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Diffstat (limited to 'libs/hwui/font/Font.h')
-rw-r--r-- | libs/hwui/font/Font.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/libs/hwui/font/Font.h b/libs/hwui/font/Font.h new file mode 100644 index 0000000..7cab31e --- /dev/null +++ b/libs/hwui/font/Font.h @@ -0,0 +1,130 @@ +/* + * 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" + +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 + }; + + ~Font(); + + /** + * Renders the specified string of text. + * If bitmap is specified, it will be used as the render target + */ + void render(SkPaint* paint, const char *text, uint32_t start, uint32_t len, + int numGlyphs, int x, int y, uint8_t *bitmap = NULL, + uint32_t bitmapW = 0, uint32_t bitmapH = 0); + + 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); + + /** + * Creates a new font associated with the specified font state. + */ + static Font* create(FontRenderer* state, uint32_t fontId, float fontSize, + int flags, uint32_t italicStyle, uint32_t scaleX, SkPaint::Style style, + uint32_t strokeWidth); + +private: + friend class FontRenderer; + 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); + + Font(FontRenderer* state, uint32_t fontId, float fontSize, int flags, uint32_t italicStyle, + uint32_t scaleX, SkPaint::Style style, uint32_t strokeWidth); + + // Cache of glyphs + DefaultKeyedVector<glyph_t, CachedGlyphInfo*> mCachedGlyphs; + + 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 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; + uint32_t mFontId; + float mFontSize; + int mFlags; + uint32_t mItalicStyle; + uint32_t mScaleX; + SkPaint::Style mStyle; + uint32_t mStrokeWidth; +}; + +}; // namespace uirenderer +}; // namespace android + +#endif // ANDROID_HWUI_FONT_H |