c320b15768
This begins the journey towards using different types to refer to CPU data and GPU texture formats. This is one part of removing GrPixelConfig and more directly using GL/VK texture formats GrColorType represents a particular layout of color/gray/alpha channels in CPU memory. It does not refer to texture formats or sRGB-encoding. It is basically SkColorType specialized to the GPU backend with some formats added and some removed. Read/WritePixel interfaces use GrColorType to describe the CPU side of the transaction. There's still a lot of punting to GrPixelConfig in API-specific code. There's a lot more to be done. Bug: 6718 Bug: 7580 Change-Id: I8d813ae9a4416a06596f22a4b87da02091989718 Reviewed-on: https://skia-review.googlesource.com/107264 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
110 lines
4.3 KiB
C++
110 lines
4.3 KiB
C++
/*
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* Copyright 2014 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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/*
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* This is a straightforward test of floating point textures, which are
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* supported on some platforms. As of right now, this test only supports
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* 32 bit floating point textures, and indeed floating point test values
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* have been selected to require 32 bits of precision and full IEEE conformance
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*/
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#include <float.h>
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#include "Test.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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#include "GrContextPriv.h"
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#include "GrProxyProvider.h"
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#include "GrTextureProxy.h"
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#include "SkHalf.h"
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static const int DEV_W = 100, DEV_H = 100;
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template <typename T>
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void runFPTest(skiatest::Reporter* reporter, GrContext* context, T min, T max, T epsilon, T maxInt,
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int arraySize, GrColorType colorType) {
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if (0 != arraySize % 4) {
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REPORT_FAILURE(reporter, "(0 != arraySize % 4)",
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SkString("arraySize must be divisible by 4."));
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return;
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}
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GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
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SkTDArray<T> controlPixelData, readBuffer;
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controlPixelData.setCount(arraySize);
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readBuffer.setCount(arraySize);
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for (int i = 0; i < arraySize; i += 4) {
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controlPixelData[i + 0] = min;
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controlPixelData[i + 1] = max;
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controlPixelData[i + 2] = epsilon;
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controlPixelData[i + 3] = maxInt;
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}
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for (int origin = 0; origin < 2; ++origin) {
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GrSurfaceDesc desc;
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desc.fFlags = kRenderTarget_GrSurfaceFlag;
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desc.fOrigin = 0 == origin ? kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin;
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desc.fWidth = DEV_W;
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desc.fHeight = DEV_H;
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desc.fConfig = GrColorTypeToPixelConfig(colorType, GrSRGBEncoded::kNo);
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sk_sp<GrTextureProxy> fpProxy = proxyProvider->createTextureProxy(
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desc, SkBudgeted::kNo, controlPixelData.begin(), 0);
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// Floating point textures are NOT supported everywhere
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if (!fpProxy) {
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continue;
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}
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sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
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std::move(fpProxy));
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REPORTER_ASSERT(reporter, sContext);
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bool result = context->contextPriv().readSurfacePixels(
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sContext.get(), 0, 0, DEV_W, DEV_H, colorType, nullptr, readBuffer.begin(), 0);
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REPORTER_ASSERT(reporter, result);
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REPORTER_ASSERT(reporter,
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0 == memcmp(readBuffer.begin(), controlPixelData.begin(), readBuffer.bytes()));
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}
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}
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static const int RGBA32F_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4;
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static const float kMaxIntegerRepresentableInSPFloatingPoint = 16777216; // 2 ^ 24
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(FloatingPointTextureTest, reporter, ctxInfo) {
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runFPTest<float>(reporter, ctxInfo.grContext(), FLT_MIN, FLT_MAX, FLT_EPSILON,
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kMaxIntegerRepresentableInSPFloatingPoint, RGBA32F_CONTROL_ARRAY_SIZE,
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GrColorType::kRGBA_F32);
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}
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static const int RG32F_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 2;
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(FloatingPointTextureTest_RG, reporter, ctxInfo) {
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runFPTest<float>(reporter, ctxInfo.grContext(), FLT_MIN, FLT_MAX, FLT_EPSILON,
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kMaxIntegerRepresentableInSPFloatingPoint, RG32F_CONTROL_ARRAY_SIZE,
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GrColorType::kRG_F32);
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}
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static const int HALF_ALPHA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 1 /*alpha-only*/;
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static const SkHalf kMaxIntegerRepresentableInHalfFloatingPoint = 0x6800; // 2 ^ 11
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatAlphaTextureTest, reporter, ctxInfo) {
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runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
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kMaxIntegerRepresentableInHalfFloatingPoint, HALF_ALPHA_CONTROL_ARRAY_SIZE,
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GrColorType::kAlpha_F16);
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}
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static const int HALF_RGBA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4 /*RGBA*/;
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatRGBATextureTest, reporter, ctxInfo) {
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runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
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kMaxIntegerRepresentableInHalfFloatingPoint, HALF_RGBA_CONTROL_ARRAY_SIZE,
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GrColorType::kRGBA_F16);
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}
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#endif
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