |
+{ |
+ setStrokeStyle(CanvasStyle::create(grayLevel, 1)); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(const String& color, float alpha) |
+{ |
+ setStrokeStyle(CanvasStyle::create(color, alpha)); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(float grayLevel, float alpha) |
+{ |
+ setStrokeStyle(CanvasStyle::create(grayLevel, alpha)); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(float r, float g, float b, float a) |
+{ |
+ setStrokeStyle(CanvasStyle::create(r, g, b, a)); |
+} |
+ |
+void CanvasRenderingContext2D::setStrokeColor(float c, float m, float y, float k, float a) |
+{ |
+ setStrokeStyle(CanvasStyle::create(c, m, y, k, a)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(const String& color) |
+{ |
+ setFillStyle(CanvasStyle::create(color)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(float grayLevel) |
+{ |
+ setFillStyle(CanvasStyle::create(grayLevel, 1)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(const String& color, float alpha) |
+{ |
+ setFillStyle(CanvasStyle::create(color, alpha)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(float grayLevel, float alpha) |
+{ |
+ setFillStyle(CanvasStyle::create(grayLevel, alpha)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(float r, float g, float b, float a) |
+{ |
+ setFillStyle(CanvasStyle::create(r, g, b, a)); |
+} |
+ |
+void CanvasRenderingContext2D::setFillColor(float c, float m, float y, float k, float a) |
+{ |
+ setFillStyle(CanvasStyle::create(c, m, y, k, a)); |
+} |
+ |
+void CanvasRenderingContext2D::beginPath() |
+{ |
+ m_path.clear(); |
+} |
+ |
+void CanvasRenderingContext2D::closePath() |
+{ |
+ m_path.closeSubpath(); |
+} |
+ |
+void CanvasRenderingContext2D::moveTo(float x, float y) |
+{ |
+ if (!isfinite(x) | !isfinite(y)) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.moveTo(FloatPoint(x, y)); |
+} |
+ |
+void CanvasRenderingContext2D::lineTo(float x, float y) |
+{ |
+ if (!isfinite(x) | !isfinite(y)) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addLineTo(FloatPoint(x, y)); |
+} |
+ |
+void CanvasRenderingContext2D::quadraticCurveTo(float cpx, float cpy, float x, float y) |
+{ |
+ if (!isfinite(cpx) | !isfinite(cpy) | !isfinite(x) | !isfinite(y)) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addQuadCurveTo(FloatPoint(cpx, cpy), FloatPoint(x, y)); |
+} |
+ |
+void CanvasRenderingContext2D::bezierCurveTo(float cp1x, float cp1y, float cp2x, float cp2y, float x, float y) |
+{ |
+ if (!isfinite(cp1x) | !isfinite(cp1y) | !isfinite(cp2x) | !isfinite(cp2y) | !isfinite(x) | !isfinite(y)) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addBezierCurveTo(FloatPoint(cp1x, cp1y), FloatPoint(cp2x, cp2y), FloatPoint(x, y)); |
+} |
+ |
+void CanvasRenderingContext2D::arcTo(float x0, float y0, float x1, float y1, float r, ExceptionCode& ec) |
+{ |
+ ec = 0; |
+ if (!isfinite(x0) | !isfinite(y0) | !isfinite(x1) | !isfinite(y1) | !isfinite(r)) |
+ return; |
+ |
+ if (r < 0) { |
+ ec = INDEX_SIZE_ERR; |
+ return; |
+ } |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addArcTo(FloatPoint(x0, y0), FloatPoint(x1, y1), r); |
+} |
+ |
+void CanvasRenderingContext2D::arc(float x, float y, float r, float sa, float ea, bool anticlockwise, ExceptionCode& ec) |
+{ |
+ ec = 0; |
+ if (!isfinite(x) | !isfinite(y) | !isfinite(r) | !isfinite(sa) | !isfinite(ea)) |
+ return; |
+ |
+ if (r < 0) { |
+ ec = INDEX_SIZE_ERR; |
+ return; |
+ } |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addArc(FloatPoint(x, y), r, sa, ea, anticlockwise); |
+} |
+ |
+static bool validateRectForCanvas(float& x, float& y, float& width, float& height) |
+{ |
+ if (!isfinite(x) | !isfinite(y) | !isfinite(width) | !isfinite(height)) |
+ return false; |
+ |
+ if (width < 0) { |
+ width = -width; |
+ x -= width; |
+ } |
+ |
+ if (height < 0) { |
+ height = -height; |
+ y -= height; |
+ } |
+ |
+ return true; |
+} |
+ |
+void CanvasRenderingContext2D::rect(float x, float y, float width, float height) |
+{ |
+ if (!validateRectForCanvas(x, y, width, height)) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ m_path.addRect(FloatRect(x, y, width, height)); |
+} |
+ |
+#if ENABLE(DASHBOARD_SUPPORT) |
+void CanvasRenderingContext2D::clearPathForDashboardBackwardCompatibilityMode() |
+{ |
+ if (Settings* settings = m_canvas->document()->settings()) |
+ if (settings->usesDashboardBackwardCompatibilityMode()) |
+ m_path.clear(); |
+} |
+#endif |
+ |
+void CanvasRenderingContext2D::fill() |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ if (!m_path.isEmpty()) { |
+ c->beginPath(); |
+ c->addPath(m_path); |
+ willDraw(m_path.boundingRect()); |
+ c->fillPath(); |
+ } |
+ |
+#if ENABLE(DASHBOARD_SUPPORT) |
+ clearPathForDashboardBackwardCompatibilityMode(); |
+#endif |
+} |
+ |
+void CanvasRenderingContext2D::stroke() |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ if (!m_path.isEmpty()) { |
+ c->beginPath(); |
+ c->addPath(m_path); |
+ |
+ CanvasStrokeStyleApplier strokeApplier(this); |
+ FloatRect boundingRect = m_path.strokeBoundingRect(&strokeApplier); |
+ willDraw(boundingRect); |
+ |
+ c->strokePath(); |
+ } |
+ |
+#if ENABLE(DASHBOARD_SUPPORT) |
+ clearPathForDashboardBackwardCompatibilityMode(); |
+#endif |
+} |
+ |
+void CanvasRenderingContext2D::clip() |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ c->clip(m_path); |
+#if ENABLE(DASHBOARD_SUPPORT) |
+ clearPathForDashboardBackwardCompatibilityMode(); |
+#endif |
+} |
+ |
+bool CanvasRenderingContext2D::isPointInPath(const float x, const float y) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return false; |
+ if (!state().m_invertibleCTM) |
+ return false; |
+ |
+ FloatPoint point(x, y); |
+ TransformationMatrix ctm = state().m_transform; |
+ FloatPoint transformedPoint = ctm.inverse().mapPoint(point); |
+ return m_path.contains(transformedPoint); |
+} |
+ |
+void CanvasRenderingContext2D::clearRect(float x, float y, float width, float height) |
+{ |
+ if (!validateRectForCanvas(x, y, width, height)) |
+ return; |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ FloatRect rect(x, y, width, height); |
+ willDraw(rect); |
+ c->clearRect(rect); |
+} |
+ |
+void CanvasRenderingContext2D::fillRect(float x, float y, float width, float height) |
+{ |
+ if (!validateRectForCanvas(x, y, width, height)) |
+ return; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ FloatRect rect(x, y, width, height); |
+ willDraw(rect); |
+ |
+ c->save(); |
+ c->fillRect(rect); |
+ c->restore(); |
+} |
+ |
+void CanvasRenderingContext2D::strokeRect(float x, float y, float width, float height) |
+{ |
+ if (!validateRectForCanvas(x, y, width, height)) |
+ return; |
+ strokeRect(x, y, width, height, state().m_lineWidth); |
+} |
+ |
+void CanvasRenderingContext2D::strokeRect(float x, float y, float width, float height, float lineWidth) |
+{ |
+ if (!validateRectForCanvas(x, y, width, height)) |
+ return; |
+ |
+ if (!(lineWidth >= 0)) |
+ return; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ FloatRect rect(x, y, width, height); |
+ |
+ FloatRect boundingRect = rect; |
+ boundingRect.inflate(lineWidth / 2); |
+ willDraw(boundingRect); |
+ |
+ c->strokeRect(rect, lineWidth); |
+} |
+ |
+#if PLATFORM(CG) |
+static inline CGSize adjustedShadowSize(CGFloat width, CGFloat height) |
+{ |
+ // Work around <rdar://problem/5539388> by ensuring that shadow offsets will get truncated |
+ // to the desired integer. |
+ static const CGFloat extraShadowOffset = narrowPrecisionToCGFloat(1.0 / 128); |
+ if (width > 0) |
+ width += extraShadowOffset; |
+ else if (width < 0) |
+ width -= extraShadowOffset; |
+ |
+ if (height > 0) |
+ height += extraShadowOffset; |
+ else if (height < 0) |
+ height -= extraShadowOffset; |
+ |
+ return CGSizeMake(width, height); |
+} |
+#endif |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = ""; |
+ applyShadow(); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, const String& color) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = color; |
+ applyShadow(); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float grayLevel) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = ""; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ RGBA32 rgba = makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, 1.0f); |
+ c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, const String& color, float alpha) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = color; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ RGBA32 rgba = 0; // default is transparent black |
+ if (!state().m_shadowColor.isEmpty()) |
+ CSSParser::parseColor(rgba, state().m_shadowColor); |
+ c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(colorWithOverrideAlpha(rgba, alpha))); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float grayLevel, float alpha) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = ""; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ RGBA32 rgba = makeRGBA32FromFloats(grayLevel, grayLevel, grayLevel, alpha); |
+ c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float r, float g, float b, float a) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = ""; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ RGBA32 rgba = makeRGBA32FromFloats(r, g, b, a); // default is transparent black |
+ if (!state().m_shadowColor.isEmpty()) |
+ CSSParser::parseColor(rgba, state().m_shadowColor); |
+ c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
+} |
+ |
+void CanvasRenderingContext2D::setShadow(float width, float height, float blur, float c, float m, float y, float k, float a) |
+{ |
+ state().m_shadowOffset = FloatSize(width, height); |
+ state().m_shadowBlur = blur; |
+ state().m_shadowColor = ""; |
+ |
+ GraphicsContext* dc = drawingContext(); |
+ if (!dc) |
+ return; |
+ // FIXME: Do this through platform-independent GraphicsContext API. |
+#if PLATFORM(CG) |
+ const CGFloat components[5] = { c, m, y, k, a }; |
+ CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceCMYK(); |
+ CGColorRef shadowColor = CGColorCreate(colorSpace, components); |
+ CGColorSpaceRelease(colorSpace); |
+ CGContextSetShadowWithColor(dc->platformContext(), adjustedShadowSize(width, -height), blur, shadowColor); |
+ CGColorRelease(shadowColor); |
+#endif |
+} |
+ |
+void CanvasRenderingContext2D::clearShadow() |
+{ |
+ state().m_shadowOffset = FloatSize(); |
+ state().m_shadowBlur = 0; |
+ state().m_shadowColor = ""; |
+ applyShadow(); |
+} |
+ |
+void CanvasRenderingContext2D::applyShadow() |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ |
+ RGBA32 rgba = 0; // default is transparent black |
+ if (!state().m_shadowColor.isEmpty()) |
+ CSSParser::parseColor(rgba, state().m_shadowColor); |
+ float width = state().m_shadowOffset.width(); |
+ float height = state().m_shadowOffset.height(); |
+ c->setShadow(IntSize(width, -height), state().m_shadowBlur, Color(rgba)); |
+} |
+ |
+static IntSize size(HTMLImageElement* image) |
+{ |
+ if (CachedImage* cachedImage = image->cachedImage()) |
+ return cachedImage->imageSize(1.0f); // FIXME: Not sure about this. |
+ return IntSize(); |
+} |
+ |
+static inline FloatRect normalizeRect(const FloatRect& rect) |
+{ |
+ return FloatRect(min(rect.x(), rect.right()), |
+ min(rect.y(), rect.bottom()), |
+ max(rect.width(), -rect.width()), |
+ max(rect.height(), -rect.height())); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, float x, float y) |
+{ |
+ ASSERT(image); |
+ IntSize s = size(image); |
+ ExceptionCode ec; |
+ drawImage(image, x, y, s.width(), s.height(), ec); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, |
+ float x, float y, float width, float height, ExceptionCode& ec) |
+{ |
+ ASSERT(image); |
+ IntSize s = size(image); |
+ drawImage(image, FloatRect(0, 0, s.width(), s.height()), FloatRect(x, y, width, height), ec); |
+} |
+ |
+void CanvasRenderingContext2D::checkOrigin(const KURL& url) |
+{ |
+ RefPtr<SecurityOrigin> origin = SecurityOrigin::create(url); |
+ if (!m_canvas->document()->securityOrigin()->canAccess(origin.get())) |
+ m_canvas->setOriginTainted(); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLImageElement* image, const FloatRect& srcRect, const FloatRect& dstRect, |
+ ExceptionCode& ec) |
+{ |
+ ASSERT(image); |
+ |
+ ec = 0; |
+ |
+ FloatRect imageRect = FloatRect(FloatPoint(), size(image)); |
+ if (!imageRect.contains(normalizeRect(srcRect)) || srcRect.width() == 0 || srcRect.height() == 0) { |
+ ec = INDEX_SIZE_ERR; |
+ return; |
+ } |
+ |
+ if (!dstRect.width() || !dstRect.height()) |
+ return; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ CachedImage* cachedImage = image->cachedImage(); |
+ if (!cachedImage) |
+ return; |
+ |
+ if (m_canvas->originClean()) |
+ checkOrigin(cachedImage->response().url()); |
+ |
+ if (m_canvas->originClean() && !cachedImage->image()->hasSingleSecurityOrigin()) |
+ m_canvas->setOriginTainted(); |
+ |
+ FloatRect sourceRect = c->roundToDevicePixels(srcRect); |
+ FloatRect destRect = c->roundToDevicePixels(dstRect); |
+ willDraw(destRect); |
+ c->drawImage(cachedImage->image(), destRect, sourceRect, state().m_globalComposite); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, float x, float y) |
+{ |
+ ASSERT(canvas); |
+ ExceptionCode ec; |
+ drawImage(canvas, x, y, canvas->width(), canvas->height(), ec); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, |
+ float x, float y, float width, float height, ExceptionCode& ec) |
+{ |
+ ASSERT(canvas); |
+ drawImage(canvas, FloatRect(0, 0, canvas->width(), canvas->height()), FloatRect(x, y, width, height), ec); |
+} |
+ |
+void CanvasRenderingContext2D::drawImage(HTMLCanvasElement* canvas, const FloatRect& srcRect, |
+ const FloatRect& dstRect, ExceptionCode& ec) |
+{ |
+ ASSERT(canvas); |
+ |
+ ec = 0; |
+ |
+ FloatRect srcCanvasRect = FloatRect(FloatPoint(), canvas->size()); |
+ if (!srcCanvasRect.contains(normalizeRect(srcRect)) || srcRect.width() == 0 || srcRect.height() == 0) { |
+ ec = INDEX_SIZE_ERR; |
+ return; |
+ } |
+ |
+ if (!dstRect.width() || !dstRect.height()) |
+ return; |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ FloatRect sourceRect = c->roundToDevicePixels(srcRect); |
+ FloatRect destRect = c->roundToDevicePixels(dstRect); |
+ |
+ // FIXME: Do this through platform-independent GraphicsContext API. |
+ ImageBuffer* buffer = canvas->buffer(); |
+ if (!buffer) |
+ return; |
+ |
+ if (!canvas->originClean()) |
+ m_canvas->setOriginTainted(); |
+ |
+ c->drawImage(buffer->image(), destRect, sourceRect, state().m_globalComposite); |
+ willDraw(destRect); // This call comes after drawImage, since the buffer we draw into may be our own, and we need to make sure it is dirty. |
+ // FIXME: Arguably willDraw should become didDraw and occur after drawing calls and not before them to avoid problems like this. |
+} |
+ |
+// FIXME: Why isn't this just another overload of drawImage? Why have a different name? |
+void CanvasRenderingContext2D::drawImageFromRect(HTMLImageElement* image, |
+ float sx, float sy, float sw, float sh, |
+ float dx, float dy, float dw, float dh, |
+ const String& compositeOperation) |
+{ |
+ if (!image) |
+ return; |
+ |
+ CachedImage* cachedImage = image->cachedImage(); |
+ if (!cachedImage) |
+ return; |
+ |
+ if (m_canvas->originClean()) |
+ checkOrigin(cachedImage->response().url()); |
+ |
+ if (m_canvas->originClean() && !cachedImage->image()->hasSingleSecurityOrigin()) |
+ m_canvas->setOriginTainted(); |
+ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ CompositeOperator op; |
+ if (!parseCompositeOperator(compositeOperation, op)) |
+ op = CompositeSourceOver; |
+ |
+ FloatRect destRect = FloatRect(dx, dy, dw, dh); |
+ willDraw(destRect); |
+ c->drawImage(cachedImage->image(), destRect, FloatRect(sx, sy, sw, sh), op); |
+} |
+ |
+void CanvasRenderingContext2D::setAlpha(float alpha) |
+{ |
+ setGlobalAlpha(alpha); |
+} |
+ |
+void CanvasRenderingContext2D::setCompositeOperation(const String& operation) |
+{ |
+ setGlobalCompositeOperation(operation); |
+} |
+ |
+PassRefPtr<CanvasGradient> CanvasRenderingContext2D::createLinearGradient(float x0, float y0, float x1, float y1, ExceptionCode& ec) |
+{ |
+ if (!isfinite(x0) || !isfinite(y0) || !isfinite(x1) || !isfinite(y1)) { |
+ ec = NOT_SUPPORTED_ERR; |
+ return 0; |
+ } |
+ |
+ return CanvasGradient::create(FloatPoint(x0, y0), FloatPoint(x1, y1)); |
+} |
+ |
+PassRefPtr<CanvasGradient> CanvasRenderingContext2D::createRadialGradient(float x0, float y0, float r0, float x1, float y1, float r1, ExceptionCode& ec) |
+{ |
+ if (!isfinite(x0) || !isfinite(y0) || !isfinite(r0) || |
+ !isfinite(x1) || !isfinite(y1) || !isfinite(r1)) { |
+ ec = NOT_SUPPORTED_ERR; |
+ return 0; |
+ } |
+ return CanvasGradient::create(FloatPoint(x0, y0), r0, FloatPoint(x1, y1), r1); |
+} |
+ |
+PassRefPtr<CanvasPattern> CanvasRenderingContext2D::createPattern(HTMLImageElement* image, |
+ const String& repetitionType, ExceptionCode& ec) |
+{ |
+ bool repeatX, repeatY; |
+ ec = 0; |
+ CanvasPattern::parseRepetitionType(repetitionType, repeatX, repeatY, ec); |
+ if (ec) |
+ return 0; |
+ |
+ if (!image->complete()) { |
+ ec = INVALID_STATE_ERR; |
+ return 0; |
+ } |
+ |
+ CachedImage* cachedImage = image->cachedImage(); |
+ if (!cachedImage || !image->cachedImage()->image()) |
+ return CanvasPattern::create(Image::nullImage(), repeatX, repeatY, true); |
+ |
+ RefPtr<SecurityOrigin> origin = SecurityOrigin::createFromString(cachedImage->url()); |
+ bool originClean = m_canvas->document()->securityOrigin()->canAccess(origin.get()); |
+ return CanvasPattern::create(cachedImage->image(), repeatX, repeatY, originClean); |
+} |
+ |
+PassRefPtr<CanvasPattern> CanvasRenderingContext2D::createPattern(HTMLCanvasElement* canvas, |
+ const String& repetitionType, ExceptionCode& ec) |
+{ |
+ if (!canvas->width() || !canvas->height()) { |
+ ec = INVALID_STATE_ERR; |
+ return 0; |
+ } |
+ |
+ bool repeatX, repeatY; |
+ ec = 0; |
+ CanvasPattern::parseRepetitionType(repetitionType, repeatX, repeatY, ec); |
+ if (ec) |
+ return 0; |
+ return CanvasPattern::create(canvas->buffer()->image(), repeatX, repeatY, canvas->originClean()); |
+} |
+ |
+void CanvasRenderingContext2D::willDraw(const FloatRect& r, unsigned options) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ FloatRect dirtyRect = r; |
+ if (options & CanvasWillDrawApplyTransform) { |
+ TransformationMatrix ctm = state().m_transform; |
+ dirtyRect = ctm.mapRect(r); |
+ } |
+ |
+ if (options & CanvasWillDrawApplyShadow) { |
+ // The shadow gets applied after transformation |
+ FloatRect shadowRect(dirtyRect); |
+ shadowRect.move(state().m_shadowOffset); |
+ shadowRect.inflate(state().m_shadowBlur); |
+ dirtyRect.unite(shadowRect); |
+ } |
+ |
+ if (options & CanvasWillDrawApplyClip) { |
+ // FIXME: apply the current clip to the rectangle. Unfortunately we can't get the clip |
+ // back out of the GraphicsContext, so to take clip into account for incremental painting, |
+ // we'd have to keep the clip path around. |
+ } |
+ |
+ m_canvas->willDraw(dirtyRect); |
+} |
+ |
+GraphicsContext* CanvasRenderingContext2D::drawingContext() const |
+{ |
+ return m_canvas->drawingContext(); |
+} |
+ |
+static PassRefPtr<ImageData> createEmptyImageData(const IntSize& size) |
+{ |
+ RefPtr<ImageData> data = ImageData::create(size.width(), size.height()); |
+ memset(data->data()->data()->data(), 0, data->data()->data()->length()); |
+ return data.get(); |
+} |
+ |
+PassRefPtr<ImageData> CanvasRenderingContext2D::createImageData(float sw, float sh) const |
+{ |
+ FloatSize unscaledSize(sw, sh); |
+ IntSize scaledSize = m_canvas->convertLogicalToDevice(unscaledSize); |
+ if (scaledSize.width() < 1) |
+ scaledSize.setWidth(1); |
+ if (scaledSize.height() < 1) |
+ scaledSize.setHeight(1); |
+ |
+ return createEmptyImageData(scaledSize); |
+} |
+ |
+PassRefPtr<ImageData> CanvasRenderingContext2D::getImageData(float sx, float sy, float sw, float sh, ExceptionCode& ec) const |
+{ |
+ if (!m_canvas->originClean()) { |
+ ec = SECURITY_ERR; |
+ return 0; |
+ } |
+ |
+ FloatRect unscaledRect(sx, sy, sw, sh); |
+ IntRect scaledRect = m_canvas->convertLogicalToDevice(unscaledRect); |
+ if (scaledRect.width() < 1) |
+ scaledRect.setWidth(1); |
+ if (scaledRect.height() < 1) |
+ scaledRect.setHeight(1); |
+ ImageBuffer* buffer = m_canvas ? m_canvas->buffer() : 0; |
+ if (!buffer) |
+ return createEmptyImageData(scaledRect.size()); |
+ return buffer->getImageData(scaledRect); |
+} |
+ |
+void CanvasRenderingContext2D::putImageData(ImageData* data, float dx, float dy, ExceptionCode& ec) |
+{ |
+ if (!data) { |
+ ec = TYPE_MISMATCH_ERR; |
+ return; |
+ } |
+ putImageData(data, dx, dy, 0, 0, data->width(), data->height(), ec); |
+} |
+ |
+void CanvasRenderingContext2D::putImageData(ImageData* data, float dx, float dy, float dirtyX, float dirtyY, |
+ float dirtyWidth, float dirtyHeight, ExceptionCode& ec) |
+{ |
+ if (!data) { |
+ ec = TYPE_MISMATCH_ERR; |
+ return; |
+ } |
+ if (!isfinite(dx) || !isfinite(dy) || !isfinite(dirtyX) || |
+ !isfinite(dirtyY) || !isfinite(dirtyWidth) || !isfinite(dirtyHeight)) { |
+ ec = INDEX_SIZE_ERR; |
+ return; |
+ } |
+ |
+ ImageBuffer* buffer = m_canvas->buffer(); |
+ if (!buffer) |
+ return; |
+ |
+ if (dirtyWidth < 0) { |
+ dirtyX += dirtyWidth; |
+ dirtyWidth = -dirtyWidth; |
+ } |
+ |
+ if (dirtyHeight < 0) { |
+ dirtyY += dirtyHeight; |
+ dirtyHeight = -dirtyHeight; |
+ } |
+ |
+ FloatRect clipRect(dirtyX, dirtyY, dirtyWidth, dirtyHeight); |
+ clipRect.intersect(IntRect(0, 0, data->width(), data->height())); |
+ IntSize destOffset(static_cast<int>(dx), static_cast<int>(dy)); |
+ IntRect sourceRect = enclosingIntRect(clipRect); |
+ sourceRect.move(destOffset); |
+ sourceRect.intersect(IntRect(IntPoint(), buffer->size())); |
+ if (sourceRect.isEmpty()) |
+ return; |
+ willDraw(sourceRect, 0); // ignore transform, shadow and clip |
+ sourceRect.move(-destOffset); |
+ IntPoint destPoint(destOffset.width(), destOffset.height()); |
+ |
+ buffer->putImageData(data, sourceRect, destPoint); |
+} |
+ |
+String CanvasRenderingContext2D::font() const |
+{ |
+ return state().m_unparsedFont; |
+} |
+ |
+void CanvasRenderingContext2D::setFont(const String& newFont) |
+{ |
+ RefPtr<CSSMutableStyleDeclaration> tempDecl = CSSMutableStyleDeclaration::create(); |
+ CSSParser parser(!m_canvas->document()->inCompatMode()); // Use the parse mode of the canvas' document when parsing CSS. |
+ |
+ String declarationText("font: "); |
+ declarationText += newFont; |
+ parser.parseDeclaration(tempDecl.get(), declarationText); |
+ if (!tempDecl->length()) |
+ return; |
+ |
+ // The parse succeeded. |
+ state().m_unparsedFont = newFont; |
+ |
+ // Map the <canvas> font into the text style. If the font uses keywords like larger/smaller, these will work |
+ // relative to the canvas. |
+ RefPtr<RenderStyle> newStyle = RenderStyle::create(); |
+ if (m_canvas->computedStyle()) |
+ newStyle->setFontDescription(m_canvas->computedStyle()->fontDescription()); |
+ |
+ // Now map the font property into the style. |
+ CSSStyleSelector* styleSelector = m_canvas->document()->styleSelector(); |
+ styleSelector->applyPropertyToStyle(CSSPropertyFont, tempDecl->getPropertyCSSValue(CSSPropertyFont).get(), newStyle.get()); |
+ |
+ state().m_font = newStyle->font(); |
+ state().m_font.update(styleSelector->fontSelector()); |
+ state().m_realizedFont = true; |
+} |
+ |
+String CanvasRenderingContext2D::textAlign() const |
+{ |
+ return textAlignName(state().m_textAlign); |
+} |
+ |
+void CanvasRenderingContext2D::setTextAlign(const String& s) |
+{ |
+ TextAlign align; |
+ if (!parseTextAlign(s, align)) |
+ return; |
+ state().m_textAlign = align; |
+} |
+ |
+String CanvasRenderingContext2D::textBaseline() const |
+{ |
+ return textBaselineName(state().m_textBaseline); |
+} |
+ |
+void CanvasRenderingContext2D::setTextBaseline(const String& s) |
+{ |
+ TextBaseline baseline; |
+ if (!parseTextBaseline(s, baseline)) |
+ return; |
+ state().m_textBaseline = baseline; |
+} |
+ |
+void CanvasRenderingContext2D::fillText(const String& text, float x, float y) |
+{ |
+ drawTextInternal(text, x, y, true); |
+} |
+ |
+void CanvasRenderingContext2D::fillText(const String& text, float x, float y, float maxWidth) |
+{ |
+ drawTextInternal(text, x, y, true, maxWidth, true); |
+} |
+ |
+void CanvasRenderingContext2D::strokeText(const String& text, float x, float y) |
+{ |
+ drawTextInternal(text, x, y, false); |
+} |
+ |
+void CanvasRenderingContext2D::strokeText(const String& text, float x, float y, float maxWidth) |
+{ |
+ drawTextInternal(text, x, y, false, maxWidth, true); |
+} |
+ |
+PassRefPtr<TextMetrics> CanvasRenderingContext2D::measureText(const String& text) |
+{ |
+ RefPtr<TextMetrics> metrics = TextMetrics::create(); |
+ metrics->setWidth(accessFont().width(TextRun(text.characters(), text.length()))); |
+ return metrics; |
+} |
+ |
+void CanvasRenderingContext2D::drawTextInternal(const String& text, float x, float y, bool fill, float /*maxWidth*/, bool /*useMaxWidth*/) |
+{ |
+ GraphicsContext* c = drawingContext(); |
+ if (!c) |
+ return; |
+ if (!state().m_invertibleCTM) |
+ return; |
+ |
+ const Font& font = accessFont(); |
+ |
+ // FIXME: Handle maxWidth. |
+ // FIXME: Need to turn off font smoothing. |
+ |
+ bool rtl = m_canvas->computedStyle() ? m_canvas->computedStyle()->direction() == RTL : false; |
+ bool override = m_canvas->computedStyle() ? m_canvas->computedStyle()->unicodeBidi() == Override : false; |
+ |
+ unsigned length = text.length(); |
+ const UChar* string = text.characters(); |
+ TextRun textRun(string, length, 0, 0, 0, rtl, override, false, false); |
+ |
+ // Draw the item text at the correct point. |
+ FloatPoint location(x, y); |
+ switch (state().m_textBaseline) { |
+ case TopTextBaseline: |
+ case HangingTextBaseline: |
+ location.setY(y + font.ascent()); |
+ break; |
+ case BottomTextBaseline: |
+ case IdeographicTextBaseline: |
+ location.setY(y - font.descent()); |
+ break; |
+ case MiddleTextBaseline: |
+ location.setY(y - font.descent() + font.height() / 2); |
+ break; |
+ case AlphabeticTextBaseline: |
+ default: |
+ // Do nothing. |
+ break; |
+ } |
+ |
+ float width = font.width(TextRun(text, false, 0, 0, rtl, override)); |
+ |
+ TextAlign align = state().m_textAlign; |
+ if (align == StartTextAlign) |
+ align = rtl ? RightTextAlign : LeftTextAlign; |
+ else if (align == EndTextAlign) |
+ align = rtl ? LeftTextAlign : RightTextAlign; |
+ |
+ switch (align) { |
+ case CenterTextAlign: |
+ location.setX(location.x() - width / 2); |
+ break; |
+ case RightTextAlign: |
+ location.setX(location.x() - width); |
+ break; |
+ default: |
+ break; |
+ } |
+ |
+ // The slop built in to this mask rect matches the heuristic used in FontCGWin.cpp for GDI text. |
+ FloatRect textRect = FloatRect(location.x() - font.height() / 2, location.y() - font.ascent() - font.lineGap(), |
+ width + font.height(), font.lineSpacing()); |
+ if (!fill) |
+ textRect.inflate(c->strokeThickness() / 2); |
+ |
+ if (fill) |
+ m_canvas->willDraw(textRect); |
+ else { |
+ // When stroking text, pointy miters can extend outside of textRect, so we |
+ // punt and dirty the whole canvas. |
+ m_canvas->willDraw(FloatRect(0, 0, m_canvas->width(), m_canvas->height())); |
+ } |
+ |
+ CanvasStyle* drawStyle = fill ? state().m_fillStyle.get() : state().m_strokeStyle.get(); |
+ if (drawStyle->canvasGradient() || drawStyle->canvasPattern()) { |
+ // FIXME: The rect is not big enough for miters on stroked text. |
+ IntRect maskRect = enclosingIntRect(textRect); |
+ |
+ auto_ptr<ImageBuffer> maskImage = ImageBuffer::create(maskRect.size(), false); |
+ |
+ GraphicsContext* maskImageContext = maskImage->context(); |
+ |
+ if (fill) |
+ maskImageContext->setFillColor(Color::black); |
+ else { |
+ maskImageContext->setStrokeColor(Color::black); |
+ maskImageContext->setStrokeThickness(c->strokeThickness()); |
+ } |
+ |
+ maskImageContext->setTextDrawingMode(fill ? cTextFill : cTextStroke); |
+ maskImageContext->translate(-maskRect.x(), -maskRect.y()); |
+ |
+ maskImageContext->drawBidiText(font, textRun, location); |
+ |
+ c->save(); |
+ c->clipToImageBuffer(maskRect, maskImage.get()); |
+ drawStyle->applyFillColor(c); |
+ c->fillRect(maskRect); |
+ c->restore(); |
+ |
+ return; |
+ } |
+ |
+ c->setTextDrawingMode(fill ? cTextFill : cTextStroke); |
+ c->drawBidiText(font, textRun, location); |
+} |
+ |
+const Font& CanvasRenderingContext2D::accessFont() |
+{ |
+ if (!state().m_realizedFont) |
+ setFont(state().m_unparsedFont); |
+ return state().m_font; |
+} |
+ |
+} // namespace WebCore |