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/*
* Copyright 2016 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 using packed pixel configs (4444, 565).
* This test will make sure that these RGBA_4444 and RGB_565 are always supported
* as valid texturing configs.
*/
#include "Test.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrProxyProvider.h"
#include "GrTextureProxy.h"
#include "ProxyUtils.h"
static const int DEV_W = 10, DEV_H = 10;
static const uint8_t TOL = 0x4;
static void check_component(skiatest::Reporter* reporter, uint8_t control, uint8_t test) {
uint8_t diff = 0;
if (control >= test) {
diff = control - test;
} else {
diff = test - control;
}
REPORTER_ASSERT(reporter, diff < TOL);
}
static uint8_t expand_value(uint8_t original, int sigBits) {
SkASSERT(sigBits >= 4);
uint8_t inSigBitShift = 8 - sigBits;
uint8_t duplBitShift = sigBits - inSigBitShift;
return (original << inSigBitShift) + (original >> duplBitShift);
}
static void check_4444(skiatest::Reporter* reporter,
const SkTDArray<uint16_t>& controlData,
const SkTDArray<uint32_t>& readBuffer) {
for (int j = 0; j < DEV_H; ++j) {
for (int i = 0; i < DEV_W; ++i) {
uint16_t control = controlData[i + j * DEV_H];
uint32_t test = readBuffer[i + j * DEV_H];
// Test alpha component
uint8_t ctrlComp = expand_value(control & 0xF, 4);
uint8_t testComp = GrColorUnpackA(test);
check_component(reporter, ctrlComp, testComp);
// Test blue component
ctrlComp = expand_value((control >> 4) & 0xF, 4);
testComp = GrColorUnpackB(test);
check_component(reporter, ctrlComp, testComp);
// Test green component
ctrlComp = expand_value((control >> 8) & 0xF, 4);
testComp = GrColorUnpackG(test);
check_component(reporter, ctrlComp, testComp);
// Test red component
ctrlComp = expand_value((control >> 12) & 0xF, 4);
testComp = GrColorUnpackR(test);
check_component(reporter, ctrlComp, testComp);
}
}
}
static void check_565(skiatest::Reporter* reporter,
const SkTDArray<uint16_t>& controlData,
const SkTDArray<GrColor>& readBuffer) {
for (int j = 0; j < DEV_H; ++j) {
for (int i = 0; i < DEV_W; ++i) {
uint16_t control = controlData[i + j * DEV_H];
GrColor test = readBuffer[i + j * DEV_H];
// Test blue component (5 bit control)
uint8_t ctrlComp = expand_value(control & 0x1F, 5);
uint8_t testComp = GrColorUnpackB(test);
check_component(reporter, ctrlComp, testComp);
// Test green component (6 bit control)
ctrlComp = expand_value((control >> 5) & 0x3F, 6);
testComp = GrColorUnpackG(test);
check_component(reporter, ctrlComp, testComp);
// Test red component (5 bit control)
ctrlComp = expand_value((control >> 11) & 0x1F, 5);
testComp = GrColorUnpackR(test);
check_component(reporter, ctrlComp, testComp);
}
}
}
static void run_test(skiatest::Reporter* reporter, GrContext* context, int arraySize,
SkColorType colorType) {
SkTDArray<uint16_t> controlPixelData;
// We will read back into an 8888 buffer since 565/4444 read backs aren't supported
SkTDArray<GrColor> readBuffer;
controlPixelData.setCount(arraySize);
readBuffer.setCount(arraySize);
for (int i = 0; i < arraySize; i += 2) {
controlPixelData[i] = 0xFF00;
controlPixelData[i + 1] = 0xFA62;
}
const SkImageInfo dstInfo =
SkImageInfo::Make(DEV_W, DEV_H, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
for (auto origin : { kTopLeft_GrSurfaceOrigin, kBottomLeft_GrSurfaceOrigin }) {
auto proxy = sk_gpu_test::MakeTextureProxyFromData(context, false, DEV_W, DEV_H,
SkColorTypeToGrColorType(colorType),
origin, controlPixelData.begin(), 0);
SkASSERT(proxy);
sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
std::move(proxy));
if (!sContext->readPixels(dstInfo, readBuffer.begin(), 0, 0, 0)) {
// We only require this to succeed if the format is renderable.
REPORTER_ASSERT(reporter, !context->colorTypeSupportedAsSurface(colorType));
return;
}
if (kARGB_4444_SkColorType == colorType) {
check_4444(reporter, controlPixelData, readBuffer);
} else {
SkASSERT(kRGB_565_SkColorType == colorType);
check_565(reporter, controlPixelData, readBuffer);
}
}
}
static const int CONTROL_ARRAY_SIZE = DEV_W * DEV_H;
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGBA4444TextureTest, reporter, ctxInfo) {
run_test(reporter, ctxInfo.grContext(), CONTROL_ARRAY_SIZE, kARGB_4444_SkColorType);
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RGB565TextureTest, reporter, ctxInfo) {
run_test(reporter, ctxInfo.grContext(), CONTROL_ARRAY_SIZE, kRGB_565_SkColorType);
}
#endif
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