PassTextBlobPtr Font::buildTextBlob(const GlyphBuffer& glyphBuffer, float initialAdvance, const FloatRect& bounds) const
{
SkTextBlobBuilder builder;
SkScalar advance = SkFloatToScalar(initialAdvance);
bool success = glyphBuffer.hasOffsets() ?
buildTextBlobInternal<true>(glyphBuffer, advance, builder) :
buildTextBlobInternal<false>(glyphBuffer, advance, builder);
return success ? adoptRef(builder.build()) : nullptr;
}
void WriteLine(const SkShaper& shaper, const char *text, size_t textBytes) {
if (!pageCanvas || current_y > config->page_height.value) {
if (pageCanvas) {
document->endPage();
}
pageCanvas = document->beginPage(config->page_width.value,
config->page_height.value);
pageCanvas->drawPaint(white_paint);
current_x = config->left_margin.value;
current_y = config->line_spacing_ratio.value * config->font_size.value;
}
SkTextBlobBuilder textBlobBuilder;
shaper.shape(&textBlobBuilder, glyph_paint, text, textBytes, SkPoint{0, 0});
sk_sp<const SkTextBlob> blob(textBlobBuilder.build());
pageCanvas->drawTextBlob(blob.get(), current_x, current_y, glyph_paint);
// Advance to the next line.
current_y += config->line_spacing_ratio.value * config->font_size.value;
}
void onDelayedSetup() override {
fTypeface.reset(sk_tool_utils::create_portable_typeface("serif", SkTypeface::kNormal));
// make textblob
SkPaint paint;
paint.setTypeface(fTypeface);
const char* text = "Hello blob!";
SkTDArray<uint16_t> glyphs;
size_t len = strlen(text);
glyphs.append(paint.textToGlyphs(text, len, nullptr));
paint.textToGlyphs(text, len, glyphs.begin());
SkTextBlobBuilder builder;
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(paint, glyphs.count(), 10, 10,
nullptr);
memcpy(run.glyphs, glyphs.begin(), glyphs.count() * sizeof(uint16_t));
fBlob.reset(builder.build());
}
// This test hammers the GPU textblobcache and font atlas
static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContext* context,
int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
bool stressTest) {
// setup surface
uint32_t flags = 0;
SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
// configure our context for maximum stressing of cache and atlas
if (stressTest) {
GrTest::SetupAlwaysEvictAtlas(context);
context->setTextBlobCacheLimit_ForTesting(0);
}
SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kN32_SkColorType, kPremul_SkAlphaType);
auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 0, &props));
REPORTER_ASSERT(reporter, surface);
if (!surface) {
return;
}
SkCanvas* canvas = surface->getCanvas();
SkAutoTUnref<SkFontMgr> fm(SkFontMgr::RefDefault());
int count = SkMin32(fm->countFamilies(), maxFamilies);
// make a ton of text
SkAutoTArray<uint16_t> text(maxTotalText);
for (int i = 0; i < maxTotalText; i++) {
text[i] = i % maxGlyphID;
}
// generate textblobs
SkTArray<TextBlobWrapper> blobs;
for (int i = 0; i < count; i++) {
SkPaint paint;
paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
paint.setTextSize(48); // draw big glyphs to really stress the atlas
SkString familyName;
fm->getFamilyName(i, &familyName);
SkAutoTUnref<SkFontStyleSet> set(fm->createStyleSet(i));
for (int j = 0; j < set->count(); ++j) {
SkFontStyle fs;
set->getStyle(j, &fs, nullptr);
// We use a typeface which randomy returns unexpected mask formats to fuzz
SkAutoTUnref<SkTypeface> orig(set->createTypeface(j));
if (normal) {
paint.setTypeface(orig);
} else {
SkAutoTUnref<SkTypeface> typeface(new SkRandomTypeface(orig, paint, true));
paint.setTypeface(typeface);
}
SkTextBlobBuilder builder;
for (int aa = 0; aa < 2; aa++) {
for (int subpixel = 0; subpixel < 2; subpixel++) {
for (int lcd = 0; lcd < 2; lcd++) {
paint.setAntiAlias(SkToBool(aa));
paint.setSubpixelText(SkToBool(subpixel));
paint.setLCDRenderText(SkToBool(lcd));
if (!SkToBool(lcd)) {
paint.setTextSize(160);
}
const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(paint,
maxTotalText,
0, 0,
nullptr);
memcpy(run.glyphs, text.get(), maxTotalText * sizeof(uint16_t));
}
}
}
blobs.emplace_back(builder.build());
}
}
// create surface where LCD is impossible
info = SkImageInfo::MakeN32Premul(kWidth, kHeight);
SkSurfaceProps propsNoLCD(0, kUnknown_SkPixelGeometry);
auto surfaceNoLCD(canvas->makeSurface(info, &propsNoLCD));
REPORTER_ASSERT(reporter, surface);
if (!surface) {
return;
}
SkCanvas* canvasNoLCD = surfaceNoLCD->getCanvas();
// test redraw
draw(canvas, 2, blobs);
draw(canvasNoLCD, 2, blobs);
// test draw after free
context->freeGpuResources();
draw(canvas, 1, blobs);
context->freeGpuResources();
draw(canvasNoLCD, 1, blobs);
// test draw after abandon
context->abandonContext();
draw(canvas, 1, blobs);
}
const SkTextBlob* makeBlob(unsigned blobIndex) {
SkTextBlobBuilder builder;
SkPaint font;
font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
font.setAntiAlias(true);
font.setSubpixelText(true);
font.setTypeface(fTypeface);
for (unsigned l = 0; l < SK_ARRAY_COUNT(blobConfigs[blobIndex]); ++l) {
unsigned currentGlyph = 0;
for (unsigned c = 0; c < SK_ARRAY_COUNT(blobConfigs[blobIndex][l]); ++c) {
const BlobCfg* cfg = &blobConfigs[blobIndex][l][c];
unsigned count = cfg->count;
if (count > fGlyphs.count() - currentGlyph) {
count = fGlyphs.count() - currentGlyph;
}
if (0 == count) {
break;
}
font.setTextSize(kFontSize * cfg->scale);
const SkScalar advanceX = font.getTextSize() * 0.85f;
const SkScalar advanceY = font.getTextSize() * 1.5f;
SkPoint offset = SkPoint::Make(currentGlyph * advanceX + c * advanceX,
advanceY * l);
switch (cfg->pos) {
case kDefault_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRun(font, count,
offset.x(),
offset.y());
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
} break;
case kScalar_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPosH(font, count,
offset.y());
SkTDArray<SkScalar> pos;
for (unsigned i = 0; i < count; ++i) {
*pos.append() = offset.x() + i * advanceX;
}
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar));
} break;
case kPoint_Pos: {
const SkTextBlobBuilder::RunBuffer& buf = builder.allocRunPos(font, count);
SkTDArray<SkScalar> pos;
for (unsigned i = 0; i < count; ++i) {
*pos.append() = offset.x() + i * advanceX;
*pos.append() = offset.y() + i * (advanceY / count);
}
memcpy(buf.glyphs, fGlyphs.begin() + currentGlyph, count * sizeof(uint16_t));
memcpy(buf.pos, pos.begin(), count * sizeof(SkScalar) * 2);
} break;
default:
SK_ABORT("unhandled pos value");
}
currentGlyph += count;
}
}
return builder.build();
}
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
// LCD
SkPaint paint;
paint.setTextSize(32);
const char* text = "The quick brown fox jumps over the lazy dog";
paint.setSubpixelText(true);
paint.setLCDRenderText(true);
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
add_to_text_blob(&builder, text, paint, 0, 0);
fBlob.reset(builder.build());
// create a looper which sandwhiches an effect in two normal draws
LooperSettings looperSandwhich[] = {
{ SkXfermode::kSrc_Mode, SK_ColorMAGENTA, SkPaint::kFill_Style, 0, 0, 0, false },
{ SkXfermode::kSrcOver_Mode, 0x88000000, SkPaint::kFill_Style, 0, 10.f, 0, true },
{ SkXfermode::kSrcOver_Mode, 0x50FF00FF, SkPaint::kFill_Style, 0, 20.f, 0, false },
};
LooperSettings compound[] = {
{ SkXfermode::kSrc_Mode, SK_ColorWHITE, SkPaint::kStroke_Style, 1.f * 3/4, 0, 0, false },
{ SkXfermode::kSrc_Mode, SK_ColorRED, SkPaint::kStroke_Style, 4.f, 0, 0, false },
{ SkXfermode::kSrc_Mode, SK_ColorBLUE, SkPaint::kFill_Style, 0, 0, 0, false },
{ SkXfermode::kSrcOver_Mode, 0x88000000, SkPaint::kFill_Style, 0, 10.f, 0, true }
};
LooperSettings xfermode[] = {
{ SkXfermode::kDifference_Mode, SK_ColorWHITE, SkPaint::kFill_Style, 0, 0, 0, false },
{ SkXfermode::kSrcOver_Mode, 0xFF000000, SkPaint::kFill_Style, 0, 1.f, 0, true },
{ SkXfermode::kSrcOver_Mode, 0x50FF00FF, SkPaint::kFill_Style, 0, 2.f, 0, false },
};
// NOTE, this should be ignored by textblobs
LooperSettings skew[] = {
{ SkXfermode::kSrc_Mode, SK_ColorRED, SkPaint::kFill_Style, 0, 0, -1.f, false },
{ SkXfermode::kSrc_Mode, SK_ColorGREEN, SkPaint::kFill_Style, 0, 10.f, -1.f, false },
{ SkXfermode::kSrc_Mode, SK_ColorBLUE, SkPaint::kFill_Style, 0, 20.f, -1.f, false },
};
LooperSettings kitchenSink[] = {
{ SkXfermode::kSrc_Mode, SK_ColorWHITE, SkPaint::kStroke_Style, 1.f * 3/4, 0, 0, false },
{ SkXfermode::kSrc_Mode, SK_ColorBLACK, SkPaint::kFill_Style, 0, 0, 0, false },
{ SkXfermode::kDifference_Mode, SK_ColorWHITE, SkPaint::kFill_Style, 1.f, 10.f, 0, false },
{ SkXfermode::kSrc_Mode, SK_ColorWHITE, SkPaint::kFill_Style, 0, 10.f, 0, true },
{ SkXfermode::kSrcOver_Mode, 0x50FF00FF, SkPaint::kFill_Style, 0, 20.f, 0, false },
};
fLoopers.push_back(setupLooper(SkLayerDrawLooper::kMaskFilter_Bit |
SkLayerDrawLooper::kXfermode_Bit |
SkLayerDrawLooper::kStyle_Bit, &mask_filter,
compound, SK_ARRAY_COUNT(compound)));
fLoopers.push_back(setupLooper(SkLayerDrawLooper::kPathEffect_Bit |
SkLayerDrawLooper::kXfermode_Bit, &path_effect,
looperSandwhich, SK_ARRAY_COUNT(looperSandwhich)));
fLoopers.push_back(setupLooper(SkLayerDrawLooper::kShader_Bit |
SkLayerDrawLooper::kColorFilter_Bit |
SkLayerDrawLooper::kXfermode_Bit, &color_filter,
looperSandwhich, SK_ARRAY_COUNT(looperSandwhich)));
fLoopers.push_back(setupLooper(SkLayerDrawLooper::kShader_Bit |
SkLayerDrawLooper::kColorFilter_Bit |
SkLayerDrawLooper::kXfermode_Bit, &color_filter,
xfermode, SK_ARRAY_COUNT(xfermode)));
fLoopers.push_back(setupLooper(0, nullptr, skew, SK_ARRAY_COUNT(skew)));
fLoopers.push_back(setupLooper(SkLayerDrawLooper::kMaskFilter_Bit |
SkLayerDrawLooper::kShader_Bit |
SkLayerDrawLooper::kColorFilter_Bit |
SkLayerDrawLooper::kPathEffect_Bit |
SkLayerDrawLooper::kStyle_Bit |
SkLayerDrawLooper::kXfermode_Bit, &kitchen_sink,
kitchenSink, SK_ARRAY_COUNT(kitchenSink)));
// Test we respect overrides
fLoopers.push_back(setupLooper(0, &kitchen_sink,
kitchenSink, SK_ARRAY_COUNT(kitchenSink)));
}
