82 lines
3.0 KiB
C++
82 lines
3.0 KiB
C++
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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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#if SK_SUPPORT_GPU
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#include <float.h>
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#include "Test.h"
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#include "GrContext.h"
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#include "GrTexture.h"
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#include "GrContextFactory.h"
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#include "SkGpuDevice.h"
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static const int DEV_W = 100, DEV_H = 100;
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static const int FP_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * sizeof(float);
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static const float kMaxIntegerRepresentableInSPFloatingPoint = 16777216; // 2 ^ 24
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static const SkIRect DEV_RECT = SkIRect::MakeWH(DEV_W, DEV_H);
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DEF_GPUTEST(FloatingPointTextureTest, reporter, factory) {
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float controlPixelData[FP_CONTROL_ARRAY_SIZE];
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float readBuffer[FP_CONTROL_ARRAY_SIZE];
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for (int i = 0; i < FP_CONTROL_ARRAY_SIZE; i += 4) {
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controlPixelData[i] = FLT_MIN;
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controlPixelData[i + 1] = FLT_MAX;
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controlPixelData[i + 2] = FLT_EPSILON;
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controlPixelData[i + 3] = kMaxIntegerRepresentableInSPFloatingPoint;
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}
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for (int origin = 0; origin < 2; ++origin) {
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int glCtxTypeCnt = 1;
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glCtxTypeCnt = GrContextFactory::kGLContextTypeCnt;
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for (int glCtxType = 0; glCtxType < glCtxTypeCnt; ++glCtxType) {
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GrTextureDesc desc;
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desc.fFlags = kRenderTarget_GrTextureFlagBit;
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desc.fWidth = DEV_W;
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desc.fHeight = DEV_H;
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desc.fConfig = kRGBA_float_GrPixelConfig;
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desc.fOrigin = 0 == origin ?
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kTopLeft_GrSurfaceOrigin : kBottomLeft_GrSurfaceOrigin;
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GrContext* context = NULL;
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GrContextFactory::GLContextType type =
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static_cast<GrContextFactory::GLContextType>(glCtxType);
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if (!GrContextFactory::IsRenderingGLContext(type)) {
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continue;
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}
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context = factory->get(type);
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if (NULL == context){
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continue;
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}
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SkAutoTUnref<GrTexture> fpTexture(context->createUncachedTexture(desc,
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NULL,
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0));
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// Floating point textures are NOT supported everywhere
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if (NULL == fpTexture) {
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continue;
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}
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// write square
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context->writeTexturePixels(fpTexture, 0, 0, DEV_W, DEV_H, desc.fConfig,
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controlPixelData, 0);
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context->readTexturePixels(fpTexture, 0, 0, DEV_W, DEV_H, desc.fConfig, readBuffer, 0);
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for (int j = 0; j < FP_CONTROL_ARRAY_SIZE; ++j) {
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REPORTER_ASSERT(reporter, readBuffer[j] == controlPixelData[j]);
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}
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}
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}
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}
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#endif
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