| /* |
| * 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/gm.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFont.h" |
| #include "include/core/SkFontTypes.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkTextBlob.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/core/SkTypes.h" |
| #include "tools/ToolUtils.h" |
| |
| #include <string.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 |
| SkFont font(ToolUtils::create_portable_typeface(), 256); |
| font.setEdging(SkFont::Edging::kAlias); |
| const char* text = "AB"; |
| |
| SkRect bounds; |
| font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds); |
| |
| SkScalar yOffset = bounds.height(); |
| ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 30); |
| |
| // A8 |
| font.setSize(28); |
| text = "The quick brown fox jumps over the lazy dog."; |
| font.measureText(text, strlen(text), SkTextEncoding::kUTF8, &bounds); |
| ToolUtils::add_to_text_blob(&builder, text, font, 0, yOffset - 8); |
| |
| // build |
| fBlob = builder.make(); |
| } |
| |
| 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 = std::size(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: |
| sk_sp<SkTextBlob> fBlob; |
| |
| inline static constexpr int kWidth = 675; |
| inline static constexpr int kHeight = 1600; |
| |
| using INHERITED = GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new TextBlobColorTrans;) |
| } // namespace skiagm |