78 lines
2.6 KiB
C
78 lines
2.6 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 2008 H. Peter Anvin - All Rights Reserved
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom
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* the Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall
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* be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* ----------------------------------------------------------------------- */
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#include <inttypes.h>
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#include <minmax.h>
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#include <klibc/compiler.h>
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#include <string.h>
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#include <com32.h>
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#include <ilog2.h>
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#include "vesa.h"
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#include "video.h"
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static struct win_info wi;
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void __vesacon_init_copy_to_screen(void)
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{
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struct vesa_mode_info *const mi = &__vesa_info.mi;
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int winn;
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if (mi->mode_attr & 0x0080) {
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/* Linear frame buffer */
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wi.win_base = (char *)mi->lfb_ptr;
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wi.win_size = 1 << 31; /* 2 GB, i.e. one huge window */
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wi.win_pos = 0; /* Already positioned (only one position...) */
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wi.win_num = -1; /* Not a window */
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} else {
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/* Paged frame buffer */
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/* We have already tested that *one* of these is usable */
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if ((mi->win_attr[0] & 0x05) == 0x05 && mi->win_seg[0])
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winn = 0;
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else
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winn = 1;
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wi.win_num = winn;
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wi.win_base = (char *)(mi->win_seg[winn] << 4);
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wi.win_size = mi->win_size << 10;
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wi.win_gshift = ilog2(mi->win_grain) + 10;
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wi.win_pos = -1; /* Undefined position */
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}
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}
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void __vesacon_copy_to_screen(size_t dst, const uint32_t * src, size_t npixels)
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{
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size_t bytes = npixels * __vesacon_bytes_per_pixel;
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char rowbuf[bytes + 4] __aligned(4);
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const uint32_t *s;
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s = (const uint32_t *)__vesacon_format_pixels(rowbuf, src, npixels);
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firmware->vesa->screencpy(dst, s, bytes, &wi);
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}
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