John Reck | 16c9d6a | 2015-11-17 15:51:08 -0800 | [diff] [blame] | 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 | namespace android { |
| 20 | namespace uirenderer { |
| 21 | |
| 22 | SkColor TestUtils::interpolateColor(float fraction, SkColor start, SkColor end) { |
| 23 | int startA = (start >> 24) & 0xff; |
| 24 | int startR = (start >> 16) & 0xff; |
| 25 | int startG = (start >> 8) & 0xff; |
| 26 | int startB = start & 0xff; |
| 27 | |
| 28 | int endA = (end >> 24) & 0xff; |
| 29 | int endR = (end >> 16) & 0xff; |
| 30 | int endG = (end >> 8) & 0xff; |
| 31 | int endB = end & 0xff; |
| 32 | |
| 33 | return (int)((startA + (int)(fraction * (endA - startA))) << 24) |
| 34 | | (int)((startR + (int)(fraction * (endR - startR))) << 16) |
| 35 | | (int)((startG + (int)(fraction * (endG - startG))) << 8) |
| 36 | | (int)((startB + (int)(fraction * (endB - startB)))); |
| 37 | } |
| 38 | |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 39 | void TestUtils::drawTextToCanvas(TestCanvas* canvas, const char* text, |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 40 | const SkPaint& paint, float x, float y) { |
| 41 | // drawing text requires GlyphID TextEncoding (which JNI layer would have done) |
| 42 | LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding, |
| 43 | "must use glyph encoding"); |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 44 | SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry); |
Chris Craik | d7448e6 | 2015-12-15 10:34:36 -0800 | [diff] [blame^] | 45 | SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I()); |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 46 | |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 47 | float totalAdvance = 0; |
| 48 | std::vector<glyph_t> glyphs; |
| 49 | std::vector<float> positions; |
| 50 | Rect bounds; |
| 51 | while (*text != '\0') { |
| 52 | SkUnichar unichar = SkUTF8_NextUnichar(&text); |
| 53 | glyph_t glyph = autoCache.getCache()->unicharToGlyph(unichar); |
| 54 | autoCache.getCache()->unicharToGlyph(unichar); |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 55 | |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 56 | // push glyph and its relative position |
| 57 | glyphs.push_back(glyph); |
| 58 | positions.push_back(totalAdvance); |
| 59 | positions.push_back(0); |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 60 | |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 61 | // compute bounds |
| 62 | SkGlyph skGlyph = autoCache.getCache()->getUnicharMetrics(unichar); |
| 63 | Rect glyphBounds(skGlyph.fWidth, skGlyph.fHeight); |
| 64 | glyphBounds.translate(totalAdvance + skGlyph.fLeft, skGlyph.fTop); |
| 65 | bounds.unionWith(glyphBounds); |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 66 | |
Chris Craik | 42a5407 | 2015-11-24 11:41:54 -0800 | [diff] [blame] | 67 | // advance next character |
| 68 | SkScalar skWidth; |
| 69 | paint.getTextWidths(&glyph, sizeof(glyph), &skWidth, NULL); |
| 70 | totalAdvance += skWidth; |
| 71 | } |
| 72 | |
| 73 | // apply alignment via x parameter (which JNI layer would have done) |
| 74 | if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| 75 | x -= totalAdvance / 2; |
| 76 | } else if (paint.getTextAlign() == SkPaint::kRight_Align) { |
| 77 | x -= totalAdvance; |
| 78 | } |
| 79 | |
| 80 | bounds.translate(x, y); |
| 81 | |
| 82 | // Force left alignment, since alignment offset is already baked in |
| 83 | SkPaint alignPaintCopy(paint); |
| 84 | alignPaintCopy.setTextAlign(SkPaint::kLeft_Align); |
| 85 | canvas->drawText(glyphs.data(), positions.data(), glyphs.size(), alignPaintCopy, x, y, |
| 86 | bounds.left, bounds.top, bounds.right, bounds.bottom, totalAdvance); |
Chris Craik | a171727 | 2015-11-19 13:02:43 -0800 | [diff] [blame] | 87 | } |
| 88 | |
Chris Craik | d7448e6 | 2015-12-15 10:34:36 -0800 | [diff] [blame^] | 89 | void TestUtils::drawTextToCanvas(TestCanvas* canvas, const char* text, |
| 90 | const SkPaint& paint, const SkPath& path) { |
| 91 | // drawing text requires GlyphID TextEncoding (which JNI layer would have done) |
| 92 | LOG_ALWAYS_FATAL_IF(paint.getTextEncoding() != SkPaint::kGlyphID_TextEncoding, |
| 93 | "must use glyph encoding"); |
| 94 | SkSurfaceProps surfaceProps(0, kUnknown_SkPixelGeometry); |
| 95 | SkAutoGlyphCacheNoGamma autoCache(paint, &surfaceProps, &SkMatrix::I()); |
| 96 | |
| 97 | std::vector<glyph_t> glyphs; |
| 98 | while (*text != '\0') { |
| 99 | SkUnichar unichar = SkUTF8_NextUnichar(&text); |
| 100 | glyphs.push_back(autoCache.getCache()->unicharToGlyph(unichar)); |
| 101 | } |
| 102 | canvas->drawTextOnPath(glyphs.data(), glyphs.size(), path, 0, 0, paint); |
| 103 | } |
| 104 | |
John Reck | 16c9d6a | 2015-11-17 15:51:08 -0800 | [diff] [blame] | 105 | } /* namespace uirenderer */ |
| 106 | } /* namespace android */ |