skia2/tests/VkYcbcrSamplerTest.cpp
Robert Phillips 85aa42820e Move VkYcbcrSamplerHelper's context functionality into VkTestHelper
This should make the YCbCr sampler helper usable in a GM (with a normal Vk context).

Change-Id: I75451f6ca934f7b59c48349c77234856d0946a12
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/295766
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
2020-06-11 19:39:21 +00:00

131 lines
4.9 KiB
C++

/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkTypes.h"
#if SK_SUPPORT_GPU && defined(SK_VULKAN)
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkSurface.h"
#include "include/gpu/GrContext.h"
#include "tests/Test.h"
#include "tools/gpu/vk/VkTestHelper.h"
#include "tools/gpu/vk/VkYcbcrSamplerHelper.h"
const size_t kImageWidth = 8;
const size_t kImageHeight = 8;
static int round_and_clamp(float x) {
int r = static_cast<int>(round(x));
if (r > 255) return 255;
if (r < 0) return 0;
return r;
}
DEF_GPUTEST(VkYCbcrSampler_DrawImageWithYcbcrSampler, reporter, options) {
VkTestHelper testHelper(false);
if (!testHelper.init()) {
ERRORF(reporter, "VkTestHelper initialization failed.");
return;
}
VkYcbcrSamplerHelper ycbcrHelper(testHelper.grContext());
if (!ycbcrHelper.isYCbCrSupported()) {
return;
}
sk_sp<SkImage> srcImage = ycbcrHelper.createI420Image(kImageWidth, kImageHeight);
if (!srcImage) {
ERRORF(reporter, "Failed to create I420 image");
return;
}
sk_sp<SkSurface> surface = SkSurface::MakeRenderTarget(
testHelper.grContext(), SkBudgeted::kNo,
SkImageInfo::Make(kImageWidth, kImageHeight, kN32_SkColorType, kPremul_SkAlphaType));
if (!surface) {
ERRORF(reporter, "Failed to create target SkSurface");
return;
}
surface->getCanvas()->drawImage(srcImage, 0, 0);
surface->flushAndSubmit();
std::vector<uint8_t> readbackData(kImageWidth * kImageHeight * 4);
if (!surface->readPixels(SkImageInfo::Make(kImageWidth, kImageHeight, kRGBA_8888_SkColorType,
kOpaque_SkAlphaType),
readbackData.data(), kImageWidth * 4, 0, 0)) {
ERRORF(reporter, "Readback failed");
return;
}
// Allow resulting color to be off by 1 in each channel as some Vulkan implementations do not
// round YCbCr sampler result properly.
const int kColorTolerance = 1;
// Verify results only for pixels with even coordinates, since others use
// interpolated U & V channels.
for (size_t y = 0; y < kImageHeight; y += 2) {
for (size_t x = 0; x < kImageWidth; x += 2) {
auto y2 = VkYcbcrSamplerHelper::GetExpectedY(x, y, kImageWidth, kImageHeight);
auto [u, v] = VkYcbcrSamplerHelper::GetExpectedUV(x, y, kImageWidth, kImageHeight);
// createI420Image() initializes the image with VK_SAMPLER_YCBCR_RANGE_ITU_NARROW.
float yChannel = (static_cast<float>(y2) - 16.0) / 219.0;
float uChannel = (static_cast<float>(u) - 128.0) / 224.0;
float vChannel = (static_cast<float>(v) - 128.0) / 224.0;
// BR.709 conversion as specified in
// https://www.khronos.org/registry/DataFormat/specs/1.2/dataformat.1.2.html#MODEL_YUV
int expectedR = round_and_clamp((yChannel + 1.5748f * vChannel) * 255.0);
int expectedG = round_and_clamp((yChannel - 0.13397432f / 0.7152f * uChannel -
0.33480248f / 0.7152f * vChannel) *
255.0);
int expectedB = round_and_clamp((yChannel + 1.8556f * uChannel) * 255.0);
int r = readbackData[(y * kImageWidth + x) * 4];
if (abs(r - expectedR) > kColorTolerance) {
ERRORF(reporter, "R should be %d, but is %d at (%d, %d)", expectedR, r, x, y);
}
int g = readbackData[(y * kImageWidth + x) * 4 + 1];
if (abs(g - expectedG) > kColorTolerance) {
ERRORF(reporter, "G should be %d, but is %d at (%d, %d)", expectedG, g, x, y);
}
int b = readbackData[(y * kImageWidth + x) * 4 + 2];
if (abs(b - expectedB) > kColorTolerance) {
ERRORF(reporter, "B should be %d, but is %d at (%d, %d)", expectedB, b, x, y);
}
}
}
}
// Verifies that it's not possible to allocate Ycbcr texture directly.
DEF_GPUTEST(VkYCbcrSampler_NoYcbcrSurface, reporter, options) {
VkTestHelper testHelper(false);
if (!testHelper.init()) {
ERRORF(reporter, "VkTestHelper initialization failed.");
return;
}
VkYcbcrSamplerHelper ycbcrHelper(testHelper.grContext());
if (!ycbcrHelper.isYCbCrSupported()) {
return;
}
GrBackendTexture texture = testHelper.grContext()->createBackendTexture(
kImageWidth, kImageHeight, GrBackendFormat::MakeVk(VK_FORMAT_G8_B8R8_2PLANE_420_UNORM),
GrMipMapped::kNo, GrRenderable::kNo, GrProtected::kNo);
if (texture.isValid()) {
ERRORF(reporter,
"GrContext::createBackendTexture() didn't fail as expected for Ycbcr format.");
}
}
#endif // SK_SUPPORT_GPU && defined(SK_VULKAN)