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/* |
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* video_vosf.h - Video/graphics emulation, video on SEGV signals support |
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* |
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* Basilisk II (C) 1997-2000 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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#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 8 |
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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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#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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#define FB_FUNC_NAME do_fbcopy_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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#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 |
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#include "video_blit.h" |
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|
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|
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// RGB 888 |
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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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#define FB_FUNC_NAME do_fbcopy_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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static fbcopy_func fbcopy_funcs[ID_DEPTH_COUNT][2][2] = { |
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#ifdef WORDS_BIGENDIAN |
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/* alt 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) , WD(fbcopy_raw) }, // NT |
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/* 16 bpp */ { WD(fbcopy_16) , WD(fbcopy_raw) }, // NT |
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/* 24 bpp */ { WD(fbcopy_24) , WD(fbcopy_raw) } // NT |
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#else |
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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) , WD(fbcopy_15) }, // OK (NBO) |
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/* 16 bpp */ { WD(fbcopy_16) , WD(fbcopy_16) }, // OK (NBO) |
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/* 24 bpp */ { WD(fbcopy_24) , WD(fbcopy_24) } // 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; |
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vosf_sa.sa_flags = 0; |
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return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
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} |
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#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
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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_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); |
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} |
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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 (;;) { |
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while (PFLAG_ISCLEAR_4(page)) |
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page += 4; |
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|
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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); |
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|
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// Make the dirty pages read-only again |
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const int32 offset = first_page << mainBuffer.pageBits; |
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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 |
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const int y1 = mainBuffer.pageInfo[first_page].top; |
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const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
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const int height = y2 - y1 + 1; |
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|
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const int bytes_per_row = VideoMonitor.bytes_per_row; |
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const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
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int i, j; |
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|
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// Check for first column from left and first column |
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// from right that have changed |
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int x1 = VideoMonitor.x * bytes_per_pixel - 1; |
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for (j = y1; j <= y2; j++) { |
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uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
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uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
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for (i = 0; i < x1; i++) { |
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if (p1[i] != p2[i]) { |
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x1 = i; |
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break; |
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} |
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} |
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} |
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x1 /= bytes_per_pixel; |
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|
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int x2 = x1 * bytes_per_pixel; |
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for (j = y2; j >= y1; j--) { |
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uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
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uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
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for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
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if (p1[i] != p2[i]) { |
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x2 = i; |
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break; |
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} |
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} |
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} |
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x2 /= bytes_per_pixel; |
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|
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// Update the_host_buffer and copy of the_buffer |
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// There is at least one pixel to copy |
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const int width = x2 - x1 + 1; |
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i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
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for (j = y1; j <= y2; j++) { |
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do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
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memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
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i += bytes_per_row; |
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} |
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|
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if (have_shm) |
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XShmPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height, 0); |
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else |
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XPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height); |
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} |
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} |
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|
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|
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/* |
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* Update display for DGA mode and VOSF |
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* (only in Direct Addressing mode) |
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*/ |
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|
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
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static inline void update_display_dga_vosf(void) |
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{ |
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int page = 0; |
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for (;;) { |
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while (PFLAG_ISCLEAR_4(page)) |
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page += 4; |
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|
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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); |
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|
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// Make the dirty pages read-only again |
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const int32 offset = first_page << mainBuffer.pageBits; |
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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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// I am sure that y2 >= y1 and depth != 1 |
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const int y1 = mainBuffer.pageInfo[first_page].top; |
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const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
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|
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const int bytes_per_row = VideoMonitor.bytes_per_row; |
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const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
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int i, j; |
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|
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// Check for first column from left and first column |
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// from right that have changed |
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int x1 = VideoMonitor.x * bytes_per_pixel - 1; |
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for (j = y1; j <= y2; j++) { |
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uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
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uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
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for (i = 0; i < x1; i++) { |
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if (p1[i] != p2[i]) { |
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x1 = i; |
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break; |
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} |
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} |
| 385 |
} |
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x1 /= bytes_per_pixel; |
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|
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int x2 = x1 * bytes_per_pixel; |
| 389 |
for (j = y2; j >= y1; j--) { |
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uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
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uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
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for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
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if (p1[i] != p2[i]) { |
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x2 = i; |
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break; |
| 396 |
} |
| 397 |
} |
| 398 |
} |
| 399 |
x2 /= bytes_per_pixel; |
| 400 |
|
| 401 |
// Update the_host_buffer and copy of the_buffer |
| 402 |
// There should be at least one pixel to copy |
| 403 |
const int width = x2 - x1 + 1; |
| 404 |
i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
| 405 |
for (j = y1; j <= y2; j++) { |
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do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
| 407 |
memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
| 408 |
i += bytes_per_row; |
| 409 |
} |
| 410 |
} |
| 411 |
} |
| 412 |
#endif |
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|
| 414 |
#endif /* ENABLE_VOSF */ |
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|
| 416 |
#endif /* VIDEO_VOSF_H */ |
