TestUtils.cpp revision aafb01d8ade0def3f51b74ae3bbc610c4ab33044 
1/*
2 * Copyright (C) 2015 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 "TestUtils.h"
18
19#include "hwui/Paint.h"
20#include "DeferredLayerUpdater.h"
21#include "LayerRenderer.h"
22
23namespace android {
24namespace uirenderer {
25
26SkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) {
27    int startA = (start >> 24) & 0xff;
28    int startR = (start >> 16) & 0xff;
29    int startG = (start >> 8) & 0xff;
30    int startB = start & 0xff;
31
32    int endA = (end >> 24) & 0xff;
33    int endR = (end >> 16) & 0xff;
34    int endG = (end >> 8) & 0xff;
35    int endB = end & 0xff;
36
37    return (int)((startA + (int)(fraction * (endA - startA))) << 24)
38            | (int)((startR + (int)(fraction * (endR - startR))) << 16)
39            | (int)((startG + (int)(fraction * (endG - startG))) << 8)
40            | (int)((startB + (int)(fraction * (endB - startB))));
41}
42
43sp<DeferredLayerUpdater> TestUtils::createTextureLayerUpdater(
44        renderthread::RenderThread& renderThread, uint32_t width, uint32_t height,
45        const SkMatrix& transform) {
46    Layer* layer = LayerRenderer::createTextureLayer(renderThread.renderState());
47    layer->getTransform().load(transform);
48
49    sp<DeferredLayerUpdater> layerUpdater = new DeferredLayerUpdater(layer);
50    layerUpdater->setSize(width, height);
51    layerUpdater->setTransform(&transform);
52
53    // updateLayer so it's ready to draw
54    bool isOpaque = true;
55    bool forceFilter = true;
56    GLenum renderTarget = GL_TEXTURE_EXTERNAL_OES;
57    LayerRenderer::updateTextureLayer(layer, width, height, isOpaque, forceFilter,
58    renderTarget, Matrix4::identity().data);
59
60    return layerUpdater;
61}
62
63void TestUtils::layoutTextUnscaled(const SkPaint& paint, const char* text,
64        std::vector<glyph_t>* outGlyphs, std::vector<float>* outPositions,
65        float* outTotalAdvance, Rect* outBounds) {
66    Rect bounds;
67    float totalAdvance = 0;
68    SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry);
69    SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I());
70    while (*text != '\0') {
71        SkUnichar unichar = SkUTF8_NextUnichar(&text);
72        glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar);
73        autoCache.getCache()->unicharToGlyph(unichar);
74
75        // push glyph and its relative position
76        outGlyphs->push_back(glyph);
77        outPositions->push_back(totalAdvance);
78        outPositions->push_back(0);
79
80        // compute bounds
81        SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar);
82        Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight);
83        glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop);
84        bounds.unionWith(glyphBounds);
85
86        // advance next character
87        SkScalar skWidth;
88        paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL);
89        totalAdvance += skWidth;
90    }
91    *outBounds = bounds;
92    *outTotalAdvance = totalAdvance;
93}
94
95
96void TestUtils::drawUtf8ToCanvas(Canvas* canvas, const char* text,
97        const SkPaint& paint, float x, float y) {
98    auto utf16 = asciiToUtf16(text);
99    canvas->drawText(utf16.get(), 0, strlen(text), strlen(text), x, y, 0, paint, nullptr);
100}
101
102void TestUtils::drawUtf8ToCanvas(Canvas* canvas, const char* text,
103        const SkPaint& paint, const SkPath& path) {
104    auto utf16 = asciiToUtf16(text);
105    canvas->drawTextOnPath(utf16.get(), strlen(text), 0, path, 0, 0, paint, nullptr);
106}
107
108void TestUtils::TestTask::run() {
109    // RenderState only valid once RenderThread is running, so queried here
110    RenderState& renderState = renderthread::RenderThread::getInstance().renderState();
111
112    renderState.onGLContextCreated();
113    rtCallback(renderthread::RenderThread::getInstance());
114    renderState.flush(Caches::FlushMode::Full);
115    renderState.onGLContextDestroyed();
116}
117
118std::unique_ptr<uint16_t[]> TestUtils::asciiToUtf16(const char* str) {
119    const int length = strlen(str);
120    std::unique_ptr<uint16_t[]> utf16(new uint16_t[length]);
121    for (int i = 0; i < length; i++) {
122        utf16.get()[i] = str[i];
123    }
124    return utf16;
125}
126
127} /* namespace uirenderer */
128} /* namespace android */
129