accelerants/nvidia/Overlay.c

75 	int offset = 0;					/* used to determine next buffer to create */
76 	uintptr_t adress, adress2, temp32;	/* used to calculate buffer adresses */
87 	/* find first empty slot (room for another buffer?) */
90 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
96 	/* setup new scaler input buffer */
117 						LOG(4, ("Overlay: Sorry, requested buffer pitch not supported, aborted\n"));
142 			/* check if the requested buffer width is supported */
144 				LOG(4, ("Overlay: Sorry, requested buffer width not supported, aborted\n"));
150 			/* check if the requested buffer height is supported */
152 				LOG(4, ("Overlay: Sorry, requested buffer height not supported, aborted\n"));
162 			/* check if the requested buffer width is supported */
164 				LOG(4, ("Overlay: Sorry, requested buffer width not supported, aborted\n"));
170 			/* check if the requested buffer height is supported */
172 				LOG(4, ("Overlay: Sorry, requested buffer height not supported, aborted\n"));
201 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
202 		 * cardRAM is that apps that try to write beyond the buffer's space get a segfault immediately.
215 		/* calculate 'preliminary' buffer size including slopspace */
258 		LOG(4, ("Overlay: new buffer needs virtual adress $%08x\n", adress));
260 		/* First check now if buffer to be defined is 'last one' in memory (speaking backwards):
261 		 * this is done to prevent a large buffer getting created in the space a small buffer
266 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
269 		 * If you don't, you might not get a buffer at all if you are trying to set up a larger one
275 			if (si->overlay.myBuffer[cnt].buffer != NULL)
277 				/* Check if the new buffer would fit into the space the single old one used here */
284 					LOG(4,("Overlay: 'squeezing' in buffer:\n"
290 					LOG(4, ("Overlay: Other buffer(s) exist after this one:\n"
316 		/* continue buffer setup */
317 		si->overlay.myBuffer[offset].buffer = (void *) adress;
335 		LOG(4, ("Overlay: New buffer: addr $%p, dma_addr $%p, color space $%08x\n",
336 			(uint8*)si->overlay.myBuffer[offset].buffer,
338 		LOG(4, ("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
363 		/* find the buffer */
366 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
370 		/* delete current buffer */
372 			si->overlay.myBuffer[offset].buffer = NULL;
375 			LOG(4,("Overlay: Release_buffer offset = %d, buffer released\n",offset));
381 			/* this is no buffer of ours! */
388 	/* no buffer specified! */
390 		LOG(4,("Overlay: Release_overlay_buffer: no buffer specified, aborted!\n"));
410 	/* find the buffer */
413 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
428 						 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
434 						 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
508 		/* this is no buffer of ours! */
509 		LOG(4,("Overlay: Get_overlay_constraints: buffer is not ours, aborted!\n"));
579 	int offset = 0; /* used for buffer index */
585 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
604 	 * The app will probably crash because it will want to write into this non-existant buffer
608 		LOG(4,("no overlay buffer specified\n"));
624 		/* find the buffer's offset */
627 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
632 			LOG(4,("succesfull, switching to buffer %d\n", offset));
641 			/* this is no buffer of ours! */
642 			LOG(4,("buffer is not ours, aborted!\n"));