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94 lines
3.6 KiB
94 lines
3.6 KiB
4 months ago
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/*
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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 "tests/Test.h"
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#include "include/gpu/GrDirectContext.h"
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#include "include/private/SkHalf.h"
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#include "src/gpu/GrDirectContextPriv.h"
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#include "src/gpu/GrImageInfo.h"
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#include "src/gpu/GrProxyProvider.h"
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#include "src/gpu/GrSurfaceContext.h"
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#include "src/gpu/GrTextureProxy.h"
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#include "tools/gpu/ProxyUtils.h"
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#include <float.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, GrDirectContext* dContext,
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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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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 (auto origin : {kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin}) {
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GrImageInfo info(colorType, kPremul_SkAlphaType, nullptr, {DEV_W, DEV_H});
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GrCPixmap controlPixmap(info, controlPixelData.begin(), info.minRowBytes());
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auto fpView = sk_gpu_test::MakeTextureProxyViewFromData(dContext,
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GrRenderable::kYes,
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origin,
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controlPixmap);
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// Floating point textures are NOT supported everywhere
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if (!fpView) {
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continue;
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}
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auto sContext = GrSurfaceContext::Make(dContext, std::move(fpView), info.colorInfo());
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REPORTER_ASSERT(reporter, sContext);
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GrPixmap readPixmap(info, readBuffer.begin(), info.minRowBytes());
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bool result = sContext->readPixels(dContext, readPixmap, {0, 0});
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REPORTER_ASSERT(reporter, result);
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REPORTER_ASSERT(reporter,
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!memcmp(readBuffer.begin(), controlPixelData.begin(), readBuffer.bytes()));
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}
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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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auto direct = ctxInfo.directContext();
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runFPTest<SkHalf>(reporter, direct, 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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auto direct = ctxInfo.directContext();
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runFPTest<SkHalf>(reporter, direct, 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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