зеркало из https://github.com/mozilla/moz-skia.git
150 строки
5.0 KiB
C++
150 строки
5.0 KiB
C++
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/*
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* Copyright 2011 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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// This test only works with the GPU backend.
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#include "gm.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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#include "effects/GrSingleTextureEffect.h"
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#include "SkColorPriv.h"
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#include "SkDevice.h"
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namespace skiagm {
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extern GrContext* GetGr();
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static const int S = 200;
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class TexDataGM : public GM {
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public:
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TexDataGM() {
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this->setBGColor(0xff000000);
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}
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protected:
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virtual SkString onShortName() {
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return SkString("texdata");
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}
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virtual SkISize onISize() {
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return make_isize(2*S, 2*S);
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}
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virtual void onDraw(SkCanvas* canvas) {
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SkDevice* device = canvas->getDevice();
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GrRenderTarget* target = (GrRenderTarget*) device->accessRenderTarget();
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GrContext* ctx = GetGr();
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if (ctx && target) {
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SkPMColor gTextureData[(2 * S) * (2 * S)];
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static const int stride = 2 * S;
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static const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
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static const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
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static const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
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static const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
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static const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
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static const SkPMColor black = SkPackARGB32(0x00, 0x00, 0x00, 0x00);
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for (int i = 0; i < 2; ++i) {
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int offset = 0;
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// fill upper-left
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for (int y = 0; y < S; ++y) {
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for (int x = 0; x < S; ++x) {
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gTextureData[offset + y * stride + x] = gray;
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}
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}
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// fill upper-right
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offset = S;
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for (int y = 0; y < S; ++y) {
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for (int x = 0; x < S; ++x) {
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gTextureData[offset + y * stride + x] = white;
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}
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}
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// fill lower left
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offset = S * stride;
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for (int y = 0; y < S; ++y) {
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for (int x = 0; x < S; ++x) {
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gTextureData[offset + y * stride + x] = black;
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}
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}
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// fill lower right
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offset = S * stride + S;
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for (int y = 0; y < S; ++y) {
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for (int x = 0; x < S; ++x) {
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gTextureData[offset + y * stride + x] = gray;
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}
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}
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GrTextureDesc desc;
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// use RT flag bit because in GL it makes the texture be bottom-up
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desc.fFlags = i ? kRenderTarget_GrTextureFlagBit :
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kNone_GrTextureFlags;
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desc.fConfig = kSkia8888_PM_GrPixelConfig;
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desc.fWidth = 2 * S;
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desc.fHeight = 2 * S;
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GrTexture* texture =
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ctx->createUncachedTexture(desc, gTextureData, 0);
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if (!texture) {
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return;
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}
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GrAutoUnref au(texture);
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GrContext::AutoClip acs(ctx, GrRect::MakeWH(2*S, 2*S));
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ctx->setRenderTarget(target);
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GrPaint paint;
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paint.setBlendFunc(kOne_GrBlendCoeff, kISA_GrBlendCoeff);
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GrMatrix vm;
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if (i) {
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vm.setRotate(90 * SK_Scalar1,
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S * SK_Scalar1,
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S * SK_Scalar1);
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} else {
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vm.reset();
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}
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ctx->setMatrix(vm);
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GrMatrix tm;
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tm = vm;
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tm.postIDiv(2*S, 2*S);
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paint.colorSampler(0)->setCustomStage(SkNEW_ARGS(GrSingleTextureEffect,
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(texture)), tm)->unref();
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ctx->drawRect(paint, GrRect::MakeWH(2*S, 2*S));
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// now update the lower right of the texture in first pass
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// or upper right in second pass
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offset = 0;
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for (int y = 0; y < S; ++y) {
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for (int x = 0; x < S; ++x) {
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gTextureData[offset + y * stride + x] =
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((x + y) % 2) ? (i ? green : red) : blue;
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}
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}
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texture->writePixels(S, (i ? 0 : S), S, S,
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texture->config(), gTextureData,
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4 * stride);
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ctx->drawRect(paint, GrRect::MakeWH(2*S, 2*S));
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}
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}
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}
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private:
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static GM* MyFactory(void*) { return new TexDataGM; }
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static GMRegistry reg(MyFactory);
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}
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#endif
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