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00012 #include "../../stdafx.h"
00013 #include "../../openttd.h"
00014 #include "../../debug.h"
00015 #include "../../gfx_func.h"
00016 #include "../../fileio_func.h"
00017 #include "../../blitter/factory.hpp"
00018 #include "../../core/mem_func.hpp"
00019
00020 #include "splash.h"
00021
00022 #ifdef WITH_PNG
00023
00024 #include <png.h>
00025
00026 static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
00027 {
00028 DEBUG(misc, 0, "[libpng] error: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
00029 longjmp(png_jmpbuf(png_ptr), 1);
00030 }
00031
00032 static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
00033 {
00034 DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
00035 }
00036
00037 void DisplaySplashImage()
00038 {
00039 FILE *f = FioFOpenFile(SPLASH_IMAGE_FILE);
00040 if (f == NULL) return;
00041
00042 png_byte header[8];
00043 fread(header, sizeof(png_byte), 8, f);
00044 if (png_sig_cmp(header, 0, 8) != 0) {
00045 fclose(f);
00046 return;
00047 }
00048
00049 png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp) NULL, png_my_error, png_my_warning);
00050
00051 if (png_ptr == NULL) {
00052 fclose(f);
00053 return;
00054 }
00055
00056 png_infop info_ptr = png_create_info_struct(png_ptr);
00057 if (info_ptr == NULL) {
00058 png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
00059 fclose(f);
00060 return;
00061 }
00062
00063 png_infop end_info = png_create_info_struct(png_ptr);
00064 if (end_info == NULL) {
00065 png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
00066 fclose(f);
00067 return;
00068 }
00069
00070 if (setjmp(png_jmpbuf(png_ptr))) {
00071 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00072 fclose(f);
00073 return;
00074 }
00075
00076 png_init_io(png_ptr, f);
00077 png_set_sig_bytes(png_ptr, 8);
00078
00079 png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
00080
00081 uint width = png_get_image_width(png_ptr, info_ptr);
00082 uint height = png_get_image_height(png_ptr, info_ptr);
00083 uint bit_depth = png_get_bit_depth(png_ptr, info_ptr);
00084 uint color_type = png_get_color_type(png_ptr, info_ptr);
00085
00086 if (color_type != PNG_COLOR_TYPE_PALETTE || bit_depth != 8) {
00087 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00088 fclose(f);
00089 return;
00090 }
00091
00092 if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)) {
00093 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00094 fclose(f);
00095 return;
00096 }
00097
00098 png_colorp palette;
00099 int num_palette;
00100 png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
00101
00102 png_bytep *row_pointers = png_get_rows(png_ptr, info_ptr);
00103
00104 if (width > (uint) _screen.width) width = _screen.width;
00105 if (height > (uint) _screen.height) height = _screen.height;
00106
00107 uint xoff = (_screen.width - width) / 2;
00108 uint yoff = (_screen.height - height) / 2;
00109
00110 switch (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth()) {
00111 case 8: {
00112 uint8 *dst_ptr = (uint8 *)_screen.dst_ptr;
00113
00114 MemSetT(dst_ptr, 0xff, _screen.pitch * _screen.height);
00115
00116 for (uint y = 0; y < height; y++) {
00117 uint8 *src = row_pointers[y];
00118 uint8 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
00119
00120 memcpy(dst, src, width);
00121 }
00122
00123 for (int i = 0; i < num_palette; i++) {
00124 _cur_palette[i].a = i == 0 ? 0 : 0xff;
00125 _cur_palette[i].r = palette[i].red;
00126 _cur_palette[i].g = palette[i].green;
00127 _cur_palette[i].b = palette[i].blue;
00128 }
00129
00130 _cur_palette[0xff].a = 0xff;
00131 _cur_palette[0xff].r = 0;
00132 _cur_palette[0xff].g = 0;
00133 _cur_palette[0xff].b = 0;
00134
00135 _pal_first_dirty = 0;
00136 _pal_count_dirty = 256;
00137 break;
00138 }
00139 case 32: {
00140 uint32 *dst_ptr = (uint32 *)_screen.dst_ptr;
00141
00142 MemSetT(dst_ptr, 0, _screen.pitch * _screen.height);
00143
00144 for (uint y = 0; y < height; y++) {
00145 uint8 *src = row_pointers[y];
00146 uint32 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
00147
00148 for (uint x = 0; x < width; x++) {
00149 dst[x] = palette[src[x]].blue | (palette[src[x]].green << 8) | (palette[src[x]].red << 16) | 0xff000000;
00150 }
00151 }
00152 break;
00153 }
00154 }
00155
00156 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00157 fclose(f);
00158 return;
00159 }
00160
00161
00162
00163 #else
00164
00165 void DisplaySplashImage() {}
00166
00167 #endif