skia2/tests/ReadWriteAlphaTest.cpp
Brian Osman 44b61204d9 Add 1010102 support to Ganesh
Adds gl1010102, gles1010102, vk1010102, and mtl1010102
configs to DM.

This uses the same saveLayer approach as CPU, switching
to 8888 so that we have enough alpha precision.

Change-Id: I9f5b63747ec01031c8db97dadfc42f77e4863ccb
Reviewed-on: https://skia-review.googlesource.com/110500
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2018-03-01 18:34:35 +00:00

217 lines
8.6 KiB
C++

/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "Test.h"
// This test is specific to the GPU backend.
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrContextPriv.h"
#include "GrProxyProvider.h"
#include "GrResourceProvider.h"
#include "GrSurfaceContext.h"
#include "GrSurfaceProxy.h"
#include "GrTextureProxy.h"
#include "SkCanvas.h"
#include "SkSurface.h"
// This was made indivisible by 4 to ensure we test setting GL_PACK_ALIGNMENT properly.
static const int X_SIZE = 13;
static const int Y_SIZE = 13;
static void validate_alpha_data(skiatest::Reporter* reporter, int w, int h, const uint8_t* actual,
size_t actualRowBytes, const uint8_t* expected, SkString extraMsg,
GrPixelConfig config) {
for (int y = 0; y < h; ++y) {
for (int x = 0; x < w; ++x) {
uint8_t a = actual[y * actualRowBytes + x];
uint8_t e = expected[y * w + x];
if (kRGBA_1010102_GrPixelConfig == config) {
// This config only preserves two bits of alpha
a >>= 6;
e >>= 6;
}
if (e != a) {
ERRORF(reporter,
"Failed alpha readback. Expected: 0x%02x, Got: 0x%02x at (%d,%d), %s",
e, a, x, y, extraMsg.c_str());
return;
}
}
}
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadWriteAlpha, reporter, ctxInfo) {
GrContext* context = ctxInfo.grContext();
GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
unsigned char alphaData[X_SIZE * Y_SIZE];
static const int kClearValue = 0x2;
bool match;
static const size_t kRowBytes[] = {0, X_SIZE, X_SIZE + 1, 2 * X_SIZE - 1};
{
GrSurfaceDesc desc;
desc.fFlags = kNone_GrSurfaceFlags;
desc.fOrigin = kTopLeft_GrSurfaceOrigin;
desc.fConfig = kAlpha_8_GrPixelConfig; // it is a single channel texture
desc.fWidth = X_SIZE;
desc.fHeight = Y_SIZE;
// We are initializing the texture with zeros here
memset(alphaData, 0, X_SIZE * Y_SIZE);
sk_sp<GrTextureProxy> proxy = proxyProvider->createTextureProxy(desc, SkBudgeted::kNo,
alphaData, 0);
if (!proxy) {
ERRORF(reporter, "Could not create alpha texture.");
return;
}
sk_sp<GrSurfaceContext> sContext(context->contextPriv().makeWrappedSurfaceContext(
std::move(proxy)));
const SkImageInfo ii = SkImageInfo::MakeA8(X_SIZE, Y_SIZE);
sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, ii));
// create a distinctive texture
for (int y = 0; y < Y_SIZE; ++y) {
for (int x = 0; x < X_SIZE; ++x) {
alphaData[y * X_SIZE + x] = y*X_SIZE+x;
}
}
for (auto rowBytes : kRowBytes) {
// upload the texture (do per-rowbytes iteration because we may overwrite below).
bool result = sContext->writePixels(ii, alphaData, 0, 0, 0);
REPORTER_ASSERT(reporter, result, "Initial A8 writePixels failed");
size_t nonZeroRowBytes = rowBytes ? rowBytes : X_SIZE;
std::unique_ptr<uint8_t[]> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
// clear readback to something non-zero so we can detect readback failures
memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);
// read the texture back
result = sContext->readPixels(ii, readback.get(), rowBytes, 0, 0);
REPORTER_ASSERT(reporter, result, "Initial A8 readPixels failed");
// make sure the original & read back versions match
SkString msg;
msg.printf("rb:%d A8", SkToU32(rowBytes));
validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
alphaData, msg, kAlpha_8_GrPixelConfig);
// Now try writing to a single channel surface (if we could create one).
if (surf) {
SkCanvas* canvas = surf->getCanvas();
SkPaint paint;
const SkRect rect = SkRect::MakeLTRB(-10, -10, X_SIZE + 10, Y_SIZE + 10);
paint.setColor(SK_ColorWHITE);
canvas->drawRect(rect, paint);
memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);
result = surf->readPixels(ii, readback.get(), nonZeroRowBytes, 0, 0);
REPORTER_ASSERT(reporter, result, "A8 readPixels after clear failed");
match = true;
for (int y = 0; y < Y_SIZE && match; ++y) {
for (int x = 0; x < X_SIZE && match; ++x) {
uint8_t rbValue = readback.get()[y * nonZeroRowBytes + x];
if (0xFF != rbValue) {
ERRORF(reporter,
"Failed alpha readback after clear. Expected: 0xFF, Got: 0x%02x"
" at (%d,%d), rb:%d", rbValue, x, y, SkToU32(rowBytes));
match = false;
}
}
}
}
}
}
static const GrPixelConfig kRGBAConfigs[] {
kRGBA_8888_GrPixelConfig,
kBGRA_8888_GrPixelConfig,
kSRGBA_8888_GrPixelConfig,
kRGBA_1010102_GrPixelConfig,
};
for (int y = 0; y < Y_SIZE; ++y) {
for (int x = 0; x < X_SIZE; ++x) {
alphaData[y * X_SIZE + x] = y*X_SIZE+x;
}
}
const SkImageInfo dstInfo = SkImageInfo::Make(X_SIZE, Y_SIZE,
kAlpha_8_SkColorType,
kPremul_SkAlphaType);
// Attempt to read back just alpha from a RGBA/BGRA texture. Once with a texture-only src and
// once with a render target.
for (auto config : kRGBAConfigs) {
for (int rt = 0; rt < 2; ++rt) {
GrSurfaceDesc desc;
desc.fFlags = rt ? kRenderTarget_GrSurfaceFlag : kNone_GrSurfaceFlags;
desc.fOrigin = rt ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
desc.fConfig = config;
desc.fWidth = X_SIZE;
desc.fHeight = Y_SIZE;
uint32_t rgbaData[X_SIZE * Y_SIZE];
// Make the alpha channel of the rgba texture come from alphaData.
for (int y = 0; y < Y_SIZE; ++y) {
for (int x = 0; x < X_SIZE; ++x) {
rgbaData[y * X_SIZE + x] = GrColorPackRGBA(6, 7, 8, alphaData[y * X_SIZE + x]);
}
}
sk_sp<GrTextureProxy> proxy = proxyProvider->createTextureProxy(desc, SkBudgeted::kNo,
rgbaData, 0);
if (!proxy) {
// We always expect to be able to create a RGBA texture
if (!rt && kRGBA_8888_GrPixelConfig == desc.fConfig) {
ERRORF(reporter, "Failed to create RGBA texture.");
}
continue;
}
sk_sp<SkColorSpace> colorSpace;
if (GrPixelConfigIsSRGB(proxy->config())) {
colorSpace = SkColorSpace::MakeSRGB();
}
sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
std::move(proxy), std::move(colorSpace));
for (auto rowBytes : kRowBytes) {
size_t nonZeroRowBytes = rowBytes ? rowBytes : X_SIZE;
std::unique_ptr<uint8_t[]> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
// Clear so we don't accidentally see values from previous iteration.
memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);
// read the texture back
bool result = sContext->readPixels(dstInfo, readback.get(), rowBytes, 0, 0);
REPORTER_ASSERT(reporter, result, "8888 readPixels failed");
// make sure the original & read back versions match
SkString msg;
msg.printf("rt:%d, rb:%d 8888", rt, SkToU32(rowBytes));
validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
alphaData, msg, config);
}
}
}
}
#endif