TestUtils.cpp revision d7448e65e243754f31890baef29dff187dc2e5e5
116c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck/* 216c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * Copyright (C) 2015 The Android Open Source Project 316c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * 416c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * Licensed under the Apache License, Version 2.0 (the "License"); 516c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * you may not use this file except in compliance with the License. 616c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * You may obtain a copy of the License at 716c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * 816c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * http://www.apache.org/licenses/LICENSE-2.0 916c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * 1016c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * Unless required by applicable law or agreed to in writing, software 1116c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * distributed under the License is distributed on an "AS IS" BASIS, 1216c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1316c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * See the License for the specific language governing permissions and 1416c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck * limitations under the License. 1516c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck */ 1616c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 1716c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck#include "TestUtils.h" 1816c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 1916c9d6a92e1b86d448c00c52a1630f3e71e6df76John Recknamespace android { 2016c9d6a92e1b86d448c00c52a1630f3e71e6df76John Recknamespace uirenderer { 2116c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 2216c9d6a92e1b86d448c00c52a1630f3e71e6df76John ReckSkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) { 2316c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int startA = (start >> 24) & 0xff; 2416c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int startR = (start >> 16) & 0xff; 2516c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int startG = (start >> 8) & 0xff; 2616c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int startB = start & 0xff; 2716c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 2816c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int endA = (end >> 24) & 0xff; 2916c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int endR = (end >> 16) & 0xff; 3016c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int endG = (end >> 8) & 0xff; 3116c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck int endB = end & 0xff; 3216c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 3316c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck return (int)((startA + (int)(fraction * (endA - startA))) << 24) 3416c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck | (int)((startR + (int)(fraction * (endR - startR))) << 16) 3516c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck | (int)((startG + (int)(fraction * (endG - startG))) << 8) 3616c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck | (int)((startB + (int)(fraction * (endB - startB)))); 3716c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck} 3816c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck 39a1717271caac5e8ea3808c331d4141ac01a42134Chris Craikvoid TestUtils::drawTextToCanvas(TestCanvas* canvas, const char* text, 4042a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik const SkPaint& paint, float x, float y) { 4142a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // drawing text requires GlyphID TextEncoding (which JNI layer would have done) 4242a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding, 4342a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik "must use glyph encoding"); 4442a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry); 45d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I()); 46a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik 4742a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik float totalAdvance = 0; 4842a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik std::vector<glyph_t> glyphs; 4942a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik std::vector<float> positions; 5042a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik Rect bounds; 5142a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik while (*text != '\0') { 5242a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik SkUnichar unichar = SkUTF8_NextUnichar(&text); 5342a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar); 5442a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik autoCache.getCache()->unicharToGlyph(unichar); 55a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik 5642a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // push glyph and its relative position 5742a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik glyphs.push_back(glyph); 5842a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik positions.push_back(totalAdvance); 5942a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik positions.push_back(0); 60a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik 6142a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // compute bounds 6242a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar); 6342a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight); 6442a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop); 6542a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik bounds.unionWith(glyphBounds); 66a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik 6742a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // advance next character 6842a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik SkScalar skWidth; 6942a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL); 7042a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik totalAdvance += skWidth; 7142a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik } 7242a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik 7342a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // apply alignment via x parameter (which JNI layer would have done) 7442a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik if (paint.getTextAlign() == SkPaint::kCenter_Align) { 7542a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik x -= totalAdvance / 2; 7642a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik } else if (paint.getTextAlign() == SkPaint::kRight_Align) { 7742a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik x -= totalAdvance; 7842a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik } 7942a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik 8042a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik bounds.translate(x, y); 8142a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik 8242a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik // Force left alignment, since alignment offset is already baked in 8342a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik SkPaint alignPaintCopy(paint); 8442a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik alignPaintCopy.setTextAlign(SkPaint::kLeft_Align); 8542a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik canvas->drawText(glyphs.data(), positions.data(), glyphs.size(), alignPaintCopy, x, y, 8642a5407f2c6403ea7aa7a64eaf19948dc4050df5Chris Craik bounds.left, bounds.top, bounds.right, bounds.bottom, totalAdvance); 87a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik} 88a1717271caac5e8ea3808c331d4141ac01a42134Chris Craik 89d7448e65e243754f31890baef29dff187dc2e5e5Chris Craikvoid TestUtils::drawTextToCanvas(TestCanvas* canvas, const char* text, 90d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik const SkPaint& paint, const SkPath& path) { 91d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik // drawing text requires GlyphID TextEncoding (which JNI layer would have done) 92d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding, 93d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik "must use glyph encoding"); 94d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry); 95d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I()); 96d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik 97d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik std::vector<glyph_t> glyphs; 98d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik while (*text != '\0') { 99d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik SkUnichar unichar = SkUTF8_NextUnichar(&text); 100d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik glyphs.push_back(autoCache.getCache()->unicharToGlyph(unichar)); 101d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik } 102d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik canvas->drawTextOnPath(glyphs.data(), glyphs.size(), path, 0, 0, paint); 103d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik} 104d7448e65e243754f31890baef29dff187dc2e5e5Chris Craik 10516c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck} /* namespace uirenderer */ 10616c9d6a92e1b86d448c00c52a1630f3e71e6df76John Reck} /* namespace android */ 107