c7ad40f76f
Most of this is (obviously) not necessary to do, but once I started, I figured I'd just get it all. Tools (nanobench, DM, skiaserve), all GMs, benches, and unit tests, plus support code (command line parsing and config stuff). This is almost entirely mechanical. Bug: skia: Change-Id: I209500f8df8c5bd43f8298ff26440d1c4d7425fb Reviewed-on: https://skia-review.googlesource.com/131153 Reviewed-by: Mike Klein <mtklein@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com> Commit-Queue: Brian Osman <brianosman@google.com>
111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
/*
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* Copyright 2011 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 "SkCanvas.h"
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#include "SkSurface.h"
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#include "Test.h"
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#include "sk_tool_utils.h"
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#include "GrContext.h"
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static uint32_t pack_unpremul_rgba(SkColor c) {
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uint32_t packed;
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uint8_t* byte = reinterpret_cast<uint8_t*>(&packed);
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byte[0] = SkColorGetR(c);
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byte[1] = SkColorGetG(c);
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byte[2] = SkColorGetB(c);
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byte[3] = SkColorGetA(c);
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return packed;
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}
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static uint32_t pack_unpremul_bgra(SkColor c) {
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uint32_t packed;
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uint8_t* byte = reinterpret_cast<uint8_t*>(&packed);
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byte[0] = SkColorGetB(c);
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byte[1] = SkColorGetG(c);
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byte[2] = SkColorGetR(c);
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byte[3] = SkColorGetA(c);
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return packed;
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}
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typedef uint32_t (*PackUnpremulProc)(SkColor);
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const struct {
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SkColorType fColorType;
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PackUnpremulProc fPackProc;
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} gUnpremul[] = {
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{ kRGBA_8888_SkColorType, pack_unpremul_rgba },
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{ kBGRA_8888_SkColorType, pack_unpremul_bgra },
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};
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static void fill_surface(SkSurface* surf, SkColorType colorType, PackUnpremulProc proc) {
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// Don't strictly need a bitmap, but its a handy way to allocate the pixels
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SkBitmap bmp;
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bmp.allocN32Pixels(256, 256);
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for (int a = 0; a < 256; ++a) {
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uint32_t* pixels = bmp.getAddr32(0, a);
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for (int r = 0; r < 256; ++r) {
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pixels[r] = proc(SkColorSetARGB(a, r, 0, 0));
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}
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}
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const SkImageInfo info = SkImageInfo::Make(bmp.width(), bmp.height(),
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colorType, kUnpremul_SkAlphaType);
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surf->writePixels({info, bmp.getPixels(), bmp.rowBytes()}, 0, 0);
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}
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static void test_premul_alpha_roundtrip(skiatest::Reporter* reporter, SkSurface* surf) {
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for (size_t upmaIdx = 0; upmaIdx < SK_ARRAY_COUNT(gUnpremul); ++upmaIdx) {
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fill_surface(surf, gUnpremul[upmaIdx].fColorType, gUnpremul[upmaIdx].fPackProc);
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const SkImageInfo info = SkImageInfo::Make(256, 256, gUnpremul[upmaIdx].fColorType,
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kUnpremul_SkAlphaType);
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SkBitmap readBmp1;
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readBmp1.allocPixels(info);
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SkBitmap readBmp2;
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readBmp2.allocPixels(info);
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readBmp1.eraseColor(0);
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readBmp2.eraseColor(0);
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surf->readPixels(readBmp1, 0, 0);
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sk_tool_utils::write_pixels(surf, readBmp1, 0, 0, gUnpremul[upmaIdx].fColorType,
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kUnpremul_SkAlphaType);
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surf->readPixels(readBmp2, 0, 0);
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bool success = true;
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for (int y = 0; y < 256 && success; ++y) {
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const uint32_t* pixels1 = readBmp1.getAddr32(0, y);
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const uint32_t* pixels2 = readBmp2.getAddr32(0, y);
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for (int x = 0; x < 256 && success; ++x) {
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// We see sporadic failures here. May help to see where it goes wrong.
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if (pixels1[x] != pixels2[x]) {
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SkDebugf("%x != %x, x = %d, y = %d\n", pixels1[x], pixels2[x], x, y);
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}
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REPORTER_ASSERT(reporter, success = pixels1[x] == pixels2[x]);
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}
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}
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}
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}
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DEF_TEST(PremulAlphaRoundTrip, reporter) {
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const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
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sk_sp<SkSurface> surf(SkSurface::MakeRaster(info));
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test_premul_alpha_roundtrip(reporter, surf.get());
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}
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(PremulAlphaRoundTrip_Gpu, reporter, ctxInfo) {
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const SkImageInfo info = SkImageInfo::MakeN32Premul(256, 256);
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sk_sp<SkSurface> surf(SkSurface::MakeRenderTarget(ctxInfo.grContext(),
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SkBudgeted::kNo,
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info));
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test_premul_alpha_roundtrip(reporter, surf.get());
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}
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