| /* |
| * 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/SkImageInfo.h" |
| #include "include/core/SkPaint.h" |
| #include "include/core/SkPoint.h" |
| #include "include/core/SkRect.h" |
| #include "include/core/SkRefCnt.h" |
| #include "include/core/SkScalar.h" |
| #include "include/core/SkShader.h" |
| #include "include/core/SkSize.h" |
| #include "include/core/SkString.h" |
| #include "include/core/SkSurface.h" |
| #include "include/core/SkTileMode.h" |
| #include "include/core/SkTypeface.h" |
| #include "include/core/SkTypes.h" |
| #include "include/effects/SkGradientShader.h" |
| #include "tools/ToolUtils.h" |
| |
| namespace skiagm { |
| |
| constexpr int kColWidth = 180; |
| constexpr int kNumCols = 4; |
| constexpr int kWidth = kColWidth * kNumCols; |
| constexpr int kHeight = 750; |
| |
| static sk_sp<SkShader> make_shader(const SkRect& bounds) { |
| const SkPoint pts[] = { |
| { bounds.left(), bounds.top() }, |
| { bounds.right(), bounds.bottom() }, |
| }; |
| const SkColor colors[] = { |
| SK_ColorRED, SK_ColorGREEN, |
| }; |
| return SkGradientShader::MakeLinear(pts, colors, nullptr, std::size(colors), |
| SkTileMode::kRepeat); |
| } |
| |
| class LcdBlendGM : public skiagm::GM { |
| public: |
| LcdBlendGM() { |
| const int kPointSize = 25; |
| fTextHeight = SkIntToScalar(kPointSize); |
| } |
| |
| protected: |
| SkString onShortName() override { |
| return SkString("lcdblendmodes"); |
| } |
| |
| void onOnceBeforeDraw() override { |
| fCheckerboard = ToolUtils::create_checkerboard_shader(SK_ColorBLACK, SK_ColorWHITE, 4); |
| } |
| |
| SkISize onISize() override { return SkISize::Make(kWidth, kHeight); } |
| |
| void onDraw(SkCanvas* canvas) override { |
| SkPaint p; |
| p.setAntiAlias(false); |
| p.setStyle(SkPaint::kFill_Style); |
| p.setShader(fCheckerboard); |
| SkRect r = SkRect::MakeWH(SkIntToScalar(kWidth), SkIntToScalar(kHeight)); |
| canvas->drawRect(r, p); |
| |
| SkImageInfo info = SkImageInfo::MakeN32Premul(kWidth, kHeight); |
| SkSurfaceProps props = SkSurfaceProps(0, kRGB_H_SkPixelGeometry); |
| auto surface(ToolUtils::makeSurface(canvas, info, &props)); |
| |
| SkCanvas* surfCanvas = surface->getCanvas(); |
| this->drawColumn(surfCanvas, SK_ColorBLACK, SK_ColorWHITE, false); |
| surfCanvas->translate(SkIntToScalar(kColWidth), 0); |
| this->drawColumn(surfCanvas, SK_ColorWHITE, SK_ColorBLACK, false); |
| surfCanvas->translate(SkIntToScalar(kColWidth), 0); |
| this->drawColumn(surfCanvas, SK_ColorGREEN, SK_ColorMAGENTA, false); |
| surfCanvas->translate(SkIntToScalar(kColWidth), 0); |
| this->drawColumn(surfCanvas, SK_ColorCYAN, SK_ColorMAGENTA, true); |
| |
| SkPaint surfPaint; |
| surfPaint.setBlendMode(SkBlendMode::kSrcOver); |
| surface->draw(canvas, 0, 0, SkSamplingOptions(), &surfPaint); |
| } |
| |
| void drawColumn(SkCanvas* canvas, SkColor backgroundColor, SkColor textColor, bool useGrad) { |
| const SkBlendMode gModes[] = { |
| SkBlendMode::kClear, |
| SkBlendMode::kSrc, |
| SkBlendMode::kDst, |
| SkBlendMode::kSrcOver, |
| SkBlendMode::kDstOver, |
| SkBlendMode::kSrcIn, |
| SkBlendMode::kDstIn, |
| SkBlendMode::kSrcOut, |
| SkBlendMode::kDstOut, |
| SkBlendMode::kSrcATop, |
| SkBlendMode::kDstATop, |
| SkBlendMode::kXor, |
| SkBlendMode::kPlus, |
| SkBlendMode::kModulate, |
| SkBlendMode::kScreen, |
| SkBlendMode::kOverlay, |
| SkBlendMode::kDarken, |
| SkBlendMode::kLighten, |
| SkBlendMode::kColorDodge, |
| SkBlendMode::kColorBurn, |
| SkBlendMode::kHardLight, |
| SkBlendMode::kSoftLight, |
| SkBlendMode::kDifference, |
| SkBlendMode::kExclusion, |
| SkBlendMode::kMultiply, |
| SkBlendMode::kHue, |
| SkBlendMode::kSaturation, |
| SkBlendMode::kColor, |
| SkBlendMode::kLuminosity, |
| }; |
| // Draw background rect |
| SkPaint backgroundPaint; |
| backgroundPaint.setColor(backgroundColor); |
| canvas->drawRect(SkRect::MakeIWH(kColWidth, kHeight), backgroundPaint); |
| SkScalar y = fTextHeight; |
| for (size_t m = 0; m < std::size(gModes); m++) { |
| SkPaint paint; |
| paint.setColor(textColor); |
| paint.setBlendMode(gModes[m]); |
| SkFont font(ToolUtils::create_portable_typeface(), fTextHeight); |
| font.setSubpixel(true); |
| font.setEdging(SkFont::Edging::kSubpixelAntiAlias); |
| if (useGrad) { |
| SkRect r; |
| r.setXYWH(0, y - fTextHeight, SkIntToScalar(kColWidth), fTextHeight); |
| paint.setShader(make_shader(r)); |
| } |
| SkString string(SkBlendMode_Name(gModes[m])); |
| canvas->drawString(string, 0, y, font, paint); |
| y+=fTextHeight; |
| } |
| } |
| |
| private: |
| SkScalar fTextHeight; |
| sk_sp<SkShader> fCheckerboard; |
| using INHERITED = skiagm::GM; |
| }; |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM( return new LcdBlendGM; ) |
| } // namespace skiagm |