SVGRenderingContext.h [plain text]
#pragma once
#include "ImageBuffer.h"
#include "PaintInfo.h"
namespace WebCore {
class AffineTransform;
class FloatRect;
class RenderElement;
class RenderObject;
class RenderSVGResourceFilter;
class SVGRenderingContext {
public:
enum NeedsGraphicsContextSave {
SaveGraphicsContext,
DontSaveGraphicsContext,
};
SVGRenderingContext()
: m_renderingFlags(0)
, m_renderer(nullptr)
, m_paintInfo(nullptr)
, m_savedContext(nullptr)
, m_filter(nullptr)
{
}
SVGRenderingContext(RenderElement& object, PaintInfo& paintinfo, NeedsGraphicsContextSave needsGraphicsContextSave = DontSaveGraphicsContext)
: m_renderingFlags(0)
, m_renderer(nullptr)
, m_paintInfo(nullptr)
, m_savedContext(nullptr)
, m_filter(nullptr)
{
prepareToRenderSVGContent(object, paintinfo, needsGraphicsContextSave);
}
~SVGRenderingContext();
void prepareToRenderSVGContent(RenderElement&, PaintInfo&, NeedsGraphicsContextSave = DontSaveGraphicsContext);
bool isRenderingPrepared() const { return m_renderingFlags & RenderingPrepared; }
static std::unique_ptr<ImageBuffer> createImageBuffer(const FloatRect& targetRect, const AffineTransform& absoluteTransform, ColorSpace, RenderingMode);
static std::unique_ptr<ImageBuffer> createImageBuffer(const FloatRect& targetRect, const FloatRect& clampedRect, ColorSpace, RenderingMode);
static void renderSubtreeToImageBuffer(ImageBuffer*, RenderElement&, const AffineTransform&);
static void clipToImageBuffer(GraphicsContext&, const AffineTransform& absoluteTransform, const FloatRect& targetRect, std::unique_ptr<ImageBuffer>&, bool safeToClear);
static float calculateScreenFontSizeScalingFactor(const RenderObject&);
static AffineTransform calculateTransformationToOutermostCoordinateSystem(const RenderObject&);
static void clear2DRotation(AffineTransform&);
static IntRect calculateImageBufferRect(const FloatRect& targetRect, const AffineTransform& absoluteTransform)
{
return enclosingIntRect(absoluteTransform.mapRect(targetRect));
}
bool bufferForeground(std::unique_ptr<ImageBuffer>&);
private:
enum RenderingFlags {
RenderingPrepared = 1,
RestoreGraphicsContext = 1 << 1,
EndOpacityLayer = 1 << 2,
EndShadowLayer = 1 << 3,
EndFilterLayer = 1 << 4,
PrepareToRenderSVGContentWasCalled = 1 << 5
};
const static int ActionsNeeded = RestoreGraphicsContext | EndOpacityLayer | EndShadowLayer | EndFilterLayer;
int m_renderingFlags;
RenderElement* m_renderer;
PaintInfo* m_paintInfo;
GraphicsContext* m_savedContext;
LayoutRect m_savedPaintRect;
RenderSVGResourceFilter* m_filter;
};
}