94 lines
3.6 KiB
C++
94 lines
3.6 KiB
C++
/*
|
|
* 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/GrDirectContext.h"
|
|
#include "include/private/SkHalf.h"
|
|
#include "src/gpu/GrDirectContextPriv.h"
|
|
#include "src/gpu/GrImageInfo.h"
|
|
#include "src/gpu/GrProxyProvider.h"
|
|
#include "src/gpu/GrSurfaceContext.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, GrDirectContext* dContext,
|
|
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}) {
|
|
GrImageInfo info(colorType, kPremul_SkAlphaType, nullptr, {DEV_W, DEV_H});
|
|
GrCPixmap controlPixmap(info, controlPixelData.begin(), info.minRowBytes());
|
|
auto fpView = sk_gpu_test::MakeTextureProxyViewFromData(dContext,
|
|
GrRenderable::kYes,
|
|
origin,
|
|
controlPixmap);
|
|
// Floating point textures are NOT supported everywhere
|
|
if (!fpView) {
|
|
continue;
|
|
}
|
|
|
|
auto sContext = GrSurfaceContext::Make(dContext, std::move(fpView), info.colorInfo());
|
|
REPORTER_ASSERT(reporter, sContext);
|
|
|
|
GrPixmap readPixmap(info, readBuffer.begin(), info.minRowBytes());
|
|
bool result = sContext->readPixels(dContext, readPixmap, {0, 0});
|
|
REPORTER_ASSERT(reporter, result);
|
|
REPORTER_ASSERT(reporter,
|
|
!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) {
|
|
auto direct = ctxInfo.directContext();
|
|
|
|
runFPTest<SkHalf>(reporter, direct, 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) {
|
|
auto direct = ctxInfo.directContext();
|
|
|
|
runFPTest<SkHalf>(reporter, direct, SK_HalfMin, SK_HalfMax, SK_HalfEpsilon,
|
|
kMaxIntegerRepresentableInHalfFloatingPoint, HALF_RGBA_CONTROL_ARRAY_SIZE,
|
|
GrColorType::kRGBA_F16);
|
|
}
|