| 1 |
/* |
| 2 |
* video_blit.cpp - Video/graphics emulation, blitters |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2005 Christian Bauer |
| 5 |
* |
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* This program is free software; you can redistribute it and/or modify |
| 7 |
* it under the terms of the GNU General Public License as published by |
| 8 |
* the Free Software Foundation; either version 2 of the License, or |
| 9 |
* (at your option) any later version. |
| 10 |
* |
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* This program is distributed in the hope that it will be useful, |
| 12 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 |
* GNU General Public License for more details. |
| 15 |
* |
| 16 |
* You should have received a copy of the GNU General Public License |
| 17 |
* along with this program; if not, write to the Free Software |
| 18 |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 |
*/ |
| 20 |
|
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#include "sysdeps.h" |
| 22 |
#include "video.h" |
| 23 |
#include "video_blit.h" |
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|
| 25 |
#include <stdio.h> |
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#include <stdlib.h> |
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|
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// Format of the target visual |
| 29 |
static VisualFormat visualFormat; |
| 30 |
|
| 31 |
// This holds the pixels values of the palette colors for 8->16/32-bit expansion |
| 32 |
uint32 ExpandMap[256]; |
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|
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// Mark video_blit.h for specialization |
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#define DEFINE_VIDEO_BLITTERS 1 |
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|
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/* -------------------------------------------------------------------------- */ |
| 38 |
/* --- Raw Copy / No conversion required --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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static void Blit_Copy_Raw(uint8 * dest, const uint8 * source, uint32 length) |
| 42 |
{ |
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// This function is likely to be inlined and/or highly optimized |
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memcpy(dest, source, length); |
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} |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- RGB 555 --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME Blit_RGB555_OBO |
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#else |
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# define FB_FUNC_NAME Blit_RGB555_NBO |
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#endif |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) >> 8) & 0xff) | (((src) & 0xff) << 8)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 8) & 0x00ff00ff) | (((src) & 0x00ff00ff) << 8)) |
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|
| 63 |
#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 8) & UVAL64(0x00ff00ff00ff00ff)) | \ |
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(((src) & UVAL64(0x00ff00ff00ff00ff)) << 8)) |
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|
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#define FB_DEPTH 15 |
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#include "video_blit.h" |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- BGR 555 --- */ |
| 72 |
/* -------------------------------------------------------------------------- */ |
| 73 |
|
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#ifdef WORDS_BIGENDIAN |
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|
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// Native byte order |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) >> 10) & 0x001f) | ((src) & 0x03e0) | (((src) << 10) & 0x7c00)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 10) & 0x001f001f) | ((src) & 0x03e003e0) | (((src) << 10) & 0x7c007c00)) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 10) & UVAL64(0x001f001f001f001f)) | \ |
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( (src) & UVAL64(0x03e003e003e003e0)) | \ |
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(((src) << 10) & UVAL64(0x7c007c007c007c00))) |
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|
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#define FB_DEPTH 15 |
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#define FB_FUNC_NAME Blit_BGR555_NBO |
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#include "video_blit.h" |
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|
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// Opposite byte order (untested) |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) >> 2) & 0x1f00) | (((src) >> 8) & 3) | (((src) << 8) & 0xe000) | (((src) << 2) & 0x7c)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 2) & 0x1f001f00) | (((src) >> 8) & 0x30003) | (((src) << 8) & 0xe000e000) | (((src) << 2) & 0x7c007c)) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 2) & UVAL64(0x1f001f001f001f00)) | \ |
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(((src) >> 8) & UVAL64(0x0003000300030003)) | \ |
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(((src) << 8) & UVAL64(0xe000e000e000e000)) | \ |
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(((src) << 2) & UVAL64(0x007c007c007c007c))) |
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|
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#define FB_DEPTH 15 |
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#define FB_FUNC_NAME Blit_BGR555_OBO |
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#include "video_blit.h" |
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|
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#else |
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|
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// Native byte order (untested) |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) >> 2) & 0x1f) | (((src) >> 8) & 0xe0) | (((src) << 8) & 0x0300) | (((src) << 2) & 0x7c00)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 2) & 0x1f001f) | (((src) >> 8) & 0xe000e0) | (((src) << 8) & 0x03000300) | (((src) << 2) & 0x7c007c00)) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 2) & UVAL64(0x001f001f001f001f)) | \ |
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(((src) >> 8) & UVAL64(0x00e000e000e000e0)) | \ |
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(((src) << 8) & UVAL64(0x0300030003000300)) | \ |
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(((src) << 2) & UVAL64(0x7c007c007c007c00))) |
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|
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#define FB_DEPTH 15 |
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#define FB_FUNC_NAME Blit_BGR555_NBO |
| 129 |
#include "video_blit.h" |
| 130 |
|
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// Opposite byte order (untested) |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) << 6) & 0x1f00) | ((src) & 0xe003) | (((src) >> 6) & 0x7c)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) << 6) & 0x1f001f00) | ((src) & 0xe003e003) | (((src) >> 6) & 0x7c007c)) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) << 6) & UVAL64(0x1f001f001f001f00)) | \ |
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( (src) & UVAL64(0xe003e003e003e003)) | \ |
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(((src) >> 6) & UVAL64(0x007c007c007c007c))) |
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|
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#define FB_DEPTH 15 |
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#define FB_FUNC_NAME Blit_BGR555_OBO |
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#include "video_blit.h" |
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|
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#endif |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- RGB 565 --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#ifdef WORDS_BIGENDIAN |
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|
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// Native byte order |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) & 0x1f) | (((src) << 1) & 0xffc0))) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) & 0x001f001f) | (((src) << 1) & 0xffc0ffc0))) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) & UVAL64(0x001f001f001f001f)) | \ |
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(((src) << 1) & UVAL64(0xffc0ffc0ffc0ffc0)))) |
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|
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#define FB_DEPTH 16 |
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#define FB_FUNC_NAME Blit_RGB565_NBO |
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#include "video_blit.h" |
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|
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// Opposite byte order |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = ((((src) >> 7) & 0xff) | (((src) << 9) & 0xc000) | (((src) << 8) & 0x1f00))) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = ((((src) >> 7) & 0x00ff00ff) | (((src) << 9) & 0xc000c000) | (((src) << 8) & 0x1f001f00))) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 7) & UVAL64(0x00ff00ff00ff00ff)) | \ |
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(((src) << 9) & UVAL64(0xc000c000c000c000)) | \ |
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(((src) << 8) & UVAL64(0x1f001f001f001f00))) |
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|
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#define FB_DEPTH 16 |
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#define FB_FUNC_NAME Blit_RGB565_OBO |
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#include "video_blit.h" |
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|
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#else |
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|
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// Native byte order |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) >> 8) & 0x001f) | (((src) << 9) & 0xfe00) | (((src) >> 7) & 0x01c0)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 8) & 0x001f001f) | (((src) << 9) & 0xfe00fe00) | (((src) >> 7) & 0x01c001c0)) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 8) & UVAL64(0x001f001f001f001f)) | \ |
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(((src) << 9) & UVAL64(0xfe00fe00fe00fe00)) | \ |
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(((src) >> 7) & UVAL64(0x01c001c001c001c0))) |
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|
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#define FB_DEPTH 16 |
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#define FB_FUNC_NAME Blit_RGB565_NBO |
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#include "video_blit.h" |
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|
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// Opposite byte order (untested) |
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|
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#define FB_BLIT_1(dst, src) \ |
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(dst = (((src) & 0x1f00) | (((src) << 1) & 0xe0fe) | (((src) >> 15) & 1))) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) & 0x1f001f00) | (((src) << 1) & 0xe0fee0fe) | (((src) >> 15) & 0x10001))) |
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|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) & UVAL64(0x1f001f001f001f00)) | \ |
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(((src) << 1) & UVAL64(0xe0fee0fee0fee0fe)) | \ |
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(((src) >> 15) & UVAL64(0x0001000100010001)))) |
| 220 |
|
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#define FB_DEPTH 16 |
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#define FB_FUNC_NAME Blit_RGB565_OBO |
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#include "video_blit.h" |
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|
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#endif |
| 226 |
|
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/* -------------------------------------------------------------------------- */ |
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/* --- RGB 888 --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME Blit_RGB888_OBO |
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#else |
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# define FB_FUNC_NAME Blit_RGB888_NBO |
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#endif |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 24) & 0xff) | (((src) >> 8) & 0xff00) | (((src) & 0xff00) << 8) | (((src) & 0xff) << 24)) |
| 239 |
|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 24) & UVAL64(0x000000ff000000ff)) | \ |
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(((src) >> 8) & UVAL64(0x0000ff000000ff00)) | \ |
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(((src) & UVAL64(0x0000ff000000ff00)) << 8) | \ |
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(((src) & UVAL64(0x000000ff000000ff)) << 24)) |
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|
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#define FB_DEPTH 24 |
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#include "video_blit.h" |
| 248 |
|
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/* -------------------------------------------------------------------------- */ |
| 250 |
/* --- BGR 888 --- */ |
| 251 |
/* -------------------------------------------------------------------------- */ |
| 252 |
|
| 253 |
// Native byte order [BE] (untested) |
| 254 |
|
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#ifdef WORDS_BIGENDIAN |
| 256 |
|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 16) & 0xff) | ((src) & 0xff00) | (((src) & 0xff) << 16)) |
| 259 |
|
| 260 |
#define FB_BLIT_4(dst, src) \ |
| 261 |
(dst = (((src) >> 16) & UVAL64(0x000000ff000000ff)) | \ |
| 262 |
( (src) & UVAL64(0x0000ff000000ff00)) | \ |
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(((src) & UVAL64(0x000000ff000000ff)) << 16)) |
| 264 |
|
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#define FB_FUNC_NAME Blit_BGR888_NBO |
| 266 |
#define FB_DEPTH 24 |
| 267 |
#include "video_blit.h" |
| 268 |
|
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#else |
| 270 |
|
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// Opposite byte order [LE] (untested) |
| 272 |
|
| 273 |
#define FB_BLIT_2(dst, src) \ |
| 274 |
(dst = (((src) >> 16) & 0xff) | ((src) & 0xff0000) | (((src) & 0xff) << 16)) |
| 275 |
|
| 276 |
#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 16) & UVAL64(0x000000ff000000ff)) | \ |
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( (src) & UVAL64(0x00ff000000ff0000)) | \ |
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(((src) & UVAL64(0x000000ff000000ff)) << 16)) |
| 280 |
|
| 281 |
#define FB_FUNC_NAME Blit_BGR888_OBO |
| 282 |
#define FB_DEPTH 24 |
| 283 |
#include "video_blit.h" |
| 284 |
|
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#endif |
| 286 |
|
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// Opposite byte order [BE] (untested) / Native byte order [LE] (untested) |
| 288 |
|
| 289 |
#ifdef WORDS_BIGENDIAN |
| 290 |
# define FB_FUNC_NAME Blit_BGR888_OBO |
| 291 |
#else |
| 292 |
# define FB_FUNC_NAME Blit_BGR888_NBO |
| 293 |
#endif |
| 294 |
|
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#define FB_BLIT_2(dst, src) \ |
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(dst = ((src) & 0xff00ff) | (((src) & 0xff00) << 16)) |
| 297 |
|
| 298 |
#define FB_BLIT_4(dst, src) \ |
| 299 |
(dst = ((src) & UVAL64(0x00ff00ff00ff00ff)) | (((src) & UVAL64(0x0000ff000000ff00)) << 16)) |
| 300 |
|
| 301 |
#define FB_DEPTH 24 |
| 302 |
#include "video_blit.h" |
| 303 |
|
| 304 |
/* -------------------------------------------------------------------------- */ |
| 305 |
/* --- 1/2/4-bit indexed to 8-bit mode conversion --- */ |
| 306 |
/* -------------------------------------------------------------------------- */ |
| 307 |
|
| 308 |
static void Blit_Expand_1_To_8(uint8 * dest, const uint8 * p, uint32 length) |
| 309 |
{ |
| 310 |
uint8 *q = (uint8 *)dest; |
| 311 |
for (uint32 i=0; i<length; i++) { |
| 312 |
uint8 c = *p++; |
| 313 |
*q++ = c >> 7; |
| 314 |
*q++ = (c >> 6) & 1; |
| 315 |
*q++ = (c >> 5) & 1; |
| 316 |
*q++ = (c >> 4) & 1; |
| 317 |
*q++ = (c >> 3) & 1; |
| 318 |
*q++ = (c >> 2) & 1; |
| 319 |
*q++ = (c >> 1) & 1; |
| 320 |
*q++ = c & 1; |
| 321 |
} |
| 322 |
} |
| 323 |
|
| 324 |
static void Blit_Expand_2_To_8(uint8 * dest, const uint8 * p, uint32 length) |
| 325 |
{ |
| 326 |
uint8 *q = (uint8 *)dest; |
| 327 |
for (uint32 i=0; i<length; i++) { |
| 328 |
uint8 c = *p++; |
| 329 |
*q++ = c >> 6; |
| 330 |
*q++ = (c >> 4) & 3; |
| 331 |
*q++ = (c >> 2) & 3; |
| 332 |
*q++ = c & 3; |
| 333 |
} |
| 334 |
} |
| 335 |
|
| 336 |
static void Blit_Expand_4_To_8(uint8 * dest, const uint8 * p, uint32 length) |
| 337 |
{ |
| 338 |
uint8 *q = (uint8 *)dest; |
| 339 |
for (uint32 i=0; i<length; i++) { |
| 340 |
uint8 c = *p++; |
| 341 |
*q++ = c >> 4; |
| 342 |
*q++ = c & 0x0f; |
| 343 |
} |
| 344 |
} |
| 345 |
|
| 346 |
/* -------------------------------------------------------------------------- */ |
| 347 |
/* --- 1/2/4/8-bit indexed to 16-bit mode color expansion --- */ |
| 348 |
/* -------------------------------------------------------------------------- */ |
| 349 |
|
| 350 |
static void Blit_Expand_1_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 351 |
{ |
| 352 |
uint16 *q = (uint16 *)dest; |
| 353 |
for (uint32 i=0; i<length; i++) { |
| 354 |
uint8 c = *p++; |
| 355 |
*q++ = -(c >> 7); |
| 356 |
*q++ = -((c >> 6) & 1); |
| 357 |
*q++ = -((c >> 5) & 1); |
| 358 |
*q++ = -((c >> 4) & 1); |
| 359 |
*q++ = -((c >> 3) & 1); |
| 360 |
*q++ = -((c >> 2) & 1); |
| 361 |
*q++ = -((c >> 1) & 1); |
| 362 |
*q++ = -(c & 1); |
| 363 |
} |
| 364 |
} |
| 365 |
|
| 366 |
static void Blit_Expand_2_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 367 |
{ |
| 368 |
uint16 *q = (uint16 *)dest; |
| 369 |
for (uint32 i=0; i<length; i++) { |
| 370 |
uint8 c = *p++; |
| 371 |
*q++ = ExpandMap[c >> 6]; |
| 372 |
*q++ = ExpandMap[c >> 4]; |
| 373 |
*q++ = ExpandMap[c >> 2]; |
| 374 |
*q++ = ExpandMap[c]; |
| 375 |
} |
| 376 |
} |
| 377 |
|
| 378 |
static void Blit_Expand_4_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 379 |
{ |
| 380 |
uint16 *q = (uint16 *)dest; |
| 381 |
for (uint32 i=0; i<length; i++) { |
| 382 |
uint8 c = *p++; |
| 383 |
*q++ = ExpandMap[c >> 4]; |
| 384 |
*q++ = ExpandMap[c]; |
| 385 |
} |
| 386 |
} |
| 387 |
|
| 388 |
static void Blit_Expand_8_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 389 |
{ |
| 390 |
uint16 *q = (uint16 *)dest; |
| 391 |
for (uint32 i=0; i<length; i++) |
| 392 |
*q++ = ExpandMap[*p++]; |
| 393 |
} |
| 394 |
|
| 395 |
/* -------------------------------------------------------------------------- */ |
| 396 |
/* --- 1/2/4/8-bit indexed to 32-bit mode color expansion --- */ |
| 397 |
/* -------------------------------------------------------------------------- */ |
| 398 |
|
| 399 |
static void Blit_Expand_1_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 400 |
{ |
| 401 |
uint32 *q = (uint32 *)dest; |
| 402 |
for (uint32 i=0; i<length; i++) { |
| 403 |
uint8 c = *p++; |
| 404 |
*q++ = -(c >> 7); |
| 405 |
*q++ = -((c >> 6) & 1); |
| 406 |
*q++ = -((c >> 5) & 1); |
| 407 |
*q++ = -((c >> 4) & 1); |
| 408 |
*q++ = -((c >> 3) & 1); |
| 409 |
*q++ = -((c >> 2) & 1); |
| 410 |
*q++ = -((c >> 1) & 1); |
| 411 |
*q++ = -(c & 1); |
| 412 |
} |
| 413 |
} |
| 414 |
|
| 415 |
static void Blit_Expand_2_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 416 |
{ |
| 417 |
uint32 *q = (uint32 *)dest; |
| 418 |
for (uint32 i=0; i<length; i++) { |
| 419 |
uint8 c = *p++; |
| 420 |
*q++ = ExpandMap[c >> 6]; |
| 421 |
*q++ = ExpandMap[c >> 4]; |
| 422 |
*q++ = ExpandMap[c >> 2]; |
| 423 |
*q++ = ExpandMap[c]; |
| 424 |
} |
| 425 |
} |
| 426 |
|
| 427 |
static void Blit_Expand_4_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 428 |
{ |
| 429 |
uint32 *q = (uint32 *)dest; |
| 430 |
for (uint32 i=0; i<length; i++) { |
| 431 |
uint8 c = *p++; |
| 432 |
*q++ = ExpandMap[c >> 4]; |
| 433 |
*q++ = ExpandMap[c]; |
| 434 |
} |
| 435 |
} |
| 436 |
|
| 437 |
static void Blit_Expand_8_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 438 |
{ |
| 439 |
uint32 *q = (uint32 *)dest; |
| 440 |
for (uint32 i=0; i<length; i++) |
| 441 |
*q++ = ExpandMap[*p++]; |
| 442 |
} |
| 443 |
|
| 444 |
/* -------------------------------------------------------------------------- */ |
| 445 |
/* --- Blitters to the host frame buffer, or XImage buffer --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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// Function used to update the hosst frame buffer (DGA), or an XImage buffer (WIN) |
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// --> Shall be initialized only through the Screen_blitter_init() function |
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typedef void (*Screen_blit_func)(uint8 * dest, const uint8 * source, uint32 length); |
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Screen_blit_func Screen_blit = 0; |
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|
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// Structure used to match the adequate framebuffer update function |
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struct Screen_blit_func_info { |
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int depth; // Screen depth |
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uint32 Rmask; // Red mask |
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uint32 Gmask; // Green mask |
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uint32 Bmask; // Blue mask |
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Screen_blit_func handler_nbo; // Update function (native byte order) |
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Screen_blit_func handler_obo; // Update function (opposite byte order) |
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}; |
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|
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// Table of visual formats supported and their respective handler |
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static Screen_blit_func_info Screen_blitters[] = { |
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#ifdef WORDS_BIGENDIAN |
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{ 1, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // NT |
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{ 8, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // OK (NBO) |
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{ 15, 0x007c00, 0x0003e0, 0x00001f, Blit_Copy_Raw , Blit_RGB555_OBO }, // OK (OBO) |
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{ 15, 0x00001f, 0x0003e0, 0x007c00, Blit_BGR555_NBO , Blit_BGR555_OBO }, // NT |
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{ 16, 0x007c00, 0x0003e0, 0x00001f, Blit_Copy_Raw , Blit_RGB555_OBO }, // OK (OBO) |
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{ 16, 0x00f800, 0x0007e0, 0x00001f, Blit_RGB565_NBO , Blit_RGB565_OBO }, // OK (OBO) |
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{ 24, 0xff0000, 0x00ff00, 0x0000ff, Blit_Copy_Raw , Blit_RGB888_OBO }, // OK (OBO) |
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{ 24, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO }, // NT |
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{ 32, 0xff0000, 0x00ff00, 0x0000ff, Blit_Copy_Raw , Blit_RGB888_OBO }, // OK |
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{ 32, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO } // OK |
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#else |
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{ 1, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // NT |
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{ 8, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // OK (NBO) |
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{ 15, 0x007c00, 0x0003e0, 0x00001f, Blit_RGB555_NBO , Blit_Copy_Raw }, // OK (NBO) |
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{ 15, 0x00001f, 0x0003e0, 0x007c00, Blit_BGR555_NBO , Blit_BGR555_OBO }, // NT |
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{ 16, 0x007c00, 0x0003e0, 0x00001f, Blit_RGB555_NBO , Blit_Copy_Raw }, // OK (NBO) |
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{ 16, 0x00f800, 0x0007e0, 0x00001f, Blit_RGB565_NBO , Blit_RGB565_OBO }, // OK (NBO) |
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{ 24, 0xff0000, 0x00ff00, 0x0000ff, Blit_RGB888_NBO , Blit_Copy_Raw }, // OK (NBO) |
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{ 24, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO }, // NT |
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{ 32, 0xff0000, 0x00ff00, 0x0000ff, Blit_RGB888_NBO , Blit_Copy_Raw }, // OK (NBO) |
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{ 32, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO } // NT |
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#endif |
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}; |
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|
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// Initialize the framebuffer update function |
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// Returns FALSE, if the function was to be reduced to a simple memcpy() |
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// --> In that case, VOSF is not necessary |
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bool Screen_blitter_init(VisualFormat const & visual_format, bool native_byte_order, int mac_depth) |
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{ |
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#if USE_SDL_VIDEO |
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const bool use_sdl_video = true; |
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#else |
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const bool use_sdl_video = false; |
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#endif |
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
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if (mac_depth == 1 && !use_sdl_video && !visual_format.fullscreen) { |
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|
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// Windowed 1-bit mode uses a 1-bit X image, so there's no need for special blitting routines |
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Screen_blit = Blit_Copy_Raw; |
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|
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} else { |
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|
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// Compute RGB shift values |
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visualFormat = visual_format; |
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visualFormat.Rshift = 0; |
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for (uint32 Rmask = visualFormat.Rmask; Rmask && ((Rmask & 1) != 1); Rmask >>= 1) |
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++visualFormat.Rshift; |
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visualFormat.Gshift = 0; |
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for (uint32 Gmask = visualFormat.Gmask; Gmask && ((Gmask & 1) != 1); Gmask >>= 1) |
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++visualFormat.Gshift; |
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visualFormat.Bshift = 0; |
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for (uint32 Bmask = visualFormat.Bmask; Bmask && ((Bmask & 1) != 1); Bmask >>= 1) |
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++visualFormat.Bshift; |
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|
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// 1/2/4/8-bit mode on 8/16/32-bit screen? |
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Screen_blit = NULL; |
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switch (visualFormat.depth) { |
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case 8: |
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switch (mac_depth) { |
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case 1: Screen_blit = Blit_Expand_1_To_8; break; |
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case 2: Screen_blit = Blit_Expand_2_To_8; break; |
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case 4: Screen_blit = Blit_Expand_4_To_8; break; |
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} |
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break; |
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case 15: |
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case 16: |
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switch (mac_depth) { |
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case 1: Screen_blit = Blit_Expand_1_To_16; break; |
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case 2: Screen_blit = Blit_Expand_2_To_16; break; |
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case 4: Screen_blit = Blit_Expand_4_To_16; break; |
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case 8: Screen_blit = Blit_Expand_8_To_16; break; |
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} |
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break; |
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case 24: |
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case 32: |
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switch (mac_depth) { |
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case 1: Screen_blit = Blit_Expand_1_To_32; break; |
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case 2: Screen_blit = Blit_Expand_2_To_32; break; |
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case 4: Screen_blit = Blit_Expand_4_To_32; break; |
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case 8: Screen_blit = Blit_Expand_8_To_32; break; |
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} |
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break; |
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} |
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bool blitter_found = (Screen_blit != NULL); |
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|
| 551 |
// Search for an adequate blit function |
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const int blitters_count = sizeof(Screen_blitters)/sizeof(Screen_blitters[0]); |
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for (int i = 0; !blitter_found && (i < blitters_count); i++) { |
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if ( (visualFormat.depth == Screen_blitters[i].depth) |
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&& (visualFormat.Rmask == Screen_blitters[i].Rmask) |
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&& (visualFormat.Gmask == Screen_blitters[i].Gmask) |
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&& (visualFormat.Bmask == Screen_blitters[i].Bmask) |
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) |
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{ |
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blitter_found = true; |
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Screen_blit = native_byte_order |
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? Screen_blitters[i].handler_nbo |
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: Screen_blitters[i].handler_obo |
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; |
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} |
| 566 |
} |
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|
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// No appropriate blitter found, dump RGB mask values and abort() |
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if (!blitter_found) { |
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fprintf(stderr, "### No appropriate blitter found\n"); |
| 571 |
fprintf(stderr, "\tR/G/B mask values : 0x%06x, 0x%06x, 0x%06x (depth = %d)\n", |
| 572 |
visualFormat.Rmask, visualFormat.Gmask, visualFormat.Bmask, visualFormat.depth); |
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fprintf(stderr, "\tR/G/B shift values : %d/%d/%d\n", |
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visualFormat.Rshift, visualFormat.Gshift, visualFormat.Bshift); |
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abort(); |
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} |
| 577 |
} |
| 578 |
#else |
| 579 |
// The UAE memory handlers will blit correctly |
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// --> no need for specialised blitters here |
| 581 |
Screen_blit = Blit_Copy_Raw; |
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#endif |
| 583 |
|
| 584 |
// If the blitter simply reduces to a copy, we don't need VOSF in DGA mode |
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// --> In that case, we return FALSE |
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return (Screen_blit != Blit_Copy_Raw); |
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} |
