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1.1 root 1: /*
1.1.1.5 root 2: Hatari - screenSnapShot.c
1.1 root 3:
1.1.1.14 root 4: This file is distributed under the GNU General Public License, version 2
5: or at your option any later version. Read the file gpl.txt for details.
1.1.1.5 root 6:
7: Screen Snapshots.
1.1 root 8: */
1.1.1.11 root 9: const char ScreenSnapShot_fileid[] = "Hatari screenSnapShot.c : " __DATE__ " " __TIME__;
1.1 root 10:
1.1.1.2 root 11: #include <SDL.h>
12: #include <dirent.h>
13: #include <string.h>
1.1 root 14: #include "main.h"
1.1.1.13 root 15: #include "configuration.h"
1.1.1.6 root 16: #include "log.h"
1.1.1.8 root 17: #include "paths.h"
1.1 root 18: #include "screen.h"
19: #include "screenSnapShot.h"
1.1.1.13 root 20: #include "statusbar.h"
1.1 root 21: #include "video.h"
1.1.1.9 root 22: /* after above that bring in config.h */
23: #if HAVE_LIBPNG
24: # include <png.h>
25: # include <assert.h>
1.1.1.12 root 26: # include "pixel_convert.h" /* inline functions */
1.1.1.9 root 27: #endif
1.1 root 28:
1.1.1.2 root 29:
1.1.1.6 root 30: static int nScreenShots = 0; /* Number of screen shots saved */
31:
1.1 root 32:
1.1.1.2 root 33: /*-----------------------------------------------------------------------*/
1.1.1.8 root 34: /**
35: * Scan working directory to get the screenshot number
36: */
1.1.1.5 root 37: static void ScreenSnapShot_GetNum(void)
38: {
1.1.1.8 root 39: char dummy[5];
40: int i, num;
41: DIR *workingdir = opendir(Paths_GetWorkingDir());
42: struct dirent *file;
43:
44: nScreenShots = 0;
45: if (workingdir == NULL) return;
46:
47: file = readdir(workingdir);
48: while (file != NULL)
49: {
50: if ( strncmp("grab", file->d_name, 4) == 0 )
51: {
52: /* copy next 4 numbers */
53: for (i = 0; i < 4; i++)
54: {
55: if (file->d_name[4+i] >= '0' && file->d_name[4+i] <= '9')
56: dummy[i] = file->d_name[4+i];
57: else
58: break;
59: }
60:
61: dummy[i] = '\0'; /* null terminate */
62: num = atoi(dummy);
63: if (num > nScreenShots) nScreenShots = num;
64: }
65: /* next file.. */
66: file = readdir(workingdir);
67: }
68:
69: closedir(workingdir);
1.1.1.2 root 70: }
71:
1.1.1.8 root 72:
1.1.1.9 root 73: #if HAVE_LIBPNG
1.1.1.8 root 74: /**
1.1.1.12 root 75: * Save given SDL surface as PNG. Return png file size > 0 for success.
1.1.1.9 root 76: */
1.1.1.12 root 77: static int ScreenSnapShot_SavePNG(SDL_Surface *surface, const char *filename)
1.1.1.9 root 78: {
1.1.1.12 root 79: FILE *fp = NULL;
1.1.1.13 root 80: int ret, bottom;
1.1.1.12 root 81:
82: fp = fopen(filename, "wb");
83: if (!fp)
84: return -1;
1.1.1.9 root 85:
1.1.1.13 root 86: if (ConfigureParams.Screen.bCrop)
87: bottom = Statusbar_GetHeight();
88: else
89: bottom = 0;
90:
91: /* default compression/filter and configured cropping */
92: ret = ScreenSnapShot_SavePNG_ToFile(surface, fp, -1, -1, 0, 0, 0, bottom);
1.1.1.9 root 93:
1.1.1.12 root 94: fclose (fp);
95: return ret; /* >0 if OK, -1 if error */
1.1.1.9 root 96: }
97:
1.1.1.12 root 98:
1.1.1.9 root 99: /**
1.1.1.12 root 100: * Save given SDL surface as PNG in an already opened FILE, eventually cropping some borders.
101: * Return png file size > 0 for success.
102: * This function is also used by avi_record.c to save individual frames as png images.
1.1.1.9 root 103: */
1.1.1.12 root 104: int ScreenSnapShot_SavePNG_ToFile(SDL_Surface *surface, FILE *fp, int png_compression_level, int png_filter ,
105: int CropLeft , int CropRight , int CropTop , int CropBottom )
1.1.1.9 root 106: {
1.1.1.12 root 107: bool do_lock;
1.1.1.16! root 108: int y, ret;
1.1.1.12 root 109: int w = surface->w - CropLeft - CropRight;
110: int h = surface->h - CropTop - CropBottom;
1.1.1.13 root 111: Uint8 *src_ptr;
1.1.1.9 root 112: Uint8 rowbuf[3*surface->w];
113: SDL_PixelFormat *fmt = surface->format;
114: png_infop info_ptr = NULL;
115: png_structp png_ptr;
116: png_text pngtext;
117: char key[] = "Title";
118: char text[] = "Hatari screenshot";
1.1.1.12 root 119: long start;
1.1.1.9 root 120:
121: /* Create and initialize the png_struct with error handler functions. */
122: png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
123: if (!png_ptr)
124: {
1.1.1.16! root 125: return -1;
1.1.1.9 root 126: }
127:
128: /* Allocate/initialize the image information data. */
129: info_ptr = png_create_info_struct(png_ptr);
1.1.1.16! root 130: if (!info_ptr) {
! 131: ret = -1;
1.1.1.9 root 132: goto png_cleanup;
1.1.1.16! root 133: }
1.1.1.9 root 134:
135: /* libpng ugliness: Set error handling when not supplying own
136: * error handling functions in the png_create_write_struct() call.
137: */
1.1.1.16! root 138: if (setjmp(png_jmpbuf(png_ptr))) {
! 139: ret = -1;
1.1.1.9 root 140: goto png_cleanup;
1.1.1.16! root 141: }
1.1.1.9 root 142:
1.1.1.12 root 143: /* store current pos in fp (could be != 0 for avi recording) */
144: start = ftell ( fp );
1.1.1.9 root 145:
146: /* initialize the png structure */
147: png_init_io(png_ptr, fp);
148:
149: /* image data properties */
150: png_set_IHDR(png_ptr, info_ptr, w, h, 8, PNG_COLOR_TYPE_RGB,
151: PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT,
152: PNG_FILTER_TYPE_DEFAULT);
1.1.1.12 root 153:
154: if ( png_compression_level >= 0 )
155: png_set_compression_level ( png_ptr , png_compression_level );
156: if ( png_filter >= 0 )
157: png_set_filter ( png_ptr , 0 , png_filter );
158:
1.1.1.9 root 159: /* image info */
160: pngtext.key = key;
161: pngtext.text = text;
162: pngtext.compression = PNG_TEXT_COMPRESSION_NONE;
163: #ifdef PNG_iTXt_SUPPORTED
164: pngtext.lang = NULL;
165: #endif
166: png_set_text(png_ptr, info_ptr, &pngtext, 1);
167:
168: /* write the file header information */
169: png_write_info(png_ptr, info_ptr);
170:
1.1.1.12 root 171: /* write surface data rows one at a time (after cropping if necessary) */
172: src_ptr = (Uint8 *)surface->pixels + CropTop * surface->pitch + CropLeft * surface->format->BytesPerPixel;
173: do_lock = SDL_MUSTLOCK(surface);
1.1.1.9 root 174: for (y = 0; y < h; y++) {
1.1.1.12 root 175: /* need to lock the surface while accessing it directly */
176: if (do_lock)
177: SDL_LockSurface(surface);
1.1.1.9 root 178: switch (fmt->BytesPerPixel) {
179: case 1:
180: /* unpack 8-bit data with RGB palette */
1.1.1.13 root 181: PixelConvert_8to24Bits(rowbuf, src_ptr, w, fmt->palette->colors);
1.1.1.9 root 182: break;
183: case 2:
184: /* unpack 16-bit RGB pixels */
1.1.1.13 root 185: PixelConvert_16to24Bits(rowbuf, (Uint16*)src_ptr, w, fmt);
1.1.1.9 root 186: break;
187: case 3:
188: /* PNG can handle 24-bits */
189: break;
190: case 4:
191: /* unpack 32-bit RGBA pixels */
1.1.1.13 root 192: PixelConvert_32to24Bits(rowbuf, (Uint32*)src_ptr, w, fmt);
1.1.1.9 root 193: break;
194: }
1.1.1.12 root 195: /* and unlock surface before syscalls */
196: if (do_lock)
197: SDL_UnlockSurface(surface);
1.1.1.9 root 198: src_ptr += surface->pitch;
199: png_write_row(png_ptr, rowbuf);
200: }
1.1.1.12 root 201:
1.1.1.9 root 202: /* write the additional chuncks to the PNG file */
203: png_write_end(png_ptr, info_ptr);
204:
1.1.1.12 root 205: ret = ftell ( fp ) - start; /* size of the png image */
1.1.1.9 root 206: png_cleanup:
207: if (png_ptr)
208: png_destroy_write_struct(&png_ptr, NULL);
209: return ret;
210: }
211: #endif
212:
213:
214: /*-----------------------------------------------------------------------*/
215: /**
1.1.1.11 root 216: * Save screen shot file with filename like 'grab0000.[png|bmp]',
217: * 'grab0001.[png|bmp]', etc... Whether screen shots are saved as BMP
218: * or PNG depends on Hatari configuration.
1.1.1.8 root 219: */
1.1 root 220: void ScreenSnapShot_SaveScreen(void)
221: {
1.1.1.8 root 222: char *szFileName = malloc(FILENAME_MAX);
1.1.1.6 root 223:
1.1.1.8 root 224: if (!szFileName) return;
1.1.1.5 root 225:
1.1.1.8 root 226: ScreenSnapShot_GetNum();
227: /* Create our filename */
228: nScreenShots++;
1.1.1.9 root 229: #if HAVE_LIBPNG
230: /* try first PNG */
231: sprintf(szFileName,"%s/grab%4.4d.png", Paths_GetWorkingDir(), nScreenShots);
1.1.1.12 root 232: if (ScreenSnapShot_SavePNG(sdlscrn, szFileName) > 0)
1.1.1.9 root 233: {
234: fprintf(stderr, "Screen dump saved to: %s\n", szFileName);
235: free(szFileName);
236: return;
237: }
238: #endif
1.1.1.8 root 239: sprintf(szFileName,"%s/grab%4.4d.bmp", Paths_GetWorkingDir(), nScreenShots);
240: if (SDL_SaveBMP(sdlscrn, szFileName))
241: fprintf(stderr, "Screen dump failed!\n");
242: else
243: fprintf(stderr, "Screen dump saved to: %s\n", szFileName);
1.1.1.5 root 244:
1.1.1.8 root 245: free(szFileName);
1.1 root 246: }
247:
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