TestUtils.cpp revision cab9d4e19922af417cd426e02cdb8f2237dd6903 
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
23#include <utils/Unicode.h>
24
25namespace android {
26namespace uirenderer {
27
28SkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) {
29    int startA = (start >> 24) & 0xff;
30    int startR = (start >> 16) & 0xff;
31    int startG = (start >> 8) & 0xff;
32    int startB = start & 0xff;
33
34    int endA = (end >> 24) & 0xff;
35    int endR = (end >> 16) & 0xff;
36    int endG = (end >> 8) & 0xff;
37    int endB = end & 0xff;
38
39    return (int)((startA + (int)(fraction * (endA - startA))) << 24)
40            | (int)((startR + (int)(fraction * (endR - startR))) << 16)
41            | (int)((startG + (int)(fraction * (endG - startG))) << 8)
42            | (int)((startB + (int)(fraction * (endB - startB))));
43}
44
45sp<DeferredLayerUpdater> TestUtils::createTextureLayerUpdater(
46        renderthread::RenderThread& renderThread, uint32_t width, uint32_t height,
47        std::function<void(Matrix4*)> transformSetupCallback) {
48    bool isOpaque = true;
49    bool forceFilter = true;
50    GLenum renderTarget = GL_TEXTURE_EXTERNAL_OES;
51
52    Layer* layer = LayerRenderer::createTextureLayer(renderThread.renderState());
53    LayerRenderer::updateTextureLayer(layer, width, height, isOpaque, forceFilter,
54            renderTarget, Matrix4::identity().data);
55    transformSetupCallback(&(layer->getTransform()));
56
57    sp<DeferredLayerUpdater> layerUpdater = new DeferredLayerUpdater(layer);
58    return layerUpdater;
59}
60
61void TestUtils::layoutTextUnscaled(const SkPaint& paint, const char* text,
62        std::vector<glyph_t>* outGlyphs, std::vector<float>* outPositions,
63        float* outTotalAdvance, Rect* outBounds) {
64    Rect bounds;
65    float totalAdvance = 0;
66    SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry);
67    SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I());
68    while (*text != '\0') {
69        size_t nextIndex = 0;
70        int32_t unichar = utf32_from_utf8_at(text, 4, 0, &nextIndex);
71        text += nextIndex;
72
73        glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar);
74        autoCache.getCache()->unicharToGlyph(unichar);
75
76        // push glyph and its relative position
77        outGlyphs->push_back(glyph);
78        outPositions->push_back(totalAdvance);
79        outPositions->push_back(0);
80
81        // compute bounds
82        SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar);
83        Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight);
84        glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop);
85        bounds.unionWith(glyphBounds);
86
87        // advance next character
88        SkScalar skWidth;
89        paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL);
90        totalAdvance += skWidth;
91    }
92    *outBounds = bounds;
93    *outTotalAdvance = totalAdvance;
94}
95
96
97void TestUtils::drawUtf8ToCanvas(Canvas* canvas, const char* text,
98        const SkPaint& paint, float x, float y) {
99    auto utf16 = asciiToUtf16(text);
100    canvas->drawText(utf16.get(), 0, strlen(text), strlen(text), x, y, 0, paint, nullptr);
101}
102
103void TestUtils::drawUtf8ToCanvas(Canvas* canvas, const char* text,
104        const SkPaint& paint, const SkPath& path) {
105    auto utf16 = asciiToUtf16(text);
106    canvas->drawTextOnPath(utf16.get(), strlen(text), 0, path, 0, 0, paint, nullptr);
107}
108
109void TestUtils::TestTask::run() {
110    // RenderState only valid once RenderThread is running, so queried here
111    RenderState& renderState = renderthread::RenderThread::getInstance().renderState();
112
113    renderState.onGLContextCreated();
114    rtCallback(renderthread::RenderThread::getInstance());
115    renderState.flush(Caches::FlushMode::Full);
116    renderState.onGLContextDestroyed();
117}
118
119std::unique_ptr<uint16_t[]> TestUtils::asciiToUtf16(const char* str) {
120    const int length = strlen(str);
121    std::unique_ptr<uint16_t[]> utf16(new uint16_t[length]);
122    for (int i = 0; i < length; i++) {
123        utf16.get()[i] = str[i];
124    }
125    return utf16;
126}
127
128} /* namespace uirenderer */
129} /* namespace android */
130