--- a/rwimg/rwpng.c +++ b/rwimg/rwpng.c @@ -42,6 +42,7 @@ open_png_file_reading (const char *filename, int *width, int *height) { png_data_t *data = (png_data_t*)malloc(sizeof(png_data_t)); + int _bit_depth,_color_type,_interlace_type,_compression,_filter; assert(data != 0); @@ -57,19 +58,20 @@ data->end_info = png_create_info_struct(data->png_ptr); assert(data->end_info != 0); - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); png_init_io(data->png_ptr, data->file); png_read_info(data->png_ptr, data->info_ptr); - *width = data->info_ptr->width; - *height = data->info_ptr->height; - - assert(data->info_ptr->bit_depth == 8 || data->info_ptr->bit_depth == 16); - assert(data->info_ptr->color_type == PNG_COLOR_TYPE_RGB || data->info_ptr->color_type == PNG_COLOR_TYPE_RGB_ALPHA); - assert(data->info_ptr->interlace_type == PNG_INTERLACE_NONE); + png_get_IHDR(data->png_ptr,data->info_ptr, + (png_uint_32 *)width,(png_uint_32 *)height, + &_bit_depth,&_color_type,&_interlace_type,&_compression,&_filter); + + assert(_bit_depth == 8 || _bit_depth == 16); + assert(_color_type == PNG_COLOR_TYPE_RGB || _color_type == PNG_COLOR_TYPE_RGB_ALPHA); + assert(_interlace_type == PNG_INTERLACE_NONE); data->have_read = 0; @@ -83,30 +85,36 @@ int i; int bps, spp; unsigned char *row; + png_uint_32 _width,_height; + int _bit_depth,_color_type,_interlace_type,_compression,_filter; - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); - if (data->info_ptr->color_type == PNG_COLOR_TYPE_RGB) + png_get_IHDR(data->png_ptr,data->info_ptr, + &_width,&_height,&_bit_depth,&_color_type,&_interlace_type, + &_compression,&_filter); + + if (_color_type == PNG_COLOR_TYPE_RGB) spp = 3; else spp = 4; - if (data->info_ptr->bit_depth == 16) + if (_bit_depth == 16) bps = 2; else bps = 1; - row = (unsigned char*)malloc(data->info_ptr->width * spp * bps); + row = (unsigned char*)malloc(_width * spp * bps); for (i = 0; i < num_lines; ++i) { int j, channel; png_read_row(data->png_ptr, (png_bytep)row, 0); - for (j = 0; j < data->info_ptr->width; ++j) + for (j = 0; j < _width; ++j) for (channel = 0; channel < 3; ++channel) - lines[i * data->info_ptr->width * 3 + j * 3 + channel] = row[j * spp * bps + channel * bps]; + lines[i * _width * 3 + j * 3 + channel] = row[j * spp * bps + channel * bps]; } free(row); @@ -119,7 +127,7 @@ { png_data_t *data = (png_data_t*)_data; - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); if (data->have_read) @@ -148,7 +156,7 @@ data->info_ptr = png_create_info_struct(data->png_ptr); assert(data->info_ptr != 0); - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); if (pixel_stride == 4) @@ -156,18 +164,14 @@ png_init_io(data->png_ptr, data->file); - data->info_ptr->width = width; - data->info_ptr->height = height; - data->info_ptr->valid = 0; + png_set_IHDR(data->png_ptr,data->info_ptr,width,height, + 8,PNG_COLOR_TYPE_RGB,PNG_INTERLACE_NONE, + PNG_COMPRESSION_TYPE_DEFAULT,PNG_FILTER_TYPE_DEFAULT); + /* setting these to 0 so just skipping ... data->info_ptr->rowbytes = width * 3; data->info_ptr->palette = 0; data->info_ptr->num_palette = 0; - data->info_ptr->num_trans = 0; - data->info_ptr->bit_depth = 8; - data->info_ptr->color_type = PNG_COLOR_TYPE_RGB; - data->info_ptr->compression_type = PNG_COMPRESSION_TYPE_DEFAULT; - data->info_ptr->filter_type = PNG_FILTER_TYPE_DEFAULT; - data->info_ptr->interlace_type = PNG_INTERLACE_NONE; + data->info_ptr->num_trans = 0; */ png_write_info(data->png_ptr, data->info_ptr); @@ -182,7 +186,7 @@ png_data_t *data = (png_data_t*)_data; int i; - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); for (i = 0; i < num_lines; ++i) @@ -194,7 +198,7 @@ { png_data_t *data = (png_data_t*)_data; - if (setjmp(data->png_ptr->jmpbuf)) + if (setjmp(png_jmpbuf(data->png_ptr))) assert(0); png_write_end(data->png_ptr, data->info_ptr);