| /* |
| * Copyright 2012 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/SkPath.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" |
| |
| #define W SkIntToScalar(80) |
| #define H SkIntToScalar(60) |
| |
| typedef void (*PaintProc)(SkPaint*); |
| |
| static void identity_paintproc(SkPaint* paint) { |
| paint->setShader(nullptr); |
| } |
| |
| static void gradient_paintproc(SkPaint* paint) { |
| const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE }; |
| const SkPoint pts[] = { { 0, 0 }, { W, H } }; |
| paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, std::size(colors), |
| SkTileMode::kClamp)); |
| } |
| |
| typedef void (*Proc)(SkCanvas*, const SkPaint&, const SkFont&); |
| |
| static void draw_hair(SkCanvas* canvas, const SkPaint& paint, const SkFont&) { |
| SkPaint p(paint); |
| p.setStrokeWidth(0); |
| canvas->drawLine(0, 0, W, H, p); |
| } |
| |
| static void draw_thick(SkCanvas* canvas, const SkPaint& paint, const SkFont&) { |
| SkPaint p(paint); |
| p.setStrokeWidth(H/5); |
| canvas->drawLine(0, 0, W, H, p); |
| } |
| |
| static void draw_rect(SkCanvas* canvas, const SkPaint& paint, const SkFont&) { |
| canvas->drawRect(SkRect::MakeWH(W, H), paint); |
| } |
| |
| static void draw_oval(SkCanvas* canvas, const SkPaint& paint, const SkFont&) { |
| canvas->drawOval(SkRect::MakeWH(W, H), paint); |
| } |
| |
| static void draw_text(SkCanvas* canvas, const SkPaint& paint, const SkFont& font) { |
| canvas->drawString("Hamburge", 0, H*2/3, font, paint); |
| } |
| |
| class SrcModeGM : public skiagm::GM { |
| SkPath fPath; |
| |
| void onOnceBeforeDraw() override { this->setBGColor(SK_ColorBLACK); } |
| |
| SkString onShortName() override { return SkString("srcmode"); } |
| |
| SkISize onISize() override { return {640, 760}; } |
| |
| void drawContent(SkCanvas* canvas) { |
| canvas->translate(SkIntToScalar(20), SkIntToScalar(20)); |
| |
| SkPaint paint; |
| SkFont font(ToolUtils::create_portable_typeface(), H / 4); |
| paint.setColor(0x80F60000); |
| |
| const Proc procs[] = { |
| draw_hair, draw_thick, draw_rect, draw_oval, draw_text |
| }; |
| |
| const SkBlendMode modes[] = { |
| SkBlendMode::kSrcOver, SkBlendMode::kSrc, SkBlendMode::kClear |
| }; |
| |
| const PaintProc paintProcs[] = { |
| identity_paintproc, gradient_paintproc |
| }; |
| |
| for (int aa = 0; aa <= 1; ++aa) { |
| paint.setAntiAlias(SkToBool(aa)); |
| font.setEdging(SkToBool(aa) ? SkFont::Edging::kAntiAlias : SkFont::Edging::kAlias); |
| canvas->save(); |
| for (size_t i = 0; i < std::size(paintProcs); ++i) { |
| paintProcs[i](&paint); |
| for (size_t x = 0; x < std::size(modes); ++x) { |
| paint.setBlendMode(modes[x]); |
| canvas->save(); |
| for (size_t y = 0; y < std::size(procs); ++y) { |
| procs[y](canvas, paint, font); |
| canvas->translate(0, H * 5 / 4); |
| } |
| canvas->restore(); |
| canvas->translate(W * 5 / 4, 0); |
| } |
| } |
| canvas->restore(); |
| canvas->translate(0, (H * 5 / 4) * std::size(procs)); |
| } |
| } |
| |
| static sk_sp<SkSurface> compat_surface(SkCanvas* canvas, const SkISize& size) { |
| SkImageInfo info = SkImageInfo::MakeN32Premul(size); |
| sk_sp<SkSurface> surface = canvas->makeSurface(info); |
| if (nullptr == surface) { |
| // picture canvas will return null, so fall-back to raster |
| surface = SkSurface::MakeRaster(info); |
| } |
| return surface; |
| } |
| |
| void onDraw(SkCanvas* canvas) override { |
| auto surf(compat_surface(canvas, this->getISize())); |
| surf->getCanvas()->drawColor(SK_ColorWHITE); |
| this->drawContent(surf->getCanvas()); |
| surf->draw(canvas, 0, 0); |
| } |
| }; |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| DEF_GM(return new SrcModeGM;) |