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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
// This test only works with the GPU backend.
#include "gm.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "SkColorPriv.h"
#include "effects/GrPorterDuffXferProcessor.h"
#include "effects/GrSimpleTextureEffect.h"
namespace skiagm {
static const int S = 200;
class TexDataGM : public GM {
public:
TexDataGM() {
this->setBGColor(0xff000000);
}
protected:
virtual SkString onShortName() SK_OVERRIDE {
return SkString("texdata");
}
virtual SkISize onISize() SK_OVERRIDE {
return SkISize::Make(2*S, 2*S);
}
virtual uint32_t onGetFlags() const SK_OVERRIDE { return kGPUOnly_Flag; }
virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
GrRenderTarget* target = canvas->internal_private_accessTopLayerRenderTarget();
GrContext* ctx = canvas->getGrContext();
if (ctx && target) {
SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S));
static const int stride = 2 * S;
static const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
static const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
static const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
for (int i = 0; i < 2; ++i) {
int offset = 0;
// fill upper-left
for (int y = 0; y < S; ++y) {
for (int x = 0; x < S; ++x) {
gTextureData[offset + y * stride + x] = gray;
}
}
// fill upper-right
offset = S;
for (int y = 0; y < S; ++y) {
for (int x = 0; x < S; ++x) {
gTextureData[offset + y * stride + x] = white;
}
}
// fill lower left
offset = S * stride;
for (int y = 0; y < S; ++y) {
for (int x = 0; x < S; ++x) {
gTextureData[offset + y * stride + x] = black;
}
}
// fill lower right
offset = S * stride + S;
for (int y = 0; y < S; ++y) {
for (int x = 0; x < S; ++x) {
gTextureData[offset + y * stride + x] = gray;
}
}
GrSurfaceDesc desc;
// use RT flag bit because in GL it makes the texture be bottom-up
desc.fFlags = i ? kRenderTarget_GrSurfaceFlag :
kNone_GrSurfaceFlags;
desc.fConfig = kSkia8888_GrPixelConfig;
desc.fWidth = 2 * S;
desc.fHeight = 2 * S;
GrTexture* texture =
ctx->createUncachedTexture(desc, gTextureData.get(), 0);
if (!texture) {
return;
}
SkAutoTUnref<GrTexture> au(texture);
GrContext::AutoClip acs(ctx, SkRect::MakeWH(2*S, 2*S));
ctx->setRenderTarget(target);
GrPaint paint;
paint.setPorterDuffXPFactory(SkXfermode::kSrcOver_Mode);
SkMatrix vm;
if (i) {
vm.setRotate(90 * SK_Scalar1,
S * SK_Scalar1,
S * SK_Scalar1);
} else {
vm.reset();
}
SkMatrix tm;
tm = vm;
tm.postIDiv(2*S, 2*S);
paint.addColorTextureProcessor(texture, tm);
ctx->drawRect(paint, vm, SkRect::MakeWH(2*S, 2*S));
// now update the lower right of the texture in first pass
// or upper right in second pass
offset = 0;
for (int y = 0; y < S; ++y) {
for (int x = 0; x < S; ++x) {
gTextureData[offset + y * stride + x] =
((x + y) % 2) ? (i ? green : red) : blue;
}
}
texture->writePixels(S, (i ? 0 : S), S, S,
texture->config(), gTextureData.get(),
4 * stride);
ctx->drawRect(paint, vm, SkRect::MakeWH(2*S, 2*S));
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new TexDataGM; }
static GMRegistry reg(MyFactory);
}
#endif
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