accelerants/neomagic/Overlay.c

12 /* define the supported overlay input colorspaces */
26 	/* apparantly overlay count should report the number of 'overlay units' on the card */
76 	AQUIRE_BEN(si->overlay.lock)
85 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
99 						si->overlay.myBuffer[offset].width = width;
103 						si->overlay.myBuffer[offset].width = (width & ~0x0007) + 8;
105 					si->overlay.myBuffer[offset].bytes_per_row = 2 * si->overlay.myBuffer[offset].width;
109 					if (si->overlay.myBuffer[offset].width > 2048)
114 						RELEASE_BEN(si->overlay.lock)
124 					RELEASE_BEN(si->overlay.lock)
131 		if (si->overlay.myBuffer[offset].width > 1024)
136 			RELEASE_BEN(si->overlay.lock)
146 			RELEASE_BEN(si->overlay.lock)
151 		/* store slopspace (in pixels) for each bitmap for use by 'overlay unit' (BES) */
152 		si->overlay.myBufInfo[offset].slopspace = si->overlay.myBuffer[offset].width - width;
154 		si->overlay.myBuffer[offset].space = cs;
155 		si->overlay.myBuffer[offset].height = height;
157 		/* we define the overlay buffers to reside 'in the back' of the cards RAM */
159 		 * Beware that an app using overlay needs to track workspace switches and screenprefs
161 		 * newly created overlay bitmaps, which will be assigned by BeOS automatically after such
167 		 * and if this happens, it needs to fallback to single buffered overlay or even fallback to
171 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
180 		 * free space:      - used for overlay,
187 		oldsize = si->overlay.myBufInfo[offset].size;
188 		si->overlay.myBufInfo[offset].size =
189 			si->overlay.myBuffer[offset].bytes_per_row * si->overlay.myBuffer[offset].height;
198 			adress -= si->overlay.myBufInfo[cnt].size;
211 			si->overlay.myBufInfo[offset].size += (temp32 - (temp32 & 0xfffffff0));
223 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
225 		 * space in between your overlay buffers for instance, so cardRAM is used 'to the max'.
232 			if (si->overlay.myBuffer[cnt].buffer != NULL)
235 				if (si->overlay.myBufInfo[offset].size <= oldsize)
239 					adress -= (oldsize - si->overlay.myBufInfo[offset].size);
240 					si->overlay.myBufInfo[offset].size = oldsize;
253 					si->overlay.myBufInfo[offset].size = oldsize;
256 					RELEASE_BEN(si->overlay.lock)
264 		 * (preventing overlap of desktop RAMspace & overlay bitmap RAMspace here) */
271 			RELEASE_BEN(si->overlay.lock)
276 		si->overlay.myBuffer[offset].buffer = (void *) adress;
284 			adress -= si->overlay.myBufInfo[cnt].size;
287 		si->overlay.myBuffer[offset].buffer_dma = (void *) adress;
290 			(uint32)((uint8*)si->overlay.myBuffer[offset].buffer),
291 			(uint32)((uint8*)si->overlay.myBuffer[offset].buffer_dma), cs));
292 		LOG(4,("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
295 		RELEASE_BEN(si->overlay.lock)
297 		return &si->overlay.myBuffer[offset];
305 		RELEASE_BEN(si->overlay.lock)
321 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
327 			si->overlay.myBuffer[offset].buffer = NULL;
328 			si->overlay.myBuffer[offset].buffer_dma = NULL;
368 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
452 	AQUIRE_BEN(si->overlay.lock)
454 	/* overlay unit already in use? */
455 	if (si->overlay.myToken == NULL)
456 	/* overlay unit is available */
460 		si->overlay.myToken = &tmpToken;
463 		RELEASE_BEN(si->overlay.lock)
465 		return si->overlay.myToken;
468 	/* sorry, overlay unit is occupied */
473 		RELEASE_BEN(si->overlay.lock)
484 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
499 		si->overlay.myToken = NULL;
512 	 * When a Workspace switch, screen prefs change, or overlay app shutdown occurs, BeOS will
513 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
527 	 * If during overlay use the screen prefs are changed, or the workspace has changed, it
528 	 * may be that we were not able to re-allocate the requested overlay buffers (or only partly)
536 		LOG(4,("no overlay buffer specified\n"));
542 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
555 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;