50acf8f04b
Bug: skia:8937 Change-Id: I42f011e04937a751222bd8ecc6c69b45cf9626a2 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/206681 Reviewed-by: Brian Salomon <bsalomon@google.com> Reviewed-by: Florin Malita <fmalita@chromium.org> Commit-Queue: Mike Reed <reed@google.com>
98 lines
3.1 KiB
C++
98 lines
3.1 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 "SkBitmap.h"
|
|
#include "SkColorShader.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkShader.h"
|
|
#include "Test.h"
|
|
|
|
static void test_bitmap(skiatest::Reporter* reporter) {
|
|
SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2);
|
|
|
|
SkBitmap bmp;
|
|
bmp.setInfo(info);
|
|
|
|
// test 1: bitmap without pixel data
|
|
auto shader = bmp.makeShader(SkTileMode::kClamp, SkTileMode::kClamp);
|
|
REPORTER_ASSERT(reporter, shader);
|
|
REPORTER_ASSERT(reporter, !shader->isOpaque());
|
|
|
|
// From this point on, we have pixels
|
|
bmp.allocPixels(info);
|
|
|
|
// test 2: not opaque by default
|
|
shader = bmp.makeShader();
|
|
REPORTER_ASSERT(reporter, shader);
|
|
REPORTER_ASSERT(reporter, !shader->isOpaque());
|
|
|
|
// test 3: explicitly opaque
|
|
bmp.setAlphaType(kOpaque_SkAlphaType);
|
|
shader = bmp.makeShader();
|
|
REPORTER_ASSERT(reporter, shader);
|
|
REPORTER_ASSERT(reporter, shader->isOpaque());
|
|
|
|
// test 4: explicitly not opaque
|
|
bmp.setAlphaType(kPremul_SkAlphaType);
|
|
shader = bmp.makeShader();
|
|
REPORTER_ASSERT(reporter, shader);
|
|
REPORTER_ASSERT(reporter, !shader->isOpaque());
|
|
}
|
|
|
|
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;
|
|
SkTileMode mode = SkTileMode::kClamp;
|
|
|
|
// test 1: all opaque
|
|
colors[0] = SkColorSetARGB(0xFF, 0, 0, 0);
|
|
colors[1] = SkColorSetARGB(0xFF, 0, 0, 0);
|
|
auto grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode);
|
|
REPORTER_ASSERT(reporter, grad);
|
|
REPORTER_ASSERT(reporter, grad->isOpaque());
|
|
|
|
// test 2: all 0 alpha
|
|
colors[0] = SkColorSetARGB(0, 0, 0, 0);
|
|
colors[1] = SkColorSetARGB(0, 0, 0, 0);
|
|
grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode);
|
|
REPORTER_ASSERT(reporter, grad);
|
|
REPORTER_ASSERT(reporter, !grad->isOpaque());
|
|
|
|
// test 3: one opaque, one transparent
|
|
colors[0] = SkColorSetARGB(0xFF, 0, 0, 0);
|
|
colors[1] = SkColorSetARGB(0x40, 0, 0, 0);
|
|
grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode);
|
|
REPORTER_ASSERT(reporter, grad);
|
|
REPORTER_ASSERT(reporter, !grad->isOpaque());
|
|
|
|
// test 4: test 3, swapped
|
|
colors[0] = SkColorSetARGB(0x40, 0, 0, 0);
|
|
colors[1] = SkColorSetARGB(0xFF, 0, 0, 0);
|
|
grad = SkGradientShader::MakeLinear(pts, colors, pos, count, mode);
|
|
REPORTER_ASSERT(reporter, grad);
|
|
REPORTER_ASSERT(reporter, !grad->isOpaque());
|
|
}
|
|
|
|
static void test_color(skiatest::Reporter* reporter) {
|
|
SkColorShader colorShader1(SkColorSetARGB(0,0,0,0));
|
|
REPORTER_ASSERT(reporter, !colorShader1.isOpaque());
|
|
SkColorShader colorShader2(SkColorSetARGB(0xFF,0,0,0));
|
|
REPORTER_ASSERT(reporter, colorShader2.isOpaque());
|
|
SkColorShader colorShader3(SkColorSetARGB(0x7F,0,0,0));
|
|
REPORTER_ASSERT(reporter, !colorShader3.isOpaque());
|
|
}
|
|
|
|
DEF_TEST(ShaderOpacity, reporter) {
|
|
test_gradient(reporter);
|
|
test_color(reporter);
|
|
test_bitmap(reporter);
|
|
}
|