102 lines
2.9 KiB
C
102 lines
2.9 KiB
C
/* ----------------------------------------------------------------------- *
|
|
*
|
|
* 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,
|
|
};
|