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/* |
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* video_blit.cpp - Video/graphics emulation, blitters |
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* |
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* Basilisk II (C) 1997-2001 Christian Bauer |
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* |
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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 |
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* the Free Software Foundation; either version 2 of the License, or |
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* (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, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* 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 |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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|
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#include "sysdeps.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> |
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#include <X11/Xutil.h> |
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|
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#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 |
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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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/* -------------------------------------------------------------------------- */ |
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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_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_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_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_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) << 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_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_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_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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// gb-- Disabled because I don't see any improvement |
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#if 0 && defined(__i386__) && defined(X86_ASSEMBLY) |
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|
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#define FB_BLIT_2(dst, src) \ |
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__asm__ ( "movl %0,%%ebx\n\t" \ |
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"movl %0,%%ebp\n\t" \ |
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"andl $0x1f001f00,%%ebx\n\t" \ |
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"andl $0x007f007f,%0\n\t" \ |
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"andl $0xe000e000,%%ebp\n\t" \ |
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"shrl $8,%%ebx\n\t" \ |
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"shrl $7,%%ebp\n\t" \ |
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"shll $9,%0\n\t" \ |
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"orl %%ebx,%%ebp\n\t" \ |
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"orl %%ebp,%0\n\t" \ |
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: "=r" (dst) : "0" (src) : "ebx", "ebp", "cc" ) |
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|
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#else |
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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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#endif |
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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_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_DEPTH 24 |
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#include "video_blit.h" |
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|
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/* -------------------------------------------------------------------------- */ |
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/* --- 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)) |
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|
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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)) |
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|
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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) |
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|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME Blit_BGR888_OBO |
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#else |
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# define FB_FUNC_NAME Blit_BGR888_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) & 0xff00ff) | (((src) & 0xff00) << 16)) |
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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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/* -------------------------------------------------------------------------- */ |
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/* --- 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, 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, 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(XVisualInfo * visual_info, bool native_byte_order) |
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{ |
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visualFormat.depth = visual_info->depth; |
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visualFormat.Rmask = visual_info->red_mask; |
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visualFormat.Gmask = visual_info->green_mask; |
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visualFormat.Bmask = visual_info->blue_mask; |
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|
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// Compute RGB shift values |
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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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// Search for an adequate blit function |
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bool blitter_found = false; |
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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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} |
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} |
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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"); |
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fprintf(stderr, "\tR/G/B mask values : 0x%06x, 0x%06x, 0x%06x (depth = %d)\n", |
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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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} |
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|
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// 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 |
| 355 |
return (Screen_blit != Blit_Copy_Raw); |
| 356 |
} |
| 357 |
#endif /* ENABLE_VOSF */ |
