diff options
author | 2015-04-01 12:40:54 -0700 | |
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committer | 2015-04-01 12:40:54 -0700 | |
commit | 1d89e8d1a46dfd8dd0a417edec5409721a1600a6 (patch) | |
tree | 83bee3cdf580448862c2e970df7f4a104dc14956 /src/gpu/GrBitmapTextContext.h | |
parent | 48c3534541696e770fe6c0a22bd5a5071934a472 (diff) |
move Atlas Text Context to its own file
BUG=skia:
Review URL: https://codereview.chromium.org/1045723010
Diffstat (limited to 'src/gpu/GrBitmapTextContext.h')
-rw-r--r-- | src/gpu/GrBitmapTextContext.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/src/gpu/GrBitmapTextContext.h b/src/gpu/GrBitmapTextContext.h index 1f8a82f35a..f843fc76c2 100644 --- a/src/gpu/GrBitmapTextContext.h +++ b/src/gpu/GrBitmapTextContext.h @@ -11,174 +11,6 @@ #include "GrTextContext.h" #include "GrGeometryProcessor.h" -#include "GrMemoryPool.h" -#include "SkDescriptor.h" -#include "SkTHash.h" - -class GrBatchTextStrike; -class GrPipelineBuilder; - -/* - * This class implements GrTextContext using standard bitmap fonts, and can also process textblobs. - * TODO replace GrBitmapTextContext - */ -class GrBitmapTextContextB : public GrTextContext { -public: - static GrBitmapTextContextB* Create(GrContext*, SkGpuDevice*, const SkDeviceProperties&); - - virtual ~GrBitmapTextContextB(); - -private: - GrBitmapTextContextB(GrContext*, SkGpuDevice*, const SkDeviceProperties&); - - bool canDraw(const GrRenderTarget*, const GrClip&, const GrPaint&, - const SkPaint&, const SkMatrix& viewMatrix) override; - - void onDrawText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&, - const SkMatrix& viewMatrix, const char text[], size_t byteLength, - SkScalar x, SkScalar y, const SkIRect& regionClipBounds) override; - void onDrawPosText(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&, - const SkMatrix& viewMatrix, - const char text[], size_t byteLength, - const SkScalar pos[], int scalarsPerPosition, - const SkPoint& offset, const SkIRect& regionClipBounds) override; - void drawTextBlob(GrRenderTarget*, const GrClip&, const SkPaint&, - const SkMatrix& viewMatrix, const SkTextBlob*, SkScalar x, SkScalar y, - SkDrawFilter*, const SkIRect& clipBounds) override; - - void init(GrRenderTarget*, const GrClip&, const GrPaint&, const SkPaint&, - const SkIRect& regionClipBounds); - - /* - * A BitmapTextBlob contains a fully processed SkTextBlob, suitable for nearly immediate drawing - * on the GPU. These are initially created with valid positions and colors, but invalid - * texture coordinates. The BitmapTextBlob itself has a few Blob-wide properties, and also - * consists of a number of runs. Runs inside a blob are flushed individually so they can be - * reordered. - * - * The only thing(aside from a memcopy) required to flush a BitmapTextBlob is to ensure that - * the GrAtlas will not evict anything the Blob needs. - * TODO this is currently a bug - */ - struct BitmapTextBlob : public SkRefCnt { - // Each Run inside of the blob can have its texture coordinates regenerated if required. - // To determine if regeneration is necessary, fAtlasGeneration is used. If there have been - // any evictions inside of the atlas, then we will simply regenerate Runs. We could track - // this at a more fine grained level, but its not clear if this is worth it, as evictions - // should be fairly rare. - // One additional point, each run can contain glyphs with any of the three mask formats. - // We call these SubRuns. Because a subrun must be a contiguous range, we have to create - // a new subrun each time the mask format changes in a run. In theory, a run can have as - // many SubRuns as it has glyphs, ie if a run alternates between color emoji and A8. In - // practice, the vast majority of runs have only a single subrun. - - struct Run { - Run() : fColor(GrColor_ILLEGAL), fInitialized(false) { - fVertexBounds.setLargestInverted(); - // We insert the first subrun to gurantee a run always has atleast one subrun. - // We do this to simplify things when we 'hand off' data from one subrun to the - // next - fSubRunInfo.push_back(); - } - struct SubRunInfo { - SubRunInfo() - : fAtlasGeneration(GrBatchAtlas::kInvalidAtlasGeneration) - , fGlyphStartIndex(0) - , fGlyphEndIndex(0) - , fVertexStartIndex(0) - , fVertexEndIndex(0) {} - GrMaskFormat fMaskFormat; - uint64_t fAtlasGeneration; - uint32_t fGlyphStartIndex; - uint32_t fGlyphEndIndex; - size_t fVertexStartIndex; - size_t fVertexEndIndex; - }; - SkSTArray<1, SubRunInfo, true> fSubRunInfo; - SkAutoDescriptor fDescriptor; - SkAutoTUnref<SkTypeface> fTypeface; - SkRect fVertexBounds; - GrColor fColor; - bool fInitialized; - }; - - struct BigGlyph { - BigGlyph(const SkPath& path, int vx, int vy) : fPath(path), fVx(vx), fVy(vy) {} - SkPath fPath; - int fVx; - int fVy; - }; - - SkTArray<BigGlyph> fBigGlyphs; - SkMatrix fViewMatrix; - SkScalar fX; - SkScalar fY; - SkPaint::Style fStyle; - uint32_t fRunCount; - - // all glyph / vertex offsets are into these pools. - unsigned char* fVertices; - GrGlyph::PackedID* fGlyphIDs; - Run* fRuns; - - static uint32_t Hash(const uint32_t& key) { - return SkChecksum::Mix(key); - } - - void operator delete(void* p) { sk_free(p); } - void* operator new(size_t) { - SkFAIL("All blobs are created by placement new."); - return sk_malloc_throw(0); - } - - void* operator new(size_t, void* p) { return p; } - void operator delete(void* target, void* placement) { - ::operator delete(target, placement); - } - }; - - typedef BitmapTextBlob::Run Run; - typedef Run::SubRunInfo PerSubRunInfo; - - BitmapTextBlob* CreateBlob(int glyphCount, int runCount); - - void appendGlyph(BitmapTextBlob*, int runIndex, GrGlyph::PackedID, int left, int top, - GrFontScaler*, const SkIRect& clipRect); - void flush(GrDrawTarget*, BitmapTextBlob*, GrRenderTarget*, const GrPaint&, const GrClip&, - const SkMatrix& viewMatrix, int paintAlpha); - - void internalDrawText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&, - const SkMatrix& viewMatrix, const char text[], size_t byteLength, - SkScalar x, SkScalar y, const SkIRect& clipRect); - void internalDrawPosText(BitmapTextBlob*, int runIndex, SkGlyphCache*, const SkPaint&, - const SkMatrix& viewMatrix, - const char text[], size_t byteLength, - const SkScalar pos[], int scalarsPerPosition, - const SkPoint& offset, const SkIRect& clipRect); - - // sets up the descriptor on the blob and returns a detached cache. Client must attach - inline SkGlyphCache* setupCache(Run*, const SkPaint&, const SkMatrix& viewMatrix); - static inline bool MustRegenerateBlob(const BitmapTextBlob&, const SkPaint&, - const SkMatrix& viewMatrix, SkScalar x, SkScalar y); - void regenerateTextBlob(BitmapTextBlob* bmp, const SkPaint& skPaint, const SkMatrix& viewMatrix, - const SkTextBlob* blob, SkScalar x, SkScalar y, - SkDrawFilter* drawFilter, const SkIRect& clipRect); - - // TODO this currently only uses the public interface of SkTextBlob, however, I may need to add - // functionality to it while looping over the runs so I'm putting this here for the time being. - // If this lands in Chrome without changes, move it to SkTextBlob. - static inline void BlobGlyphCount(int* glyphCount, int* runCount, const SkTextBlob*); - - GrBatchTextStrike* fCurrStrike; - - // TODO use real cache - static void ClearCacheEntry(uint32_t key, BitmapTextBlob**); - SkTHashMap<uint32_t, BitmapTextBlob*, BitmapTextBlob::Hash> fCache; - - friend class BitmapTextBatch; - - typedef GrTextContext INHERITED; -}; class GrTextStrike; |