accelerants/skeleton/Overlay.c

12 /* define the supported overlay input colorspaces */
28 	/* apparantly overlay count should report the number of 'overlay units' on the card */
79 	AQUIRE_BEN(si->overlay.lock)
88 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
102 						si->overlay.myBuffer[offset].width = ((width + 0x000f) & ~0x000f);
109 						si->overlay.myBuffer[offset].width = ((width + 0x001f) & ~0x001f);
111 					si->overlay.myBuffer[offset].bytes_per_row = 2 * si->overlay.myBuffer[offset].width;
115 					if (si->overlay.myBuffer[offset].width > 4088)
120 						RELEASE_BEN(si->overlay.lock)
130 					RELEASE_BEN(si->overlay.lock)
137 		if (si->overlay.myBuffer[offset].width > 1024)
142 			RELEASE_BEN(si->overlay.lock)
152 			RELEASE_BEN(si->overlay.lock)
157 		/* store slopspace (in pixels) for each bitmap for use by 'overlay unit' (BES) */
158 		si->overlay.myBufInfo[offset].slopspace = si->overlay.myBuffer[offset].width - width;
160 		si->overlay.myBuffer[offset].space = cs;
161 		si->overlay.myBuffer[offset].height = height;
163 		/* we define the overlay buffers to reside 'in the back' of the cards RAM */
165 		 * Beware that an app using overlay needs to track workspace switches and screenprefs
167 		 * newly created overlay bitmaps, which will be assigned by BeOS automatically after such
173 		 * and if this happens, it needs to fallback to single buffered overlay or even fallback to
177 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
192 		oldsize = si->overlay.myBufInfo[offset].size;
193 		si->overlay.myBufInfo[offset].size =
194 			si->overlay.myBuffer[offset].bytes_per_row * si->overlay.myBuffer[offset].height;
199 		 * that do not have enough cardRAM left for allocation of overlay bitmaps, you need a card with
205 		 * bitmap output or maybe single buffered overlay output if small bitmaps are used. */
210 			adress -= si->overlay.myBufInfo[cnt].size;
223 			si->overlay.myBufInfo[offset].size += (temp32 - (temp32 & 0xfffffff0));
235 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
237 		 * space in between your overlay buffers for instance, so cardRAM is used 'to the max'.
244 			if (si->overlay.myBuffer[cnt].buffer != NULL)
247 				if (si->overlay.myBufInfo[offset].size <= oldsize)
251 					adress -= (oldsize - si->overlay.myBufInfo[offset].size);
252 					si->overlay.myBufInfo[offset].size = oldsize;
265 					si->overlay.myBufInfo[offset].size = oldsize;
268 					RELEASE_BEN(si->overlay.lock)
276 		 * (preventing overlap of desktop RAMspace & overlay bitmap RAMspace here) */
283 			RELEASE_BEN(si->overlay.lock)
288 		si->overlay.myBuffer[offset].buffer = (void *) adress;
294 			adress -= si->overlay.myBufInfo[cnt].size;
297 		si->overlay.myBuffer[offset].buffer_dma = (void *) adress;
300 			(uint32)((uint8*)si->overlay.myBuffer[offset].buffer),
301 			(uint32)((uint8*)si->overlay.myBuffer[offset].buffer_dma), cs));
302 		LOG(4,("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
305 		RELEASE_BEN(si->overlay.lock)
307 		return &si->overlay.myBuffer[offset];
315 		RELEASE_BEN(si->overlay.lock)
331 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
337 			si->overlay.myBuffer[offset].buffer = NULL;
338 			si->overlay.myBuffer[offset].buffer_dma = NULL;
378 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
489 	AQUIRE_BEN(si->overlay.lock)
491 	/* overlay unit already in use? */
492 	if (si->overlay.myToken == NULL)
493 	/* overlay unit is available */
497 		si->overlay.myToken = &tmpToken;
500 		RELEASE_BEN(si->overlay.lock)
502 		return si->overlay.myToken;
505 	/* sorry, overlay unit is occupied */
510 		RELEASE_BEN(si->overlay.lock)
521 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
536 		si->overlay.myToken = NULL;
549 	 * When a Workspace switch, screen prefs change, or overlay app shutdown occurs, BeOS will
550 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
564 	 * If during overlay use the screen prefs are changed, or the workspace has changed, it
565 	 * may be that we were not able to re-allocate the requested overlay buffers (or only partly)
573 		LOG(4,("no overlay buffer specified\n"));
579 	if ((ot == NULL) || (si->overlay.myToken == NULL) || (ot != si->overlay.myToken))
592 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
599 			/* program overlay hardware */