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- /*
- * Copyright 2014 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- /*
- * This is a straightforward test of floating point textures, which are
- * supported on some platforms. As of right now, this test only supports
- * 32 bit floating point textures, and indeed floating point test values
- * have been selected to require 32 bits of precision and full IEEE conformance
- */
- #include "tests/Test.h"
- #include "include/gpu/GrContext.h"
- #include "include/private/SkHalf.h"
- #include "src/gpu/GrContextPriv.h"
- #include "src/gpu/GrProxyProvider.h"
- #include "src/gpu/GrTextureProxy.h"
- #include "tools/gpu/ProxyUtils.h"
- #include <float.h>
- static const int DEV_W = 100, DEV_H = 100;
- template <typename T>
- void runFPTest(skiatest::Reporter* reporter, GrContext* context, T min, T max, T epsilon, T maxInt,
- int arraySize, GrColorType colorType) {
- if (0 != arraySize % 4) {
- REPORT_FAILURE(reporter, "(0 != arraySize % 4)",
- SkString("arraySize must be divisible by 4."));
- return;
- }
- SkTDArray<T> controlPixelData, readBuffer;
- controlPixelData.setCount(arraySize);
- readBuffer.setCount(arraySize);
- for (int i = 0; i < arraySize; i += 4) {
- controlPixelData[i + 0] = min;
- controlPixelData[i + 1] = max;
- controlPixelData[i + 2] = epsilon;
- controlPixelData[i + 3] = maxInt;
- }
- for (auto origin : {kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin}) {
- auto fpProxy = sk_gpu_test::MakeTextureProxyFromData(context, GrRenderable::kYes, DEV_W,
- DEV_H, colorType, kPremul_SkAlphaType,
- origin, controlPixelData.begin(), 0);
- // Floating point textures are NOT supported everywhere
- if (!fpProxy) {
- continue;
- }
- sk_sp<GrSurfaceContext> sContext = context->priv().makeWrappedSurfaceContext(
- std::move(fpProxy), colorType, kPremul_SkAlphaType);
- REPORTER_ASSERT(reporter, sContext);
- bool result = sContext->readPixels({colorType, kPremul_SkAlphaType, nullptr, DEV_W, DEV_H},
- readBuffer.begin(), 0, {0, 0}, context);
- REPORTER_ASSERT(reporter, result);
- REPORTER_ASSERT(reporter,
- 0 == memcmp(readBuffer.begin(), controlPixelData.begin(), readBuffer.bytes()));
- }
- }
- static const int HALF_ALPHA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 1 /*alpha-only*/;
- static const SkHalf kMaxIntegerRepresentableInHalfFloatingPoint = 0x6800; // 2 ^ 11
- DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatAlphaTextureTest, reporter, ctxInfo) {
- runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
- kMaxIntegerRepresentableInHalfFloatingPoint, HALF_ALPHA_CONTROL_ARRAY_SIZE,
- GrColorType::kAlpha_F16);
- }
- static const int HALF_RGBA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4 /*RGBA*/;
- DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatRGBATextureTest, reporter, ctxInfo) {
- runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
- kMaxIntegerRepresentableInHalfFloatingPoint, HALF_RGBA_CONTROL_ARRAY_SIZE,
- GrColorType::kRGBA_F16);
- }
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