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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
00032 static void PNGAPI png_my_error(png_structp png_ptr, png_const_charp message)
00033 {
00034 DEBUG(misc, 0, "[libpng] error: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
00035 longjmp(png_jmpbuf(png_ptr), 1);
00036 }
00037
00044 static void PNGAPI png_my_warning(png_structp png_ptr, png_const_charp message)
00045 {
00046 DEBUG(misc, 1, "[libpng] warning: %s - %s", message, (char *)png_get_error_ptr(png_ptr));
00047 }
00048
00052 void DisplaySplashImage()
00053 {
00054 FILE *f = FioFOpenFile(SPLASH_IMAGE_FILE, "r", BASESET_DIR);
00055 if (f == NULL) return;
00056
00057 png_byte header[8];
00058 fread(header, sizeof(png_byte), 8, f);
00059 if (png_sig_cmp(header, 0, 8) != 0) {
00060 fclose(f);
00061 return;
00062 }
00063
00064 png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, (png_voidp) NULL, png_my_error, png_my_warning);
00065
00066 if (png_ptr == NULL) {
00067 fclose(f);
00068 return;
00069 }
00070
00071 png_infop info_ptr = png_create_info_struct(png_ptr);
00072 if (info_ptr == NULL) {
00073 png_destroy_read_struct(&png_ptr, (png_infopp)NULL, (png_infopp)NULL);
00074 fclose(f);
00075 return;
00076 }
00077
00078 png_infop end_info = png_create_info_struct(png_ptr);
00079 if (end_info == NULL) {
00080 png_destroy_read_struct(&png_ptr, &info_ptr, (png_infopp)NULL);
00081 fclose(f);
00082 return;
00083 }
00084
00085 if (setjmp(png_jmpbuf(png_ptr))) {
00086 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00087 fclose(f);
00088 return;
00089 }
00090
00091 png_init_io(png_ptr, f);
00092 png_set_sig_bytes(png_ptr, 8);
00093
00094 png_read_png(png_ptr, info_ptr, PNG_TRANSFORM_IDENTITY, NULL);
00095
00096 uint width = png_get_image_width(png_ptr, info_ptr);
00097 uint height = png_get_image_height(png_ptr, info_ptr);
00098 uint bit_depth = png_get_bit_depth(png_ptr, info_ptr);
00099 uint color_type = png_get_color_type(png_ptr, info_ptr);
00100
00101 if (color_type != PNG_COLOR_TYPE_PALETTE || bit_depth != 8) {
00102 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00103 fclose(f);
00104 return;
00105 }
00106
00107 if (!png_get_valid(png_ptr, info_ptr, PNG_INFO_PLTE)) {
00108 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00109 fclose(f);
00110 return;
00111 }
00112
00113 png_colorp palette;
00114 int num_palette;
00115 png_get_PLTE(png_ptr, info_ptr, &palette, &num_palette);
00116
00117 png_bytep *row_pointers = png_get_rows(png_ptr, info_ptr);
00118
00119 if (width > (uint) _screen.width) width = _screen.width;
00120 if (height > (uint) _screen.height) height = _screen.height;
00121
00122 uint xoff = (_screen.width - width) / 2;
00123 uint yoff = (_screen.height - height) / 2;
00124
00125 switch (BlitterFactoryBase::GetCurrentBlitter()->GetScreenDepth()) {
00126 case 8: {
00127 uint8 *dst_ptr = (uint8 *)_screen.dst_ptr;
00128
00129 MemSetT(dst_ptr, 0xff, _screen.pitch * _screen.height);
00130
00131 for (uint y = 0; y < height; y++) {
00132 uint8 *src = row_pointers[y];
00133 uint8 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
00134
00135 memcpy(dst, src, width);
00136 }
00137
00138 for (int i = 0; i < num_palette; i++) {
00139 _cur_palette[i].a = i == 0 ? 0 : 0xff;
00140 _cur_palette[i].r = palette[i].red;
00141 _cur_palette[i].g = palette[i].green;
00142 _cur_palette[i].b = palette[i].blue;
00143 }
00144
00145 _cur_palette[0xff].a = 0xff;
00146 _cur_palette[0xff].r = 0;
00147 _cur_palette[0xff].g = 0;
00148 _cur_palette[0xff].b = 0;
00149
00150 _pal_first_dirty = 0;
00151 _pal_count_dirty = 256;
00152 break;
00153 }
00154 case 32: {
00155 uint32 *dst_ptr = (uint32 *)_screen.dst_ptr;
00156
00157 MemSetT(dst_ptr, 0, _screen.pitch * _screen.height);
00158
00159 for (uint y = 0; y < height; y++) {
00160 uint8 *src = row_pointers[y];
00161 uint32 *dst = dst_ptr + (yoff + y) * _screen.pitch + xoff;
00162
00163 for (uint x = 0; x < width; x++) {
00164 dst[x] = palette[src[x]].blue | (palette[src[x]].green << 8) | (palette[src[x]].red << 16) | 0xff000000;
00165 }
00166 }
00167 break;
00168 }
00169 }
00170
00171 png_destroy_read_struct(&png_ptr, &info_ptr, &end_info);
00172 fclose(f);
00173 return;
00174 }
00175
00176
00177
00178 #else
00179
00183 void DisplaySplashImage() {}
00184
00185 #endif