joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 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" |
jvanverth | 28f9c60 | 2014-12-05 13:06:35 -0800 | [diff] [blame^] | 20 | |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 21 | #include "SkGpuDevice.h" |
jvanverth | 28f9c60 | 2014-12-05 13:06:35 -0800 | [diff] [blame^] | 22 | #include "SkHalf.h" |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 23 | |
| 24 | static const int DEV_W = 100, DEV_H = 100; |
jvanverth | 28f9c60 | 2014-12-05 13:06:35 -0800 | [diff] [blame^] | 25 | static const int FP_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4; |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 26 | static const float kMaxIntegerRepresentableInSPFloatingPoint = 16777216; // 2 ^ 24 |
| 27 | |
| 28 | static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H); |
| 29 | |
| 30 | DEF_GPUTEST(FloatingPointTextureTest, reporter, factory) { |
| 31 | float controlPixelData[FP_CONTROL_ARRAY_SIZE]; |
| 32 | float readBuffer[FP_CONTROL_ARRAY_SIZE]; |
| 33 | for (int i = 0; i < FP_CONTROL_ARRAY_SIZE; i += 4) { |
| 34 | controlPixelData[i] = FLT_MIN; |
| 35 | controlPixelData[i + 1] = FLT_MAX; |
| 36 | controlPixelData[i + 2] = FLT_EPSILON; |
| 37 | controlPixelData[i + 3] = kMaxIntegerRepresentableInSPFloatingPoint; |
| 38 | } |
| 39 | |
| 40 | for (int origin = 0; origin < 2; ++origin) { |
| 41 | int glCtxTypeCnt = 1; |
| 42 | glCtxTypeCnt = GrContextFactory::kGLContextTypeCnt; |
| 43 | for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) { |
bsalomon | f2703d8 | 2014-10-28 14:33:06 -0700 | [diff] [blame] | 44 | GrSurfaceDesc desc; |
| 45 | desc.fFlags = kRenderTarget_GrSurfaceFlag; |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 46 | desc.fWidth = DEV_W; |
| 47 | desc.fHeight = DEV_H; |
| 48 | desc.fConfig = kRGBA_float_GrPixelConfig; |
| 49 | desc.fOrigin = 0 == origin ? |
| 50 | kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin; |
| 51 | |
| 52 | GrContext* context = NULL; |
| 53 | GrContextFactory::GLContextType type = |
| 54 | static_cast<GrContextFactory::GLContextType>(glCtxType); |
| 55 | if (!GrContextFactory::IsRenderingGLContext(type)) { |
| 56 | continue; |
| 57 | } |
| 58 | context = factory->get(type); |
| 59 | if (NULL == context){ |
| 60 | continue; |
| 61 | } |
| 62 | |
| 63 | SkAutoTUnref<GrTexture> fpTexture(context->createUncachedTexture(desc, |
| 64 | NULL, |
| 65 | 0)); |
| 66 | |
| 67 | // Floating point textures are NOT supported everywhere |
| 68 | if (NULL == fpTexture) { |
| 69 | continue; |
| 70 | } |
| 71 | |
| 72 | // write square |
bsalomon | 81beccc | 2014-10-13 12:32:55 -0700 | [diff] [blame] | 73 | fpTexture->writePixels(0, 0, DEV_W, DEV_H, desc.fConfig, controlPixelData, 0); |
| 74 | fpTexture->readPixels(0, 0, DEV_W, DEV_H, desc.fConfig, readBuffer, 0); |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 75 | for (int j = 0; j < FP_CONTROL_ARRAY_SIZE; ++j) { |
| 76 | REPORTER_ASSERT(reporter, readBuffer[j] == controlPixelData[j]); |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
jvanverth | 28f9c60 | 2014-12-05 13:06:35 -0800 | [diff] [blame^] | 82 | static const int HALF_CONTROL_ARRAY_SIZE = DEV_W * DEV_H; |
| 83 | |
| 84 | DEF_GPUTEST(HalfFloatTextureTest, reporter, factory) { |
| 85 | SkHalf controlPixelData[HALF_CONTROL_ARRAY_SIZE]; |
| 86 | SkHalf readBuffer[HALF_CONTROL_ARRAY_SIZE]; |
| 87 | for (int i = 0; i < HALF_CONTROL_ARRAY_SIZE; i += 4) { |
| 88 | controlPixelData[i] = SK_HalfMin; |
| 89 | controlPixelData[i + 1] = SK_HalfMax; |
| 90 | controlPixelData[i + 2] = SK_HalfEpsilon; |
| 91 | controlPixelData[i + 3] = 0x6800; // 2^11 |
| 92 | } |
| 93 | |
| 94 | for (int origin = 0; origin < 2; ++origin) { |
| 95 | int glCtxTypeCnt = 1; |
| 96 | glCtxTypeCnt = GrContextFactory::kGLContextTypeCnt; |
| 97 | for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) { |
| 98 | GrSurfaceDesc desc; |
| 99 | desc.fFlags = kRenderTarget_GrSurfaceFlag; |
| 100 | desc.fWidth = DEV_W; |
| 101 | desc.fHeight = DEV_H; |
| 102 | desc.fConfig = kAlpha_half_GrPixelConfig; |
| 103 | desc.fOrigin = 0 == origin ? |
| 104 | kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin; |
| 105 | |
| 106 | GrContext* context = NULL; |
| 107 | GrContextFactory::GLContextType type = |
| 108 | static_cast<GrContextFactory::GLContextType>(glCtxType); |
| 109 | if (!GrContextFactory::IsRenderingGLContext(type)) { |
| 110 | continue; |
| 111 | } |
| 112 | context = factory->get(type); |
| 113 | if (NULL == context){ |
| 114 | continue; |
| 115 | } |
| 116 | |
| 117 | SkAutoTUnref<GrTexture> fpTexture(context->createUncachedTexture(desc, |
| 118 | NULL, |
| 119 | 0)); |
| 120 | |
| 121 | // 16-bit floating point textures are NOT supported everywhere |
| 122 | if (NULL == fpTexture) { |
| 123 | continue; |
| 124 | } |
| 125 | |
| 126 | // write square |
| 127 | fpTexture->writePixels(0, 0, DEV_W, DEV_H, desc.fConfig, controlPixelData, 0); |
| 128 | fpTexture->readPixels(0, 0, DEV_W, DEV_H, desc.fConfig, readBuffer, 0); |
| 129 | for (int j = 0; j < HALF_CONTROL_ARRAY_SIZE; ++j) { |
| 130 | SkASSERT(readBuffer[j] == controlPixelData[j]); |
| 131 | REPORTER_ASSERT(reporter, readBuffer[j] == controlPixelData[j]); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | } |
| 136 | |
joshualitt | ee5da55 | 2014-07-16 13:32:56 -0700 | [diff] [blame] | 137 | #endif |