+
+ // This ImageSize stuff is a temporary hack
+ // should probably use 128x128 tile size and
+ // support any image size
+
+ // This should be a requester to get multiplier from user
+ int multiplier = 3;
+ int width = fgGetInt("/sim/startup/xsize");
+ int height = fgGetInt("/sim/startup/ysize");
+
+ /* allocate buffer large enough to store one tile */
+ GLubyte *tile = (GLubyte *)malloc(width * height * 3 * sizeof(GLubyte));
+ if (!tile) {
+ printf("Malloc of tile buffer failed!\n");
+ return;
+ }
+
+ int imageWidth = multiplier*width;
+ int imageHeight = multiplier*height;
+
+ /* allocate buffer to hold a row of tiles */
+ GLubyte *buffer
+ = (GLubyte *)malloc(imageWidth * height * 3 * sizeof(GLubyte));
+ if (!buffer) {
+ free(tile);
+ printf("Malloc of tile row buffer failed!\n");
+ return;
+ }
+ TRcontext *tr = trNew();
+ trTileSize(tr, width, height, 0);
+ trTileBuffer(tr, GL_RGB, GL_UNSIGNED_BYTE, tile);
+ trImageSize(tr, imageWidth, imageHeight);
+ trRowOrder(tr, TR_TOP_TO_BOTTOM);
+ sgFrustum *frustum = ssgGetFrustum();
+ trFrustum(tr,
+ frustum->getLeft(), frustum->getRight(),
+ frustum->getBot(), frustum->getTop(),
+ frustum->getNear(), frustum->getFar());
+
+ /* Prepare ppm output file */
+ while (count < 1000) {
+ snprintf(filename, 24, "fgfs-screen-%03d.ppm", count++);
+ if ( (f = fopen(filename, "r")) == NULL )
+ break;
+ fclose(f);
+ }
+ f = fopen(filename, "wb");
+ if (!f) {
+ printf("Couldn't open image file: %s\n", filename);
+ free(buffer);
+ free(tile);
+ return;
+ }
+ fprintf(f,"P6\n");
+ fprintf(f,"# ppm-file created by %s\n", "trdemo2");
+ fprintf(f,"%i %i\n", imageWidth, imageHeight);
+ fprintf(f,"255\n");
+
+ /* just to be safe... */
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+
+ /* Because the HUD and Panel change the ViewPort we will
+ * need to handle some lowlevel stuff ourselves */
+ int ncols = trGet(tr, TR_COLUMNS);
+ int nrows = trGet(tr, TR_ROWS);
+
+ bool do_hud = fgGetBool("/sim/hud/visibility");
+ GLfloat hud_col_step = 640.0 / ncols;
+ GLfloat hud_row_step = 480.0 / nrows;
+
+ bool do_panel = fgPanelVisible();
+ GLfloat panel_col_step = current_panel->getWidth() / ncols;
+ GLfloat panel_row_step = current_panel->getHeight() / nrows;
+
+ /* Draw tiles */
+ int more = 1;
+ while (more) {
+ trBeginTile(tr);
+ int curColumn = trGet(tr, TR_CURRENT_COLUMN);
+ int curRow = trGet(tr, TR_CURRENT_ROW);
+ trRenderFrame();
+ if ( do_hud )
+ fgUpdateHUD( curColumn*hud_col_step, curRow*hud_row_step,
+ (curColumn+1)*hud_col_step, (curRow+1)*hud_row_step );
+ if (do_panel)
+ current_panel->update( curColumn*panel_col_step, panel_col_step,
+ curRow*panel_row_step, panel_row_step );
+ more = trEndTile(tr);
+
+ /* save tile into tile row buffer*/
+ int curTileWidth = trGet(tr, TR_CURRENT_TILE_WIDTH);
+ int bytesPerImageRow = imageWidth * 3*sizeof(GLubyte);
+ int bytesPerTileRow = (width) * 3*sizeof(GLubyte);
+ int xOffset = curColumn * bytesPerTileRow;
+ int bytesPerCurrentTileRow = (curTileWidth) * 3*sizeof(GLubyte);
+ int i;
+ for (i=0;i<height;i++) {
+ memcpy(buffer + i*bytesPerImageRow + xOffset, /* Dest */
+ tile + i*bytesPerTileRow, /* Src */
+ bytesPerCurrentTileRow); /* Byte count*/