TestUtils.cpp revision dccca44ffda4836b56a21da95a046c9708ffd49c 
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 "DeferredLayerUpdater.h"
20#include "LayerRenderer.h"
21
22namespace android {
23namespace uirenderer {
24
25SkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) {
26    int startA = (start >> 24) & 0xff;
27    int startR = (start >> 16) & 0xff;
28    int startG = (start >> 8) & 0xff;
29    int startB = start & 0xff;
30
31    int endA = (end >> 24) & 0xff;
32    int endR = (end >> 16) & 0xff;
33    int endG = (end >> 8) & 0xff;
34    int endB = end & 0xff;
35
36    return (int)((startA + (int)(fraction * (endA - startA))) << 24)
37            | (int)((startR + (int)(fraction * (endR - startR))) << 16)
38            | (int)((startG + (int)(fraction * (endG - startG))) << 8)
39            | (int)((startB + (int)(fraction * (endB - startB))));
40}
41
42sp<DeferredLayerUpdater> TestUtils::createTextureLayerUpdater(
43        renderthread::RenderThread& renderThread, uint32_t width, uint32_t height,
44        std::function<void(Matrix4*)> transformSetupCallback) {
45    bool isOpaque = true;
46    bool forceFilter = true;
47    GLenum renderTarget = GL_TEXTURE_EXTERNAL_OES;
48
49    Layer* layer = LayerRenderer::createTextureLayer(renderThread.renderState());
50    LayerRenderer::updateTextureLayer(layer, width, height, isOpaque, forceFilter,
51            renderTarget, Matrix4::identity().data);
52    transformSetupCallback(&(layer->getTransform()));
53
54    sp<DeferredLayerUpdater> layerUpdater = new DeferredLayerUpdater(layer);
55    return layerUpdater;
56}
57
58void TestUtils::layoutTextUnscaled(const SkPaint& paint, const char* text,
59        std::vector<glyph_t>* outGlyphs, std::vector<float>* outPositions,
60        float* outTotalAdvance, Rect* outBounds) {
61    Rect bounds;
62    float totalAdvance = 0;
63    SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry);
64    SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I());
65    while (*text != '\0') {
66        SkUnichar unichar = SkUTF8_NextUnichar(&text);
67        glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar);
68        autoCache.getCache()->unicharToGlyph(unichar);
69
70        // push glyph and its relative position
71        outGlyphs->push_back(glyph);
72        outPositions->push_back(totalAdvance);
73        outPositions->push_back(0);
74
75        // compute bounds
76        SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar);
77        Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight);
78        glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop);
79        bounds.unionWith(glyphBounds);
80
81        // advance next character
82        SkScalar skWidth;
83        paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL);
84        totalAdvance += skWidth;
85    }
86    *outBounds = bounds;
87    *outTotalAdvance = totalAdvance;
88}
89
90void TestUtils::drawUtf8ToCanvas(TestCanvas* canvas, const char* text,
91        const SkPaint& paint, float x, float y) {
92    // drawing text requires GlyphID TextEncoding (which JNI layer would have done)
93    LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding,
94            "must use glyph encoding");
95    SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry);
96    SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I());
97
98    std::vector<glyph_t> glyphs;
99    std::vector<float> positions;
100    float totalAdvance;
101    Rect bounds;
102    layoutTextUnscaled(paint, text, &glyphs, &positions, &totalAdvance, &bounds);
103
104    // apply alignment via x parameter (which JNI layer would have done)
105    if (paint.getTextAlign() == SkPaint::kCenter_Align) {
106        x -= totalAdvance / 2;
107    } else if (paint.getTextAlign() == SkPaint::kRight_Align) {
108        x -= totalAdvance;
109    }
110
111    bounds.translate(x, y);
112
113    // Force left alignment, since alignment offset is already baked in
114    SkPaint alignPaintCopy(paint);
115    alignPaintCopy.setTextAlign(SkPaint::kLeft_Align);
116    canvas->drawGlyphs(glyphs.data(), positions.data(), glyphs.size(), alignPaintCopy, x, y,
117                bounds.left, bounds.top, bounds.right, bounds.bottom, totalAdvance);
118}
119
120void TestUtils::drawUtf8ToCanvas(TestCanvas* canvas, const char* text,
121        const SkPaint& paint, const SkPath& path) {
122    // drawing text requires GlyphID TextEncoding (which JNI layer would have done)
123    LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding,
124            "must use glyph encoding");
125    SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry);
126    SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I());
127
128    std::vector<glyph_t> glyphs;
129    while (*text != '\0') {
130        SkUnichar unichar = SkUTF8_NextUnichar(&text);
131        glyphs.push_back(autoCache.getCache()->unicharToGlyph(unichar));
132    }
133    canvas->drawGlyphsOnPath(glyphs.data(), glyphs.size(), path, 0, 0, paint);
134}
135
136void TestUtils::TestTask::run() {
137    // RenderState only valid once RenderThread is running, so queried here
138    RenderState& renderState = renderthread::RenderThread::getInstance().renderState();
139
140    renderState.onGLContextCreated();
141    rtCallback(renderthread::RenderThread::getInstance());
142    renderState.flush(Caches::FlushMode::Full);
143    renderState.onGLContextDestroyed();
144}
145
146std::unique_ptr<uint16_t[]> TestUtils::utf8ToUtf16(const char* str) {
147    const size_t strLen = strlen(str);
148    const ssize_t utf16Len = utf8_to_utf16_length((uint8_t*) str, strLen);
149    std::unique_ptr<uint16_t[]> dst(new uint16_t[utf16Len + 1]);
150    utf8_to_utf16((uint8_t*) str, strLen, (char16_t*) dst.get());
151    return dst;
152}
153
154} /* namespace uirenderer */
155} /* namespace android */
156