2015-04-13 04:09:02 -05:00
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
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2015-03-17 18:56:15 -05:00
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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2015-03-28 06:53:44 -05:00
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#include <cstdlib>
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2015-04-09 17:25:48 -05:00
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#include <cstring>
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2015-03-17 18:56:15 -05:00
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#include <string>
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2015-03-28 06:53:44 -05:00
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#include <png.h>
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2015-03-17 18:56:15 -05:00
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#include <Poco/Process.h>
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#include <Poco/Thread.h>
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#include "Util.hpp"
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2015-03-28 06:53:44 -05:00
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// Callback functions for libpng
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extern "C"
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{
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static void user_write_status_fn(png_structp, png_uint_32, int)
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{
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}
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static void user_write_fn(png_structp png_ptr, png_bytep data, png_size_t length)
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{
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std::vector<char> *outputp = (std::vector<char> *) png_get_io_ptr(png_ptr);
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size_t oldsize = outputp->size();
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outputp->resize(oldsize + length);
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memcpy(outputp->data() + oldsize, data, length);
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}
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static void user_flush_fn(png_structp)
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{
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}
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}
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2015-03-26 10:07:52 -05:00
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namespace Util
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2015-03-17 18:56:15 -05:00
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{
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2015-03-26 10:07:52 -05:00
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std::string logPrefix()
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{
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return std::to_string(Poco::Process::id()) + ":" + (Poco::Thread::current() ? std::to_string(Poco::Thread::current()->id()) : "0") + ": ";
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}
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2015-03-28 06:53:44 -05:00
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bool windowingAvailable()
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{
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#ifdef __linux
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return std::getenv("DISPLAY") != NULL;
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#endif
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return false;
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}
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2015-04-10 04:39:12 -05:00
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bool encodePNGAndAppendToBuffer(unsigned char *pixmap, int width, int height, std::vector<char>& output)
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2015-03-28 06:53:44 -05:00
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{
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png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
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png_infop info_ptr = png_create_info_struct(png_ptr);
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if (setjmp(png_jmpbuf(png_ptr)))
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{
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png_destroy_write_struct(&png_ptr, NULL);
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return false;
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}
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png_set_IHDR(png_ptr, info_ptr, width, height, 8, PNG_COLOR_TYPE_RGB_ALPHA, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
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png_set_write_fn(png_ptr, &output, user_write_fn, user_flush_fn);
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png_set_write_status_fn(png_ptr, user_write_status_fn);
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png_write_info(png_ptr, info_ptr);
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for (int y = 0; y < height; ++y)
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png_write_row(png_ptr, pixmap + y * width * 4);
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png_write_end(png_ptr, info_ptr);
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png_destroy_write_struct(&png_ptr, NULL);
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return true;
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}
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2015-03-17 18:56:15 -05:00
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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