ShadowTexture* TextDropShadowCache::get(SkPaint* paint, const char* text, uint32_t len,
int numGlyphs, uint32_t radius, const float* positions) {
ShadowText entry(paint, radius, len, text, positions);
ShadowTexture* texture = mCache.get(entry);
if (!texture) {
SkPaint paintCopy(*paint);
paintCopy.setTextAlign(SkPaint::kLeft_Align);
FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(&paintCopy, text, 0,
len, numGlyphs, radius, positions);
texture = new ShadowTexture;
texture->left = shadow.penX;
texture->top = shadow.penY;
texture->width = shadow.width;
texture->height = shadow.height;
texture->generation = 0;
texture->blend = true;
const uint32_t size = shadow.width * shadow.height;
texture->bitmapSize = size;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
}
glGenTextures(1, &texture->id);
glBindTexture(GL_TEXTURE_2D, texture->id);
// Textures are Alpha8
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
texture->setFilter(GL_LINEAR);
texture->setWrap(GL_CLAMP_TO_EDGE);
if (size < mMaxSize) {
if (mDebugEnabled) {
ALOGD("Shadow texture created, size = %d", texture->bitmapSize);
}
entry.copyTextLocally();
mSize += size;
mCache.put(entry, texture);
} else {
texture->cleanup = true;
}
// Cleanup shadow
delete[] shadow.image;
}
return texture;
}
void Canvas::drawTextDecorations(float x, float y, float length, const SkPaint& paint) {
uint32_t flags;
SkDrawFilter* drawFilter = getDrawFilter();
if (drawFilter) {
SkPaint paintCopy(paint);
drawFilter->filter(&paintCopy, SkDrawFilter::kText_Type);
flags = paintCopy.getFlags();
} else {
flags = paint.getFlags();
}
if (flags & (SkPaint::kUnderlineText_Flag | SkPaint::kStrikeThruText_Flag)) {
// Same values used by Skia
const float kStdStrikeThru_Offset = (-6.0f / 21.0f);
const float kStdUnderline_Offset = (1.0f / 9.0f);
const float kStdUnderline_Thickness = (1.0f / 18.0f);
SkScalar left = x;
SkScalar right = x + length;
float textSize = paint.getTextSize();
float strokeWidth = fmax(textSize * kStdUnderline_Thickness, 1.0f);
if (flags & SkPaint::kUnderlineText_Flag) {
SkScalar top = y + textSize * kStdUnderline_Offset - 0.5f * strokeWidth;
SkScalar bottom = y + textSize * kStdUnderline_Offset + 0.5f * strokeWidth;
drawRect(left, top, right, bottom, paint);
}
if (flags & SkPaint::kStrikeThruText_Flag) {
SkScalar top = y + textSize * kStdStrikeThru_Offset - 0.5f * strokeWidth;
SkScalar bottom = y + textSize * kStdStrikeThru_Offset + 0.5f * strokeWidth;
drawRect(left, top, right, bottom, paint);
}
}
}
ShadowTexture* TextDropShadowCache::get(const SkPaint* paint, const glyph_t* glyphs, int numGlyphs,
float radius, const float* positions) {
ShadowText entry(paint, radius, numGlyphs, glyphs, positions);
ShadowTexture* texture = mCache.get(entry);
if (!texture) {
SkPaint paintCopy(*paint);
paintCopy.setTextAlign(SkPaint::kLeft_Align);
FontRenderer::DropShadow shadow =
mRenderer->renderDropShadow(&paintCopy, glyphs, numGlyphs, radius, positions);
if (!shadow.image) {
return nullptr;
}
Caches& caches = Caches::getInstance();
texture = new ShadowTexture(caches);
texture->left = shadow.penX;
texture->top = shadow.penY;
texture->generation = 0;
texture->blend = true;
const uint32_t size = shadow.width * shadow.height;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
LOG_ALWAYS_FATAL_IF(!mCache.removeOldest(),
"Failed to remove oldest from cache. mSize = %" PRIu32
", mCache.size() = %zu",
mSize, mCache.size());
}
}
// Textures are Alpha8
texture->upload(GL_ALPHA, shadow.width, shadow.height, GL_ALPHA, GL_UNSIGNED_BYTE,
shadow.image);
texture->setFilter(GL_LINEAR);
texture->setWrap(GL_CLAMP_TO_EDGE);
if (size < mMaxSize) {
if (mDebugEnabled) {
ALOGD("Shadow texture created, size = %d", texture->bitmapSize);
}
entry.copyTextLocally();
mSize += texture->objectSize();
mCache.put(entry, texture);
} else {
texture->cleanup = true;
}
// Cleanup shadow
free(shadow.image);
}
return texture;
}
void SkBaseDevice::drawImageLattice(const SkImage* image,
const SkCanvas::Lattice& lattice, const SkRect& dst,
const SkPaint& paint) {
SkLatticeIter iter(lattice, dst);
SkRect srcR, dstR;
SkColor c;
bool isFixedColor = false;
const SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType, kUnpremul_SkAlphaType);
while (iter.next(&srcR, &dstR, &isFixedColor, &c)) {
if (isFixedColor || (srcR.width() <= 1.0f && srcR.height() <= 1.0f &&
image->readPixels(info, &c, 4, srcR.fLeft, srcR.fTop))) {
// Fast draw with drawRect, if this is a patch containing a single color
// or if this is a patch containing a single pixel.
if (0 != c || !paint.isSrcOver()) {
SkPaint paintCopy(paint);
int alpha = SkAlphaMul(SkColorGetA(c), SkAlpha255To256(paint.getAlpha()));
paintCopy.setColor(SkColorSetA(c, alpha));
this->drawRect(dstR, paintCopy);
}
} else {
this->drawImageRect(image, &srcR, dstR, paint, SkCanvas::kStrict_SrcRectConstraint);
}
}
}
void Canvas::drawTextOnPath(const uint16_t* text, int count, int bidiFlags, const SkPath& path,
float hOffset, float vOffset, const Paint& paint, Typeface* typeface) {
Paint paintCopy(paint);
Layout layout;
MinikinUtils::doLayout(&layout, &paintCopy, bidiFlags, typeface, text, 0, count, count);
hOffset += MinikinUtils::hOffsetForTextAlign(&paintCopy, layout, path);
// Set align to left for drawing, as we don't want individual
// glyphs centered or right-aligned; the offset above takes
// care of all alignment.
paintCopy.setTextAlign(Paint::kLeft_Align);
DrawTextOnPathFunctor f(layout, this, hOffset, vOffset, paintCopy, path);
MinikinUtils::forFontRun(layout, &paintCopy, f);
}