FontRendererTests.cpp revision 98c78dad1969e2321cfee2085faa55d95bba7e29 
1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include <gtest/gtest.h>
18
19#include "GammaFontRenderer.h"
20#include "tests/common/TestUtils.h"
21
22using namespace android::uirenderer;
23
24static bool isZero(uint8_t* data, int size) {
25    for (int i = 0; i < size; i++) {
26        if (data[i]) return false;
27    }
28    return true;
29}
30
31RENDERTHREAD_OPENGL_PIPELINE_TEST(FontRenderer, renderDropShadow) {
32    SkPaint paint;
33    paint.setTextSize(10);
34    paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
35    GammaFontRenderer gammaFontRenderer;
36    FontRenderer& fontRenderer = gammaFontRenderer.getFontRenderer();
37    fontRenderer.setFont(&paint, SkMatrix::I());
38
39    std::vector<glyph_t> glyphs;
40    std::vector<float> positions;
41    float totalAdvance;
42    Rect bounds;
43    TestUtils::layoutTextUnscaled(paint, "This is a test",
44            &glyphs, &positions, &totalAdvance, &bounds);
45
46    for (int radius : {28, 20, 2}) {
47        auto result = fontRenderer.renderDropShadow(&paint, glyphs.data(), glyphs.size(),
48                radius, positions.data());
49        ASSERT_NE(nullptr, result.image);
50        EXPECT_FALSE(isZero(result.image, result.width * result.height));
51        EXPECT_LE(bounds.getWidth() + radius * 2, (int) result.width);
52        EXPECT_LE(bounds.getHeight() + radius * 2, (int) result.height);
53        delete result.image;
54    }
55}
56