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#if SK_SUPPORT_GPU 15#include <float.h> 16#include "Test.h" 17#include "GrContext.h" 18#include "GrTexture.h" 19#include "GrContextFactory.h" 20#include "SkGpuDevice.h" 21 22static const int DEV_W = 100, DEV_H = 100; 23static const int FP_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * sizeof(float); 24static const float kMaxIntegerRepresentableInSPFloatingPoint = 16777216; // 2 ^ 24 25 26static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); 27 28DEF_GPUTEST(FloatingPointTextureTest, reporter, factory) { 29 float controlPixelData[FP_CONTROL_ARRAY_SIZE]; 30 float readBuffer[FP_CONTROL_ARRAY_SIZE]; 31 for (int i = 0; i < FP_CONTROL_ARRAY_SIZE; i += 4) { 32 controlPixelData[i] = FLT_MIN; 33 controlPixelData[i + 1] = FLT_MAX; 34 controlPixelData[i + 2] = FLT_EPSILON; 35 controlPixelData[i + 3] = kMaxIntegerRepresentableInSPFloatingPoint; 36 } 37 38 for (int origin = 0; origin < 2; ++origin) { 39 int glCtxTypeCnt = 1; 40 glCtxTypeCnt = GrContextFactory::kGLContextTypeCnt; 41 for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) { 42 GrTextureDesc desc; 43 desc.fFlags = kRenderTarget_GrTextureFlagBit; 44 desc.fWidth = DEV_W; 45 desc.fHeight = DEV_H; 46 desc.fConfig = kRGBA_float_GrPixelConfig; 47 desc.fOrigin = 0 == origin ? 48 kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin; 49 50 GrContext* context = NULL; 51 GrContextFactory::GLContextType type = 52 static_cast<GrContextFactory::GLContextType>(glCtxType); 53 if (!GrContextFactory::IsRenderingGLContext(type)) { 54 continue; 55 } 56 context = factory->get(type); 57 if (NULL == context){ 58 continue; 59 } 60 61 SkAutoTUnref<GrTexture> fpTexture(context->createUncachedTexture(desc, 62 NULL, 63 0)); 64 65 // Floating point textures are NOT supported everywhere 66 if (NULL == fpTexture) { 67 continue; 68 } 69 70 // write square 71 context->writeTexturePixels(fpTexture, 0, 0, DEV_W, DEV_H, desc.fConfig, 72 controlPixelData, 0); 73 context->readTexturePixels(fpTexture, 0, 0, DEV_W, DEV_H, desc.fConfig, readBuffer, 0); 74 for (int j = 0; j < FP_CONTROL_ARRAY_SIZE; ++j) { 75 REPORTER_ASSERT(reporter, readBuffer[j] == controlPixelData[j]); 76 } 77 } 78 } 79} 80 81#endif 82