accelerants/via/Overlay.c

72 	int offset = 0;					/* used to determine next buffer to create */
85 	for (offset = 0; offset < MAXBUFFERS; offset++)
87 		if (si->overlay.myBuffer[offset].buffer == NULL) break;
90 	LOG(4,("Overlay: Allocate_buffer offset = %d\n",offset));
92 	if (offset < MAXBUFFERS)
99 					si->overlay.myBuffer[offset].width = ((width + 0x0007) & ~0x0007);
100 					si->overlay.myBuffer[offset].bytes_per_row = 2 * si->overlay.myBuffer[offset].width;
104 					if (si->overlay.myBuffer[offset].width > 4088)
126 		if (si->overlay.myBuffer[offset].width > 1024)
147 		si->overlay.myBufInfo[offset].slopspace = si->overlay.myBuffer[offset].width - width;
149 		si->overlay.myBuffer[offset].space = cs;
150 		si->overlay.myBuffer[offset].height = height;
181 		oldsize = si->overlay.myBufInfo[offset].size;
182 		si->overlay.myBufInfo[offset].size =
183 			si->overlay.myBuffer[offset].bytes_per_row * si->overlay.myBuffer[offset].height;
197 		for (cnt = 0; cnt <= offset; cnt++)
202 		/* the > G200 scalers require buffers to be aligned to 16 byte pages cardRAM offset, G200 can do with
203 		 * 8 byte pages cardRAM offset. Compatible settings used, has no real downside consequences here */
206 		/* calculate 'would be' cardRAM offset */
212 			si->overlay.myBufInfo[offset].size += (temp32 - (temp32 & 0xfffffff0));
231 		for (cnt = offset; cnt < MAXBUFFERS; cnt++)
236 				if (si->overlay.myBufInfo[offset].size <= oldsize)
240 					adress -= (oldsize - si->overlay.myBufInfo[offset].size);
241 					si->overlay.myBufInfo[offset].size = oldsize;
254 					si->overlay.myBufInfo[offset].size = oldsize;
277 		si->overlay.myBuffer[offset].buffer = (void *) adress;
281 		for (cnt = 0; cnt <= offset; cnt++)
286 		si->overlay.myBuffer[offset].buffer_dma = (void *) adress;
289 			(uint8*)si->overlay.myBuffer[offset].buffer,
290 			(uint8*)si->overlay.myBuffer[offset].buffer_dma, cs));
291 		LOG(4,("Overlay: New buffer's size is $%08x\n", si->overlay.myBufInfo[offset].size));
296 		return &si->overlay.myBuffer[offset];
313 	int offset = 0;
318 		for (offset = 0; offset < MAXBUFFERS; offset++)
320 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
323 		if (offset < MAXBUFFERS)
326 			si->overlay.myBuffer[offset].buffer = NULL;
327 			si->overlay.myBuffer[offset].buffer_dma = NULL;
329 			LOG(4,("Overlay: Release_buffer offset = %d, buffer released\n",offset));
353 	int offset = 0;
365 	for (offset = 0; offset < MAXBUFFERS; offset++)
367 		if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
370 	if (offset < MAXBUFFERS)
506 	int offset = 0; /* used for buffer index */
551 		/* find the buffer's offset */
552 		for (offset = 0; offset < MAXBUFFERS; offset++)
554 			if (si->overlay.myBuffer[offset].buffer == ob->buffer) break;
557 		if (offset < MAXBUFFERS)
559 			LOG(4,("succesfull, switching to buffer %d\n", offset));
562 			eng_configure_bes(ob, ow, ov, offset);