2 Copyright (C) 2003, 2010 - Wolfire Games
4 This file is part of Lugaru.
6 Lugaru is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 Lugaru is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Lugaru. If not, see <http://www.gnu.org/licenses/>.
20 /**> HEADER FILES <**/
30 extern ImageRec texture;
31 extern bool visibleloading;
33 /* These two are needed for screenshot */
34 extern int kContextWidth;
35 extern int kContextHeight;
37 static bool load_png(const char * fname, ImageRec & tex);
38 static bool load_jpg(const char * fname, ImageRec & tex);
39 static bool save_screenshot_png(const char * fname);
41 bool upload_image(const char* fileName)
43 return load_image(fileName, texture);
46 bool load_image(const char *file_name, ImageRec &tex)
49 Game::LoadingScreen();
51 if ( tex.data == NULL )
54 const char *ptr = strrchr((char *)file_name, '.');
56 if (strcasecmp(ptr + 1, "png") == 0)
57 return load_png(file_name, tex);
58 else if (strcasecmp(ptr + 1, "jpg") == 0)
59 return load_jpg(file_name, tex);
62 STUBBED("Unsupported image type");
66 bool save_screenshot(const char *file_name)
68 const char *ptr = strrchr((char *)file_name, '.');
70 if (strcasecmp(ptr + 1, "png") == 0)
71 return save_screenshot_png(file_name);
74 STUBBED("Unsupported image type");
79 struct jpeg_error_mgr pub; /* "public" fields */
80 jmp_buf setjmp_buffer; /* for return to caller */
82 typedef struct my_error_mgr * my_error_ptr;
84 static void my_error_exit(j_common_ptr cinfo)
86 struct my_error_mgr *err = (struct my_error_mgr *)cinfo->err;
87 longjmp(err->setjmp_buffer, 1);
90 /* stolen from public domain example.c code in libjpg distribution. */
91 static bool load_jpg(const char *file_name, ImageRec &tex)
93 struct jpeg_decompress_struct cinfo;
94 struct my_error_mgr jerr;
95 JSAMPROW buffer[1]; /* Output row buffer */
96 int row_stride; /* physical row width in output buffer */
97 FILE *infile = fopen(file_name, "rb");
102 cinfo.err = jpeg_std_error(&jerr.pub);
103 jerr.pub.error_exit = my_error_exit;
104 if (setjmp(jerr.setjmp_buffer)) {
105 jpeg_destroy_decompress(&cinfo);
110 jpeg_create_decompress(&cinfo);
111 jpeg_stdio_src(&cinfo, infile);
112 (void) jpeg_read_header(&cinfo, TRUE);
114 cinfo.out_color_space = JCS_RGB;
115 cinfo.quantize_colors = 0;
116 (void) jpeg_calc_output_dimensions(&cinfo);
117 (void) jpeg_start_decompress(&cinfo);
119 row_stride = cinfo.output_width * cinfo.output_components;
120 tex.sizeX = cinfo.output_width;
121 tex.sizeY = cinfo.output_height;
124 while (cinfo.output_scanline < cinfo.output_height) {
125 buffer[0] = (JSAMPROW)(char *)tex.data +
126 ((cinfo.output_height - 1) - cinfo.output_scanline) * row_stride;
127 (void) jpeg_read_scanlines(&cinfo, buffer, 1);
130 (void) jpeg_finish_decompress(&cinfo);
131 jpeg_destroy_decompress(&cinfo);
137 /* stolen from public domain example.c code in libpng distribution. */
138 static bool load_png(const char *file_name, ImageRec &tex)
140 bool hasalpha = false;
141 png_structp png_ptr = NULL;
142 png_infop info_ptr = NULL;
143 png_uint_32 width, height;
144 int bit_depth, color_type, interlace_type;
146 png_byte **row_pointers = NULL;
147 FILE *fp = fopen(file_name, "rb");
150 cerr << file_name << " not found" << endl;
154 png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
158 info_ptr = png_create_info_struct(png_ptr);
159 if (info_ptr == NULL)
162 if (setjmp(png_jmpbuf(png_ptr)))
165 png_init_io(png_ptr, fp);
166 png_read_png(png_ptr, info_ptr,
167 PNG_TRANSFORM_STRIP_16 | PNG_TRANSFORM_PACKING,
169 png_get_IHDR(png_ptr, info_ptr, &width, &height,
170 &bit_depth, &color_type, &interlace_type, NULL, NULL);
172 if (bit_depth != 8) // transform SHOULD handle this...
175 if (color_type & PNG_COLOR_MASK_PALETTE) // !!! FIXME?
178 if ((color_type & PNG_COLOR_MASK_COLOR) == 0) // !!! FIXME?
181 hasalpha = ((color_type & PNG_COLOR_MASK_ALPHA) != 0);
182 row_pointers = png_get_rows(png_ptr, info_ptr);
187 png_byte *dst = tex.data;
188 for (int i = height - 1; i >= 0; i--) {
189 png_byte *src = row_pointers[i];
190 for (unsigned j = 0; j < width; j++) {
202 png_byte *dst = tex.data;
203 int pitch = width * 4;
204 for (int i = height - 1; i >= 0; i--, dst += pitch)
205 memcpy(dst, row_pointers[i], pitch);
215 cerr << "There was a problem loading " << file_name << endl;
217 png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
223 static bool save_screenshot_png(const char *file_name)
226 png_structp png_ptr = NULL;
227 png_infop info_ptr = NULL;
230 fp = fopen(file_name, "wb");
234 png_bytep *row_pointers = new png_bytep[kContextHeight];
235 png_bytep screenshot = new png_byte[kContextWidth * kContextHeight * 3];
236 if ((!screenshot) || (!row_pointers))
240 glReadPixels(0, 0, kContextWidth, kContextHeight,
241 GL_RGB, GL_UNSIGNED_BYTE, screenshot);
242 if (glGetError() != GL_NO_ERROR)
245 for (int i = 0; i < kContextHeight; i++)
246 row_pointers[i] = screenshot + ((kContextWidth * ((kContextHeight - 1) - i)) * 3);
248 png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
252 info_ptr = png_create_info_struct(png_ptr);
253 if (info_ptr == NULL)
256 if (setjmp(png_jmpbuf(png_ptr)))
259 png_init_io(png_ptr, fp);
261 if (setjmp(png_jmpbuf(png_ptr)))
264 png_set_IHDR(png_ptr, info_ptr, kContextWidth, kContextHeight,
265 8, PNG_COLOR_TYPE_RGB, PNG_INTERLACE_NONE,
266 PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE);
268 png_write_info(png_ptr, info_ptr);
270 if (setjmp(png_jmpbuf(png_ptr)))
273 png_write_image(png_ptr, row_pointers);
275 if (setjmp(png_jmpbuf(png_ptr)))
278 png_write_end(png_ptr, NULL);
282 png_destroy_write_struct(&png_ptr, &info_ptr);
284 delete[] row_pointers;
288 unlink(ConvertFileName(file_name));