| 1 |
/* |
| 2 |
* video_blit.cpp - Video/graphics emulation, blitters |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2001 Christian Bauer |
| 5 |
* |
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* This program is free software; you can redistribute it and/or modify |
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* 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. |
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* |
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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. |
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* |
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* 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 |
*/ |
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|
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#include "sysdeps.h" |
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#include "video.h" |
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|
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <X11/Xlib.h> |
| 27 |
#include <X11/Xutil.h> |
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|
| 29 |
#ifdef ENABLE_VOSF |
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// Format of the target visual |
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struct VisualFormat { |
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int depth; // Screen depth |
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uint32 Rmask, Gmask, Bmask; // RGB mask values |
| 34 |
uint32 Rshift, Gshift, Bshift; // RGB shift values |
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}; |
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static VisualFormat visualFormat; |
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|
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// This holds the pixels values of the palette colors for 8->16/32-bit expansion |
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uint32 ExpandMap[256]; |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- 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) |
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{ |
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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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|
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#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 --- */ |
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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) >> 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 |
| 133 |
#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) << 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)))) |
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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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#endif |
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|
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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)) |
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|
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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" |
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|
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/* -------------------------------------------------------------------------- */ |
| 254 |
/* --- BGR 888 --- */ |
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/* -------------------------------------------------------------------------- */ |
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|
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// Native byte order [BE] (untested) |
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|
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#ifdef WORDS_BIGENDIAN |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 16) & 0xff) | ((src) & 0xff00) | (((src) & 0xff) << 16)) |
| 263 |
|
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#define FB_BLIT_4(dst, src) \ |
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(dst = (((src) >> 16) & UVAL64(0x000000ff000000ff)) | \ |
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( (src) & UVAL64(0x0000ff000000ff00)) | \ |
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(((src) & UVAL64(0x000000ff000000ff)) << 16)) |
| 268 |
|
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#define FB_FUNC_NAME Blit_BGR888_NBO |
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#define FB_DEPTH 24 |
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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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// Opposite byte order [LE] (untested) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 16) & 0xff) | ((src) & 0xff0000) | (((src) & 0xff) << 16)) |
| 279 |
|
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#define FB_BLIT_4(dst, src) \ |
| 281 |
(dst = (((src) >> 16) & UVAL64(0x000000ff000000ff)) | \ |
| 282 |
( (src) & UVAL64(0x00ff000000ff0000)) | \ |
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(((src) & UVAL64(0x000000ff000000ff)) << 16)) |
| 284 |
|
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#define FB_FUNC_NAME Blit_BGR888_OBO |
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#define FB_DEPTH 24 |
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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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// Opposite byte order [BE] (untested) / Native byte order [LE] (untested) |
| 292 |
|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME Blit_BGR888_OBO |
| 295 |
#else |
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# define FB_FUNC_NAME Blit_BGR888_NBO |
| 297 |
#endif |
| 298 |
|
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#define FB_BLIT_2(dst, src) \ |
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(dst = ((src) & 0xff00ff) | (((src) & 0xff00) << 16)) |
| 301 |
|
| 302 |
#define FB_BLIT_4(dst, src) \ |
| 303 |
(dst = ((src) & UVAL64(0x00ff00ff00ff00ff)) | (((src) & UVAL64(0x0000ff000000ff00)) << 16)) |
| 304 |
|
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#define FB_DEPTH 24 |
| 306 |
#include "video_blit.h" |
| 307 |
|
| 308 |
/* -------------------------------------------------------------------------- */ |
| 309 |
/* --- 2/4-bit indexed to 8-bit mode conversion --- */ |
| 310 |
/* -------------------------------------------------------------------------- */ |
| 311 |
|
| 312 |
static void Blit_Expand_2_To_8(uint8 * dest, const uint8 * p, uint32 length) |
| 313 |
{ |
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uint8 *q = (uint8 *)dest; |
| 315 |
for (uint32 i=0; i<length; i++) { |
| 316 |
uint8 c = *p++; |
| 317 |
*q++ = c >> 6; |
| 318 |
*q++ = (c >> 4) & 3; |
| 319 |
*q++ = (c >> 2) & 3; |
| 320 |
*q++ = c & 3; |
| 321 |
} |
| 322 |
} |
| 323 |
|
| 324 |
static void Blit_Expand_4_To_8(uint8 * dest, const uint8 * p, uint32 length) |
| 325 |
{ |
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uint8 *q = (uint8 *)dest; |
| 327 |
for (uint32 i=0; i<length; i++) { |
| 328 |
uint8 c = *p++; |
| 329 |
*q++ = c >> 4; |
| 330 |
*q++ = c & 0x0f; |
| 331 |
} |
| 332 |
} |
| 333 |
|
| 334 |
/* -------------------------------------------------------------------------- */ |
| 335 |
/* --- 2/4/8-bit indexed to 16-bit mode color expansion --- */ |
| 336 |
/* -------------------------------------------------------------------------- */ |
| 337 |
|
| 338 |
static void Blit_Expand_2_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 339 |
{ |
| 340 |
uint16 *q = (uint16 *)dest; |
| 341 |
for (uint32 i=0; i<length; i++) { |
| 342 |
uint8 c = *p++; |
| 343 |
*q++ = ExpandMap[c >> 6]; |
| 344 |
*q++ = ExpandMap[c >> 4]; |
| 345 |
*q++ = ExpandMap[c >> 2]; |
| 346 |
*q++ = ExpandMap[c]; |
| 347 |
} |
| 348 |
} |
| 349 |
|
| 350 |
static void Blit_Expand_4_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++ = ExpandMap[c >> 4]; |
| 356 |
*q++ = ExpandMap[c]; |
| 357 |
} |
| 358 |
} |
| 359 |
|
| 360 |
static void Blit_Expand_8_To_16(uint8 * dest, const uint8 * p, uint32 length) |
| 361 |
{ |
| 362 |
uint16 *q = (uint16 *)dest; |
| 363 |
for (uint32 i=0; i<length; i++) |
| 364 |
*q++ = ExpandMap[*p++]; |
| 365 |
} |
| 366 |
|
| 367 |
/* -------------------------------------------------------------------------- */ |
| 368 |
/* --- 2/4/8-bit indexed to 32-bit mode color expansion --- */ |
| 369 |
/* -------------------------------------------------------------------------- */ |
| 370 |
|
| 371 |
static void Blit_Expand_2_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 372 |
{ |
| 373 |
uint32 *q = (uint32 *)dest; |
| 374 |
for (uint32 i=0; i<length; i++) { |
| 375 |
uint8 c = *p++; |
| 376 |
*q++ = ExpandMap[c >> 6]; |
| 377 |
*q++ = ExpandMap[c >> 4]; |
| 378 |
*q++ = ExpandMap[c >> 2]; |
| 379 |
*q++ = ExpandMap[c]; |
| 380 |
} |
| 381 |
} |
| 382 |
|
| 383 |
static void Blit_Expand_4_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 384 |
{ |
| 385 |
uint32 *q = (uint32 *)dest; |
| 386 |
for (uint32 i=0; i<length; i++) { |
| 387 |
uint8 c = *p++; |
| 388 |
*q++ = ExpandMap[c >> 4]; |
| 389 |
*q++ = ExpandMap[c]; |
| 390 |
} |
| 391 |
} |
| 392 |
|
| 393 |
static void Blit_Expand_8_To_32(uint8 * dest, const uint8 * p, uint32 length) |
| 394 |
{ |
| 395 |
uint32 *q = (uint32 *)dest; |
| 396 |
for (uint32 i=0; i<length; i++) |
| 397 |
*q++ = ExpandMap[*p++]; |
| 398 |
} |
| 399 |
|
| 400 |
/* -------------------------------------------------------------------------- */ |
| 401 |
/* --- Blitters to the host frame buffer, or XImage buffer --- */ |
| 402 |
/* -------------------------------------------------------------------------- */ |
| 403 |
|
| 404 |
// Function used to update the hosst frame buffer (DGA), or an XImage buffer (WIN) |
| 405 |
// --> Shall be initialized only through the Screen_blitter_init() function |
| 406 |
typedef void (*Screen_blit_func)(uint8 * dest, const uint8 * source, uint32 length); |
| 407 |
Screen_blit_func Screen_blit = 0; |
| 408 |
|
| 409 |
// Structure used to match the adequate framebuffer update function |
| 410 |
struct Screen_blit_func_info { |
| 411 |
int depth; // Screen depth |
| 412 |
uint32 Rmask; // Red mask |
| 413 |
uint32 Gmask; // Green mask |
| 414 |
uint32 Bmask; // Blue mask |
| 415 |
Screen_blit_func handler_nbo; // Update function (native byte order) |
| 416 |
Screen_blit_func handler_obo; // Update function (opposite byte order) |
| 417 |
}; |
| 418 |
|
| 419 |
// Table of visual formats supported and their respective handler |
| 420 |
static Screen_blit_func_info Screen_blitters[] = { |
| 421 |
#ifdef WORDS_BIGENDIAN |
| 422 |
{ 1, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // NT |
| 423 |
{ 8, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // OK (NBO) |
| 424 |
{ 15, 0x007c00, 0x0003e0, 0x00001f, Blit_Copy_Raw , Blit_RGB555_OBO }, // OK (OBO) |
| 425 |
{ 15, 0x00001f, 0x0003e0, 0x007c00, Blit_BGR555_NBO , Blit_BGR555_OBO }, // NT |
| 426 |
{ 16, 0x00f800, 0x0007e0, 0x00001f, Blit_RGB565_NBO , Blit_RGB565_OBO }, // OK (OBO) |
| 427 |
{ 24, 0xff0000, 0x00ff00, 0x0000ff, Blit_Copy_Raw , Blit_RGB888_OBO }, // OK (OBO) |
| 428 |
{ 24, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO }, // NT |
| 429 |
{ 32, 0xff0000, 0x00ff00, 0x0000ff, Blit_Copy_Raw , Blit_RGB888_OBO }, // OK |
| 430 |
{ 32, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO } // OK |
| 431 |
#else |
| 432 |
{ 1, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // NT |
| 433 |
{ 8, 0x000000, 0x000000, 0x000000, Blit_Copy_Raw , Blit_Copy_Raw }, // OK (NBO) |
| 434 |
{ 15, 0x007c00, 0x0003e0, 0x00001f, Blit_RGB555_NBO , Blit_Copy_Raw }, // OK (NBO) |
| 435 |
{ 15, 0x00001f, 0x0003e0, 0x007c00, Blit_BGR555_NBO , Blit_BGR555_OBO }, // NT |
| 436 |
{ 16, 0x00f800, 0x0007e0, 0x00001f, Blit_RGB565_NBO , Blit_RGB565_OBO }, // OK (NBO) |
| 437 |
{ 24, 0xff0000, 0x00ff00, 0x0000ff, Blit_RGB888_NBO , Blit_Copy_Raw }, // OK (NBO) |
| 438 |
{ 24, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO }, // NT |
| 439 |
{ 32, 0xff0000, 0x00ff00, 0x0000ff, Blit_RGB888_NBO , Blit_Copy_Raw }, // OK (NBO) |
| 440 |
{ 32, 0x0000ff, 0x00ff00, 0xff0000, Blit_BGR888_NBO , Blit_BGR888_OBO } // NT |
| 441 |
#endif |
| 442 |
}; |
| 443 |
|
| 444 |
// Initialize the framebuffer update function |
| 445 |
// Returns FALSE, if the function was to be reduced to a simple memcpy() |
| 446 |
// --> In that case, VOSF is not necessary |
| 447 |
bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order, video_depth mac_depth) |
| 448 |
{ |
| 449 |
#if REAL_ADDRESSING || DIRECT_ADDRESSING |
| 450 |
if (mac_depth == VDEPTH_1BIT) { |
| 451 |
|
| 452 |
// 1-bit mode uses a 1-bit X image, so there's no need for special blitting routines |
| 453 |
Screen_blit = Blit_Copy_Raw; |
| 454 |
|
| 455 |
} else { |
| 456 |
|
| 457 |
visualFormat.depth = visual_info->depth; |
| 458 |
visualFormat.Rmask = visual_info->red_mask; |
| 459 |
visualFormat.Gmask = visual_info->green_mask; |
| 460 |
visualFormat.Bmask = visual_info->blue_mask; |
| 461 |
|
| 462 |
// Compute RGB shift values |
| 463 |
visualFormat.Rshift = 0; |
| 464 |
for (uint32 Rmask = visualFormat.Rmask; Rmask && ((Rmask & 1) != 1); Rmask >>= 1) |
| 465 |
++visualFormat.Rshift; |
| 466 |
visualFormat.Gshift = 0; |
| 467 |
for (uint32 Gmask = visualFormat.Gmask; Gmask && ((Gmask & 1) != 1); Gmask >>= 1) |
| 468 |
++visualFormat.Gshift; |
| 469 |
visualFormat.Bshift = 0; |
| 470 |
for (uint32 Bmask = visualFormat.Bmask; Bmask && ((Bmask & 1) != 1); Bmask >>= 1) |
| 471 |
++visualFormat.Bshift; |
| 472 |
|
| 473 |
bool blitter_found = false; |
| 474 |
|
| 475 |
// 2/4/8-bit mode on 8/16/32-bit screen? |
| 476 |
if (visualFormat.depth == 8) { |
| 477 |
if (mac_depth == VDEPTH_2BIT) { |
| 478 |
Screen_blit = Blit_Expand_2_To_8; |
| 479 |
blitter_found = true; |
| 480 |
} else if (mac_depth == VDEPTH_4BIT) { |
| 481 |
Screen_blit = Blit_Expand_4_To_8; |
| 482 |
blitter_found = true; |
| 483 |
} |
| 484 |
} else if (visualFormat.depth == 15 || visualFormat.depth == 16) { |
| 485 |
if (mac_depth == VDEPTH_2BIT) { |
| 486 |
Screen_blit = Blit_Expand_2_To_16; |
| 487 |
blitter_found = true; |
| 488 |
} else if (mac_depth == VDEPTH_4BIT) { |
| 489 |
Screen_blit = Blit_Expand_4_To_16; |
| 490 |
blitter_found = true; |
| 491 |
} else if (mac_depth == VDEPTH_8BIT) { |
| 492 |
Screen_blit = Blit_Expand_8_To_16; |
| 493 |
blitter_found = true; |
| 494 |
} |
| 495 |
} else if (visualFormat.depth == 24 || visualFormat.depth == 32) { |
| 496 |
if (mac_depth == VDEPTH_2BIT) { |
| 497 |
Screen_blit = Blit_Expand_2_To_32; |
| 498 |
blitter_found = true; |
| 499 |
} else if (mac_depth == VDEPTH_4BIT) { |
| 500 |
Screen_blit = Blit_Expand_4_To_32; |
| 501 |
blitter_found = true; |
| 502 |
} else if (mac_depth == VDEPTH_8BIT) { |
| 503 |
Screen_blit = Blit_Expand_8_To_32; |
| 504 |
blitter_found = true; |
| 505 |
} |
| 506 |
} |
| 507 |
|
| 508 |
// Search for an adequate blit function |
| 509 |
const int blitters_count = sizeof(Screen_blitters)/sizeof(Screen_blitters[0]); |
| 510 |
for (int i = 0; !blitter_found && (i < blitters_count); i++) { |
| 511 |
if ( (visualFormat.depth == Screen_blitters[i].depth) |
| 512 |
&& (visualFormat.Rmask == Screen_blitters[i].Rmask) |
| 513 |
&& (visualFormat.Gmask == Screen_blitters[i].Gmask) |
| 514 |
&& (visualFormat.Bmask == Screen_blitters[i].Bmask) |
| 515 |
) |
| 516 |
{ |
| 517 |
blitter_found = true; |
| 518 |
Screen_blit = native_byte_order |
| 519 |
? Screen_blitters[i].handler_nbo |
| 520 |
: Screen_blitters[i].handler_obo |
| 521 |
; |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
// No appropriate blitter found, dump RGB mask values and abort() |
| 526 |
if (!blitter_found) { |
| 527 |
fprintf(stderr, "### No appropriate blitter found\n"); |
| 528 |
fprintf(stderr, "\tR/G/B mask values : 0x%06x, 0x%06x, 0x%06x (depth = %d)\n", |
| 529 |
visualFormat.Rmask, visualFormat.Gmask, visualFormat.Bmask, visualFormat.depth); |
| 530 |
fprintf(stderr, "\tR/G/B shift values : %d/%d/%d\n", |
| 531 |
visualFormat.Rshift, visualFormat.Gshift, visualFormat.Bshift); |
| 532 |
abort(); |
| 533 |
} |
| 534 |
} |
| 535 |
#else |
| 536 |
// The UAE memory handlers will blit correctly |
| 537 |
// --> no need for specialised blitters here |
| 538 |
Screen_blit = Blit_Copy_Raw; |
| 539 |
#endif |
| 540 |
|
| 541 |
// If the blitter simply reduces to a copy, we don't need VOSF in DGA mode |
| 542 |
// --> In that case, we return FALSE |
| 543 |
return (Screen_blit != Blit_Copy_Raw); |
| 544 |
} |
| 545 |
#endif /* ENABLE_VOSF */ |
