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author | joshualitt <joshualitt@chromium.org> | 2015-04-14 12:17:27 -0700 |
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committer | Commit bot <commit-bot@chromium.org> | 2015-04-14 12:17:27 -0700 |
commit | 9e36c1a9306f052331550dab4728b9875127bfb5 (patch) | |
tree | dc081124538053c3d28376cb767527326da74d25 /gm/textblobcolortrans.cpp | |
parent | 8fe8fffdfa7464c6f7da773b8660a2043f4998e0 (diff) |
Start canonicalizing color for all A8 textblobs
BUG=skia:
Review URL: https://codereview.chromium.org/1076593002
Diffstat (limited to 'gm/textblobcolortrans.cpp')
-rw-r--r-- | gm/textblobcolortrans.cpp | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/gm/textblobcolortrans.cpp b/gm/textblobcolortrans.cpp new file mode 100644 index 0000000000..cb4686e6e7 --- /dev/null +++ b/gm/textblobcolortrans.cpp @@ -0,0 +1,100 @@ +/* + * Copyright 2015 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "gm.h" + +#include "Resources.h" +#include "SkCanvas.h" +#include "SkGradientShader.h" +#include "SkStream.h" +#include "SkTextBlob.h" +#include "SkTypeface.h" + +namespace skiagm { +class TextBlobColorTrans : public GM { +public: + // This gm tests that textblobs can be translated and have their colors regenerated + // correctly. With smaller atlas sizes, it can also trigger regeneration of texture coords on + // the GPU backend + TextBlobColorTrans() { } + +protected: + void onOnceBeforeDraw() override { + SkTextBlobBuilder builder; + + // make textblob + // Large text is used to trigger atlas eviction + SkPaint paint; + paint.setTextSize(256); + const char* text = "AB"; + sk_tool_utils::set_portable_typeface(&paint); + + SkRect bounds; + paint.measureText(text, strlen(text), &bounds); + + SkScalar yOffset = bounds.height(); + sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30); + + // A8 + paint.setTextSize(28); + text = "The quick brown fox jumps over the lazy dog."; + paint.setSubpixelText(false); + paint.setLCDRenderText(false); + paint.measureText(text, strlen(text), &bounds); + sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 8); + + // build + fBlob.reset(builder.build()); + } + + SkString onShortName() override { + return SkString("textblobcolortrans"); + } + + SkISize onISize() override { + return SkISize::Make(kWidth, kHeight); + } + + void onDraw(SkCanvas* canvas) override { + + canvas->drawColor(SK_ColorGRAY); + + SkPaint paint; + canvas->translate(10, 40); + + SkRect bounds = fBlob->bounds(); + + // Colors were chosen to map to pairs of canonical colors. The GPU Backend will cache A8 + // Texture Blobs based on the canonical color they map to. Canonical colors are used to + // create masks. For A8 there are 8 of them. + SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE}; + + size_t count = SK_ARRAY_COUNT(colors); + size_t colorIndex = 0; + for (int y = 0; y + SkScalarFloorToInt(bounds.height()) < kHeight; + y += SkScalarFloorToInt(bounds.height())) { + paint.setColor(colors[colorIndex++ % count]); + canvas->save(); + canvas->translate(0, SkIntToScalar(y)); + canvas->drawTextBlob(fBlob, 0, 0, paint); + canvas->restore(); + } + } + +private: + SkAutoTUnref<const SkTextBlob> fBlob; + + static const int kWidth = 675; + static const int kHeight = 1600; + + typedef GM INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +DEF_GM( return SkNEW(TextBlobColorTrans); ) +} |