90 lines
3.7 KiB
C++
90 lines
3.7 KiB
C++
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/*
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* Copyright 2021 Google LLC
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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 "gm/gm.h"
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#include "include/core/SkBitmap.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkSurface.h"
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#include "include/effects/SkRuntimeEffect.h"
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#include "src/gpu/GrCaps.h"
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#include "src/gpu/GrDirectContextPriv.h"
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#include "tests/Test.h"
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#include "tools/Resources.h"
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#include "tools/RuntimeBlendUtils.h"
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#include "tools/ToolUtils.h"
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static bool nearly_equal(const SkColor& x, const SkColor& y) {
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const int kTolerance = 1;
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return abs((int)SkColorGetA(x) - (int)SkColorGetA(y)) <= kTolerance &&
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abs((int)SkColorGetR(x) - (int)SkColorGetR(y)) <= kTolerance &&
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abs((int)SkColorGetG(x) - (int)SkColorGetG(y)) <= kTolerance &&
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abs((int)SkColorGetB(x) - (int)SkColorGetB(y)) <= kTolerance;
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}
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static void test_blend(skiatest::Reporter* r, SkSurface* surface) {
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SkBitmap bitmap;
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REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo()));
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for (int m = 0; m <= (int)SkBlendMode::kLastMode; ++m) {
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SkBlendMode mode = (SkBlendMode)m;
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for (int alpha : {0x80, 0xFF}) {
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std::vector<SkColor> colors;
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for (bool useRuntimeBlend : {false, true}) {
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// Draw a solid red pixel.
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SkPaint paint;
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paint.setColor(SK_ColorRED);
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paint.setBlendMode(SkBlendMode::kSrc);
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surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint);
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// Draw a blue pixel on top of it, using the passed-in blend mode.
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paint.setColor(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF));
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if (useRuntimeBlend) {
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paint.setBlender(GetRuntimeBlendForBlendMode(mode));
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} else {
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paint.setBlendMode(mode);
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}
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surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint);
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// Read back the red/blue blended pixel.
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REPORTER_ASSERT(r, surface->readPixels(bitmap.info(), bitmap.getPixels(),
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bitmap.rowBytes(), /*srcX=*/0, /*srcY=*/0));
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colors.push_back(bitmap.getColor(/*x=*/0, /*y=*/0));
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}
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REPORTER_ASSERT(r, nearly_equal(colors[0], colors[1]),
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"Expected: %s %s blend matches. Actual: Built-in "
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"A=%02X R=%02X G=%02X B=%02X, Runtime A=%02X R=%02X G=%02X B=%02X",
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SkBlendMode_Name(mode),
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(alpha == 0xFF) ? "solid" : "transparent",
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SkColorGetA(colors[0]),
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SkColorGetR(colors[0]),
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SkColorGetG(colors[0]),
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SkColorGetB(colors[0]),
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SkColorGetA(colors[1]),
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SkColorGetR(colors[1]),
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SkColorGetG(colors[1]),
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SkColorGetB(colors[1]));
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}
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}
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}
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DEF_TEST(SkRuntimeBlender_CPU, r) {
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const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
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sk_sp<SkSurface> surface(SkSurface::MakeRaster(info));
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test_blend(r, surface.get());
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}
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SkRuntimeBlender_GPU, r, ctxInfo) {
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const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
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sk_sp<SkSurface> surface(SkSurface::MakeRenderTarget(ctxInfo.directContext(),
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SkBudgeted::kNo, info));
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test_blend(r, surface.get());
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}
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