1/* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8/* 9 * This is a straightforward test of floating point textures, which are 10 * supported on some platforms. As of right now, this test only supports 11 * 32 bit floating point textures, and indeed floating point test values 12 * have been selected to require 32 bits of precision and full IEEE conformance 13 */ 14 15#include <float.h> 16#include "Test.h" 17 18#if SK_SUPPORT_GPU 19#include "GrContext.h" 20#include "GrContextPriv.h" 21#include "GrProxyProvider.h" 22#include "GrTextureProxy.h" 23#include "SkHalf.h" 24 25static const int DEV_W = 100, DEV_H = 100; 26 27template <typename T> 28void runFPTest(skiatest::Reporter* reporter, GrContext* context, 29 T min, T max, T epsilon, T maxInt, int arraySize, GrPixelConfig config) { 30 if (0 != arraySize % 4) { 31 REPORT_FAILURE(reporter, "(0 != arraySize % 4)", 32 SkString("arraySize must be divisible by 4.")); 33 return; 34 } 35 36 GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider(); 37 SkTDArray<T> controlPixelData, readBuffer; 38 controlPixelData.setCount(arraySize); 39 readBuffer.setCount(arraySize); 40 41 for (int i = 0; i < arraySize; i += 4) { 42 controlPixelData[i + 0] = min; 43 controlPixelData[i + 1] = max; 44 controlPixelData[i + 2] = epsilon; 45 controlPixelData[i + 3] = maxInt; 46 } 47 48 for (int origin = 0; origin < 2; ++origin) { 49 GrSurfaceDesc desc; 50 desc.fFlags = kRenderTarget_GrSurfaceFlag; 51 desc.fOrigin = 0 == origin ? kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin; 52 desc.fWidth = DEV_W; 53 desc.fHeight = DEV_H; 54 desc.fConfig = config; 55 56 sk_sp<GrTextureProxy> fpProxy = proxyProvider->createTextureProxy( 57 desc, SkBudgeted::kNo, controlPixelData.begin(), 0); 58 // Floating point textures are NOT supported everywhere 59 if (!fpProxy) { 60 continue; 61 } 62 63 sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext( 64 std::move(fpProxy)); 65 REPORTER_ASSERT(reporter, sContext); 66 67 bool result = context->contextPriv().readSurfacePixels(sContext.get(), 68 0, 0, DEV_W, DEV_H, 69 desc.fConfig, nullptr, 70 readBuffer.begin(), 0); 71 REPORTER_ASSERT(reporter, result); 72 REPORTER_ASSERT(reporter, 73 0 == memcmp(readBuffer.begin(), controlPixelData.begin(), readBuffer.bytes())); 74 } 75} 76 77static const int RGBA32F_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4; 78static const float kMaxIntegerRepresentableInSPFloatingPoint = 16777216; // 2 ^ 24 79 80DEF_GPUTEST_FOR_RENDERING_CONTEXTS(FloatingPointTextureTest, reporter, ctxInfo) { 81 runFPTest<float>(reporter, ctxInfo.grContext(), FLT_MIN, FLT_MAX, FLT_EPSILON, 82 kMaxIntegerRepresentableInSPFloatingPoint, 83 RGBA32F_CONTROL_ARRAY_SIZE, kRGBA_float_GrPixelConfig); 84} 85 86static const int RG32F_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 2; 87 88DEF_GPUTEST_FOR_RENDERING_CONTEXTS(FloatingPointTextureTest_RG, reporter, ctxInfo) { 89 runFPTest<float>(reporter, ctxInfo.grContext(), FLT_MIN, FLT_MAX, FLT_EPSILON, 90 kMaxIntegerRepresentableInSPFloatingPoint, 91 RG32F_CONTROL_ARRAY_SIZE, kRG_float_GrPixelConfig); 92} 93 94static const int HALF_ALPHA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 1 /*alpha-only*/; 95static const SkHalf kMaxIntegerRepresentableInHalfFloatingPoint = 0x6800; // 2 ^ 11 96 97DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatAlphaTextureTest, reporter, ctxInfo) { 98 runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon, 99 kMaxIntegerRepresentableInHalfFloatingPoint, 100 HALF_ALPHA_CONTROL_ARRAY_SIZE, kAlpha_half_GrPixelConfig); 101} 102 103static const int HALF_RGBA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4 /*RGBA*/; 104 105DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatRGBATextureTest, reporter, ctxInfo) { 106 runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon, 107 kMaxIntegerRepresentableInHalfFloatingPoint, 108 HALF_RGBA_CONTROL_ARRAY_SIZE, kRGBA_half_GrPixelConfig); 109} 110 111#endif 112