void Font::render(const SkPaint* paint, const char *text, uint32_t start, uint32_t len,
int numGlyphs, const SkPath* path, float hOffset, float vOffset) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
text += start;
int glyphsCount = 0;
SkFixed prevRsbDelta = 0;
float penX = 0.0f;
SkPoint position;
SkVector tangent;
SkPathMeasure measure(*path, false);
float pathLength = SkScalarToFloat(measure.getLength());
if (paint->getTextAlign() != SkPaint::kLeft_Align) {
float textWidth = SkScalarToFloat(paint->measureText(text, len));
float pathOffset = pathLength;
if (paint->getTextAlign() == SkPaint::kCenter_Align) {
textWidth *= 0.5f;
pathOffset *= 0.5f;
}
penX += pathOffset - textWidth;
}
while (glyphsCount < numGlyphs && penX < pathLength) {
glyph_t glyph = GET_GLYPH(text);
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
if (cachedGlyph->mIsValid && cachedGlyph->mCacheTexture) {
drawCachedGlyph(cachedGlyph, penX, hOffset, vOffset, measure, &position, &tangent);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
}
void Font::render(const SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* positions) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
static RenderGlyph gRenderGlyph[] = {
&android::uirenderer::Font::drawCachedGlyph,
&android::uirenderer::Font::drawCachedGlyphTransformed,
&android::uirenderer::Font::drawCachedGlyphBitmap,
&android::uirenderer::Font::drawCachedGlyphBitmap,
&android::uirenderer::Font::measureCachedGlyph,
&android::uirenderer::Font::measureCachedGlyph
};
RenderGlyph render = gRenderGlyph[(mode << 1) + !mIdentityTransform];
text += start;
int glyphsCount = 0;
const SkPaint::Align align = paint->getTextAlign();
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
// If it's still not valid, we couldn't cache it, so we shouldn't
// draw garbage; also skip empty glyphs (spaces)
if (cachedGlyph->mIsValid && cachedGlyph->mCacheTexture) {
int penX = x + (int) roundf(positions[(glyphsCount << 1)]);
int penY = y + (int) roundf(positions[(glyphsCount << 1) + 1]);
(*this.*render)(cachedGlyph, penX, penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
glyphsCount++;
}
}
void Font::precache(const SkPaint* paint, const char* text, int numGlyphs) {
ATRACE_NAME("Precache Glyphs");
if (numGlyphs == 0 || text == NULL) {
return;
}
int glyphsCount = 0;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph, true);
glyphsCount++;
}
}
void Font::render(SkPaint* paint, const char* text, uint32_t start, uint32_t len,
int numGlyphs, int x, int y, RenderMode mode, uint8_t *bitmap,
uint32_t bitmapW, uint32_t bitmapH, Rect* bounds, const float* positions) {
if (numGlyphs == 0 || text == NULL || len == 0) {
return;
}
static RenderGlyph gRenderGlyph[] = {
&android::uirenderer::Font::drawCachedGlyph,
&android::uirenderer::Font::drawCachedGlyphBitmap,
&android::uirenderer::Font::measureCachedGlyph
};
RenderGlyph render = gRenderGlyph[mode];
text += start;
int glyphsCount = 0;
if (CC_LIKELY(positions == NULL)) {
SkFixed prevRsbDelta = 0;
float penX = x + 0.5f;
int penY = y;
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
penX += SkFixedToFloat(AUTO_KERN(prevRsbDelta, cachedGlyph->mLsbDelta));
prevRsbDelta = cachedGlyph->mRsbDelta;
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
(*this.*render)(cachedGlyph, (int) floorf(penX), penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
penX += SkFixedToFloat(cachedGlyph->mAdvanceX);
glyphsCount++;
}
} else {
const SkPaint::Align align = paint->getTextAlign();
// This is for renderPosText()
while (glyphsCount < numGlyphs) {
glyph_t glyph = GET_GLYPH(text);
// Reached the end of the string
if (IS_END_OF_STRING(glyph)) {
break;
}
CachedGlyphInfo* cachedGlyph = getCachedGlyph(paint, glyph);
// If it's still not valid, we couldn't cache it, so we shouldn't draw garbage
if (cachedGlyph->mIsValid) {
int penX = x + positions[(glyphsCount << 1)];
int penY = y + positions[(glyphsCount << 1) + 1];
switch (align) {
case SkPaint::kRight_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY);
break;
case SkPaint::kCenter_Align:
penX -= SkFixedToFloat(cachedGlyph->mAdvanceX >> 1);
penY -= SkFixedToFloat(cachedGlyph->mAdvanceY >> 1);
default:
break;
}
(*this.*render)(cachedGlyph, penX, penY,
bitmap, bitmapW, bitmapH, bounds, positions);
}
glyphsCount++;
}
}