static void test_gradient(skiatest::Reporter* reporter)
{
SkPoint pts[2];
pts[0].iset(0, 0);
pts[1].iset(1, 0);
SkColor colors[2];
SkScalar pos[2] = {SkIntToScalar(0), SkIntToScalar(1)};
int count = 2;
SkShader::TileMode mode = SkShader::kClamp_TileMode;
// test 1: all opaque
colors[0] = SkColorSetARGB(0xFF, 0, 0, 0);
colors[1] = SkColorSetARGB(0xFF, 0, 0, 0);
SkShader* grad = SkGradientShader::CreateLinear(pts, colors, pos, count,
mode);
REPORTER_ASSERT(reporter, grad);
REPORTER_ASSERT(reporter, grad->isOpaque());
grad->unref();
// test 2: all 0 alpha
colors[0] = SkColorSetARGB(0, 0, 0, 0);
colors[1] = SkColorSetARGB(0, 0, 0, 0);
grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode);
REPORTER_ASSERT(reporter, grad);
REPORTER_ASSERT(reporter, !grad->isOpaque());
grad->unref();
// test 3: one opaque, one transparent
colors[0] = SkColorSetARGB(0xFF, 0, 0, 0);
colors[1] = SkColorSetARGB(0x40, 0, 0, 0);
grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode);
REPORTER_ASSERT(reporter, grad);
REPORTER_ASSERT(reporter, !grad->isOpaque());
grad->unref();
// test 4: test 3, swapped
colors[0] = SkColorSetARGB(0x40, 0, 0, 0);
colors[1] = SkColorSetARGB(0xFF, 0, 0, 0);
grad = SkGradientShader::CreateLinear(pts, colors, pos, count, mode);
REPORTER_ASSERT(reporter, grad);
REPORTER_ASSERT(reporter, !grad->isOpaque());
grad->unref();
}
static void test_bitmap(skiatest::Reporter* reporter) {
SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2);
SkBitmap bmp;
bmp.setConfig(info);
// test 1: bitmap without pixel data
SkShader* shader = SkShader::CreateBitmapShader(bmp,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
REPORTER_ASSERT(reporter, shader);
REPORTER_ASSERT(reporter, !shader->isOpaque());
shader->unref();
// From this point on, we have pixels
bmp.allocPixels(info);
// test 2: not opaque by default
shader = SkShader::CreateBitmapShader(bmp,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
REPORTER_ASSERT(reporter, shader);
REPORTER_ASSERT(reporter, !shader->isOpaque());
shader->unref();
// test 3: explicitly opaque
bmp.setAlphaType(kOpaque_SkAlphaType);
shader = SkShader::CreateBitmapShader(bmp,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
REPORTER_ASSERT(reporter, shader);
REPORTER_ASSERT(reporter, shader->isOpaque());
shader->unref();
// test 4: explicitly not opaque
bmp.setAlphaType(kPremul_SkAlphaType);
shader = SkShader::CreateBitmapShader(bmp,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
REPORTER_ASSERT(reporter, shader);
REPORTER_ASSERT(reporter, !shader->isOpaque());
shader->unref();
}
// Returns true if all pixels painted will be opaque.
static inline bool paintIsOpaque(const SkPaint& paint, const SkBitmap* bitmap = 0, bool checkFillOnly = false)
{
if (paint.getAlpha() < 0xFF)
return false;
if (!checkFillOnly && paint.getStyle() != SkPaint::kFill_Style && paint.isAntiAlias())
return false;
SkShader* shader = paint.getShader();
if (shader && !shader->isOpaque())
return false;
if (bitmap && !bitmap->isOpaque())
return false;
if (paint.getLooper())
return false;
if (paint.getImageFilter())
return false;
if (paint.getMaskFilter())
return false;
SkColorFilter* colorFilter = paint.getColorFilter();
if (colorFilter && !(colorFilter->getFlags() & SkColorFilter::kAlphaUnchanged_Flag))
return false;
return true;
}
SkBlitter* SkRasterPipelineBlitter::Create(const SkPixmap& dst,
const SkPaint& paint,
const SkMatrix& ctm,
SkArenaAlloc* alloc) {
auto blitter = alloc->make<SkRasterPipelineBlitter>(
dst,
paint.getBlendMode(),
SkPM4f_from_SkColor(paint.getColor(), dst.colorSpace()));
SkBlendMode* blend = &blitter->fBlend;
SkPM4f* paintColor = &blitter->fPaintColor;
SkRasterPipeline* pipeline = &blitter->fShader;
SkShader* shader = paint.getShader();
SkColorFilter* colorFilter = paint.getColorFilter();
// TODO: all temporary
if (!supported(dst.info()) || !SkBlendMode_AppendStages(*blend)) {
return nullptr;
}
bool is_opaque = paintColor->a() == 1.0f,
is_constant = true;
if (shader) {
pipeline->append(SkRasterPipeline::seed_shader, &blitter->fCurrentY);
if (!shader->appendStages(pipeline, dst.colorSpace(), alloc, ctm, paint)) {
return nullptr;
}
if (!is_opaque) {
pipeline->append(SkRasterPipeline::scale_1_float,
&paintColor->fVec[SkPM4f::A]);
}
is_opaque = is_opaque && shader->isOpaque();
is_constant = shader->isConstant();
} else {
pipeline->append(SkRasterPipeline::constant_color, paintColor);
}
if (colorFilter) {
if (!colorFilter->appendStages(pipeline, dst.colorSpace(), alloc, is_opaque)) {
return nullptr;
}
is_opaque = is_opaque && (colorFilter->getFlags() & SkColorFilter::kAlphaUnchanged_Flag);
}
if (is_constant) {
pipeline->append(SkRasterPipeline::store_f32, &paintColor);
pipeline->run(0,1);
*pipeline = SkRasterPipeline();
pipeline->append(SkRasterPipeline::constant_color, paintColor);
is_opaque = paintColor->a() == 1.0f;
}
if (is_opaque && *blend == SkBlendMode::kSrcOver) {
*blend = SkBlendMode::kSrc;
}
if (is_constant && *blend == SkBlendMode::kSrc) {
SkRasterPipeline p;
p.extend(*pipeline);
blitter->fDstPtr = &blitter->fMemsetColor;
blitter->append_store(&p);
p.run(0,1);
blitter->fCanMemsetInBlitH = true;
}
return blitter;
}
