151 lines
4.3 KiB
C++
151 lines
4.3 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.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkSurface.h"
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#if SK_SUPPORT_GPU
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#include "SkGpuDevice.h"
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#endif
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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(NULL);
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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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SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL,
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SK_ARRAY_COUNT(colors),
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SkShader::kClamp_TileMode);
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paint->setShader(s)->unref();
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}
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typedef void (*Proc)(SkCanvas*, const SkPaint&);
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static void draw_hair(SkCanvas* canvas, const SkPaint& paint) {
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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) {
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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) {
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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) {
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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) {
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SkPaint p(paint);
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p.setTextSize(H/4);
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canvas->drawText("Hamburge", 8, 0, H*2/3, p);
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}
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class SrcModeGM : public skiagm::GM {
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SkPath fPath;
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public:
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SrcModeGM() {
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this->setBGColor(SK_ColorBLACK);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("srcmode");
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}
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virtual SkISize onISize() {
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return SkISize::Make(640, 760);
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}
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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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sk_tool_utils::set_portable_typeface_always(&paint);
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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 SkXfermode::Mode modes[] = {
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SkXfermode::kSrcOver_Mode, SkXfermode::kSrc_Mode, SkXfermode::kClear_Mode
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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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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.setXfermodeMode(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);
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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 SkSurface* compat_surface(SkCanvas* canvas, const SkISize& size, bool skipGPU) {
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SkImageInfo info = SkImageInfo::MakeN32Premul(size);
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bool callNewSurface = true;
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#if SK_SUPPORT_GPU
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if (canvas->getGrContext() && skipGPU) {
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callNewSurface = false;
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}
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#endif
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SkSurface* surface = callNewSurface ? canvas->newSurface(info) : NULL;
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if (NULL == surface) {
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// picture canvas will return null, so fall-back to raster
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surface = SkSurface::NewRaster(info);
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}
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return surface;
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkAutoTUnref<SkSurface> surf(compat_surface(canvas, this->getISize(),
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this->isCanvasDeferred()));
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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, NULL);
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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///////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new SrcModeGM;)
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