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skia2/tests/DMSAATest.cpp
Chris Dalton 09f4864734 Convert GrVertexWriter to a "stream syntax" API 
This helps remove all Ganesh dependencies from GrVertexWriter so it can
be shared with Graphite.

Bug: skia:12466
Change-Id: I1ede1cfc48d501cb1e028bca1e8590e6c92f4e4d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/462316
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-10-21 18:51:00 +00:00

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/*
* Copyright 2021 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "tests/Test.h"
#include "include/core/SkVertices.h"
#include "src/core/SkBlendModePriv.h"
#include "src/core/SkMatrixProvider.h"
#include "src/core/SkSurfacePriv.h"
#include "src/gpu/GrStyle.h"
#include "src/gpu/v1/SurfaceDrawContext_v1.h"
namespace {
static SkSurfaceProps kDMSAAProps(SkSurfaceProps::kDynamicMSAA_Flag, kUnknown_SkPixelGeometry);
static SkSurfaceProps kBasicProps(0, kUnknown_SkPixelGeometry);
constexpr static SkPMColor4f kTransYellow = {.5f,.5f,.0f,.5f};
constexpr static SkPMColor4f kTransCyan = {.0f,.5f,.5f,.5f};
constexpr static int kWidth=10, kHeight=10;
}
static void draw_paint_with_aa(skgpu::v1::SurfaceDrawContext* sdc,
const SkPMColor4f& color,
SkBlendMode blendMode) {
GrPaint paint;
paint.setColor4f(color);
paint.setXPFactory(SkBlendMode_AsXPFactory(blendMode));
sdc->drawRect(nullptr, std::move(paint), GrAA::kYes, SkMatrix::I(),
SkRect::MakeIWH(kWidth, kHeight), nullptr);
}
static void draw_paint_with_dmsaa(skgpu::v1::SurfaceDrawContext* sdc,
const SkPMColor4f& color,
SkBlendMode blendMode) {
// drawVertices should always trigger dmsaa, but draw something non-rectangular just to be 100%
// certain.
static const SkPoint kVertices[3] = {{-.5f,-.5f}, {kWidth * 2.1f, 0}, {0, kHeight * 2.1f}};
SkVertices::Builder builder(SkVertices::kTriangles_VertexMode, 3, 0, 0);
memcpy(builder.positions(), kVertices, sizeof(kVertices));
auto vertices = builder.detach();
GrPaint paint;
paint.setColor4f(color);
paint.setXPFactory(SkBlendMode_AsXPFactory(blendMode));
sdc->drawVertices(nullptr, std::move(paint), SkSimpleMatrixProvider(SkMatrix::I()), vertices);
}
static bool fuzzy_equals(const float a[4], const SkPMColor4f& b) {
constexpr static float kTolerance = 2.5f / 256;
for (int i = 0; i < 4; ++i) {
if (!SkScalarNearlyEqual(a[i], b.vec()[i], kTolerance)) {
return false;
}
}
return true;
}
static void check_sdc_color(skiatest::Reporter* reporter,
skgpu::v1::SurfaceDrawContext* sdc,
GrDirectContext* ctx,
const SkPMColor4f& color) {
auto info = SkImageInfo::Make(kWidth, kHeight, kRGBA_F32_SkColorType, kPremul_SkAlphaType);
GrPixmap pixmap = GrPixmap::Allocate(info);
sdc->readPixels(ctx, pixmap, {0, 0});
auto pix = static_cast<const float*>(pixmap.addr());
for (int y = 0; y < kHeight; ++y) {
for (int x = 0; x < kWidth; ++x) {
if (!fuzzy_equals(pix, color)) {
ERRORF(reporter, "SDC color mismatch.\n"
"Got [%0.3f, %0.3f, %0.3f, %0.3f]\n"
"Expected [%0.3f, %0.3f, %0.3f, %0.3f]",
pix[0], pix[1], pix[2], pix[3], color.fR, color.fG, color.fB, color.fA);
return;
}
pix += 4;
}
}
}
DEF_GPUTEST_FOR_CONTEXTS(DMSAA_preserve_contents,
&sk_gpu_test::GrContextFactory::IsRenderingContext, reporter, ctxInfo,
nullptr) {
auto dContext = ctxInfo.directContext();
auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
SkBackingFit::kApprox, {kWidth, kHeight},
kDMSAAProps);
// Initialize the texture and dmsaa attachment with transparent.
draw_paint_with_dmsaa(sdc.get(), SK_PMColor4fTRANSPARENT, SkBlendMode::kSrc);
check_sdc_color(reporter, sdc.get(), dContext, SK_PMColor4fTRANSPARENT);
// Clear the main texture to yellow.
sdc->clear(kTransYellow);
// Close the opsTask by doing a readback.
check_sdc_color(reporter, sdc.get(), dContext, kTransYellow);
// Now the DMSAA attachment is clear and the texture is yellow. Blend cyan into the DMSAA
// attachment. This will fail if the yellow from the main texture doesn't get copied into the
// DMSAA attachment before the renderPass.
draw_paint_with_dmsaa(sdc.get(), kTransCyan, SkBlendMode::kSrcOver);
SkPMColor4f dstColor = SkBlendMode_Apply(SkBlendMode::kSrcOver, kTransCyan, kTransYellow);
check_sdc_color(reporter, sdc.get(), dContext, dstColor);
}
static void require_dst_reads(GrContextOptions* options) {
options->fSuppressAdvancedBlendEquations = true;
options->fSuppressFramebufferFetch = true;
}
DEF_GPUTEST_FOR_CONTEXTS(DMSAA_dst_read, &sk_gpu_test::GrContextFactory::IsRenderingContext,
reporter, ctxInfo, require_dst_reads) {
auto dContext = ctxInfo.directContext();
auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
SkBackingFit::kApprox, {kWidth, kHeight},
kDMSAAProps);
// Initialize the texture and dmsaa attachment with transparent.
draw_paint_with_dmsaa(sdc.get(), SK_PMColor4fTRANSPARENT, SkBlendMode::kSrc);
check_sdc_color(reporter, sdc.get(), dContext, SK_PMColor4fTRANSPARENT);
sdc->clear(SK_PMColor4fWHITE);
SkPMColor4f dstColor = SK_PMColor4fWHITE;
draw_paint_with_dmsaa(sdc.get(), kTransYellow, SkBlendMode::kDarken);
dstColor = SkBlendMode_Apply(SkBlendMode::kDarken, kTransYellow, dstColor);
draw_paint_with_dmsaa(sdc.get(), kTransCyan, SkBlendMode::kDarken);
dstColor = SkBlendMode_Apply(SkBlendMode::kDarken, kTransCyan, dstColor);
check_sdc_color(reporter, sdc.get(), dContext, dstColor);
}
DEF_GPUTEST_FOR_CONTEXTS(DMSAA_aa_dst_read_after_dmsaa,
&sk_gpu_test::GrContextFactory::IsRenderingContext, reporter, ctxInfo,
require_dst_reads) {
auto dContext = ctxInfo.directContext();
auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
SkBackingFit::kApprox, {kWidth, kHeight},
kDMSAAProps);
// Initialize the texture and dmsaa attachment with transparent.
draw_paint_with_dmsaa(sdc.get(), SK_PMColor4fTRANSPARENT, SkBlendMode::kSrc);
check_sdc_color(reporter, sdc.get(), dContext, SK_PMColor4fTRANSPARENT);
sdc->clear(SK_PMColor4fWHITE);
SkPMColor4f dstColor = SK_PMColor4fWHITE;
draw_paint_with_dmsaa(sdc.get(), kTransYellow, SkBlendMode::kDarken);
dstColor = SkBlendMode_Apply(SkBlendMode::kDarken, kTransYellow, dstColor);
// Draw with aa after dmsaa. This should break up the render pass and issue a texture barrier.
draw_paint_with_aa(sdc.get(), kTransCyan, SkBlendMode::kDarken);
dstColor = SkBlendMode_Apply(SkBlendMode::kDarken, kTransCyan, dstColor);
check_sdc_color(reporter, sdc.get(), dContext, dstColor);
}
DEF_GPUTEST_FOR_CONTEXTS(DMSAA_dst_read_with_existing_barrier,
&sk_gpu_test::GrContextFactory::IsRenderingContext, reporter, ctxInfo,
require_dst_reads) {
auto dContext = ctxInfo.directContext();
auto sdc = skgpu::v1::SurfaceDrawContext::Make(dContext, GrColorType::kRGBA_8888, nullptr,
SkBackingFit::kApprox, {kWidth, kHeight},
kDMSAAProps);
// Initialize the texture and dmsaa attachment with transparent.
draw_paint_with_dmsaa(sdc.get(), SK_PMColor4fTRANSPARENT, SkBlendMode::kSrc);
check_sdc_color(reporter, sdc.get(), dContext, SK_PMColor4fTRANSPARENT);
sdc->clear(SK_PMColor4fWHITE);
SkPMColor4f dstColor = SK_PMColor4fWHITE;
// Blend to the texture (not the dmsaa attachment) with a dst read. This creates a texture
// barrier.
draw_paint_with_aa(sdc.get(), kTransYellow, SkBlendMode::kDarken);
dstColor = SkBlendMode_Apply(SkBlendMode::kDarken, kTransYellow, dstColor);
// Blend to the msaa attachment _without_ a dst read. This ensures we respect the prior texture
// barrier by splitting the opsTask.
draw_paint_with_dmsaa(sdc.get(), kTransCyan, SkBlendMode::kSrcOver);
dstColor = SkBlendMode_Apply(SkBlendMode::kSrcOver, kTransCyan, dstColor);
check_sdc_color(reporter, sdc.get(), dContext, dstColor);
}
// This test is used to test for crbug.com/1241134. The bug appears on Adreno5xx devices with OS
// PQ3A. It does not repro on the earlier PPR1 version since the extend blend func extension was not
// present on the older driver.
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(DMSAA_dual_source_blend_disable, reporter, ctxInfo) {
SkISize surfaceDims = {100, 100};
SkISize texDims = {50, 50};
auto context = ctxInfo.directContext();
auto sourceTexture = context->createBackendTexture(texDims.width(),
texDims.height(),
kRGBA_8888_SkColorType,
SkColors::kBlue,
GrMipMapped::kNo,
GrRenderable::kYes,
GrProtected::kNo);
auto sourceImage = SkImage::MakeFromTexture(context,
sourceTexture,
kTopLeft_GrSurfaceOrigin,
kRGBA_8888_SkColorType,
kPremul_SkAlphaType,
nullptr);
auto texture1 = context->createBackendTexture(surfaceDims.width(),
surfaceDims.height(),
kRGBA_8888_SkColorType,
SkColors::kRed,
GrMipMapped::kNo,
GrRenderable::kYes,
GrProtected::kNo);
auto texture2 = context->createBackendTexture(surfaceDims.width(),
surfaceDims.height(),
kRGBA_8888_SkColorType,
SkColors::kYellow,
GrMipMapped::kNo,
GrRenderable::kYes,
GrProtected::kNo);
SkPaint paint;
paint.setBlendMode(SkBlendMode::kSrc);
SkRect srcRect = SkRect::MakeIWH(texDims.width(), texDims.height());
SkRect dstRect = SkRect::MakeXYWH(texDims.width()/2, texDims.height()/2,
texDims.width(), texDims.height());
// First we do an image draw to a DMSAA surface with kSrc blend mode. This will trigger us to
// use dual source blending if supported.
// Note: The draw here doesn't actually use the dmsaa multisampled buffer. However, by using
// a dmsaa surface it forces us to use the FillRRectOp instead of the normal FillQuad path. It
// is unclear why, but using the FillRRectOp is required to repro the bug.
{
auto surface = SkSurface::MakeFromBackendTexture(context,
texture1,
kTopLeft_GrSurfaceOrigin,
1,
kRGBA_8888_SkColorType,
nullptr,
&kDMSAAProps);
surface->getCanvas()->drawImageRect(sourceImage,
srcRect,
dstRect,
SkSamplingOptions(),
&paint,
SkCanvas::kStrict_SrcRectConstraint);
// Make sure there isn't any batching
surface->flushAndSubmit();
}
// Next we do an image draw to a different surface that doesn't have the dmsaa flag. This will
// trigger use to disable blending. However, when the bug is present the driver still seems to
// try and use a "src2" blend value and ends up just writing the original dst color of yellow.
{
auto surface = SkSurface::MakeFromBackendTexture(context,
texture2,
kTopLeft_GrSurfaceOrigin,
1,
kRGBA_8888_SkColorType,
nullptr,
&kBasicProps);
surface->getCanvas()->drawImageRect(sourceImage,
srcRect,
dstRect,
SkSamplingOptions(),
&paint,
SkCanvas::kStrict_SrcRectConstraint);
surface->flushAndSubmit();
}
{
auto readImage = SkImage::MakeFromTexture(context,
texture2,
kTopLeft_GrSurfaceOrigin,
kRGBA_8888_SkColorType,
kPremul_SkAlphaType,
nullptr);
SkImageInfo dstIInfo = SkImageInfo::Make(texDims.width(),
texDims.height(),
kRGBA_8888_SkColorType,
kPremul_SkAlphaType,
nullptr);
SkBitmap bitmap;
bitmap.allocPixels(dstIInfo);
bool success = readImage->readPixels(context, bitmap.pixmap(), dstRect.fLeft, dstRect.fTop);
if (!success) {
ERRORF(reporter, "Failed to read pixels");
return;
}
auto pix = static_cast<const uint32_t*>(bitmap.getAddr(0, 0));
for (int x = 0; x < 50; ++x) {
for (int y = 0; y < 50; ++y) {
uint32_t pixColor = pix[x + y * 50];
if (pixColor != 0xFFFF0000) {
ERRORF(reporter, "Didn't get a blue pixel at %d, %d. Got 0x%8X",
x, y, pixColor);
continue;
}
}
}
}
sourceImage.reset();
// Need to make sure the gpu is fully finished before deleting the textures
context->flushAndSubmit(true);
context->deleteBackendTexture(sourceTexture);
context->deleteBackendTexture(texture1);
context->deleteBackendTexture(texture2);
}
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