Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Toolbox/TextRenderer.cpp @ 1870:3889ae96d2e9
added copyright UCLouvain
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 11 Jan 2022 11:04:09 +0100 |
| parents | 9ac2a65d4172 |
| children | 7053b8a0aaec |
| rev | line source |
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| 1463 | 1 /** |
| 2 * Stone of Orthanc | |
| 3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics | |
| 4 * Department, University Hospital of Liege, Belgium | |
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2021 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 1463 | 7 * |
| 8 * This program is free software: you can redistribute it and/or | |
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9 * modify it under the terms of the GNU Lesser General Public License |
| 1463 | 10 * as published by the Free Software Foundation, either version 3 of |
| 11 * the License, or (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, but | |
| 14 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 * Lesser General Public License for more details. |
| 1463 | 17 * |
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18 * You should have received a copy of the GNU Lesser General Public |
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19 * License along with this program. If not, see |
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20 * <http://www.gnu.org/licenses/>. |
| 1463 | 21 **/ |
| 22 | |
| 23 | |
| 24 #include "TextRenderer.h" | |
| 25 | |
| 26 #include "../Scene2D/CairoCompositor.h" | |
| 27 #include "../Scene2D/ColorTextureSceneLayer.h" | |
| 28 #include "../Scene2D/FloatTextureSceneLayer.h" | |
| 29 #include "../Scene2D/TextSceneLayer.h" | |
| 30 #include "../Fonts/GlyphBitmapAlphabet.h" | |
| 31 #include "../Fonts/FontRenderer.h" | |
| 32 | |
| 33 #include <Images/Image.h> | |
| 34 #include <Images/ImageProcessing.h> | |
| 35 #include <Images/PngWriter.h> | |
| 36 #include <Toolbox.h> | |
| 37 | |
| 38 namespace OrthancStone | |
| 39 { | |
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40 Orthanc::ImageAccessor* TextRenderer::Render(const std::string& ttf, |
| 1463 | 41 unsigned int fontSize, |
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42 const std::string& utf8String) |
| 1463 | 43 { |
| 44 FontRenderer renderer; | |
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45 renderer.LoadFont(ttf, fontSize); |
| 1463 | 46 |
| 47 // add each char to be rendered to the alphabet | |
| 48 std::unique_ptr<GlyphBitmapAlphabet> alphabet(new GlyphBitmapAlphabet); | |
| 49 | |
| 50 size_t posInString = 0; | |
| 51 uint32_t unicode; | |
| 52 size_t utf8CharLength; | |
| 53 | |
| 54 while (posInString < utf8String.size()) | |
| 55 { | |
| 56 Orthanc::Toolbox::Utf8ToUnicodeCharacter(unicode, utf8CharLength, utf8String, posInString); | |
| 57 alphabet->AddUnicodeCharacter(renderer, unicode); | |
| 58 posInString += utf8CharLength; | |
| 59 } | |
| 60 | |
| 61 | |
| 62 std::unique_ptr<Orthanc::ImageAccessor> renderedText(alphabet->RenderText(utf8String)); | |
| 63 | |
| 64 // add a blank line on top of the text (to improve bilinear filtering of the topmost line) | |
| 65 std::unique_ptr<Orthanc::Image> renderedTextExtended(new Orthanc::Image(renderedText->GetFormat(), renderedText->GetWidth(), renderedText->GetHeight() + 1, true)); | |
| 66 | |
| 67 Orthanc::ImageAccessor textRegion; | |
| 68 Orthanc::ImageAccessor firstLineRegion; | |
| 69 | |
| 70 renderedTextExtended->GetRegion(firstLineRegion, 0, 0, renderedText->GetWidth(), 1); | |
| 71 Orthanc::ImageProcessing::Set(firstLineRegion, 0); | |
| 72 | |
| 73 renderedTextExtended->GetRegion(textRegion, 0, 1, renderedText->GetWidth(), renderedText->GetHeight()); | |
| 74 Orthanc::ImageProcessing::Copy(textRegion, *renderedText); | |
| 75 | |
| 76 return renderedTextExtended.release(); | |
| 77 } | |
| 78 | |
| 79 | |
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80 Orthanc::ImageAccessor* TextRenderer::RenderWithAlpha(const std::string& ttf, |
| 1463 | 81 unsigned int fontSize, |
| 82 const std::string& utf8String, | |
| 83 uint8_t foreground) | |
| 84 { | |
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85 std::unique_ptr<Orthanc::ImageAccessor> renderedText8(Render(ttf, fontSize, utf8String)); |
| 1463 | 86 std::unique_ptr<Orthanc::Image> target(new Orthanc::Image(Orthanc::PixelFormat_RGBA32, renderedText8->GetWidth(), renderedText8->GetHeight(), true)); |
| 87 | |
| 88 Orthanc::ImageProcessing::Set(*target, foreground, foreground, foreground, *renderedText8); | |
| 89 return target.release(); | |
| 90 } | |
| 91 | |
| 92 | |
| 93 // currently disabled because the background is actually not transparent once we use the Cairo Compositor ! | |
| 94 // | |
| 95 // // renders text in color + a border with alpha in a RGBA32 image | |
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96 // Orthanc::ImageAccessor* TextRenderer::RenderWithAlpha(const std::string& ttf, |
| 1463 | 97 // unsigned int fontSize, |
| 98 // const std::string& utf8String, | |
| 99 // uint8_t foreground, | |
| 100 // uint8_t borderColor) | |
| 101 // { | |
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102 // std::unique_ptr<Orthanc::ImageAccessor> renderedBorderAlpha(RenderWithAlpha(ttf, fontSize, utf8String, borderColor)); |
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103 // std::unique_ptr<Orthanc::ImageAccessor> renderedTextAlpha(RenderWithAlpha(ttf, fontSize, utf8String, foreground)); |
| 1463 | 104 |
| 105 // unsigned int textWidth = renderedBorderAlpha->GetWidth(); | |
| 106 // unsigned int textHeight = renderedBorderAlpha->GetHeight(); | |
| 107 | |
| 108 // Scene2D targetScene; | |
| 109 // std::unique_ptr<ColorTextureSceneLayer> borderLayerLeft(new ColorTextureSceneLayer(*renderedBorderAlpha)); | |
| 110 // std::unique_ptr<ColorTextureSceneLayer> borderLayerRight(new ColorTextureSceneLayer(*renderedBorderAlpha)); | |
| 111 // std::unique_ptr<ColorTextureSceneLayer> borderLayerTop(new ColorTextureSceneLayer(*renderedBorderAlpha)); | |
| 112 // std::unique_ptr<ColorTextureSceneLayer> borderLayerBottom(new ColorTextureSceneLayer(*renderedBorderAlpha)); | |
| 113 // std::unique_ptr<ColorTextureSceneLayer> textLayerCenter(new ColorTextureSceneLayer(*renderedTextAlpha)); | |
| 114 | |
| 115 // borderLayerLeft->SetOrigin(0, 1); | |
| 116 // borderLayerRight->SetOrigin(2, 1); | |
| 117 // borderLayerTop->SetOrigin(1, 0); | |
| 118 // borderLayerBottom->SetOrigin(1, 2); | |
| 119 // textLayerCenter->SetOrigin(1, 1); | |
| 120 // targetScene.SetLayer(1, borderLayerLeft.release()); | |
| 121 // targetScene.SetLayer(2, borderLayerRight.release()); | |
| 122 // targetScene.SetLayer(3, borderLayerTop.release()); | |
| 123 // targetScene.SetLayer(4, borderLayerBottom.release()); | |
| 124 // targetScene.SetLayer(5, textLayerCenter.release()); | |
| 125 | |
| 126 // targetScene.FitContent(textWidth + 2, textHeight + 2); | |
| 127 // CairoCompositor compositor(targetScene, textWidth + 2, textHeight + 2); | |
| 128 // compositor.Refresh(); | |
| 129 | |
| 130 // Orthanc::ImageAccessor canvas; | |
| 131 // compositor.GetCanvas().GetReadOnlyAccessor(canvas); | |
| 132 | |
| 133 // std::unique_ptr<Orthanc::Image> output(new Orthanc::Image(Orthanc::PixelFormat_RGBA32, canvas.GetWidth(), canvas.GetHeight(), false)); | |
| 134 // Orthanc::ImageProcessing::Convert(*output, canvas); | |
| 135 // return output.release(); | |
| 136 // } | |
| 137 } |