| /* |
| * Copyright (C) 2009 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_RS_FONT_H |
| #define ANDROID_RS_FONT_H |
| |
| #include "RenderScript.h" |
| #include "rsStream.h" |
| #include <utils/String8.h> |
| #include <utils/Vector.h> |
| #include <utils/KeyedVector.h> |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| |
| // --------------------------------------------------------------------------- |
| namespace android { |
| |
| namespace renderscript { |
| |
| class FontState; |
| |
| class Font : public ObjectBase |
| { |
| public: |
| ~Font(); |
| |
| // Pointer to the utf data, length of data, where to start, number of glyphs ot read |
| // (each glyph may be longer than a char because we are dealing with utf data) |
| // Last two variables are the initial pen position |
| void renderUTF(const char *text, uint32_t len, uint32_t start, int numGlyphs, int x, int y); |
| |
| // Currently files do not get serialized, |
| // but we need to inherit from ObjectBase for ref tracking |
| virtual void serialize(OStream *stream) const { |
| } |
| virtual RsA3DClassID getClassId() const { |
| return RS_A3D_CLASS_ID_UNKNOWN; |
| } |
| |
| static Font * create(Context *rsc, const char *name, uint32_t fontSize, uint32_t dpi); |
| |
| protected: |
| |
| friend class FontState; |
| |
| void invalidateTextureCache(); |
| struct CachedGlyphInfo |
| { |
| // Has the cache been invalidated? |
| bool mIsValid; |
| // Location of the cached glyph in the bitmap |
| // in case we need to resize the texture |
| uint32_t mBitmapMinX; |
| uint32_t mBitmapMinY; |
| uint32_t mBitmapWidth; |
| uint32_t mBitmapHeight; |
| // Also cache texture coords for the quad |
| float mBitmapMinU; |
| float mBitmapMinV; |
| float mBitmapMaxU; |
| float mBitmapMaxV; |
| // Minimize how much we call freetype |
| FT_UInt mGlyphIndex; |
| FT_Vector mAdvance; |
| // Values below contain a glyph's origin in the bitmap |
| FT_Int mBitmapLeft; |
| FT_Int mBitmapTop; |
| }; |
| |
| String8 mFontName; |
| uint32_t mFontSize; |
| uint32_t mDpi; |
| |
| Font(Context *rsc); |
| bool init(const char *name, uint32_t fontSize, uint32_t dpi); |
| |
| FT_Face mFace; |
| bool mInitialized; |
| bool mHasKerning; |
| |
| DefaultKeyedVector<uint32_t, CachedGlyphInfo* > mCachedGlyphs; |
| CachedGlyphInfo* getCachedUTFChar(int32_t utfChar); |
| |
| CachedGlyphInfo *cacheGlyph(uint32_t glyph); |
| void updateGlyphCache(CachedGlyphInfo *glyph); |
| void drawCachedGlyph(CachedGlyphInfo *glyph, int x, int y); |
| }; |
| |
| class FontState |
| { |
| public: |
| FontState(); |
| ~FontState(); |
| |
| void init(Context *rsc); |
| void deinit(Context *rsc); |
| |
| ObjectBaseRef<Font> mDefault; |
| ObjectBaseRef<Font> mLast; |
| |
| void renderText(const char *text, uint32_t len, uint32_t startIndex, int numGlyphs, int x, int y); |
| void renderText(const char *text, int x, int y); |
| void renderText(Allocation *alloc, int x, int y); |
| void renderText(Allocation *alloc, uint32_t start, int len, int x, int y); |
| |
| void setFontColor(float r, float g, float b, float a); |
| void getFontColor(float *r, float *g, float *b, float *a) const; |
| |
| protected: |
| |
| friend class Font; |
| |
| struct CacheTextureLine |
| { |
| uint32_t mMaxHeight; |
| uint32_t mMaxWidth; |
| uint32_t mCurrentRow; |
| uint32_t mCurrentCol; |
| bool mDirty; |
| |
| CacheTextureLine(uint32_t maxHeight, uint32_t maxWidth, uint32_t currentRow, uint32_t currentCol) : |
| mMaxHeight(maxHeight), mMaxWidth(maxWidth), mCurrentRow(currentRow), mCurrentCol(currentCol), |
| mDirty(false) { |
| } |
| |
| bool fitBitmap(FT_Bitmap *bitmap, uint32_t *retOriginX, uint32_t *retOriginY) { |
| if((uint32_t)bitmap->rows > mMaxHeight) { |
| return false; |
| } |
| |
| if(mCurrentCol + (uint32_t)bitmap->width < mMaxWidth) { |
| *retOriginX = mCurrentCol; |
| *retOriginY = mCurrentRow; |
| mCurrentCol += bitmap->width; |
| mDirty = true; |
| return true; |
| } |
| |
| return false; |
| } |
| }; |
| |
| Vector<CacheTextureLine*> mCacheLines; |
| uint32_t getRemainingCacheCapacity(); |
| |
| void precacheLatin(Font *font); |
| String8 mLatinPrecache; |
| |
| Context *mRSC; |
| |
| float mFontColor[4]; |
| bool mFontColorDirty; |
| |
| // Free type library, we only need one copy |
| FT_Library mLibrary; |
| FT_Library getLib(); |
| Vector<Font*> mActiveFonts; |
| |
| // Render state for the font |
| ObjectBaseRef<ProgramFragment> mFontShaderF; |
| ObjectBaseRef<Sampler> mFontSampler; |
| ObjectBaseRef<ProgramStore> mFontProgramStore; |
| void initRenderState(); |
| |
| // Texture to cache glyph bitmaps |
| ObjectBaseRef<Allocation> mTextTexture; |
| void initTextTexture(); |
| |
| bool cacheBitmap(FT_Bitmap *bitmap, uint32_t *retOriginX, uint32_t *retOriginY); |
| const Type* getCacheTextureType() { |
| return mTextTexture->getType(); |
| } |
| |
| void flushAllAndInvalidate(); |
| |
| // Pointer to vertex data to speed up frame to frame work |
| float *mTextMeshPtr; |
| uint32_t mCurrentQuadIndex; |
| uint32_t mMaxNumberOfQuads; |
| |
| void initVertexArrayBuffers(); |
| ObjectBaseRef<Allocation> mIndexBuffer; |
| ObjectBaseRef<Allocation> mVertexArray; |
| |
| |
| bool mInitialized; |
| |
| void checkInit(); |
| |
| void issueDrawCommand(); |
| |
| void appendMeshQuad(float x1, float y1, float z1, |
| float u1, float v1, |
| float x2, float y2, float z2, |
| float u2, float v2, |
| float x3, float y3, float z3, |
| float u3, float v3, |
| float x4, float y4, float z4, |
| float u4, float v4); |
| |
| }; |
| |
| |
| } |
| } |
| |
| #endif |