--- /dev/null
+/*
+Copyright (C) 1999-2006 Id Software, Inc. and contributors.
+For a list of contributors, see the accompanying CONTRIBUTORS file.
+
+This file is part of GtkRadiant.
+
+GtkRadiant is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+GtkRadiant 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 General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GtkRadiant; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#include "plugin.h"
+
+#include "debugging/debugging.h"
+
+#include "ifilesystem.h"
+#include "iimage.h"
+
+#include "imagelib.h"
+
+// ====== PNG loader functionality ======
+
+#include "png.h"
+#include <stdlib.h>
+
+void user_warning_fn(png_structp png_ptr, png_const_charp warning_msg)
+{
+ globalErrorStream() << "libpng warning: " << warning_msg << "\n";
+}
+
+void user_error_fn(png_structp png_ptr, png_const_charp error_msg)
+{
+ globalErrorStream() << "libpng error: " << error_msg << "\n";
+ longjmp(png_jmpbuf(png_ptr), 0);
+}
+
+void user_read_data(png_structp png_ptr, png_bytep data, png_uint_32 length)
+{
+ png_bytep *p_p_fbuffer = (png_bytep*)png_get_io_ptr(png_ptr);
+ memcpy(data, *p_p_fbuffer, length);
+ *p_p_fbuffer += length;
+}
+
+Image* LoadPNGBuff (unsigned char* fbuffer)
+{
+ png_byte** row_pointers;
+ png_bytep p_fbuffer;
+
+ p_fbuffer = fbuffer;
+
+ // the reading glue
+ // http://www.libpng.org/pub/png/libpng-manual.html
+
+ png_structp png_ptr = png_create_read_struct
+ (PNG_LIBPNG_VER_STRING, (png_voidp)NULL,
+ user_error_fn, user_warning_fn);
+ if (!png_ptr)
+ {
+ globalErrorStream() << "libpng error: png_create_read_struct\n";
+ return 0;
+ }
+
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+ if (!info_ptr) {
+ png_destroy_read_struct(&png_ptr,
+ (png_infopp)NULL, (png_infopp)NULL);
+ globalErrorStream() << "libpng error: png_create_info_struct (info_ptr)\n";
+ return 0;
+ }
+
+ png_infop end_info = png_create_info_struct(png_ptr);
+ if (!end_info) {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ (png_infopp)NULL);
+ globalErrorStream() << "libpng error: png_create_info_struct (end_info)\n";
+ return 0;
+ }
+
+ // configure the read function
+ png_set_read_fn(png_ptr, (voidp)&p_fbuffer, (png_rw_ptr)&user_read_data);
+
+ if (setjmp(png_jmpbuf(png_ptr))) {
+ png_destroy_read_struct(&png_ptr, &info_ptr,
+ &end_info);
+ return 0;
+ }
+
+ png_read_info(png_ptr, info_ptr);
+
+ int bit_depth = png_get_bit_depth(png_ptr, info_ptr);
+ int color_type = png_get_color_type(png_ptr, info_ptr);
+
+ // we want to treat all images the same way
+ // The following code transforms grayscale images of less than 8 to 8 bits,
+ // changes paletted images to RGB, and adds a full alpha channel if there is
+ // transparency information in a tRNS chunk.
+
+ if (color_type == PNG_COLOR_TYPE_GRAY || color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
+ png_set_gray_to_rgb(png_ptr);
+ else if (color_type == PNG_COLOR_TYPE_PALETTE)
+ png_set_palette_to_rgb(png_ptr);
+
+ if (color_type == PNG_COLOR_TYPE_GRAY && bit_depth < 8)
+ png_set_expand_gray_1_2_4_to_8(png_ptr);
+
+ if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
+ png_set_tRNS_to_alpha(png_ptr);
+
+ if ( ! ( color_type & PNG_COLOR_MASK_ALPHA ) ) {
+ // Set the background color to draw transparent and alpha images over.
+ png_color_16 my_background, *image_background;
+
+ if (png_get_bKGD(png_ptr, info_ptr, &image_background))
+ png_set_background(png_ptr, image_background,
+ PNG_BACKGROUND_GAMMA_FILE, 1, 1.0);
+ else
+ png_set_background(png_ptr, &my_background,
+ PNG_BACKGROUND_GAMMA_SCREEN, 0, 1.0);
+
+ // Add alpha byte after each RGB triplet
+ png_set_filler(png_ptr, 0xff, PNG_FILLER_AFTER);
+ }
+
+ // read the sucker in one chunk
+ png_read_update_info(png_ptr, info_ptr);
+
+ color_type = png_get_color_type(png_ptr, info_ptr);
+ bit_depth = png_get_bit_depth(png_ptr, info_ptr);
+
+ int width = png_get_image_width(png_ptr, info_ptr);
+ int height = png_get_image_height(png_ptr, info_ptr);
+
+ // allocate the pixel buffer, and the row pointers
+ RGBAImage* image = new RGBAImage(width, height);
+
+ row_pointers = (png_byte**) malloc((height) * sizeof(png_byte*));
+
+ int i;
+ for(i = 0; i < (height); i++)
+ row_pointers[i] = (png_byte*)(image->getRGBAPixels()) + i * 4 * (width);
+
+ // actual read
+ png_read_image(png_ptr, row_pointers);
+
+ /* read rest of file, and get additional chunks in info_ptr - REQUIRED */
+ png_read_end(png_ptr, info_ptr);
+
+ /* free up the memory structure */
+ png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
+
+ free(row_pointers);
+
+ return image;
+}
+
+Image* LoadPNG(ArchiveFile& file)
+{
+ ScopedArchiveBuffer buffer(file);
+ return LoadPNGBuff( buffer.buffer );
+}
+
+
+#include "modulesystem/singletonmodule.h"
+
+
+class ImageDependencies : public GlobalFileSystemModuleRef
+{
+};
+
+class ImagePNGAPI
+{
+ _QERPlugImageTable m_imagepng;
+public:
+ typedef _QERPlugImageTable Type;
+ STRING_CONSTANT(Name, "png");
+
+ ImagePNGAPI()
+ {
+ m_imagepng.loadImage = LoadPNG;
+ }
+ _QERPlugImageTable* getTable()
+ {
+ return &m_imagepng;
+ }
+};
+
+typedef SingletonModule<ImagePNGAPI, ImageDependencies> ImagePNGModule;
+
+ImagePNGModule g_ImagePNGModule;
+
+
+extern "C" void RADIANT_DLLEXPORT Radiant_RegisterModules(ModuleServer& server)
+{
+ initialiseModule(server);
+
+ g_ImagePNGModule.selfRegister();
+}
projects / voretournament / voretournament.git / blobdiff