Mercurial > hg > orthanc-stone
view Framework/Fonts/FontRenderer.cpp @ 1327:4f8db2d202c8 broker
OrthancSeriesProgressiveLoader now has two modes that
can be selected at object creation :
- progressive (will first load jpeg50, then jpeg90 then PAM)
- non-progressive (will directly load PAM (uncompressed))
Please note that the slice loading order remains dynamic
and depending upon the slice that the client code wishes
to extract from the volume.
author | Benjamin Golinvaux <bgo@osimis.io> |
---|---|
date | Wed, 25 Mar 2020 14:34:27 +0100 |
parents | 8a0a62189f46 |
children | 30deba7bc8e2 |
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/** * Stone of Orthanc * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics * Department, University Hospital of Liege, Belgium * Copyright (C) 2017-2020 Osimis S.A., Belgium * * This program is free software: you can redistribute it and/or * modify it under the terms of the GNU Affero 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 * Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. **/ #include "FontRenderer.h" #include "../Toolbox/DynamicBitmap.h" #include <Core/OrthancException.h> #include <ft2build.h> #include FT_FREETYPE_H #include FT_GLYPH_H // https://stackoverflow.com/questions/31161284/how-can-i-get-the-corresponding-error-string-from-an-ft-error-code static std::string GetErrorMessage(FT_Error err) { #undef __FTERRORS_H__ #define FT_ERRORDEF( e, v, s ) case e: return s; #define FT_ERROR_START_LIST switch (err) { #define FT_ERROR_END_LIST } #include FT_ERRORS_H return "(Unknown error)"; } static void CheckError(FT_Error err) { if (err != 0) { throw Orthanc::OrthancException(Orthanc::ErrorCode_InternalError, "Error in FreeType: " + GetErrorMessage(err)); } } namespace OrthancStone { class FontRenderer::PImpl : public boost::noncopyable { private: std::string fontContent_; FT_Library library_; FT_Face face_; void Clear() { if (face_ != NULL) { FT_Done_Face(face_); face_ = NULL; } fontContent_.clear(); } public: PImpl() : library_(NULL), face_(NULL) { CheckError(FT_Init_FreeType(&library_)); } ~PImpl() { Clear(); FT_Done_FreeType(library_); } void LoadFont(const std::string& fontContent, unsigned int fontSize) { Clear(); // It is necessary to make a private copy of the font, as // Freetype makes the assumption that the buffer containing the // font is never deleted fontContent_.assign(fontContent); const FT_Byte* data = reinterpret_cast<const FT_Byte*>(fontContent_.c_str()); CheckError(FT_New_Memory_Face( library_, data, static_cast<FT_Long>(fontContent_.size()), 0, &face_)); CheckError(FT_Set_Char_Size(face_, // handle to face object 0, // char_width in 1/64th of points fontSize * 64, // char_height in 1/64th of points 72, // horizontal device resolution 72)); // vertical device resolution CheckError(FT_Select_Charmap(face_, FT_ENCODING_UNICODE)); } Glyph* Render(uint32_t unicode) { if (face_ == NULL) { throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls, "First call LoadFont()"); } else if (FT_Load_Char(face_, unicode, FT_LOAD_RENDER) != 0) { // This character is not available return NULL; } else { if (face_->glyph->format != FT_GLYPH_FORMAT_BITMAP) { throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented); //CheckError(FT_Glyph_To_Bitmap(&glyph, FT_RENDER_MODE_NORMAL, 0, 1)); } Orthanc::ImageAccessor bitmap; bitmap.AssignReadOnly(Orthanc::PixelFormat_Grayscale8, face_->glyph->bitmap.width, face_->glyph->bitmap.rows, face_->glyph->bitmap.pitch, face_->glyph->bitmap.buffer); std::unique_ptr<Glyph> glyph( new Glyph(bitmap.GetWidth(), bitmap.GetHeight(), face_->glyph->bitmap_left, -face_->glyph->bitmap_top, // Positive for an upwards vertical distance face_->glyph->advance.x >> 6, face_->glyph->metrics.vertAdvance >> 6)); glyph->SetPayload(new DynamicBitmap(bitmap)); return glyph.release(); } } }; FontRenderer::FontRenderer() : pimpl_(new PImpl) { } void FontRenderer::LoadFont(const std::string& fontContent, unsigned int fontSize) { pimpl_->LoadFont(fontContent, fontSize); } void FontRenderer::LoadFont(Orthanc::EmbeddedResources::FileResourceId resource, unsigned int fontSize) { std::string content; Orthanc::EmbeddedResources::GetFileResource(content, resource); LoadFont(content, fontSize); } Glyph* FontRenderer::Render(uint32_t unicode) { return pimpl_->Render(unicode); } }