mirror of https://github.com/TTimo/GtkRadiant.git
243 lines
7.2 KiB
C++
243 lines
7.2 KiB
C++
/*
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Copyright (C) 1999-2007 id Software, Inc. and contributors.
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For a list of contributors, see the accompanying CONTRIBUTORS file.
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This file is part of GtkRadiant.
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GtkRadiant is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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GtkRadiant is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GtkRadiant; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// =============================================================================
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// global tables
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#include "plugin.h"
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_QERFuncTable_1 g_FuncTable;
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_QERFileSystemTable g_FileSystemTable;
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// =============================================================================
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// SYNAPSE
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#include "synapse.h"
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class CSynapseClientImage : public CSynapseClient
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{
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public:
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// CSynapseClient API
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bool RequestAPI(APIDescriptor_t *pAPI);
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const char* GetInfo();
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CSynapseClientImage() { }
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virtual ~CSynapseClientImage() { }
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};
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CSynapseServer* g_pSynapseServer = NULL;
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CSynapseClientImage g_SynapseClient;
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extern "C" CSynapseClient* SYNAPSE_DLL_EXPORT Synapse_EnumerateInterfaces (const char *version, CSynapseServer *pServer)
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{
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if (strcmp(version, SYNAPSE_VERSION))
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{
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Syn_Printf("ERROR: synapse API version mismatch: should be '" SYNAPSE_VERSION "', got '%s'\n", version);
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return NULL;
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}
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g_pSynapseServer = pServer;
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g_pSynapseServer->IncRef();
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Set_Syn_Printf(g_pSynapseServer->Get_Syn_Printf());
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g_SynapseClient.AddAPI(IMAGE_MAJOR, "png", sizeof(_QERPlugImageTable));
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g_SynapseClient.AddAPI(RADIANT_MAJOR, NULL, sizeof(_QERFuncTable_1), SYN_REQUIRE, &g_FuncTable);
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// NOTE: if imagepng starts being used for non "VFS" "pk3" config, need to add a dynamic config chunk
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// see:
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// http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=794
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// http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=800
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g_SynapseClient.AddAPI(VFS_MAJOR, "pk3", sizeof(_QERFileSystemTable), SYN_REQUIRE, &g_FileSystemTable);
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return &g_SynapseClient;
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}
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bool CSynapseClientImage::RequestAPI(APIDescriptor_t *pAPI)
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{
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if (!strcmp(pAPI->major_name, IMAGE_MAJOR))
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{
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_QERPlugImageTable* pTable= static_cast<_QERPlugImageTable*>(pAPI->mpTable);
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if (!strcmp(pAPI->minor_name, "png"))
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{
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pTable->m_pfnLoadImage = &LoadImage;
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return true;
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}
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}
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Syn_Printf("ERROR: RequestAPI( '%s' ) not found in '%s'\n", pAPI->major_name, GetInfo());
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return false;
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}
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#include "version.h"
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const char* CSynapseClientImage::GetInfo()
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{
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return "PNG loader module built " __DATE__ " " RADIANT_VERSION;
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}
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// ====== PNG loader functionality ======
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#include "png.h"
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#ifdef __APPLE__ //tigital
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#include <stdlib.h>
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#endif
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void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
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{
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g_FuncTable.m_pfnSysPrintf ("libpng warning: %s\n", warning_msg);
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}
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void user_error_fn(png_structp png_ptr, png_const_charp error_msg)
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{
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g_FuncTable.m_pfnSysPrintf ("libpng error: %s\n", error_msg);
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longjmp(png_ptr->jmpbuf, 0);
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}
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void user_read_data(png_structp png_ptr, png_bytep data, png_uint_32 length)
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{
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png_bytep *p_p_fbuffer = (png_bytep*)png_get_io_ptr(png_ptr);
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memcpy(data, *p_p_fbuffer, length);
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*p_p_fbuffer += length;
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}
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void LoadImage (const char *filename, unsigned char **pic, int *width, int *height)
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{
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png_byte** row_pointers;
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unsigned char *fbuffer = NULL;
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png_bytep p_fbuffer;
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int nLen = g_FileSystemTable.m_pfnLoadFile( (char *)filename, (void **)&fbuffer, 0 );
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if (nLen == -1)
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return;
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p_fbuffer = fbuffer;
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// the reading glue
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// http://www.libpng.org/pub/png/libpng-manual.html
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png_structp png_ptr = png_create_read_struct
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(PNG_LIBPNG_VER_STRING, png_voidp_NULL,
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user_error_fn, user_warning_fn);
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if (!png_ptr)
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{
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g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_read_struct\n");
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return;
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}
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png_infop info_ptr = png_create_info_struct(png_ptr);
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if (!info_ptr) {
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png_destroy_read_struct(&png_ptr,
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png_infopp_NULL, png_infopp_NULL);
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g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_info_struct (info_ptr)\n");
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return;
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}
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png_infop end_info = png_create_info_struct(png_ptr);
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if (!end_info) {
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png_destroy_read_struct(&png_ptr, &info_ptr,
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png_infopp_NULL);
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g_FuncTable.m_pfnSysPrintf ("libpng error: png_create_info_struct (end_info)\n");
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return;
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}
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// configure the read function
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png_set_read_fn(png_ptr, (voidp)&p_fbuffer, (png_rw_ptr)&user_read_data);
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if (setjmp(png_ptr->jmpbuf)) {
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png_destroy_read_struct(&png_ptr, &info_ptr,
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&end_info);
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if (*pic)
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{
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g_free(*pic);
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free(row_pointers);
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}
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return;
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}
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png_read_info(png_ptr, info_ptr);
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int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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int color_type = png_get_color_type(png_ptr, info_ptr);
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// we want to treat all images the same way
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// The following code transforms grayscale images of less than 8 to 8 bits,
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// changes paletted images to RGB, and adds a full alpha channel if there is
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// transparency information in a tRNS chunk.
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if (color_type == PNG_COLOR_TYPE_PALETTE)
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png_set_palette_to_rgb(png_ptr);
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if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
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png_set_gray_1_2_4_to_8(png_ptr);
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if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
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png_set_tRNS_to_alpha(png_ptr);
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if ( ! ( color_type & PNG_COLOR_MASK_ALPHA ) ) {
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// Set the background color to draw transparent and alpha images over.
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png_color_16 my_background, *image_background;
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if (png_get_bKGD(png_ptr, info_ptr, &image_background))
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png_set_background(png_ptr, image_background,
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PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
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else
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png_set_background(png_ptr, &my_background,
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PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
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// Add alpha byte after each RGB triplet
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png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
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}
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// read the sucker in one chunk
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png_read_update_info(png_ptr, info_ptr);
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color_type = png_get_color_type(png_ptr, info_ptr);
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bit_depth = png_get_bit_depth(png_ptr, info_ptr);
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*width = png_get_image_width(png_ptr, info_ptr);
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*height = png_get_image_height(png_ptr, info_ptr);
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// allocate the pixel buffer, and the row pointers
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int size = (*width)*(*height)*4;
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// still have to use that g_malloc heresy
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// http://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=491
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*pic = (unsigned char *)g_malloc(size);
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row_pointers = (png_byte**) malloc((*height) * sizeof(png_byte*));
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int i;
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for(i = 0; i < (*height); i++)
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row_pointers[i] = (png_byte*)(*pic) + i * 4 * (*width);
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// actual read
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png_read_image(png_ptr, row_pointers);
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/* read rest of file, and get additional chunks in info_ptr - REQUIRED */
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png_read_end(png_ptr, info_ptr);
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/* free up the memory structure */
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png_destroy_read_struct(&png_ptr, &info_ptr, png_infopp_NULL);
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free(row_pointers);
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g_FileSystemTable.m_pfnFreeFile (fbuffer);
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}
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