accelerants/skeleton/Overlay.c

73 	int offset = 0;					/* used to determine next buffer to create */
74 	uint32 adress, adress2, temp32;	/* used to calculate buffer adresses */
85 	/* find first empty slot (room for another buffer?) */
88 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
94 	/* setup new scaler input buffer */
117 						LOG(4,("Overlay: Sorry, requested buffer pitch not supported, aborted\n"));
136 		/* check if the requested buffer width is supported */
139 			LOG(4,("Overlay: Sorry, requested buffer width not supported, aborted\n"));
146 		/* check if the requested buffer height is supported */
149 			LOG(4,("Overlay: Sorry, requested buffer height not supported, aborted\n"));
177 		 * A *positive* side-effect of assigning the first overlay buffer exactly at the end of the
178 		 * cardRAM is that apps that try to write beyond the buffer's space get a segfault immediately.
191 		/* calculate 'preliminary' buffer size including slopspace */
227 		LOG(4,("Overlay: new buffer needs virtual adress $%08x\n", adress));
229 		/* First check now if buffer to be defined is 'last one' in memory (speaking backwards):
230 		 * this is done to prevent a large buffer getting created in the space a small buffer
235 		 * If you are going to delete a overlay buffer you created, you should delete them *all* and
238 		 * If you don't, you might not get a buffer at all if you are trying to set up a larger one
244 			if (si->overlay.myBuffer[cnt].buffer != NULL)
246 				/* Check if the new buffer would fit into the space the single old one used here */
253 					LOG(4,("Overlay: 'squeezing' in buffer:\n"
261 					LOG(4,("Overlay: Other buffer(s) exist after this one:\n"
287 		/* continue buffer setup */
288 		si->overlay.myBuffer[offset].buffer = (void *) adress;
299 		LOG(4,("Overlay: New buffer: addr $%08x, dma_addr $%08x, color space $%08x\n",
300 			(uint32)((uint8*)si->overlay.myBuffer[offset].buffer),
302 		LOG(4,("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
328 		/* find the buffer */
331 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
335 		/* delete current buffer */
337 			si->overlay.myBuffer[offset].buffer = NULL;
340 			LOG(4,("Overlay: Release_buffer offset = %d, buffer released\n",offset));
346 			/* this is no buffer of ours! */
353 	/* no buffer specified! */
355 		LOG(4,("Overlay: Release_overlay_buffer: no buffer specified, aborted!\n"));
375 	/* find the buffer */
378 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
393 						 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
399 						 * Note: this has to be in sync with the slopspace setup during buffer allocation.. */
473 		/* this is no buffer of ours! */
474 		LOG(4,("Overlay: Get_overlay_constraints: buffer is not ours, aborted!\n"));
544 	int offset = 0; /* used for buffer index */
550 	 * release all overlay buffers. The buffer currently displayed at that moment, may need some
569 	 * The app will probably crash because it will want to write into this non-existant buffer
573 		LOG(4,("no overlay buffer specified\n"));
589 		/* find the buffer's offset */
592 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
597 			LOG(4,("succesfull, switching to buffer %d\n", offset));
606 			/* this is no buffer of ours! */
607 			LOG(4,("buffer is not ours, aborted!\n"));