SkUnichar SkScalerContext::glyphIDToChar(uint16_t glyphID) {
SkScalerContext* ctx = this;
unsigned rangeEnd = 0;
do {
unsigned rangeStart = rangeEnd;
rangeEnd += ctx->getGlyphCount();
if (rangeStart <= glyphID && glyphID < rangeEnd) {
return ctx->generateGlyphToChar(glyphID - rangeStart);
}
ctx = ctx->getNextContext();
} while (NULL != ctx);
return 0;
}
SkScalerContext* SkScalerContext::getGlyphContext(const SkGlyph& glyph) {
unsigned glyphID = glyph.getGlyphID();
SkScalerContext* ctx = this;
for (;;) {
unsigned count = ctx->getGlyphCount();
if (glyphID < count) {
break;
}
glyphID -= count;
ctx = ctx->getNextContext();
if (NULL == ctx) {
SkDebugf("--- no context for glyph %x\n", glyph.getGlyphID());
// just return the original context (this)
return this;
}
}
return ctx;
}
unsigned SkRandomScalerContext::generateGlyphCount() {
return fProxy->getGlyphCount();
}