| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "TestUtils.h" |
| |
| namespace android { |
| namespace uirenderer { |
| |
| SkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) { |
| int startA = (start >> 24) & 0xff; |
| int startR = (start >> 16) & 0xff; |
| int startG = (start >> 8) & 0xff; |
| int startB = start & 0xff; |
| |
| int endA = (end >> 24) & 0xff; |
| int endR = (end >> 16) & 0xff; |
| int endG = (end >> 8) & 0xff; |
| int endB = end & 0xff; |
| |
| return (int)((startA + (int)(fraction * (endA - startA))) << 24) |
| | (int)((startR + (int)(fraction * (endR - startR))) << 16) |
| | (int)((startG + (int)(fraction * (endG - startG))) << 8) |
| | (int)((startB + (int)(fraction * (endB - startB)))); |
| } |
| |
| void TestUtils::drawTextToCanvas(TestCanvas* canvas, const char* text, |
| const SkPaint& inPaint, float x, float y) { |
| // copy to force TextEncoding (which JNI layer would have done) |
| SkPaint paint(inPaint); |
| paint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| |
| SkMatrix identity; |
| identity.setIdentity(); |
| SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry); |
| SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &identity); |
| |
| float totalAdvance = 0; |
| std::vector<glyph_t> glyphs; |
| std::vector<float> positions; |
| Rect bounds; |
| while (*text != '\0') { |
| SkUnichar unichar = SkUTF8_NextUnichar(&text); |
| glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar); |
| autoCache.getCache()->unicharToGlyph(unichar); |
| |
| // push glyph and its relative position |
| glyphs.push_back(glyph); |
| positions.push_back(totalAdvance); |
| positions.push_back(0); |
| |
| // compute bounds |
| SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar); |
| Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight); |
| glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop); |
| bounds.unionWith(glyphBounds); |
| |
| // advance next character |
| SkScalar skWidth; |
| paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL); |
| totalAdvance += skWidth; |
| } |
| bounds.translate(x, y); |
| canvas->drawText(glyphs.data(), positions.data(), glyphs.size(), paint, x, y, |
| bounds.left, bounds.top, bounds.right, bounds.bottom, totalAdvance); |
| } |
| |
| } /* namespace uirenderer */ |
| } /* namespace android */ |