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/* ----------------------------------------------------------------------- *
*
* Copyright 2006-2008 H. Peter Anvin - 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, sublicense, 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 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
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS 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.
*
* ----------------------------------------------------------------------- */
/*
* fmtpixel.c
*
* Functions to format a single pixel
*/
#include <inttypes.h>
#include "video.h"
/*
* Format a sequence of pixels. The first argument is the line buffer;
* we can use it to write up to 4 bytes past the end of the last pixel.
* Return the place we should be copying from, this is usually the
* buffer address, but doesn't *have* to be.
*/
static const void *format_pxf_bgra32(void *ptr, const uint32_t * p, size_t n)
{
(void)ptr;
(void)n;
return p; /* No conversion needed! */
}
static const void *format_pxf_bgr24(void *ptr, const uint32_t * p, size_t n)
{
char *q = ptr;
while (n--) {
*(uint32_t *) q = *p++;
q += 3;
}
return ptr;
}
static const void *format_pxf_le_rgb16_565(void *ptr, const uint32_t * p,
size_t n)
{
uint32_t bgra;
uint16_t *q = ptr;
while (n--) {
bgra = *p++;
*q++ =
((bgra >> 3) & 0x1f) +
((bgra >> (2 + 8 - 5)) & (0x3f << 5)) +
((bgra >> (3 + 16 - 11)) & (0x1f << 11));
}
return ptr;
}
static const void *format_pxf_le_rgb15_555(void *ptr, const uint32_t * p,
size_t n)
{
uint32_t bgra;
uint16_t *q = ptr;
while (n--) {
bgra = *p++;
*q++ =
((bgra >> 3) & 0x1f) +
((bgra >> (2 + 8 - 5)) & (0x1f << 5)) +
((bgra >> (3 + 16 - 10)) & (0x1f << 10));
}
return ptr;
}
__vesacon_format_pixels_t __vesacon_format_pixels;
const __vesacon_format_pixels_t __vesacon_format_pixels_list[PXF_NONE] = {
[PXF_BGRA32] = format_pxf_bgra32,
[PXF_BGR24] = format_pxf_bgr24,
[PXF_LE_RGB16_565] = format_pxf_le_rgb16_565,
[PXF_LE_RGB15_555] = format_pxf_le_rgb15_555,
};
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