143 lines
4.6 KiB
C++
143 lines
4.6 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm/gm.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkImageInfo.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkPath.h"
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#include "include/core/SkPoint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkShader.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkSurface.h"
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#include "include/core/SkTileMode.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "include/effects/SkGradientShader.h"
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#include "tools/ToolUtils.h"
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#define W SkIntToScalar(80)
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#define H SkIntToScalar(60)
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typedef void (*PaintProc)(SkPaint*);
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static void identity_paintproc(SkPaint* paint) {
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paint->setShader(nullptr);
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}
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static void gradient_paintproc(SkPaint* paint) {
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const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE };
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const SkPoint pts[] = { { 0, 0 }, { W, H } };
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paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
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SkTileMode::kClamp));
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}
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typedef void (*Proc)(SkCanvas*, const SkPaint&, const SkFont&);
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static void draw_hair(SkCanvas* canvas, const SkPaint& paint, const SkFont&) {
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SkPaint p(paint);
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p.setStrokeWidth(0);
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canvas->drawLine(0, 0, W, H, p);
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}
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static void draw_thick(SkCanvas* canvas, const SkPaint& paint, const SkFont&) {
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SkPaint p(paint);
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p.setStrokeWidth(H/5);
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canvas->drawLine(0, 0, W, H, p);
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}
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static void draw_rect(SkCanvas* canvas, const SkPaint& paint, const SkFont&) {
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canvas->drawRect(SkRect::MakeWH(W, H), paint);
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}
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static void draw_oval(SkCanvas* canvas, const SkPaint& paint, const SkFont&) {
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canvas->drawOval(SkRect::MakeWH(W, H), paint);
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}
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static void draw_text(SkCanvas* canvas, const SkPaint& paint, const SkFont& font) {
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canvas->drawString("Hamburge", 0, H*2/3, font, paint);
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}
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class SrcModeGM : public skiagm::GM {
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SkPath fPath;
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void onOnceBeforeDraw() override { this->setBGColor(SK_ColorBLACK); }
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SkString onShortName() override { return SkString("srcmode"); }
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SkISize onISize() override { return {640, 760}; }
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void drawContent(SkCanvas* canvas) {
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canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
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SkPaint paint;
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SkFont font(ToolUtils::create_portable_typeface(), H / 4);
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paint.setColor(0x80F60000);
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const Proc procs[] = {
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draw_hair, draw_thick, draw_rect, draw_oval, draw_text
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};
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const SkBlendMode modes[] = {
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SkBlendMode::kSrcOver, SkBlendMode::kSrc, SkBlendMode::kClear
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};
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const PaintProc paintProcs[] = {
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identity_paintproc, gradient_paintproc
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};
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for (int aa = 0; aa <= 1; ++aa) {
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paint.setAntiAlias(SkToBool(aa));
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font.setEdging(SkToBool(aa) ? SkFont::Edging::kAntiAlias : SkFont::Edging::kAlias);
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canvas->save();
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for (size_t i = 0; i < SK_ARRAY_COUNT(paintProcs); ++i) {
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paintProcs[i](&paint);
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for (size_t x = 0; x < SK_ARRAY_COUNT(modes); ++x) {
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paint.setBlendMode(modes[x]);
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canvas->save();
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for (size_t y = 0; y < SK_ARRAY_COUNT(procs); ++y) {
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procs[y](canvas, paint, font);
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canvas->translate(0, H * 5 / 4);
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}
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canvas->restore();
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canvas->translate(W * 5 / 4, 0);
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}
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}
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canvas->restore();
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canvas->translate(0, (H * 5 / 4) * SK_ARRAY_COUNT(procs));
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}
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}
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static sk_sp<SkSurface> compat_surface(SkCanvas* canvas, const SkISize& size) {
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SkImageInfo info = SkImageInfo::MakeN32Premul(size);
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sk_sp<SkSurface> surface = canvas->makeSurface(info);
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if (nullptr == surface) {
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// picture canvas will return null, so fall-back to raster
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surface = SkSurface::MakeRaster(info);
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}
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return surface;
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}
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void onDraw(SkCanvas* canvas) override {
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auto surf(compat_surface(canvas, this->getISize()));
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surf->getCanvas()->drawColor(SK_ColorWHITE);
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this->drawContent(surf->getCanvas());
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surf->draw(canvas, 0, 0);
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}
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new SrcModeGM;)
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