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Diffstat (limited to 'WebCore/platform/graphics/GraphicsContext.cpp')
-rw-r--r-- | WebCore/platform/graphics/GraphicsContext.cpp | 507 |
1 files changed, 507 insertions, 0 deletions
diff --git a/WebCore/platform/graphics/GraphicsContext.cpp b/WebCore/platform/graphics/GraphicsContext.cpp new file mode 100644 index 0000000..9cd2969 --- /dev/null +++ b/WebCore/platform/graphics/GraphicsContext.cpp @@ -0,0 +1,507 @@ +/* + * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. + * + * 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 "GraphicsContext.h" + +#include "BidiResolver.h" +#include "Generator.h" +#include "GraphicsContextPrivate.h" +#include "Font.h" +#include "NotImplemented.h" + +using namespace std; + +namespace WebCore { + +class TextRunIterator { +public: + TextRunIterator() + : m_textRun(0) + , m_offset(0) + { + } + + TextRunIterator(const TextRun* textRun, unsigned offset) + : m_textRun(textRun) + , m_offset(offset) + { + } + + TextRunIterator(const TextRunIterator& other) + : m_textRun(other.m_textRun) + , m_offset(other.m_offset) + { + } + + unsigned offset() const { return m_offset; } + void increment() { m_offset++; } + bool atEnd() const { return !m_textRun || m_offset >= m_textRun->length(); } + UChar current() const { return (*m_textRun)[m_offset]; } + WTF::Unicode::Direction direction() const { return atEnd() ? WTF::Unicode::OtherNeutral : WTF::Unicode::direction(current()); } + + bool operator==(const TextRunIterator& other) + { + return m_offset == other.m_offset && m_textRun == other.m_textRun; + } + + bool operator!=(const TextRunIterator& other) { return !operator==(other); } + +private: + const TextRun* m_textRun; + int m_offset; +}; + +GraphicsContextPrivate* GraphicsContext::createGraphicsContextPrivate() +{ + return new GraphicsContextPrivate; +} + +void GraphicsContext::destroyGraphicsContextPrivate(GraphicsContextPrivate* deleteMe) +{ + delete deleteMe; +} + +void GraphicsContext::save() +{ + if (paintingDisabled()) + return; + + m_common->stack.append(m_common->state); + + savePlatformState(); +} + +void GraphicsContext::restore() +{ + if (paintingDisabled()) + return; + + if (m_common->stack.isEmpty()) { + LOG_ERROR("ERROR void GraphicsContext::restore() stack is empty"); + return; + } + m_common->state = m_common->stack.last(); + m_common->stack.removeLast(); + + restorePlatformState(); +} + +const Font& GraphicsContext::font() const +{ + return m_common->state.font; +} + +void GraphicsContext::setFont(const Font& aFont) +{ + m_common->state.font = aFont; + setPlatformFont(aFont); +} + +void GraphicsContext::setStrokeThickness(float thickness) +{ + m_common->state.strokeThickness = thickness; + setPlatformStrokeThickness(thickness); +} + +void GraphicsContext::setStrokeStyle(const StrokeStyle& style) +{ + m_common->state.strokeStyle = style; + setPlatformStrokeStyle(style); +} + +void GraphicsContext::setStrokeColor(const Color& color) +{ + m_common->state.strokeColorSpace = SolidColorSpace; + m_common->state.strokeColor = color; + setPlatformStrokeColor(color); +} + +void GraphicsContext::setShadow(const IntSize& size, int blur, const Color& color) +{ + m_common->state.shadowSize = size; + m_common->state.shadowBlur = blur; + m_common->state.shadowColor = color; + setPlatformShadow(size, blur, color); +} + +void GraphicsContext::clearShadow() +{ + m_common->state.shadowSize = IntSize(); + m_common->state.shadowBlur = 0; + m_common->state.shadowColor = Color(); + clearPlatformShadow(); +} + +bool GraphicsContext::getShadow(IntSize& size, int& blur, Color& color) const +{ + size = m_common->state.shadowSize; + blur = m_common->state.shadowBlur; + color = m_common->state.shadowColor; + + return color.isValid() && color.alpha() && (blur || size.width() || size.height()); +} + +float GraphicsContext::strokeThickness() const +{ + return m_common->state.strokeThickness; +} + +StrokeStyle GraphicsContext::strokeStyle() const +{ + return m_common->state.strokeStyle; +} + +Color GraphicsContext::strokeColor() const +{ + return m_common->state.strokeColor; +} + +WindRule GraphicsContext::fillRule() const +{ + return m_common->state.fillRule; +} + +void GraphicsContext::setFillRule(WindRule fillRule) +{ + m_common->state.fillRule = fillRule; +} + +GradientSpreadMethod GraphicsContext::spreadMethod() const +{ + return m_common->state.spreadMethod; +} + +void GraphicsContext::setSpreadMethod(GradientSpreadMethod spreadMethod) +{ + m_common->state.spreadMethod = spreadMethod; +} + +void GraphicsContext::setFillColor(const Color& color) +{ + m_common->state.fillColorSpace = SolidColorSpace; + m_common->state.fillColor = color; + setPlatformFillColor(color); +} + +Color GraphicsContext::fillColor() const +{ + return m_common->state.fillColor; +} + +void GraphicsContext::setStrokePattern(PassRefPtr<Pattern> pattern) +{ + ASSERT(pattern); + if (!pattern) { + setStrokeColor(Color::black); + return; + } + m_common->state.strokeColorSpace = PatternColorSpace; + m_common->state.strokePattern = pattern; +} + +void GraphicsContext::setFillPattern(PassRefPtr<Pattern> pattern) +{ + ASSERT(pattern); + if (!pattern) { + setFillColor(Color::black); + return; + } + m_common->state.fillColorSpace = PatternColorSpace; + m_common->state.fillPattern = pattern; +} + +void GraphicsContext::setStrokeGradient(PassRefPtr<Gradient> gradient) +{ + ASSERT(gradient); + if (!gradient) { + setStrokeColor(Color::black); + return; + } + m_common->state.strokeColorSpace = GradientColorSpace; + m_common->state.strokeGradient = gradient; +} + +void GraphicsContext::setFillGradient(PassRefPtr<Gradient> gradient) +{ + ASSERT(gradient); + if (!gradient) { + setFillColor(Color::black); + return; + } + m_common->state.fillColorSpace = GradientColorSpace; + m_common->state.fillGradient = gradient; +} + +bool GraphicsContext::updatingControlTints() const +{ + return m_common->m_updatingControlTints; +} + +void GraphicsContext::setUpdatingControlTints(bool b) +{ + setPaintingDisabled(b); + m_common->m_updatingControlTints = b; +} + +void GraphicsContext::setPaintingDisabled(bool f) +{ + m_common->state.paintingDisabled = f; +} + +bool GraphicsContext::paintingDisabled() const +{ + return m_common->state.paintingDisabled; +} + +void GraphicsContext::drawImage(Image* image, const IntPoint& p, CompositeOperator op) +{ + drawImage(image, p, IntRect(0, 0, -1, -1), op); +} + +void GraphicsContext::drawImage(Image* image, const IntRect& r, CompositeOperator op, bool useLowQualityScale) +{ + drawImage(image, r, IntRect(0, 0, -1, -1), op, useLowQualityScale); +} + +void GraphicsContext::drawImage(Image* image, const IntPoint& dest, const IntRect& srcRect, CompositeOperator op) +{ + drawImage(image, IntRect(dest, srcRect.size()), srcRect, op); +} + +void GraphicsContext::drawImage(Image* image, const IntRect& dest, const IntRect& srcRect, CompositeOperator op, bool useLowQualityScale) +{ + drawImage(image, FloatRect(dest), srcRect, op, useLowQualityScale); +} + +void GraphicsContext::drawText(const TextRun& run, const IntPoint& point, int from, int to) +{ + if (paintingDisabled()) + return; + + font().drawText(this, run, point, from, to); +} + +void GraphicsContext::drawBidiText(const TextRun& run, const FloatPoint& point) +{ + if (paintingDisabled()) + return; + + BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver; + WTF::Unicode::Direction paragraphDirection = run.ltr() ? WTF::Unicode::LeftToRight : WTF::Unicode::RightToLeft; + + bidiResolver.setStatus(BidiStatus(paragraphDirection, paragraphDirection, paragraphDirection, new BidiContext(run.ltr() ? 0 : 1, paragraphDirection, run.directionalOverride()))); + + bidiResolver.setPosition(TextRunIterator(&run, 0)); + bidiResolver.createBidiRunsForLine(TextRunIterator(&run, run.length())); + + if (!bidiResolver.runCount()) + return; + + FloatPoint currPoint = point; + BidiCharacterRun* bidiRun = bidiResolver.firstRun(); + while (bidiRun) { + + TextRun subrun = run; + subrun.setText(run.data(bidiRun->start()), bidiRun->stop() - bidiRun->start()); + subrun.setRTL(bidiRun->level() % 2); + subrun.setDirectionalOverride(bidiRun->dirOverride(false)); + + font().drawText(this, subrun, currPoint); + + bidiRun = bidiRun->next(); + // FIXME: Have Font::drawText return the width of what it drew so that we don't have to re-measure here. + if (bidiRun) + currPoint.move(font().floatWidth(subrun), 0.f); + } + + bidiResolver.deleteRuns(); +} + +void GraphicsContext::drawHighlightForText(const TextRun& run, const IntPoint& point, int h, const Color& backgroundColor, int from, int to) +{ + if (paintingDisabled()) + return; + + fillRect(font().selectionRectForText(run, point, h, from, to), backgroundColor); +} + +void GraphicsContext::initFocusRing(int width, int offset) +{ + if (paintingDisabled()) + return; + clearFocusRing(); + + m_common->m_focusRingWidth = width; + m_common->m_focusRingOffset = offset; +} + +void GraphicsContext::clearFocusRing() +{ + m_common->m_focusRingRects.clear(); +} + +IntRect GraphicsContext::focusRingBoundingRect() +{ + IntRect result = IntRect(0, 0, 0, 0); + + const Vector<IntRect>& rects = focusRingRects(); + unsigned rectCount = rects.size(); + for (unsigned i = 0; i < rectCount; i++) + result.unite(rects[i]); + + return result; +} + +void GraphicsContext::addFocusRingRect(const IntRect& rect) +{ + if (paintingDisabled() || rect.isEmpty()) + return; + m_common->m_focusRingRects.append(rect); +} + +int GraphicsContext::focusRingWidth() const +{ + return m_common->m_focusRingWidth; +} + +int GraphicsContext::focusRingOffset() const +{ + return m_common->m_focusRingOffset; +} + +const Vector<IntRect>& GraphicsContext::focusRingRects() const +{ + return m_common->m_focusRingRects; +} + +void GraphicsContext::drawImage(Image* image, const FloatRect& dest, const FloatRect& src, CompositeOperator op, bool useLowQualityScale) +{ + if (paintingDisabled() || !image) + return; + + float tsw = src.width(); + float tsh = src.height(); + float tw = dest.width(); + float th = dest.height(); + + if (tsw == -1) + tsw = image->width(); + if (tsh == -1) + tsh = image->height(); + + if (tw == -1) + tw = image->width(); + if (th == -1) + th = image->height(); + + if (useLowQualityScale) { + save(); + setImageInterpolationQuality(InterpolationNone); + } + image->draw(this, FloatRect(dest.location(), FloatSize(tw, th)), FloatRect(src.location(), FloatSize(tsw, tsh)), op); + if (useLowQualityScale) + restore(); +} + +void GraphicsContext::drawTiledImage(Image* image, const IntRect& rect, const IntPoint& srcPoint, const IntSize& tileSize, CompositeOperator op) +{ + if (paintingDisabled() || !image) + return; + + image->drawTiled(this, rect, srcPoint, tileSize, op); +} + +void GraphicsContext::drawTiledImage(Image* image, const IntRect& dest, const IntRect& srcRect, Image::TileRule hRule, Image::TileRule vRule, CompositeOperator op) +{ + if (paintingDisabled() || !image) + return; + + if (hRule == Image::StretchTile && vRule == Image::StretchTile) + // Just do a scale. + return drawImage(image, dest, srcRect, op); + + image->drawTiled(this, dest, srcRect, hRule, vRule, op); +} + +void GraphicsContext::addRoundedRectClip(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, + const IntSize& bottomLeft, const IntSize& bottomRight) +{ + if (paintingDisabled()) + return; + + clip(Path::createRoundedRectangle(rect, topLeft, topRight, bottomLeft, bottomRight)); +} + +void GraphicsContext::clipOutRoundedRect(const IntRect& rect, const IntSize& topLeft, const IntSize& topRight, + const IntSize& bottomLeft, const IntSize& bottomRight) +{ + if (paintingDisabled()) + return; + + clipOut(Path::createRoundedRectangle(rect, topLeft, topRight, bottomLeft, bottomRight)); +} + +int GraphicsContext::textDrawingMode() +{ + return m_common->state.textDrawingMode; +} + +void GraphicsContext::setTextDrawingMode(int mode) +{ + m_common->state.textDrawingMode = mode; + if (paintingDisabled()) + return; + setPlatformTextDrawingMode(mode); +} + +void GraphicsContext::fillRect(const FloatRect& rect, Generator& generator) +{ + if (paintingDisabled()) + return; + generator.fill(this, rect); +} + +#if !PLATFORM(CG) && !PLATFORM(SKIA) +// Implement this if you want to go ahead and push the drawing mode into your native context +// immediately. +void GraphicsContext::setPlatformTextDrawingMode(int mode) +{ +} +#endif + +#if !PLATFORM(QT) && !PLATFORM(CAIRO) && !PLATFORM(SKIA) +void GraphicsContext::setPlatformStrokeStyle(const StrokeStyle&) +{ +} +#endif + +#if !PLATFORM(QT) +void GraphicsContext::setPlatformFont(const Font&) +{ +} +#endif + +} |