peter1138@2847: /* $Id$ */
bjarni@2736: 
bjarni@2736: #include "../../stdafx.h"
bjarni@2736: #include "../../openttd.h"
bjarni@2736: #include "../../variables.h"
bjarni@2736: #include "../../macros.h"
bjarni@2736: #include "../../debug.h"
bjarni@2736: #include "../../functions.h"
bjarni@2736: #include "../../gfx.h"
bjarni@2736: #include "../../fileio.h"
bjarni@2736: 
bjarni@2736: #include "splash.h"
bjarni@2736: 
bjarni@2736: #ifdef WITH_PNG
bjarni@2736: 
bjarni@2736: #include <png.h>
bjarni@2736: 
bjarni@2736: static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
bjarni@2736: {
Darkvater@5388: 	DEBUG(misc, 0, "[libpng] error: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
bjarni@2736: 	longjmp(png_ptr->jmpbuf, 1);
bjarni@2736: }
bjarni@2736: 
bjarni@2736: static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
bjarni@2736: {
Darkvater@5388: 	DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
bjarni@2736: }
bjarni@2736: 
bjarni@2736: void DisplaySplashImage(void)
bjarni@2736: {
bjarni@2736: 	png_byte header[8];
bjarni@2736: 	FILE *f;
bjarni@2736: 	png_structp png_ptr;
bjarni@2736: 	png_infop info_ptr, end_info;
bjarni@2736: 	uint width, height, bit_depth, color_type;
bjarni@2736: 	png_colorp palette;
bjarni@2736: 	int num_palette;
bjarni@2736: 	png_bytep *row_pointers;
bjarni@2736: 	uint8 *src, *dst;
bjarni@2736: 	uint y;
bjarni@2736: 	uint xoff, yoff;
bjarni@2736: 	int i;
bjarni@2736: 
bjarni@2736: 	f = FioFOpenFile(SPLASH_IMAGE_FILE);
bjarni@2736: 	if (f == NULL) return;
bjarni@2736: 
bjarni@2736: 	fread(header, 1, 8, f);
bjarni@2736: 	if (png_sig_cmp(header, 0, 8) != 0) {
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	png_ptr = png_create_read_struct (PNG_LIBPNG_VER_STRING, (png_voidp) NULL, png_my_error, png_my_warning);
bjarni@2736: 
bjarni@2736: 	if (png_ptr == NULL) {
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	info_ptr = png_create_info_struct(png_ptr);
bjarni@2736: 	if (info_ptr == NULL) {
bjarni@2736: 		png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	end_info = png_create_info_struct(png_ptr);
bjarni@2736: 	if (end_info == NULL) {
bjarni@2736: 		png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	if (setjmp(png_jmpbuf(png_ptr))) {
bjarni@2736: 		png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	png_init_io(png_ptr, f);
bjarni@2736: 	png_set_sig_bytes(png_ptr, 8);
bjarni@2736: 
bjarni@2736: 	png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
bjarni@2736: 
bjarni@2736: 	width            = png_get_image_width(png_ptr, info_ptr);
bjarni@2736: 	height           = png_get_image_height(png_ptr, info_ptr);
bjarni@2736: 	bit_depth        = png_get_bit_depth(png_ptr, info_ptr);
bjarni@2736: 	color_type       = png_get_color_type(png_ptr, info_ptr);
bjarni@2736: 
peter1138@2953: 	if (color_type != PNG_COLOR_TYPE_PALETTE || bit_depth != 8) {
bjarni@2736: 		png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
peter1138@2953: 	if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)) {
bjarni@2736: 		png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
bjarni@2736: 		fclose(f);
bjarni@2736: 		return;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
bjarni@2736: 
bjarni@2736: 	row_pointers = png_get_rows(png_ptr, info_ptr);
bjarni@2736: 
bjarni@2736: 	memset(_screen.dst_ptr, 0xff, _screen.pitch * _screen.height);
bjarni@2736: 
peter1138@2953: 	if (width > (uint) _screen.width) width = _screen.width;
peter1138@2953: 	if (height > (uint) _screen.height) height = _screen.height;
bjarni@2736: 
bjarni@2736: 	xoff = (_screen.width - width) / 2;
bjarni@2736: 	yoff = (_screen.height - height) / 2;
peter1138@2953: 	for (y = 0; y < height; y++) {
bjarni@2736: 		src = row_pointers[y];
bjarni@2736: 		dst = ((uint8 *) _screen.dst_ptr) + (yoff + y) * _screen.pitch + xoff;
bjarni@2736: 
bjarni@2736: 		memcpy(dst, src, width);
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	for (i = 0; i < num_palette; i++) {
bjarni@2736: 		_cur_palette[i].r = palette[i].red;
bjarni@2736: 		_cur_palette[i].g = palette[i].green;
bjarni@2736: 		_cur_palette[i].b = palette[i].blue;
bjarni@2736: 	}
bjarni@2736: 
bjarni@2736: 	_cur_palette[0xff].r = 0;
bjarni@2736: 	_cur_palette[0xff].g = 0;
bjarni@2736: 	_cur_palette[0xff].b = 0;
bjarni@2736: 
bjarni@2736: 	_pal_first_dirty = 0;
bjarni@2736: 	_pal_last_dirty = 0xff;
bjarni@2736: 
bjarni@2736: 	png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
bjarni@2736: 	fclose(f);
bjarni@2736: 	return;
bjarni@2736: }
bjarni@2736: 
bjarni@2736: 
bjarni@2736: 
truelight@4300: #else /* WITH_PNG */
bjarni@2736: 
bjarni@2736: void DisplaySplashImage(void) {}
bjarni@2736: 
truelight@4300: #endif /* WITH_PNG */