Mercurial > hg > orthanc-stone
view OrthancStone/Sources/Toolbox/TextRenderer.cpp @ 2146:743fa9c74443 dicom-sr tip
integration mainline->dicom-sr
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Fri, 16 Aug 2024 18:09:53 +0200 |
parents | 16c01cc201e7 |
children |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2023 Osimis S.A., Belgium * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation, either version 3 of * the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this program. If not, see * <http://www.gnu.org/licenses/>. **/ #include "TextRenderer.h" #include "../Scene2D/CairoCompositor.h" #include "../Scene2D/ColorTextureSceneLayer.h" #include "../Scene2D/FloatTextureSceneLayer.h" #include "../Scene2D/TextSceneLayer.h" #include "../Fonts/GlyphBitmapAlphabet.h" #include "../Fonts/FontRenderer.h" #include <Images/Image.h> #include <Images/ImageProcessing.h> #include <Images/PngWriter.h> #include <Toolbox.h> namespace OrthancStone { Orthanc::ImageAccessor* TextRenderer::Render(const std::string& ttf, unsigned int fontSize, const std::string& utf8String) { FontRenderer renderer; renderer.LoadFont(ttf, fontSize); // add each char to be rendered to the alphabet std::unique_ptr<GlyphBitmapAlphabet> alphabet(new GlyphBitmapAlphabet); size_t posInString = 0; uint32_t unicode; size_t utf8CharLength; while (posInString < utf8String.size()) { Orthanc::Toolbox::Utf8ToUnicodeCharacter(unicode, utf8CharLength, utf8String, posInString); alphabet->AddUnicodeCharacter(renderer, unicode); posInString += utf8CharLength; } std::unique_ptr<Orthanc::ImageAccessor> renderedText(alphabet->RenderText(utf8String)); // add a blank line on top of the text (to improve bilinear filtering of the topmost line) std::unique_ptr<Orthanc::Image> renderedTextExtended(new Orthanc::Image(renderedText->GetFormat(), renderedText->GetWidth(), renderedText->GetHeight() + 1, true)); Orthanc::ImageAccessor textRegion; Orthanc::ImageAccessor firstLineRegion; renderedTextExtended->GetRegion(firstLineRegion, 0, 0, renderedText->GetWidth(), 1); Orthanc::ImageProcessing::Set(firstLineRegion, 0); renderedTextExtended->GetRegion(textRegion, 0, 1, renderedText->GetWidth(), renderedText->GetHeight()); Orthanc::ImageProcessing::Copy(textRegion, *renderedText); return renderedTextExtended.release(); } Orthanc::ImageAccessor* TextRenderer::RenderWithAlpha(const std::string& ttf, unsigned int fontSize, const std::string& utf8String, uint8_t foreground) { std::unique_ptr<Orthanc::ImageAccessor> renderedText8(Render(ttf, fontSize, utf8String)); std::unique_ptr<Orthanc::Image> target(new Orthanc::Image(Orthanc::PixelFormat_RGBA32, renderedText8->GetWidth(), renderedText8->GetHeight(), true)); Orthanc::ImageProcessing::Set(*target, foreground, foreground, foreground, *renderedText8); return target.release(); } // currently disabled because the background is actually not transparent once we use the Cairo Compositor ! // // // renders text in color + a border with alpha in a RGBA32 image // Orthanc::ImageAccessor* TextRenderer::RenderWithAlpha(const std::string& ttf, // unsigned int fontSize, // const std::string& utf8String, // uint8_t foreground, // uint8_t borderColor) // { // std::unique_ptr<Orthanc::ImageAccessor> renderedBorderAlpha(RenderWithAlpha(ttf, fontSize, utf8String, borderColor)); // std::unique_ptr<Orthanc::ImageAccessor> renderedTextAlpha(RenderWithAlpha(ttf, fontSize, utf8String, foreground)); // unsigned int textWidth = renderedBorderAlpha->GetWidth(); // unsigned int textHeight = renderedBorderAlpha->GetHeight(); // Scene2D targetScene; // std::unique_ptr<ColorTextureSceneLayer> borderLayerLeft(new ColorTextureSceneLayer(*renderedBorderAlpha)); // std::unique_ptr<ColorTextureSceneLayer> borderLayerRight(new ColorTextureSceneLayer(*renderedBorderAlpha)); // std::unique_ptr<ColorTextureSceneLayer> borderLayerTop(new ColorTextureSceneLayer(*renderedBorderAlpha)); // std::unique_ptr<ColorTextureSceneLayer> borderLayerBottom(new ColorTextureSceneLayer(*renderedBorderAlpha)); // std::unique_ptr<ColorTextureSceneLayer> textLayerCenter(new ColorTextureSceneLayer(*renderedTextAlpha)); // borderLayerLeft->SetOrigin(0, 1); // borderLayerRight->SetOrigin(2, 1); // borderLayerTop->SetOrigin(1, 0); // borderLayerBottom->SetOrigin(1, 2); // textLayerCenter->SetOrigin(1, 1); // targetScene.SetLayer(1, borderLayerLeft.release()); // targetScene.SetLayer(2, borderLayerRight.release()); // targetScene.SetLayer(3, borderLayerTop.release()); // targetScene.SetLayer(4, borderLayerBottom.release()); // targetScene.SetLayer(5, textLayerCenter.release()); // targetScene.FitContent(textWidth + 2, textHeight + 2); // CairoCompositor compositor(targetScene, textWidth + 2, textHeight + 2); // compositor.Refresh(); // Orthanc::ImageAccessor canvas; // compositor.GetCanvas().GetReadOnlyAccessor(canvas); // std::unique_ptr<Orthanc::Image> output(new Orthanc::Image(Orthanc::PixelFormat_RGBA32, canvas.GetWidth(), canvas.GetHeight(), false)); // Orthanc::ImageProcessing::Convert(*output, canvas); // return output.release(); // } }