dbfd7ab108
'static const' means, there must be at most one of these, and initialize it at compile time if possible or runtime if necessary. This leads to unexpected code execution, and TSAN* will complain about races on the guard variables. Generally 'constexpr' or 'const' are better choices. Neither can cause races: they're either intialized at compile time (constexpr) or intialized each time independently (const). This CL prefers constexpr where possible, and uses const where not. It even prefers constexpr over const where they don't make a difference... I want to have lots of examples of constexpr for people to see and mimic. The scoped-to-class static has nothing to do with any of this, and is not changed. * Not yet on the bots, which use an older TSAN. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2300623005 Review-Url: https://codereview.chromium.org/2300623005
123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
/*
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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 "GrDrawContext.h"
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#include "GrFixedClip.h"
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#include "SkColorPriv.h"
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#include "effects/GrPorterDuffXferProcessor.h"
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#include "effects/GrSimpleTextureEffect.h"
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constexpr int S = 200;
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DEF_SIMPLE_GM_BG(texdata, canvas, 2 * S, 2 * S, SK_ColorBLACK) {
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GrDrawContext* drawContext = canvas->internal_private_accessTopLayerDrawContext();
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if (!drawContext) {
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skiagm::GM::DrawGpuOnlyMessage(canvas);
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return;
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}
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GrContext* context = canvas->getGrContext();
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if (!context) {
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return;
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}
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SkAutoTArray<SkPMColor> gTextureData((2 * S) * (2 * S));
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constexpr int stride = 2 * S;
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const SkPMColor gray = SkPackARGB32(0x40, 0x40, 0x40, 0x40);
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const SkPMColor white = SkPackARGB32(0xff, 0xff, 0xff, 0xff);
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const SkPMColor red = SkPackARGB32(0x80, 0x80, 0x00, 0x00);
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const SkPMColor blue = SkPackARGB32(0x80, 0x00, 0x00, 0x80);
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const SkPMColor green = SkPackARGB32(0x80, 0x00, 0x80, 0x00);
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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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GrSurfaceDesc desc;
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desc.fOrigin = i ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
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desc.fConfig = kSkia8888_GrPixelConfig;
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desc.fWidth = 2 * S;
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desc.fHeight = 2 * S;
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GrTexture* texture = context->textureProvider()->createTexture(
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desc, SkBudgeted::kNo, gTextureData.get(), 0);
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if (!texture) {
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return;
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}
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SkAutoTUnref<GrTexture> au(texture);
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// setup new clip
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GrFixedClip clip(SkIRect::MakeWH(2*S, 2*S));
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GrPaint paint;
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paint.setPorterDuffXPFactory(SkXfermode::kSrcOver_Mode);
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SkMatrix 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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SkMatrix tm;
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tm = vm;
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tm.postIDiv(2*S, 2*S);
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paint.addColorTextureProcessor(texture, nullptr, tm);
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drawContext->drawRect(clip, paint, vm, SkRect::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.get(),
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4 * stride);
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drawContext->drawRect(clip, paint, vm, SkRect::MakeWH(2*S, 2*S));
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}
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}
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#endif
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