blob: 3645b3086015b2becf70e4cb0d8d839b0c90afb5 [file] [log] [blame]
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/*
* This is a straightforward test of floating point textures, which are
* supported on some platforms. As of right now, this test only supports
* 32 bit floating point textures, and indeed floating point test values
* have been selected to require 32 bits of precision and full IEEE conformance
*/
#include "tests/Test.h"
#include "include/gpu/GrContext.h"
#include "include/private/SkHalf.h"
#include "src/gpu/GrContextPriv.h"
#include "src/gpu/GrImageInfo.h"
#include "src/gpu/GrProxyProvider.h"
#include "src/gpu/GrTextureProxy.h"
#include "tools/gpu/ProxyUtils.h"
#include <float.h>
static const int DEV_W = 100, DEV_H = 100;
template <typename T>
void runFPTest(skiatest::Reporter* reporter, GrContext* context, T min, T max, T epsilon, T maxInt,
int arraySize, GrColorType colorType) {
if (0 != arraySize % 4) {
REPORT_FAILURE(reporter, "(0 != arraySize % 4)",
SkString("arraySize must be divisible by 4."));
return;
}
SkTDArray<T> controlPixelData, readBuffer;
controlPixelData.setCount(arraySize);
readBuffer.setCount(arraySize);
for (int i = 0; i < arraySize; i += 4) {
controlPixelData[i + 0] = min;
controlPixelData[i + 1] = max;
controlPixelData[i + 2] = epsilon;
controlPixelData[i + 3] = maxInt;
}
for (auto origin : {kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin}) {
auto fpProxy = sk_gpu_test::MakeTextureProxyFromData(
context, GrRenderable::kYes, origin,
{colorType, kPremul_SkAlphaType, nullptr, DEV_W, DEV_H},
controlPixelData.begin(), 0);
// Floating point textures are NOT supported everywhere
if (!fpProxy) {
continue;
}
auto sContext = context->priv().makeWrappedSurfaceContext(std::move(fpProxy), colorType,
kPremul_SkAlphaType);
REPORTER_ASSERT(reporter, sContext);
bool result = sContext->readPixels({colorType, kPremul_SkAlphaType, nullptr, DEV_W, DEV_H},
readBuffer.begin(), 0, {0, 0}, context);
REPORTER_ASSERT(reporter, result);
REPORTER_ASSERT(reporter,
0 == memcmp(readBuffer.begin(), controlPixelData.begin(), readBuffer.bytes()));
}
}
static const int HALF_ALPHA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 1 /*alpha-only*/;
static const SkHalf kMaxIntegerRepresentableInHalfFloatingPoint = 0x6800; // 2 ^ 11
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatAlphaTextureTest, reporter, ctxInfo) {
runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
kMaxIntegerRepresentableInHalfFloatingPoint, HALF_ALPHA_CONTROL_ARRAY_SIZE,
GrColorType::kAlpha_F16);
}
static const int HALF_RGBA_CONTROL_ARRAY_SIZE = DEV_W * DEV_H * 4 /*RGBA*/;
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(HalfFloatRGBATextureTest, reporter, ctxInfo) {
runFPTest<SkHalf>(reporter, ctxInfo.grContext(), SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
kMaxIntegerRepresentableInHalfFloatingPoint, HALF_RGBA_CONTROL_ARRAY_SIZE,
GrColorType::kRGBA_F16);
}