Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/CairoTextRenderer.cpp @ 1556:8898f8f755c8
typo
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Tue, 18 Aug 2020 11:58:47 +0200 |
| parents | 244ad1e4e76a |
| children | 85e117739eca |
| rev | line source |
|---|---|
| 597 | 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) 2017-2020 Osimis S.A., Belgium |
| 597 | 6 * |
| 7 * This program is free software: you can redistribute it and/or | |
| 8 * modify it under the terms of the GNU Affero General Public License | |
| 9 * as published by the Free Software Foundation, either version 3 of | |
| 10 * the License, or (at your option) any later version. | |
| 11 * | |
| 12 * This program is distributed in the hope that it will be useful, but | |
| 13 * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 * Affero General Public License for more details. | |
| 16 * | |
| 17 * You should have received a copy of the GNU Affero General Public License | |
| 18 * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 19 **/ | |
| 20 | |
| 21 | |
| 22 #include "CairoTextRenderer.h" | |
| 23 | |
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24 #include <OrthancException.h> |
| 597 | 25 |
| 26 namespace OrthancStone | |
| 27 { | |
| 28 namespace Internals | |
| 29 { | |
| 30 CairoTextRenderer::CairoTextRenderer(ICairoContextProvider& target, | |
| 31 const GlyphBitmapAlphabet& alphabet, | |
| 32 const TextSceneLayer& layer) : | |
| 33 CairoBaseRenderer(target, layer) | |
| 34 { | |
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35 std::unique_ptr<Orthanc::ImageAccessor> source(alphabet.RenderText(layer.GetText())); |
| 597 | 36 |
| 37 if (source.get() != NULL) | |
| 38 { | |
| 39 text_.SetSize(source->GetWidth(), source->GetHeight(), true); | |
| 40 | |
| 41 Orthanc::ImageAccessor target; | |
| 42 text_.GetWriteableAccessor(target); | |
| 43 | |
| 44 if (source->GetFormat() != Orthanc::PixelFormat_Grayscale8 || | |
| 45 target.GetFormat() != Orthanc::PixelFormat_BGRA32) | |
| 46 { | |
| 47 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 48 } | |
| 49 | |
| 50 const unsigned int width = source->GetWidth(); | |
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51 const Color& color = layer.GetColor(); |
| 597 | 52 |
| 53 for (unsigned int y = 0; y < source->GetHeight(); y++) | |
| 54 { | |
| 55 const uint8_t* p = reinterpret_cast<const uint8_t*>(source->GetConstRow(y)); | |
| 56 uint8_t* q = reinterpret_cast<uint8_t*>(target.GetRow(y)); | |
| 57 | |
| 58 for (unsigned int x = 0; x < width; x++) | |
| 59 { | |
| 60 unsigned int alpha = *p; | |
| 61 | |
| 62 // Premultiplied alpha | |
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63 q[0] = static_cast<uint8_t>((color.GetBlue() * alpha) / 255); |
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64 q[1] = static_cast<uint8_t>((color.GetGreen() * alpha) / 255); |
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65 q[2] = static_cast<uint8_t>((color.GetRed() * alpha) / 255); |
| 597 | 66 q[3] = *p; |
| 67 | |
| 68 p++; | |
| 69 q += 4; | |
| 70 } | |
| 71 } | |
| 72 | |
| 73 cairo_surface_mark_dirty(text_.GetObject()); | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 | |
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78 void CairoTextRenderer::Render(const AffineTransform2D& transform, |
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79 unsigned int canvasWidth, |
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80 unsigned int canvasHeight) |
| 597 | 81 { |
| 82 if (text_.GetWidth() != 0 && | |
| 83 text_.GetHeight() != 0) | |
| 84 { | |
| 85 const TextSceneLayer& layer = GetLayer<TextSceneLayer>(); | |
| 86 | |
| 87 cairo_t* cr = GetCairoContext(); | |
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88 cairo_set_source_rgb(cr, layer.GetColor().GetRedAsFloat(), |
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89 layer.GetColor().GetGreenAsFloat(), |
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90 layer.GetColor().GetBlueAsFloat()); |
| 597 | 91 |
| 92 double dx, dy; // In pixels | |
| 93 ComputeAnchorTranslation(dx, dy, layer.GetAnchor(), text_.GetWidth(), | |
| 94 text_.GetHeight(), layer.GetBorder()); | |
| 95 | |
| 96 double x = layer.GetX(); | |
| 97 double y = layer.GetY(); | |
| 98 transform.Apply(x, y); | |
| 99 | |
| 100 cairo_save(cr); | |
| 101 | |
| 102 cairo_matrix_t t; | |
| 103 cairo_matrix_init_identity(&t); | |
| 104 cairo_matrix_translate(&t, x + dx, y + dy); | |
| 105 cairo_transform(cr, &t); | |
| 106 | |
| 107 cairo_set_operator(cr, CAIRO_OPERATOR_OVER); | |
| 108 cairo_set_source_surface(cr, text_.GetObject(), 0, 0); | |
| 109 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR); | |
| 110 cairo_paint(cr); | |
| 111 | |
| 112 cairo_restore(cr); | |
| 113 } | |
| 114 } | |
| 115 } | |
| 116 } |