| /* |
| * 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/SkBlendMode.h" |
| #include "include/core/SkCanvas.h" |
| #include "include/core/SkColor.h" |
| #include "include/core/SkFont.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" |
| |
| namespace skiagm { |
| |
| constexpr int kWidth = 750; |
| constexpr int kHeight = 750; |
| |
| class LcdOverlapGM : public skiagm::GM { |
| public: |
| LcdOverlapGM() { |
| const int kPointSize = 25; |
| fTextHeight = SkIntToScalar(kPointSize); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("lcdoverlap"); |
| } |
| |
| void onOnceBeforeDraw() override { |
| // build text blob |
| SkTextBlobBuilder builder; |
| |
| SkFont font(ToolUtils::create_portable_typeface(), 32); |
| const char* text = "able was I ere I saw elba"; |
| font.setSubpixel(true); |
| font.setEdging(SkFont::Edging::kSubpixelAntiAlias); |
| ToolUtils::add_to_text_blob(&builder, text, font, 0, 0); |
| fBlob = builder.make(); |
| } |
| |
| SkISize onISize() override { return SkISize::Make(kWidth, kHeight); } |
| |
| void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkBlendMode mode, |
| SkBlendMode mode2) { |
| const SkColor colors[] { |
| SK_ColorRED, |
| SK_ColorGREEN, |
| SK_ColorBLUE, |
| SK_ColorYELLOW, |
| SK_ColorCYAN, |
| SK_ColorMAGENTA, |
| }; |
| |
| for (size_t i = 0; i < std::size(colors); i++) { |
| canvas->save(); |
| canvas->translate(x, y); |
| canvas->rotate(360.0f / std::size(colors) * i); |
| canvas->translate(-fBlob->bounds().width() / 2.0f - fBlob->bounds().left() + 0.5f, 0); |
| |
| SkPaint textPaint; |
| textPaint.setColor(colors[i]); |
| textPaint.setBlendMode(i % 2 == 0 ? mode : mode2); |
| canvas->drawTextBlob(fBlob, 0, 0, textPaint); |
| canvas->restore(); |
| } |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkScalar offsetX = kWidth / 4.0f; |
| SkScalar offsetY = kHeight / 4.0f; |
| drawTestCase(canvas, offsetX, offsetY, SkBlendMode::kSrc, SkBlendMode::kSrc); |
| drawTestCase(canvas, 3 * offsetX, offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrcOver); |
| drawTestCase(canvas, offsetX, 3 * offsetY, SkBlendMode::kHardLight, |
| SkBlendMode::kLuminosity); |
| drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrc); |
| } |
| |
| private: |
| SkScalar fTextHeight; |
| sk_sp<SkTextBlob> fBlob; |
| using INHERITED = skiagm::GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new LcdOverlapGM; ) |
| } // namespace skiagm |