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/*
* Copyright 2003 Red Hat, Inc. All Rights Reserved.
* Copyright 2004 Ark Linux <bero@arklinux.org>. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sub license,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "via.h"
#include "via_driver.h"
#define ALIGNMENT_EXPERIMENT
#ifdef ALIGNMENT_EXPERIMENT
/* ALIGNMENT_EXPERIMENT accesses the YUV buffer using 32 bit values rather
* than 8 bit ones. It works great on x86 with gcc 3.3, but I'd like to hear
* about other architectures and compilers before enabling it by default.
*
* Note: ALIGNMENT_EXPERIMENT changes the last parameter of ViaYUVFillBlack
* to quads rather than pixels.
*/
#include <stdint.h>
#endif
static __inline void ViaYUVFillBlack(VIAPtr pVia, int offset, int num)
{
#ifdef ALIGNMENT_EXPERIMENT
uint32_t *ptr = (uint32_t*)(pVia->FBBase + offset);
while(num-- > 0) {
*ptr++ = 0x00800080;
}
#else
unsigned char *ptr = pVia->FBBase + offset;
while(num-- > 0) {
*ptr++ = 0x00;
*ptr++ = 0x80;
}
#endif
}
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