4bc0c1fc4b
Add version SkImageInfo::Make() that takes SkISize instead of separate width and height. Change-Id: I42aa79d23b19e22f5405631728c245b04bce0559 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/245172 Commit-Queue: Brian Salomon <bsalomon@google.com> Reviewed-by: Brian Osman <brianosman@google.com>
109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/*
|
|
* Copyright 2011 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/SkCanvas.h"
|
|
#include "include/core/SkSurface.h"
|
|
#include "tests/Test.h"
|
|
#include "tools/ToolUtils.h"
|
|
|
|
#include "include/gpu/GrContext.h"
|
|
|
|
static uint32_t pack_unpremul_rgba(SkColor c) {
|
|
uint32_t packed;
|
|
uint8_t* byte = reinterpret_cast<uint8_t*>(&packed);
|
|
byte[0] = SkColorGetR(c);
|
|
byte[1] = SkColorGetG(c);
|
|
byte[2] = SkColorGetB(c);
|
|
byte[3] = SkColorGetA(c);
|
|
return packed;
|
|
}
|
|
|
|
static uint32_t pack_unpremul_bgra(SkColor c) {
|
|
uint32_t packed;
|
|
uint8_t* byte = reinterpret_cast<uint8_t*>(&packed);
|
|
byte[0] = SkColorGetB(c);
|
|
byte[1] = SkColorGetG(c);
|
|
byte[2] = SkColorGetR(c);
|
|
byte[3] = SkColorGetA(c);
|
|
return packed;
|
|
}
|
|
|
|
typedef uint32_t (*PackUnpremulProc)(SkColor);
|
|
|
|
const struct {
|
|
SkColorType fColorType;
|
|
PackUnpremulProc fPackProc;
|
|
} gUnpremul[] = {
|
|
{ kRGBA_8888_SkColorType, pack_unpremul_rgba },
|
|
{ kBGRA_8888_SkColorType, pack_unpremul_bgra },
|
|
};
|
|
|
|
static void fill_surface(SkSurface* surf, SkColorType colorType, PackUnpremulProc proc) {
|
|
// Don't strictly need a bitmap, but its a handy way to allocate the pixels
|
|
SkBitmap bmp;
|
|
bmp.allocN32Pixels(256, 256);
|
|
|
|
for (int a = 0; a < 256; ++a) {
|
|
uint32_t* pixels = bmp.getAddr32(0, a);
|
|
for (int r = 0; r < 256; ++r) {
|
|
pixels[r] = proc(SkColorSetARGB(a, r, 0, 0));
|
|
}
|
|
}
|
|
|
|
const SkImageInfo info = SkImageInfo::Make(bmp.dimensions(), colorType, kUnpremul_SkAlphaType);
|
|
surf->writePixels({info, bmp.getPixels(), bmp.rowBytes()}, 0, 0);
|
|
}
|
|
|
|
static void test_premul_alpha_roundtrip(skiatest::Reporter* reporter, SkSurface* surf) {
|
|
for (size_t upmaIdx = 0; upmaIdx < SK_ARRAY_COUNT(gUnpremul); ++upmaIdx) {
|
|
fill_surface(surf, gUnpremul[upmaIdx].fColorType, gUnpremul[upmaIdx].fPackProc);
|
|
|
|
const SkImageInfo info = SkImageInfo::Make(256, 256, gUnpremul[upmaIdx].fColorType,
|
|
kUnpremul_SkAlphaType);
|
|
SkBitmap readBmp1;
|
|
readBmp1.allocPixels(info);
|
|
SkBitmap readBmp2;
|
|
readBmp2.allocPixels(info);
|
|
|
|
readBmp1.eraseColor(0);
|
|
readBmp2.eraseColor(0);
|
|
|
|
surf->readPixels(readBmp1, 0, 0);
|
|
surf->writePixels(readBmp1, 0, 0);
|
|
surf->readPixels(readBmp2, 0, 0);
|
|
|
|
bool success = true;
|
|
for (int y = 0; y < 256 && success; ++y) {
|
|
const uint32_t* pixels1 = readBmp1.getAddr32(0, y);
|
|
const uint32_t* pixels2 = readBmp2.getAddr32(0, y);
|
|
for (int x = 0; x < 256 && success; ++x) {
|
|
// We see sporadic failures here. May help to see where it goes wrong.
|
|
if (pixels1[x] != pixels2[x]) {
|
|
SkDebugf("%x != %x, x = %d, y = %d\n", pixels1[x], pixels2[x], x, y);
|
|
}
|
|
REPORTER_ASSERT(reporter, success = pixels1[x] == pixels2[x]);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
DEF_TEST(PremulAlphaRoundTrip, reporter) {
|
|
const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
|
|
|
|
sk_sp<SkSurface> surf(SkSurface::MakeRaster(info));
|
|
|
|
test_premul_alpha_roundtrip(reporter, surf.get());
|
|
}
|
|
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(PremulAlphaRoundTrip_Gpu, reporter, ctxInfo) {
|
|
const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
|
|
|
|
sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(ctxInfo.grContext(),
|
|
SkBudgeted::kNo,
|
|
info));
|
|
test_premul_alpha_roundtrip(reporter, surf.get());
|
|
}
|