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comparison: gfx/skia/trunk/src/gpu/GrTextContext.cpp
gfx/skia/trunk/src/gpu/GrTextContext.cpp
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| -1:000000000000 | 0:0504219009a1 |
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| 1 /* | |
| 2 * Copyright 2010 Google Inc. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license that can be | |
| 5 * found in the LICENSE file. | |
| 6 */ | |
| 7 | |
| 8 #include "GrTextContext.h" | |
| 9 #include "GrContext.h" | |
| 10 | |
| 11 #include "SkAutoKern.h" | |
| 12 #include "SkGlyphCache.h" | |
| 13 #include "SkGr.h" | |
| 14 | |
| 15 GrTextContext::GrTextContext(GrContext* context, const SkDeviceProperties& properties) : | |
| 16 fContext(context), fDeviceProperties(properties), fDrawTarget(NULL) { | |
| 17 } | |
| 18 | |
| 19 void GrTextContext::init(const GrPaint& grPaint, const SkPaint& skPaint) { | |
| 20 const GrClipData* clipData = fContext->getClip(); | |
| 21 | |
| 22 SkRect devConservativeBound; | |
| 23 clipData->fClipStack->getConservativeBounds( | |
| 24 -clipData->fOrigin.fX, | |
| 25 -clipData->fOrigin.fY, | |
| 26 fContext->getRenderTarget()->width(), | |
| 27 fContext->getRenderTarget()->height(), | |
| 28 &devConservativeBound); | |
| 29 | |
| 30 devConservativeBound.roundOut(&fClipRect); | |
| 31 | |
| 32 fDrawTarget = fContext->getTextTarget(); | |
| 33 | |
| 34 fPaint = grPaint; | |
| 35 fSkPaint = skPaint; | |
| 36 } | |
| 37 | |
| 38 //*** change to output positions? | |
| 39 void GrTextContext::MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc, | |
| 40 const char text[], size_t byteLength, SkVector* stopVector) { | |
| 41 SkFixed x = 0, y = 0; | |
| 42 const char* stop = text + byteLength; | |
| 43 | |
| 44 SkAutoKern autokern; | |
| 45 | |
| 46 while (text < stop) { | |
| 47 // don't need x, y here, since all subpixel variants will have the | |
| 48 // same advance | |
| 49 const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); | |
| 50 | |
| 51 x += autokern.adjust(glyph) + glyph.fAdvanceX; | |
| 52 y += glyph.fAdvanceY; | |
| 53 } | |
| 54 stopVector->set(SkFixedToScalar(x), SkFixedToScalar(y)); | |
| 55 | |
| 56 SkASSERT(text == stop); | |
| 57 } | |
| 58 | |
| 59 static void GlyphCacheAuxProc(void* data) { | |
| 60 GrFontScaler* scaler = (GrFontScaler*)data; | |
| 61 SkSafeUnref(scaler); | |
| 62 } | |
| 63 | |
| 64 GrFontScaler* GrTextContext::GetGrFontScaler(SkGlyphCache* cache) { | |
| 65 void* auxData; | |
| 66 GrFontScaler* scaler = NULL; | |
| 67 | |
| 68 if (cache->getAuxProcData(GlyphCacheAuxProc, &auxData)) { | |
| 69 scaler = (GrFontScaler*)auxData; | |
| 70 } | |
| 71 if (NULL == scaler) { | |
| 72 scaler = SkNEW_ARGS(SkGrFontScaler, (cache)); | |
| 73 cache->setAuxProc(GlyphCacheAuxProc, scaler); | |
| 74 } | |
| 75 | |
| 76 return scaler; | |
| 77 } |
