accelerants/matrox/Overlay.c

81 	int offset = 0;					/* used to determine next buffer to create */
82 	uintptr_t adress, adress2, temp32;	/* used to calculate buffer adresses */
93 	/* find first empty slot (room for another buffer?) */
96 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
102 	/* setup new scaler input buffer */
128 						LOG(4,("Overlay: Sorry, requested buffer pitch not supported, aborted\n"));
158 						LOG(4,("Overlay: Sorry, requested buffer pitch not supported, aborted\n");
178 		/* check if the requested buffer width is supported */
181 				LOG(4,("Overlay: Sorry, requested buffer width not supported, aborted\n"));
189 			/* check if the requested buffer height is supported */
191 				LOG(4,("Overlay: Sorry, requested buffer height not supported, aborted\n"));
200 				LOG(4,("Overlay: Sorry, requested buffer width not supported, aborted\n"));
208 			/* check if the requested buffer height is supported */
210 				LOG(4,("Overlay: Sorry, requested buffer height not supported, aborted\n"));
239 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
240 		 * cardRAM is that apps that try to write beyond the buffer's space get a segfault immediately.
253 		/* calculate 'preliminary' buffer size including slopspace */
289 		LOG(4,("Overlay: new buffer needs virtual adress $%08x\n", adress));
291 		/* First check now if buffer to be defined is 'last one' in memory (speaking backwards):
292 		 * this is done to prevent a large buffer getting created in the space a small buffer
297 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
300 		 * If you don't, you might not get a buffer at all if you are trying to set up a larger one
306 			if (si->overlay.myBuffer[cnt].buffer != NULL)
308 				/* Check if the new buffer would fit into the space the single old one used here */
315 					LOG(4,("Overlay: 'squeezing' in buffer:\n"
323 					LOG(4,("Overlay: Other buffer(s) exist after this one:\n"
349 		/* continue buffer setup */
350 		si->overlay.myBuffer[offset].buffer = (void *) adress;
371 		LOG(4, ("Overlay: New buffer: addr $%p, dma_addr $%p, color space $%08x\n",
372 			(uint8*)si->overlay.myBuffer[offset].buffer,
374 		LOG(4, ("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
399 		/* find the buffer */
402 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
406 		/* delete current buffer */
408 			si->overlay.myBuffer[offset].buffer = NULL;
411 			LOG(4,("Overlay: Release_buffer offset = %d, buffer released\n",offset));
417 			/* this is no buffer of ours! */
424 	/* no buffer specified! */
426 		LOG(4,("Overlay: Release_overlay_buffer: no buffer specified, aborted!\n"));
446 	/* find the buffer */
449 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
462 					 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
468 					 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
530 		/* this is no buffer of ours! */
531 		LOG(4,("Overlay: Get_overlay_constraints: buffer is not ours, aborted!\n"));
601 	int offset = 0; /* used for buffer index */
607 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
626 	 * The app will probably crash because it will want to write into this non-existant buffer
630 		LOG(4,("no overlay buffer specified\n"));
646 		/* find the buffer's offset */
649 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
654 			LOG(4,("succesfull, switching to buffer %d\n", offset));
662 			/* this is no buffer of ours! */
663 			LOG(4,("buffer is not ours, aborted!\n"));