Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Scene2D/Internals/CairoTextRenderer.cpp @ 1883:fba6e550e0ee
apply rescale slope/intercept in rendering plugin
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
|---|---|
| date | Wed, 12 Jan 2022 18:26:05 +0100 |
| parents | 7053b8a0aaec |
| children | 07964689cb0b |
| 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) 2017-2022 Osimis S.A., Belgium |
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6 * Copyright (C) 2021-2022 Sebastien Jodogne, ICTEAM UCLouvain, Belgium |
| 597 | 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 |
| 597 | 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. |
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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/>. |
| 597 | 21 **/ |
| 22 | |
| 23 | |
| 24 #include "CairoTextRenderer.h" | |
| 25 | |
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26 #include <OrthancException.h> |
| 597 | 27 |
| 28 namespace OrthancStone | |
| 29 { | |
| 30 namespace Internals | |
| 31 { | |
| 32 CairoTextRenderer::CairoTextRenderer(ICairoContextProvider& target, | |
| 33 const GlyphBitmapAlphabet& alphabet, | |
| 34 const TextSceneLayer& layer) : | |
| 35 CairoBaseRenderer(target, layer) | |
| 36 { | |
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37 std::unique_ptr<Orthanc::ImageAccessor> source(alphabet.RenderText(layer.GetText())); |
| 597 | 38 |
| 39 if (source.get() != NULL) | |
| 40 { | |
| 41 text_.SetSize(source->GetWidth(), source->GetHeight(), true); | |
| 42 | |
| 1571 | 43 Orthanc::ImageAccessor accessor; |
| 44 text_.GetWriteableAccessor(accessor); | |
| 597 | 45 |
| 46 if (source->GetFormat() != Orthanc::PixelFormat_Grayscale8 || | |
| 1571 | 47 accessor.GetFormat() != Orthanc::PixelFormat_BGRA32) |
| 597 | 48 { |
| 49 throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError); | |
| 50 } | |
| 51 | |
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52 const unsigned int height = source->GetHeight(); |
| 597 | 53 const unsigned int width = source->GetWidth(); |
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54 const Color& color = layer.GetColor(); |
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55 |
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56 for (unsigned int y = 0; y < height; y++) |
| 597 | 57 { |
| 58 const uint8_t* p = reinterpret_cast<const uint8_t*>(source->GetConstRow(y)); | |
| 1571 | 59 uint8_t* q = reinterpret_cast<uint8_t*>(accessor.GetRow(y)); |
| 597 | 60 |
| 61 for (unsigned int x = 0; x < width; x++) | |
| 62 { | |
| 63 unsigned int alpha = *p; | |
| 64 | |
| 65 // Premultiplied alpha | |
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66 q[0] = static_cast<uint8_t>((color.GetBlue() * alpha) / 255); |
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67 q[1] = static_cast<uint8_t>((color.GetGreen() * alpha) / 255); |
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68 q[2] = static_cast<uint8_t>((color.GetRed() * alpha) / 255); |
| 597 | 69 q[3] = *p; |
| 70 | |
| 71 p++; | |
| 72 q += 4; | |
| 73 } | |
| 74 } | |
| 75 | |
| 76 cairo_surface_mark_dirty(text_.GetObject()); | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 | |
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81 void CairoTextRenderer::Render(const AffineTransform2D& transform, |
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82 unsigned int canvasWidth, |
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83 unsigned int canvasHeight) |
| 597 | 84 { |
| 85 if (text_.GetWidth() != 0 && | |
| 86 text_.GetHeight() != 0) | |
| 87 { | |
| 88 const TextSceneLayer& layer = GetLayer<TextSceneLayer>(); | |
| 89 | |
| 90 cairo_t* cr = GetCairoContext(); | |
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91 cairo_set_source_rgb(cr, layer.GetColor().GetRedAsFloat(), |
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92 layer.GetColor().GetGreenAsFloat(), |
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93 layer.GetColor().GetBlueAsFloat()); |
| 597 | 94 |
| 95 double dx, dy; // In pixels | |
| 96 ComputeAnchorTranslation(dx, dy, layer.GetAnchor(), text_.GetWidth(), | |
| 97 text_.GetHeight(), layer.GetBorder()); | |
| 98 | |
| 99 double x = layer.GetX(); | |
| 100 double y = layer.GetY(); | |
| 101 transform.Apply(x, y); | |
| 102 | |
| 103 cairo_save(cr); | |
| 104 | |
| 105 cairo_matrix_t t; | |
| 106 cairo_matrix_init_identity(&t); | |
| 107 cairo_matrix_translate(&t, x + dx, y + dy); | |
| 108 cairo_transform(cr, &t); | |
| 109 | |
| 110 cairo_set_operator(cr, CAIRO_OPERATOR_OVER); | |
| 111 cairo_set_source_surface(cr, text_.GetObject(), 0, 0); | |
| 112 cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_BILINEAR); | |
| 113 cairo_paint(cr); | |
| 114 | |
| 115 cairo_restore(cr); | |
| 116 } | |
| 117 } | |
| 118 } | |
| 119 } |