blob: 0ee0c85b4b05316597dde3b5642506d6c70d4f16 [file] [log] [blame]
/*
* (C) 1999 Lars Knoll (knoll@kde.org)
* (C) 2000 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2004-2017 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#pragma once
#include "AffineTransform.h"
#include "FloatRect.h"
#include "GlyphDisplayListCache.h"
#include "TextFlags.h"
#include "TextPaintStyle.h"
#include <wtf/text/AtomicString.h>
namespace WebCore {
class FilterOperations;
class FontCascade;
class RenderCombineText;
class ShadowData;
class TextRun;
struct TextPaintStyle;
enum RotationDirection { Counterclockwise, Clockwise };
static inline AffineTransform rotation(const FloatRect& boxRect, RotationDirection clockwise)
{
return clockwise ? AffineTransform(0, 1, -1, 0, boxRect.x() + boxRect.maxY(), boxRect.maxY() - boxRect.x())
: AffineTransform(0, -1, 1, 0, boxRect.x() - boxRect.maxY(), boxRect.x() + boxRect.maxY());
}
class TextPainter {
public:
TextPainter(GraphicsContext&);
void setStyle(const TextPaintStyle& textPaintStyle) { m_style = textPaintStyle; }
void setShadow(const ShadowData* shadow) { m_shadow = shadow; }
void setShadowColorFilter(const FilterOperations* colorFilter) { m_shadowColorFilter = colorFilter; }
void setFont(const FontCascade& font) { m_font = &font; }
void setIsHorizontal(bool isHorizontal) { m_textBoxIsHorizontal = isHorizontal; }
void setEmphasisMark(const AtomicString& mark, float offset, const RenderCombineText*);
void paint(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin);
void paintRange(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned start, unsigned end);
template<typename LayoutRun>
void setGlyphDisplayListIfNeeded(const LayoutRun& run, const PaintInfo& paintInfo, const FontCascade& font, GraphicsContext& context, const TextRun& textRun)
{
if (!TextPainter::shouldUseGlyphDisplayList(paintInfo))
TextPainter::removeGlyphDisplayList(run);
else
m_glyphDisplayList = GlyphDisplayListCache<LayoutRun>::singleton().get(run, font, context, textRun);
}
template<typename LayoutRun>
static void removeGlyphDisplayList(const LayoutRun& run) { GlyphDisplayListCache<LayoutRun>::singleton().remove(run); }
static void clearGlyphDisplayLists();
static bool shouldUseGlyphDisplayList(const PaintInfo&);
private:
void paintTextOrEmphasisMarks(const FontCascade&, const TextRun&, const AtomicString& emphasisMark, float emphasisMarkOffset,
const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset);
void paintTextWithShadows(const ShadowData*, const FilterOperations*, const FontCascade&, const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin,
unsigned startOffset, unsigned endOffset, const AtomicString& emphasisMark, float emphasisMarkOffset, bool stroked);
void paintTextAndEmphasisMarksIfNeeded(const TextRun&, const FloatRect& boxRect, const FloatPoint& textOrigin, unsigned startOffset, unsigned endOffset,
const TextPaintStyle&, const ShadowData*, const FilterOperations*);
GraphicsContext& m_context;
const FontCascade* m_font { nullptr };
TextPaintStyle m_style;
AtomicString m_emphasisMark;
const ShadowData* m_shadow { nullptr };
const FilterOperations* m_shadowColorFilter { nullptr };
const RenderCombineText* m_combinedText { nullptr };
DisplayList::DisplayList* m_glyphDisplayList { nullptr };
float m_emphasisMarkOffset { 0 };
bool m_textBoxIsHorizontal { true };
};
inline void TextPainter::setEmphasisMark(const AtomicString& mark, float offset, const RenderCombineText* combinedText)
{
m_emphasisMark = mark;
m_emphasisMarkOffset = offset;
m_combinedText = combinedText;
}
class ShadowApplier {
public:
ShadowApplier(GraphicsContext&, const ShadowData*, const FilterOperations* colorFilter, const FloatRect& textRect, bool lastShadowIterationShouldDrawText = true, bool opaque = false, FontOrientation = FontOrientation::Horizontal);
FloatSize extraOffset() const { return m_extraOffset; }
bool nothingToDraw() const { return m_nothingToDraw; }
bool didSaveContext() const { return m_didSaveContext; }
~ShadowApplier();
private:
bool isLastShadowIteration();
bool shadowIsCompletelyCoveredByText(bool textIsOpaque);
FloatSize m_extraOffset;
GraphicsContext& m_context;
const ShadowData* m_shadow;
bool m_onlyDrawsShadow : 1;
bool m_avoidDrawingShadow : 1;
bool m_nothingToDraw : 1;
bool m_didSaveContext : 1;
};
} // namespace WebCore