2700abc4cb
This had poorly defined semantics in the world of DDL, and was only used for a handful of GMs and tests. Switch those to use the SkImage version. Bug: skia: Change-Id: I2bec65c7547b2c904bd7f57a6296aacc0f7b4ed2 Reviewed-on: https://skia-review.googlesource.com/153886 Reviewed-by: Robert Phillips <robertphillips@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
221 lines
8.9 KiB
C++
221 lines
8.9 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "Test.h"
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// This test is specific to the GPU backend.
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#include "GrContext.h"
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#include "GrContextPriv.h"
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#include "GrProxyProvider.h"
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#include "GrResourceProvider.h"
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#include "GrSurfaceContext.h"
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#include "GrSurfaceProxy.h"
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#include "GrTextureProxy.h"
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#include "ProxyUtils.h"
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#include "SkCanvas.h"
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#include "SkSurface.h"
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#include "SkTo.h"
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// This was made indivisible by 4 to ensure we test setting GL_PACK_ALIGNMENT properly.
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static const int X_SIZE = 13;
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static const int Y_SIZE = 13;
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static void validate_alpha_data(skiatest::Reporter* reporter, int w, int h, const uint8_t* actual,
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size_t actualRowBytes, const uint8_t* expected, SkString extraMsg,
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GrColorType colorType) {
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for (int y = 0; y < h; ++y) {
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for (int x = 0; x < w; ++x) {
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uint8_t a = actual[y * actualRowBytes + x];
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uint8_t e = expected[y * w + x];
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if (GrColorType::kRGBA_1010102 == colorType) {
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// This config only preserves two bits of alpha
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a >>= 6;
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e >>= 6;
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}
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if (e != a) {
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ERRORF(reporter,
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"Failed alpha readback. Expected: 0x%02x, Got: 0x%02x at (%d,%d), %s",
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e, a, x, y, extraMsg.c_str());
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return;
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}
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}
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}
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}
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ReadWriteAlpha, reporter, ctxInfo) {
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GrContext* context = ctxInfo.grContext();
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GrProxyProvider* proxyProvider = context->contextPriv().proxyProvider();
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unsigned char alphaData[X_SIZE * Y_SIZE];
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static const int kClearValue = 0x2;
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bool match;
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static const size_t kRowBytes[] = {0, X_SIZE, X_SIZE + 1, 2 * X_SIZE - 1};
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{
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GrSurfaceDesc desc;
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desc.fFlags = kNone_GrSurfaceFlags;
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desc.fConfig = kAlpha_8_GrPixelConfig; // it is a single channel texture
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desc.fWidth = X_SIZE;
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desc.fHeight = Y_SIZE;
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// We are initializing the texture with zeros here
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memset(alphaData, 0, X_SIZE * Y_SIZE);
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const SkImageInfo ii = SkImageInfo::MakeA8(X_SIZE, Y_SIZE);
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SkPixmap pixmap(ii, alphaData, ii.minRowBytes());
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sk_sp<SkImage> alphaImg = SkImage::MakeRasterCopy(pixmap);
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sk_sp<GrTextureProxy> proxy =
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proxyProvider->createTextureProxy(alphaImg, kNone_GrSurfaceFlags, 1,
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SkBudgeted::kNo, SkBackingFit::kExact);
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if (!proxy) {
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ERRORF(reporter, "Could not create alpha texture.");
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return;
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}
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sk_sp<GrSurfaceContext> sContext(context->contextPriv().makeWrappedSurfaceContext(
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std::move(proxy)));
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sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, ii));
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// create a distinctive texture
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for (int y = 0; y < Y_SIZE; ++y) {
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for (int x = 0; x < X_SIZE; ++x) {
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alphaData[y * X_SIZE + x] = y*X_SIZE+x;
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}
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}
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for (auto rowBytes : kRowBytes) {
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// upload the texture (do per-rowbytes iteration because we may overwrite below).
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bool result = sContext->writePixels(ii, alphaData, 0, 0, 0);
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REPORTER_ASSERT(reporter, result, "Initial A8 writePixels failed");
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size_t nonZeroRowBytes = rowBytes ? rowBytes : X_SIZE;
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size_t bufLen = nonZeroRowBytes * Y_SIZE;
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std::unique_ptr<uint8_t[]> readback(new uint8_t[bufLen]);
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// clear readback to something non-zero so we can detect readback failures
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memset(readback.get(), kClearValue, bufLen);
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// read the texture back
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result = sContext->readPixels(ii, readback.get(), rowBytes, 0, 0);
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// We don't require reading from kAlpha_8 to be supported. TODO: At least make this work
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// when kAlpha_8 is renderable.
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if (!result) {
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continue;
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}
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REPORTER_ASSERT(reporter, result, "Initial A8 readPixels failed");
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// make sure the original & read back versions match
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SkString msg;
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msg.printf("rb:%d A8", SkToU32(rowBytes));
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validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
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alphaData, msg, GrColorType::kAlpha_8);
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// Now try writing to a single channel surface (if we could create one).
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if (surf) {
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SkCanvas* canvas = surf->getCanvas();
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SkPaint paint;
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const SkRect rect = SkRect::MakeLTRB(-10, -10, X_SIZE + 10, Y_SIZE + 10);
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paint.setColor(SK_ColorWHITE);
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canvas->drawRect(rect, paint);
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// Workaround for a bug in old GCC/glibc used in our Chromecast toolchain:
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// error: call to '__warn_memset_zero_len' declared with attribute warning:
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// memset used with constant zero length parameter; this could be due
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// to transposed parameters
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// See also: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61294
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if (bufLen > 0) {
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memset(readback.get(), kClearValue, bufLen);
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}
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result = surf->readPixels(ii, readback.get(), nonZeroRowBytes, 0, 0);
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REPORTER_ASSERT(reporter, result, "A8 readPixels after clear failed");
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match = true;
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for (int y = 0; y < Y_SIZE && match; ++y) {
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for (int x = 0; x < X_SIZE && match; ++x) {
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uint8_t rbValue = readback.get()[y * nonZeroRowBytes + x];
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if (0xFF != rbValue) {
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ERRORF(reporter,
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"Failed alpha readback after clear. Expected: 0xFF, Got: 0x%02x"
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" at (%d,%d), rb:%d", rbValue, x, y, SkToU32(rowBytes));
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match = false;
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}
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}
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}
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}
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}
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}
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static constexpr struct {
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GrColorType fColorType;
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GrSRGBEncoded fSRGBEncoded;
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} kInfos[] = {
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{GrColorType::kRGBA_8888, GrSRGBEncoded::kNo},
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{GrColorType::kBGRA_8888, GrSRGBEncoded::kNo},
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{GrColorType::kRGBA_8888, GrSRGBEncoded::kYes},
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{GrColorType::kRGBA_1010102, GrSRGBEncoded::kNo},
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};
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for (int y = 0; y < Y_SIZE; ++y) {
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for (int x = 0; x < X_SIZE; ++x) {
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alphaData[y * X_SIZE + x] = y*X_SIZE+x;
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}
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}
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const SkImageInfo dstInfo = SkImageInfo::Make(X_SIZE, Y_SIZE,
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kAlpha_8_SkColorType,
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kPremul_SkAlphaType);
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// Attempt to read back just alpha from a RGBA/BGRA texture. Once with a texture-only src and
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// once with a render target.
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for (auto info : kInfos) {
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for (int rt = 0; rt < 2; ++rt) {
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uint32_t rgbaData[X_SIZE * Y_SIZE];
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// Make the alpha channel of the rgba texture come from alphaData.
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for (int y = 0; y < Y_SIZE; ++y) {
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for (int x = 0; x < X_SIZE; ++x) {
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rgbaData[y * X_SIZE + x] = GrColorPackRGBA(6, 7, 8, alphaData[y * X_SIZE + x]);
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}
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}
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auto origin = rt ? kBottomLeft_GrSurfaceOrigin : kTopLeft_GrSurfaceOrigin;
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auto proxy = sk_gpu_test::MakeTextureProxyFromData(context, rt, X_SIZE, Y_SIZE,
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info.fColorType, info.fSRGBEncoded,
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origin, rgbaData, 0);
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if (!proxy) {
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continue;
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}
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sk_sp<GrSurfaceContext> sContext = context->contextPriv().makeWrappedSurfaceContext(
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std::move(proxy));
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for (auto rowBytes : kRowBytes) {
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size_t nonZeroRowBytes = rowBytes ? rowBytes : X_SIZE;
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std::unique_ptr<uint8_t[]> readback(new uint8_t[nonZeroRowBytes * Y_SIZE]);
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// Clear so we don't accidentally see values from previous iteration.
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memset(readback.get(), kClearValue, nonZeroRowBytes * Y_SIZE);
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// read the texture back
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bool result = sContext->readPixels(dstInfo, readback.get(), rowBytes, 0, 0);
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REPORTER_ASSERT(reporter, result, "8888 readPixels failed");
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// make sure the original & read back versions match
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SkString msg;
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msg.printf("rt:%d, rb:%d 8888", rt, SkToU32(rowBytes));
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validate_alpha_data(reporter, X_SIZE, Y_SIZE, readback.get(), nonZeroRowBytes,
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alphaData, msg, info.fColorType);
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}
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}
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}
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}
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