blob: 8dde7976be818dac2a5df7fd27bcf95625feef09 [file] [log] [blame]
/*
* Copyright 2021 Google LLC
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "include/core/SkBitmap.h"
#include "include/core/SkBlendMode.h"
#include "include/core/SkBlender.h" // IWYU pragma: keep
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkPaint.h"
#include "include/core/SkRect.h"
#include "include/core/SkRefCnt.h"
#include "include/core/SkShader.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTypes.h"
#include "include/gpu/GpuTypes.h"
#include "include/gpu/GrDirectContext.h"
#include "tests/CtsEnforcement.h"
#include "tests/Test.h"
#include "tools/RuntimeBlendUtils.h"
#include <cmath>
#include <initializer_list>
#include <vector>
struct GrContextOptions;
static bool nearly_equal(const SkColor& x, const SkColor& y) {
const int kTolerance = 1;
return abs((int)SkColorGetA(x) - (int)SkColorGetA(y)) <= kTolerance &&
abs((int)SkColorGetR(x) - (int)SkColorGetR(y)) <= kTolerance &&
abs((int)SkColorGetG(x) - (int)SkColorGetG(y)) <= kTolerance &&
abs((int)SkColorGetB(x) - (int)SkColorGetB(y)) <= kTolerance;
}
static void test_blend(skiatest::Reporter* r, SkSurface* surface) {
SkBitmap bitmap;
REPORTER_ASSERT(r, bitmap.tryAllocPixels(surface->imageInfo()));
for (int m = 0; m < kSkBlendModeCount; ++m) {
SkBlendMode mode = (SkBlendMode)m;
for (int alpha : {0x80, 0xFF}) {
for (bool useShader : {false, true}) {
std::vector<SkColor> colors;
for (bool useRuntimeBlend : {false, true}) {
// Draw a solid red pixel.
SkPaint paint;
paint.setColor(SK_ColorRED);
paint.setBlendMode(SkBlendMode::kSrc);
surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint);
// Draw a blue pixel on top of it, using the passed-in blend mode.
if (useShader) {
// Install a different color in the paint, to ensure we're using the shader
paint.setColor(SK_ColorGREEN);
paint.setShader(SkShaders::Color(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF)));
} else {
paint.setColor(SkColorSetARGB(alpha, 0x00, 0x00, 0xFF));
}
if (useRuntimeBlend) {
paint.setBlender(GetRuntimeBlendForBlendMode(mode));
} else {
paint.setBlendMode(mode);
}
surface->getCanvas()->drawRect(SkRect::MakeWH(1, 1), paint);
// Read back the red/blue blended pixel.
REPORTER_ASSERT(r,
surface->readPixels(bitmap.info(),
bitmap.getPixels(),
bitmap.rowBytes(),
/*srcX=*/0,
/*srcY=*/0));
colors.push_back(bitmap.getColor(/*x=*/0, /*y=*/0));
}
REPORTER_ASSERT(r,
nearly_equal(colors[0], colors[1]),
"Expected: %s %s %s blend matches. Actual: Built-in "
"A=%02X R=%02X G=%02X B=%02X, Runtime A=%02X R=%02X G=%02X B=%02X",
SkBlendMode_Name(mode),
(alpha == 0xFF) ? "solid" : "transparent",
useShader ? "shader" : "paint",
SkColorGetA(colors[0]),
SkColorGetR(colors[0]),
SkColorGetG(colors[0]),
SkColorGetB(colors[0]),
SkColorGetA(colors[1]),
SkColorGetR(colors[1]),
SkColorGetG(colors[1]),
SkColorGetB(colors[1]));
}
}
}
}
DEF_TEST(SkRuntimeBlender_CPU, r) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
sk_sp<SkSurface> surface(SkSurface::MakeRaster(info));
test_blend(r, surface.get());
}
DEF_GANESH_TEST_FOR_RENDERING_CONTEXTS(SkRuntimeBlender_GPU,
r,
ctxInfo,
CtsEnforcement::kApiLevel_T) {
const SkImageInfo info = SkImageInfo::MakeN32Premul(/*width=*/1, /*height=*/1);
sk_sp<SkSurface> surface(
SkSurface::MakeRenderTarget(ctxInfo.directContext(), skgpu::Budgeted::kNo, info));
test_blend(r, surface.get());
}