diff options
Diffstat (limited to 'src/gl/SkGLTextCache.cpp')
| -rw-r--r-- | src/gl/SkGLTextCache.cpp | 191 |
1 files changed, 0 insertions, 191 deletions
diff --git a/src/gl/SkGLTextCache.cpp b/src/gl/SkGLTextCache.cpp deleted file mode 100644 index 2619dc8..0000000 --- a/src/gl/SkGLTextCache.cpp +++ /dev/null @@ -1,191 +0,0 @@ -#include "SkGLTextCache.h" -#include "SkScalerContext.h" -#include "SkTSearch.h" - -const GLenum gTextTextureFormat = GL_ALPHA; -const GLenum gTextTextureType = GL_UNSIGNED_BYTE; - -SkGLTextCache::Strike::Strike(Strike* next, int width, int height) { - fStrikeWidth = SkNextPow2(SkMax32(kMinStrikeWidth, width)); - fStrikeHeight = SkNextPow2(height); - fGlyphCount = 0; - fNextFreeOffsetX = 0; - fNext = next; - - fStrikeWidthShift = SkNextLog2(fStrikeWidth); - fStrikeHeightShift = SkNextLog2(fStrikeHeight); - - if (next) { - SkASSERT(next->fStrikeHeight == fStrikeHeight); - } - - // create an empty texture to receive glyphs - fTexName = 0; - glGenTextures(1, &fTexName); - glBindTexture(GL_TEXTURE_2D, fTexName); - glTexImage2D(GL_TEXTURE_2D, 0, gTextTextureFormat, - fStrikeWidth, fStrikeHeight, 0, - gTextTextureFormat, gTextTextureType, NULL); - - SK_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - SK_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - SK_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); - SK_glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); -} - -SkGLTextCache::Strike::~Strike() { - if (fTexName != 0) { - glDeleteTextures(1, &fTexName); - } -} - -SkGLTextCache::Strike* -SkGLTextCache::Strike::findGlyph(const SkGlyph& glyph, int* offset) { - Strike* strike = this; - SkDEBUGCODE(const int height = SkNextPow2(glyph.fHeight);) - - do { - SkASSERT(height == strike->fStrikeHeight); - - int index = SkTSearch(strike->fGlyphIDArray, strike->fGlyphCount, - glyph.fID, sizeof(strike->fGlyphIDArray[0])); - if (index >= 0) { - if (offset) { - *offset = strike->fGlyphOffsetX[index]; - } - return strike; - } - strike = strike->fNext; - } while (NULL != strike); - return NULL; -} - -static void make_a_whole(void* buffer, int index, int count, size_t elemSize) { - SkASSERT(index >= 0 && index <= count); - size_t offset = index * elemSize; - memmove((char*)buffer + offset + elemSize, - (const char*)buffer + offset, - (count - index) * elemSize); -} - -SkGLTextCache::Strike* -SkGLTextCache::Strike::addGlyphAndBind(const SkGlyph& glyph, - const uint8_t image[], int* offset) { -#ifdef SK_DEBUG - SkASSERT(this->findGlyph(glyph, NULL) == NULL); - const int height = SkNextPow2(glyph.fHeight); - SkASSERT(height <= fStrikeHeight && height > (fStrikeHeight >> 1)); -#endif - - int rowBytes = glyph.rowBytes(); - SkASSERT(rowBytes >= glyph.fWidth); - - Strike* strike; - if (fGlyphCount == kMaxGlyphCount || - fNextFreeOffsetX + rowBytes >= fStrikeWidth) { - // this will bind the next texture for us -// SkDebugf("--- extend strike %p\n", this); - strike = SkNEW_ARGS(Strike, (this, rowBytes, glyph.fHeight)); - } else { - glBindTexture(GL_TEXTURE_2D, fTexName); - strike = this; - } - - uint32_t* idArray = strike->fGlyphIDArray; - uint16_t* offsetArray = strike->fGlyphOffsetX; - const int glyphCount = strike->fGlyphCount; - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glTexSubImage2D(GL_TEXTURE_2D, 0, strike->fNextFreeOffsetX, 0, rowBytes, - glyph.fHeight, gTextTextureFormat, gTextTextureType, - image); - - // need to insert the offset - int index = SkTSearch(idArray, glyphCount, glyph.fID, sizeof(idArray[0])); - SkASSERT(index < 0); - index = ~index; // this is where we should insert it - make_a_whole(idArray, index, glyphCount, sizeof(idArray)); - make_a_whole(offsetArray, index, glyphCount, sizeof(offsetArray[0])); - idArray[index] = glyph.fID; - offsetArray[index] = strike->fNextFreeOffsetX; - if (offset) { - *offset = strike->fNextFreeOffsetX; - } - -#if 0 - SkDebugf("--- strike %p glyph %x [%d %d] offset %d count %d\n", - strike, glyph.fID, glyph.fWidth, glyph.fHeight, - strike->fNextFreeOffsetX, glyphCount + 1); -#endif - - // now update our header - strike->fGlyphCount = glyphCount + 1; - strike->fNextFreeOffsetX += glyph.fWidth; - return strike; -} - -/////////////////////////////////////////////////////////////////////////////// - -SkGLTextCache::SkGLTextCache() { - sk_bzero(fStrikeList, sizeof(fStrikeList)); -} - -SkGLTextCache::~SkGLTextCache() { - this->deleteAllStrikes(true); -} - -void SkGLTextCache::deleteAllStrikes(bool texturesAreValid) { - for (size_t i = 0; i < SK_ARRAY_COUNT(fStrikeList); i++) { - Strike* strike = fStrikeList[i]; - while (strike != NULL) { - Strike* next = strike->fNext; - if (!texturesAreValid) { - strike->abandonTexture(); - } - SkDELETE(strike); - strike = next; - } - } - sk_bzero(fStrikeList, sizeof(fStrikeList)); -} - -SkGLTextCache::Strike* SkGLTextCache::findGlyph(const SkGlyph& glyph, - int* offset) { - SkASSERT(glyph.fWidth != 0); - SkASSERT(glyph.fHeight != 0); - - size_t index = SkNextLog2(glyph.fHeight); - if (index >= SK_ARRAY_COUNT(fStrikeList)) { - // too big for us to cache; - return NULL; - } - - Strike* strike = fStrikeList[index]; - if (strike) { - strike = strike->findGlyph(glyph, offset); - } - return strike; -} - -SkGLTextCache::Strike* SkGLTextCache::addGlyphAndBind(const SkGlyph& glyph, - const uint8_t image[], int* offset) { - SkASSERT(image != NULL); - SkASSERT(glyph.fWidth != 0); - SkASSERT(glyph.fHeight != 0); - - size_t index = SkNextLog2(glyph.fHeight); - if (index >= SK_ARRAY_COUNT(fStrikeList)) { - // too big for us to cache; - return NULL; - } - - Strike* strike = fStrikeList[index]; - if (NULL == strike) { - strike = SkNEW_ARGS(Strike, (NULL, glyph.rowBytes(), glyph.fHeight)); -// SkDebugf("--- create strike [%d] %p cache %p\n", index, strike, this); - } - strike = strike->addGlyphAndBind(glyph, image, offset); - fStrikeList[index] = strike; - return strike; -} - |