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/*
* 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.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkSurface.h"
#if SK_SUPPORT_GPU
#include "SkGpuDevice.h"
#endif
#define W SkIntToScalar(80)
#define H SkIntToScalar(60)
typedef void (*PaintProc)(SkPaint*);
static void identity_paintproc(SkPaint* paint) {
paint->setShader(NULL);
}
static void gradient_paintproc(SkPaint* paint) {
const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE };
const SkPoint pts[] = { { 0, 0 }, { W, H } };
SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL,
SK_ARRAY_COUNT(colors),
SkShader::kClamp_TileMode);
paint->setShader(s)->unref();
}
typedef void (*Proc)(SkCanvas*, const SkPaint&);
static void draw_hair(SkCanvas* canvas, const SkPaint& paint) {
SkPaint p(paint);
p.setStrokeWidth(0);
canvas->drawLine(0, 0, W, H, p);
}
static void draw_thick(SkCanvas* canvas, const SkPaint& paint) {
SkPaint p(paint);
p.setStrokeWidth(H/5);
canvas->drawLine(0, 0, W, H, p);
}
static void draw_rect(SkCanvas* canvas, const SkPaint& paint) {
canvas->drawRect(SkRect::MakeWH(W, H), paint);
}
static void draw_oval(SkCanvas* canvas, const SkPaint& paint) {
canvas->drawOval(SkRect::MakeWH(W, H), paint);
}
static void draw_text(SkCanvas* canvas, const SkPaint& paint) {
SkPaint p(paint);
p.setTextSize(H/4);
canvas->drawText("Hamburge", 8, 0, H*2/3, p);
}
class SrcModeGM : public skiagm::GM {
SkPath fPath;
public:
SrcModeGM() {
this->setBGColor(SK_ColorBLACK);
}
protected:
virtual SkString onShortName() {
return SkString("srcmode");
}
virtual SkISize onISize() {
return SkISize::Make(640, 760);
}
void drawContent(SkCanvas* canvas) {
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
SkPaint paint;
paint.setColor(0x80FF0000);
const Proc procs[] = {
draw_hair, draw_thick, draw_rect, draw_oval, draw_text
};
const SkXfermode::Mode modes[] = {
SkXfermode::kSrcOver_Mode, SkXfermode::kSrc_Mode, SkXfermode::kClear_Mode
};
const PaintProc paintProcs[] = {
identity_paintproc, gradient_paintproc
};
for (int aa = 0; aa <= 1; ++aa) {
paint.setAntiAlias(SkToBool(aa));
canvas->save();
for (size_t i = 0; i < SK_ARRAY_COUNT(paintProcs); ++i) {
paintProcs[i](&paint);
for (size_t x = 0; x < SK_ARRAY_COUNT(modes); ++x) {
paint.setXfermodeMode(modes[x]);
canvas->save();
for (size_t y = 0; y < SK_ARRAY_COUNT(procs); ++y) {
procs[y](canvas, paint);
canvas->translate(0, H * 5 / 4);
}
canvas->restore();
canvas->translate(W * 5 / 4, 0);
}
}
canvas->restore();
canvas->translate(0, (H * 5 / 4) * SK_ARRAY_COUNT(procs));
}
}
static SkSurface* compat_surface(SkCanvas* canvas, const SkISize& size,
bool skipGPU) {
SkImage::Info info = {
size.width(),
size.height(),
SkImage::kPMColor_ColorType,
kPremul_SkAlphaType
};
#if SK_SUPPORT_GPU
SkBaseDevice* dev = canvas->getDevice();
if (!skipGPU && dev->accessRenderTarget()) {
SkGpuDevice* gd = (SkGpuDevice*)dev;
GrContext* ctx = gd->context();
return SkSurface::NewRenderTarget(ctx, info, 0);
}
#endif
return SkSurface::NewRaster(info);
}
virtual void onDraw(SkCanvas* canvas) {
SkAutoTUnref<SkSurface> surf(compat_surface(canvas, this->getISize(),
this->isCanvasDeferred()));
surf->getCanvas()->drawColor(SK_ColorWHITE);
this->drawContent(surf->getCanvas());
surf->draw(canvas, 0, 0, NULL);
}
private:
typedef skiagm::GM INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
DEF_GM(return new SrcModeGM;)
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