skia2/tests/FloatingPointTextureTest.cpp
Greg Daniel 719239cd69 Move all Ganesh source files into ganesh subdirectory.
Change-Id: I238d29ba0250224fa593845ae65192653f58faff
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/528156
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
2022-04-07 21:06:50 +00:00

95 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/core/SkColorSpace.h"
#include "include/gpu/GrDirectContext.h"
#include "include/private/SkHalf.h"
#include "src/gpu/ganesh/GrDirectContextPriv.h"
#include "src/gpu/ganesh/GrImageInfo.h"
#include "src/gpu/ganesh/GrProxyProvider.h"
#include "src/gpu/ganesh/GrTextureProxy.h"
#include "src/gpu/ganesh/SurfaceContext.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 sc = dContext->priv().makeSC(std::move(fpView), info.colorInfo());
REPORTER_ASSERT(reporter, sc);
GrPixmap readPixmap(info, readBuffer.begin(), info.minRowBytes());
bool result = sc->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);
}