| 1 |
/* |
| 2 |
* video_vosf.h - Video/graphics emulation, video on SEGV signals support |
| 3 |
* |
| 4 |
* Basilisk II (C) 1997-2000 Christian Bauer |
| 5 |
* |
| 6 |
* 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. |
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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 |
| 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 |
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*/ |
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|
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#ifndef VIDEO_VOSF_H |
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#define VIDEO_VOSF_H |
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|
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// Note: this file is #include'd in video_x.cpp |
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#ifdef ENABLE_VOSF |
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|
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/* |
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* Page-aligned memory allocation |
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*/ |
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|
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// Align on page boundaries |
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static uint32 align_on_page_boundary(uint32 size) |
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{ |
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const uint32 page_size = getpagesize(); |
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const uint32 page_mask = page_size - 1; |
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return (size + page_mask) & ~page_mask; |
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} |
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|
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// Allocate memory on page boundary |
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static void * allocate_framebuffer(uint32 size, uint8 * hint = 0) |
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{ |
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// Remind that the system can allocate at 0x00000000... |
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return mmap((caddr_t)hint, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, zero_fd, 0); |
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} |
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|
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|
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/* |
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* Screen depth identification |
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*/ |
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|
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enum { |
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ID_DEPTH_UNKNOWN = -1, |
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ID_DEPTH_1, |
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ID_DEPTH_8, |
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ID_DEPTH_15, |
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ID_DEPTH_16, |
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ID_DEPTH_24, |
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ID_DEPTH_32 = ID_DEPTH_24, |
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ID_DEPTH_COUNT |
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}; |
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|
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static int depth_id(int depth) |
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{ |
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int id; |
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switch (depth) { |
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case 1 : id = ID_DEPTH_1; break; |
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case 8 : id = ID_DEPTH_8; break; |
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case 15 : id = ID_DEPTH_15; break; |
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case 16 : id = ID_DEPTH_16; break; |
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case 24 : id = ID_DEPTH_24; break; |
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case 32 : id = ID_DEPTH_32; break; |
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default : id = ID_DEPTH_UNKNOWN; |
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} |
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return id; |
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} |
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|
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|
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/* |
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* Frame buffer copy function templates |
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*/ |
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|
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// No conversion required |
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|
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#define MEMCPY_PROFITABLE |
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#ifdef MEMCPY_PROFITABLE |
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static void do_fbcopy_raw(uint8 * dest, const uint8 * source, uint32 length) |
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{ |
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memcpy(dest, source, length); |
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} |
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#else |
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#error "incomplete" |
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#define FB_BLIT_1(dst, src) (dst = (src)) |
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#define FB_BLIT_2(dst, src) (dst = (src)) |
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#define FB_DEPTH 0 |
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#define FB_FUNC_NAME do_fbcopy_raw |
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#include "video_blit.h" |
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#endif |
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|
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|
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// RGB 555 |
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|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME do_fbcopy_15_obo |
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#else |
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# define FB_FUNC_NAME do_fbcopy_15_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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// RGB 565 |
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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 do_fbcopy_16_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) & 0xff) | (((src) & 0x60) << 9))) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = ((((src) >> 6) & 0x00ff00ff) | (((src) & 0x00600060) << 9))) |
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|
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#define FB_DEPTH 16 |
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#define FB_FUNC_NAME do_fbcopy_16_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_DEPTH 16 |
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#define FB_FUNC_NAME do_fbcopy_16_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 do_fbcopy_16_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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// RGB 888 |
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|
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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME do_fbcopy_24_obo |
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#else |
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# define FB_FUNC_NAME do_fbcopy_24_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)) |
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|
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#define FB_BLIT_2(dst, src) \ |
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(dst = (((src) >> 24) & 0xff) | (((src) >> 16) & 0xff00) | (((src) & 0xff00) << 16) | (((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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/* |
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* Frame buffer copy functions map table |
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*/ |
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|
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typedef void (*fbcopy_func)(uint8 *, const uint8 *, uint32); |
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static fbcopy_func do_update_framebuffer; |
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|
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#define FBCOPY_FUNC(aHandler) do_ ## aHandler |
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|
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
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#define WD(X) { FBCOPY_FUNC(X), FBCOPY_FUNC(X) } |
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#else |
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#define WD(X) { FBCOPY_FUNC(fbcopy_raw), FBCOPY_FUNC(fbcopy_raw) } |
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#endif |
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|
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// fb_copy_funcs[depth_id][native_byte_order][dga_mode] |
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// NT : not tested |
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// OK : has been successfully tested |
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// NBO : native byte order |
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// OBO : opposite byte order |
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static fbcopy_func fbcopy_funcs[ID_DEPTH_COUNT][2][2] = { |
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#ifdef WORDS_BIGENDIAN |
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/* opposite byte order native byte order */ |
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/* 1 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // NT |
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/* 8 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // OK (NBO) |
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/* 15 bpp */ { WD(fbcopy_15_obo) , WD(fbcopy_raw) }, // NT |
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/* 16 bpp */ { WD(fbcopy_16_obo) , WD(fbcopy_16_nbo) }, // NT |
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/* 24 bpp */ { WD(fbcopy_24_obo) , WD(fbcopy_raw) } // NT |
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#else |
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/* opposite byte order native byte order */ |
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/* 1 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // NT |
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/* 8 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // OK (NBO) |
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/* 15 bpp */ { WD(fbcopy_raw) , WD(fbcopy_15_nbo) }, // OK (NBO) |
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/* 16 bpp */ { WD(fbcopy_16_obo) , WD(fbcopy_16_nbo) }, // OK (NBO) |
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/* 24 bpp */ { WD(fbcopy_raw) , WD(fbcopy_24_nbo) } // NT |
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#endif |
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}; |
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|
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#undef WD |
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|
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#define FBCOPY_FUNC_ERROR \ |
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ErrorAlert("Invalid screen depth") |
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|
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#define GET_FBCOPY_FUNC(aDepth, aNativeByteOrder, aDisplay) \ |
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((depth_id(aDepth) == ID_DEPTH_UNKNOWN) ? ( FBCOPY_FUNC_ERROR, (fbcopy_func)0 ) : \ |
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fbcopy_funcs[depth_id(aDepth)][(aNativeByteOrder)][(aDisplay) == DISPLAY_DGA ? 1 : 0]) |
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|
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|
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/* |
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* Screen fault handler |
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*/ |
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|
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static inline void do_handle_screen_fault(unsigned long addr) |
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{ |
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if ((addr < mainBuffer.memStart) || (addr >= mainBuffer.memEnd)) { |
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fprintf(stderr, "Segmentation fault at 0x%08X\n", addr); |
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abort(); |
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} |
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|
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const int page = (addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
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caddr_t page_ad = (caddr_t)(addr & ~(mainBuffer.pageSize - 1)); |
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#ifdef HAVE_PTHREADS |
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pthread_mutex_lock(&Screen_draw_lock); |
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#endif |
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PFLAG_SET(page); |
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mprotect(page_ad, mainBuffer.pageSize, PROT_READ | PROT_WRITE); |
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#ifdef HAVE_PTHREADS |
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pthread_mutex_unlock(&Screen_draw_lock); |
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#endif |
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} |
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|
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#if defined(HAVE_SIGINFO_T) |
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static void Screen_fault_handler(int, siginfo_t * sip, void *) |
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{ |
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D(bug("Screen_fault_handler: ADDR=0x%08X\n", sip->si_addr)); |
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do_handle_screen_fault((unsigned long)sip->si_addr); |
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} |
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#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
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# if defined(__i386__) && defined(__linux__) |
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static void Screen_fault_handler(int, struct sigcontext scs) |
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{ |
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D(bug("Screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", scs.cr2, scs.eip)); |
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do_handle_screen_fault((unsigned long)scs.cr2); |
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} |
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# else |
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# error "No suitable subterfuge for Video on SEGV signals" |
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# endif |
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#else |
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# error "Can't do Video on SEGV signals" |
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#endif |
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|
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|
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/* |
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* Screen fault handler initialization |
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*/ |
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|
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#if defined(HAVE_SIGINFO_T) |
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static bool Screen_fault_handler_init() |
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{ |
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// Setup SIGSEGV handler to process writes to frame buffer |
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sigemptyset(&vosf_sa.sa_mask); |
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vosf_sa.sa_sigaction = Screen_fault_handler; |
| 294 |
vosf_sa.sa_flags = 0; |
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return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
| 296 |
} |
| 297 |
#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
| 298 |
static bool Screen_fault_handler_init() |
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{ |
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// Setup SIGSEGV handler to process writes to frame buffer |
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sigemptyset(&vosf_sa.sa_mask); |
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vosf_sa.sa_handler = (void (*)(int)) Screen_fault_handler; |
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vosf_sa.sa_flags = 0; |
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return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
| 305 |
} |
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#endif |
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|
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|
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/* |
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* Update display for Windowed mode and VOSF |
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*/ |
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|
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static inline void update_display_window_vosf(void) |
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{ |
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int page = 0; |
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for (;;) { |
| 317 |
while (PFLAG_ISCLEAR_4(page)) |
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page += 4; |
| 319 |
|
| 320 |
while (PFLAG_ISCLEAR(page)) |
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page++; |
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|
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if (page >= mainBuffer.pageCount) |
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break; |
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|
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const int first_page = page; |
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PFLAG_CLEAR(first_page); |
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while ((++page < mainBuffer.pageCount) && PFLAG_ISSET(page)) |
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PFLAG_CLEAR(page); |
| 330 |
|
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// Make the dirty pages read-only again |
| 332 |
const int32 offset = first_page << mainBuffer.pageBits; |
| 333 |
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
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mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
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|
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// There is at least one line to update |
| 337 |
const int y1 = mainBuffer.pageInfo[first_page].top; |
| 338 |
const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
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const int height = y2 - y1 + 1; |
| 340 |
|
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const int bytes_per_row = VideoMonitor.bytes_per_row; |
| 342 |
const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
| 343 |
int i, j; |
| 344 |
|
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// Check for first column from left and first column |
| 346 |
// from right that have changed |
| 347 |
int x1 = VideoMonitor.x * bytes_per_pixel - 1; |
| 348 |
for (j = y1; j <= y2; j++) { |
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uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 350 |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 351 |
for (i = 0; i < x1; i++) { |
| 352 |
if (p1[i] != p2[i]) { |
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x1 = i; |
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break; |
| 355 |
} |
| 356 |
} |
| 357 |
} |
| 358 |
x1 /= bytes_per_pixel; |
| 359 |
|
| 360 |
int x2 = x1 * bytes_per_pixel; |
| 361 |
for (j = y2; j >= y1; j--) { |
| 362 |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 363 |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 364 |
for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
| 365 |
if (p1[i] != p2[i]) { |
| 366 |
x2 = i; |
| 367 |
break; |
| 368 |
} |
| 369 |
} |
| 370 |
} |
| 371 |
x2 /= bytes_per_pixel; |
| 372 |
|
| 373 |
// Update the_host_buffer and copy of the_buffer |
| 374 |
// There is at least one pixel to copy |
| 375 |
const int width = x2 - x1 + 1; |
| 376 |
i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
| 377 |
for (j = y1; j <= y2; j++) { |
| 378 |
do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
| 379 |
memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
| 380 |
i += bytes_per_row; |
| 381 |
} |
| 382 |
|
| 383 |
if (have_shm) |
| 384 |
XShmPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height, 0); |
| 385 |
else |
| 386 |
XPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height); |
| 387 |
} |
| 388 |
} |
| 389 |
|
| 390 |
|
| 391 |
/* |
| 392 |
* Update display for DGA mode and VOSF |
| 393 |
* (only in Direct Addressing mode) |
| 394 |
*/ |
| 395 |
|
| 396 |
#if REAL_ADDRESSING || DIRECT_ADDRESSING |
| 397 |
static inline void update_display_dga_vosf(void) |
| 398 |
{ |
| 399 |
int page = 0; |
| 400 |
for (;;) { |
| 401 |
while (PFLAG_ISCLEAR_4(page)) |
| 402 |
page += 4; |
| 403 |
|
| 404 |
while (PFLAG_ISCLEAR(page)) |
| 405 |
page++; |
| 406 |
|
| 407 |
if (page >= mainBuffer.pageCount) |
| 408 |
break; |
| 409 |
|
| 410 |
const int first_page = page; |
| 411 |
PFLAG_CLEAR(first_page); |
| 412 |
while ((++page < mainBuffer.pageCount) && PFLAG_ISSET(page)) |
| 413 |
PFLAG_CLEAR(page); |
| 414 |
|
| 415 |
// Make the dirty pages read-only again |
| 416 |
const int32 offset = first_page << mainBuffer.pageBits; |
| 417 |
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
| 418 |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
| 419 |
|
| 420 |
// I am sure that y2 >= y1 and depth != 1 |
| 421 |
const int y1 = mainBuffer.pageInfo[first_page].top; |
| 422 |
const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
| 423 |
|
| 424 |
const int bytes_per_row = VideoMonitor.bytes_per_row; |
| 425 |
const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
| 426 |
int i, j; |
| 427 |
|
| 428 |
// Check for first column from left and first column |
| 429 |
// from right that have changed |
| 430 |
int x1 = VideoMonitor.x * bytes_per_pixel - 1; |
| 431 |
for (j = y1; j <= y2; j++) { |
| 432 |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 433 |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 434 |
for (i = 0; i < x1; i++) { |
| 435 |
if (p1[i] != p2[i]) { |
| 436 |
x1 = i; |
| 437 |
break; |
| 438 |
} |
| 439 |
} |
| 440 |
} |
| 441 |
x1 /= bytes_per_pixel; |
| 442 |
|
| 443 |
int x2 = x1 * bytes_per_pixel; |
| 444 |
for (j = y2; j >= y1; j--) { |
| 445 |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 446 |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 447 |
for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
| 448 |
if (p1[i] != p2[i]) { |
| 449 |
x2 = i; |
| 450 |
break; |
| 451 |
} |
| 452 |
} |
| 453 |
} |
| 454 |
x2 /= bytes_per_pixel; |
| 455 |
|
| 456 |
// Update the_host_buffer and copy of the_buffer |
| 457 |
// There should be at least one pixel to copy |
| 458 |
const int width = x2 - x1 + 1; |
| 459 |
i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
| 460 |
for (j = y1; j <= y2; j++) { |
| 461 |
do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
| 462 |
memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
| 463 |
i += bytes_per_row; |
| 464 |
} |
| 465 |
} |
| 466 |
} |
| 467 |
#endif |
| 468 |
|
| 469 |
#endif /* ENABLE_VOSF */ |
| 470 |
|
| 471 |
#endif /* VIDEO_VOSF_H */ |
