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/*
* Copyright (C) 2012 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HWUI_FONT_H
#define ANDROID_HWUI_FONT_H
#include <utils/KeyedVector.h>
#include <SkScalerContext.h>
#include <SkPaint.h>
#include <SkPathMeasure.h>
#include "CachedGlyphInfo.h"
#include "../Rect.h"
#include "../Matrix.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Font
///////////////////////////////////////////////////////////////////////////////
class FontRenderer;
/**
* Represents a font, defined by a Skia font id and a font size. A font is used
* to generate glyphs and cache them in the FontState.
*/
class Font {
public:
enum Style {
kFakeBold = 1
};
struct FontDescription {
FontDescription(const SkPaint* paint, const mat4& matrix);
static int compare(const FontDescription& lhs, const FontDescription& rhs);
hash_t hash() const;
bool operator==(const FontDescription& other) const {
return compare(*this, other) == 0;
}
bool operator!=(const FontDescription& other) const {
return compare(*this, other) != 0;
}
SkFontID mFontId;
float mFontSize;
int mFlags;
float mItalicStyle;
float mScaleX;
uint8_t mStyle;
float mStrokeWidth;
bool mAntiAliasing;
uint8_t mHinting;
SkMatrix mLookupTransform;
SkMatrix mInverseLookupTransform;
};
~Font();
void render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, const float* positions);
void render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, SkPath* path, float hOffset, float vOffset);
const Font::FontDescription& getDescription() const {
return mDescription;
}
/**
* Creates a new font associated with the specified font state.
*/
static Font* create(FontRenderer* state, const SkPaint* paint, const mat4& matrix);
private:
friend class FontRenderer;
Font(FontRenderer* state, const Font::FontDescription& desc);
typedef void (Font::*RenderGlyph)(CachedGlyphInfo*, int, int, uint8_t*,
uint32_t, uint32_t, Rect*, const float*);
enum RenderMode {
FRAMEBUFFER,
BITMAP,
MEASURE,
};
void precache(SkPaint* paint, const char* text, int numGlyphs);
void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect *bounds, const float* positions);
void measure(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, Rect *bounds, const float* positions);
void invalidateTextureCache(CacheTexture* cacheTexture = NULL);
CachedGlyphInfo* cacheGlyph(SkPaint* paint, glyph_t glyph, bool precaching);
void updateGlyphCache(SkPaint* paint, const SkGlyph& skiaGlyph, CachedGlyphInfo* glyph,
bool precaching);
void measureCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyphTransformed(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyphBitmap(CachedGlyphInfo* glyph, int x, int y,
uint8_t *bitmap, uint32_t bitmapW, uint32_t bitmapH,
Rect* bounds, const float* pos);
void drawCachedGlyph(CachedGlyphInfo* glyph, float x, float hOffset, float vOffset,
SkPathMeasure& measure, SkPoint* position, SkVector* tangent);
CachedGlyphInfo* getCachedGlyph(SkPaint* paint, glyph_t textUnit, bool precaching = false);
FontRenderer* mState;
FontDescription mDescription;
// Cache of glyphs
DefaultKeyedVector<glyph_t, CachedGlyphInfo*> mCachedGlyphs;
bool mIdentityTransform;
};
inline int strictly_order_type(const Font::FontDescription& lhs,
const Font::FontDescription& rhs) {
return Font::FontDescription::compare(lhs, rhs) < 0;
}
inline int compare_type(const Font::FontDescription& lhs, const Font::FontDescription& rhs) {
return Font::FontDescription::compare(lhs, rhs);
}
inline hash_t hash_type(const Font::FontDescription& entry) {
return entry.hash();
}
}; // namespace uirenderer
}; // namespace android
#endif // ANDROID_HWUI_FONT_H
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