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/*
* Copyright 2017 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 GPU-backend specific test. It relies on static intializers to work
#include "SkTypes.h"
#if SK_SUPPORT_GPU
#include "GrContextFactory.h"
#include "GrContextPriv.h"
#include "GrGpu.h"
#include "GrResourceProvider.h"
#include "GrSurfaceProxy.h"
#include "GrTexture.h"
#include "GrTest.h"
#include "SkGr.h"
#include "SkSurface.h"
#include "Test.h"
using sk_gpu_test::GrContextFactory;
void fill_transfer_data(int left, int top, int width, int height, int bufferWidth,
GrColor* data) {
// build red-green gradient
for (int j = top; j < top + height; ++j) {
for (int i = left; i < left + width; ++i) {
unsigned int red = (unsigned int)(256.f*((i - left) / (float)width));
unsigned int green = (unsigned int)(256.f*((j - top) / (float)height));
data[i + j*bufferWidth] = GrColorPackRGBA(red - (red>>8),
green - (green>>8), 0xff, 0xff);
}
}
}
bool does_full_buffer_contain_correct_values(GrColor* srcBuffer,
GrColor* dstBuffer,
int width,
int height,
int bufferWidth,
int bufferHeight,
GrSurfaceOrigin origin) {
GrColor* srcPtr = srcBuffer;
bool bottomUp = SkToBool(kBottomLeft_GrSurfaceOrigin == origin);
GrColor* dstPtr = bottomUp ? dstBuffer + bufferWidth*(bufferHeight-1) : dstBuffer;
int dstIncrement = bottomUp ? -bufferWidth : +bufferWidth;
for (int j = 0; j < height; ++j) {
for (int i = 0; i < width; ++i) {
if (srcPtr[i] != dstPtr[i]) {
return false;
}
}
srcPtr += bufferWidth;
dstPtr += dstIncrement;
}
return true;
}
void basic_transfer_test(skiatest::Reporter* reporter, GrContext* context, GrPixelConfig config,
GrSurfaceOrigin origin, bool renderTarget) {
if (GrCaps::kNone_MapFlags == context->caps()->mapBufferFlags()) {
return;
}
auto resourceProvider = context->contextPriv().resourceProvider();
// set up the data
const int kTextureWidth = 16;
const int kTextureHeight = 16;
const int kBufferWidth = 20;
const int kBufferHeight = 16;
size_t rowBytes = kBufferWidth * sizeof(GrColor);
SkAutoTMalloc<GrColor> srcBuffer(kBufferWidth*kBufferHeight);
SkAutoTMalloc<GrColor> dstBuffer(kBufferWidth*kBufferHeight);
fill_transfer_data(0, 0, kTextureWidth, kTextureHeight, kBufferWidth, srcBuffer.get());
// create and fill transfer buffer
size_t size = rowBytes*kBufferHeight;
uint32_t bufferFlags = GrResourceProvider::kNoPendingIO_Flag;
sk_sp<GrBuffer> buffer(resourceProvider->createBuffer(size,
kXferCpuToGpu_GrBufferType,
kDynamic_GrAccessPattern,
bufferFlags));
if (!buffer) {
return;
}
void* data = buffer->map();
memcpy(data, srcBuffer.get(), size);
buffer->unmap();
// create texture
GrSurfaceDesc desc;
desc.fFlags = renderTarget ? kRenderTarget_GrSurfaceFlag : kNone_GrSurfaceFlags;
desc.fOrigin = origin;
desc.fWidth = kTextureWidth;
desc.fHeight = kTextureHeight;
desc.fConfig = config;
desc.fSampleCnt = 0;
sk_sp<GrTexture> tex = resourceProvider->createTexture(desc, SkBudgeted::kNo);
//////////////////////////
// transfer full data
bool result;
result = context->getGpu()->transferPixels(tex.get(), 0, 0, kTextureWidth, kTextureHeight,
config, buffer.get(), 0, rowBytes);
REPORTER_ASSERT(reporter, result);
memset(dstBuffer.get(), 0xCDCD, size);
result = context->getGpu()->readPixels(tex.get(), origin, 0, 0, kTextureWidth, kTextureHeight,
config, dstBuffer.get(), rowBytes);
if (result) {
REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_values(srcBuffer,
dstBuffer,
kTextureWidth,
kTextureHeight,
kBufferWidth,
kBufferHeight,
origin));
}
//////////////////////////
// transfer partial data
const int kLeft = 2;
const int kTop = 10;
const int kWidth = 10;
const int kHeight = 2;
// change color of subrectangle
fill_transfer_data(kLeft, kTop, kWidth, kHeight, kBufferWidth, srcBuffer.get());
data = buffer->map();
memcpy(data, srcBuffer.get(), size);
buffer->unmap();
size_t offset = sizeof(GrColor)*(kTop*kBufferWidth + kLeft);
result = context->getGpu()->transferPixels(tex.get(), kLeft, kTop, kWidth, kHeight, config,
buffer.get(), offset, rowBytes);
REPORTER_ASSERT(reporter, result);
memset(dstBuffer.get(), 0xCDCD, size);
result = context->getGpu()->readPixels(tex.get(), origin, 0, 0, kTextureWidth, kTextureHeight,
config, dstBuffer.get(), rowBytes);
if (result) {
REPORTER_ASSERT(reporter, does_full_buffer_contain_correct_values(srcBuffer,
dstBuffer,
kTextureWidth,
kTextureHeight,
kBufferWidth,
kBufferHeight,
origin));
}
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(TransferPixelsTest, reporter, ctxInfo) {
// RGBA
basic_transfer_test(reporter, ctxInfo.grContext(), kRGBA_8888_GrPixelConfig,
kTopLeft_GrSurfaceOrigin, false);
basic_transfer_test(reporter, ctxInfo.grContext(), kRGBA_8888_GrPixelConfig,
kTopLeft_GrSurfaceOrigin, true);
basic_transfer_test(reporter, ctxInfo.grContext(), kRGBA_8888_GrPixelConfig,
kBottomLeft_GrSurfaceOrigin, false);
basic_transfer_test(reporter, ctxInfo.grContext(), kRGBA_8888_GrPixelConfig,
kBottomLeft_GrSurfaceOrigin, true);
// BGRA
basic_transfer_test(reporter, ctxInfo.grContext(), kBGRA_8888_GrPixelConfig,
kTopLeft_GrSurfaceOrigin, false);
basic_transfer_test(reporter, ctxInfo.grContext(), kBGRA_8888_GrPixelConfig,
kTopLeft_GrSurfaceOrigin, true);
basic_transfer_test(reporter, ctxInfo.grContext(), kBGRA_8888_GrPixelConfig,
kBottomLeft_GrSurfaceOrigin, false);
basic_transfer_test(reporter, ctxInfo.grContext(), kBGRA_8888_GrPixelConfig,
kBottomLeft_GrSurfaceOrigin, true);
}
#endif
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