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/* |
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* video_vosf.h - Video/graphics emulation, video on SEGV signals support |
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* |
4 |
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* Basilisk II (C) 1997-2000 Christian Bauer |
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* Basilisk II (C) 1997-2002 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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// 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 uintptr align_on_page_boundary(uintptr 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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#include <fcntl.h> |
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#include <sys/mman.h> |
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#include "sigsegv.h" |
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#include "vm_alloc.h" |
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|
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// Variables for Video on SEGV support |
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static uint8 *the_host_buffer; // Host frame buffer in VOSF mode |
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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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struct ScreenPageInfo { |
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int top, bottom; // Mapping between this virtual page and Mac scanlines |
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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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struct ScreenInfo { |
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uintptr memStart; // Start address aligned to page boundary |
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uint32 memLength; // Length of the memory addressed by the screen pages |
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|
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uintptr pageSize; // Size of a page |
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int pageBits; // Shift count to get the page number |
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uint32 pageCount; // Number of pages allocated to the screen |
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|
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bool dirty; // Flag: set if the frame buffer was touched |
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char * dirtyPages; // Table of flags set if page was altered |
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ScreenPageInfo * pageInfo; // Table of mappings page -> Mac scanlines |
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}; |
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|
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// No conversion required |
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static ScreenInfo mainBuffer; |
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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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#define PFLAG_SET_VALUE 0x00 |
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#define PFLAG_CLEAR_VALUE 0x01 |
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#define PFLAG_SET_VALUE_4 0x00000000 |
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#define PFLAG_CLEAR_VALUE_4 0x01010101 |
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#define PFLAG_SET(page) mainBuffer.dirtyPages[page] = PFLAG_SET_VALUE |
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#define PFLAG_CLEAR(page) mainBuffer.dirtyPages[page] = PFLAG_CLEAR_VALUE |
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#define PFLAG_ISSET(page) (mainBuffer.dirtyPages[page] == PFLAG_SET_VALUE) |
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#define PFLAG_ISCLEAR(page) (mainBuffer.dirtyPages[page] != PFLAG_SET_VALUE) |
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|
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#ifdef UNALIGNED_PROFITABLE |
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# define PFLAG_ISSET_4(page) (*((uint32 *)(mainBuffer.dirtyPages + (page))) == PFLAG_SET_VALUE_4) |
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# define PFLAG_ISCLEAR_4(page) (*((uint32 *)(mainBuffer.dirtyPages + (page))) == PFLAG_CLEAR_VALUE_4) |
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#else |
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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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# define PFLAG_ISSET_4(page) \ |
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PFLAG_ISSET(page ) && PFLAG_ISSET(page+1) \ |
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&& PFLAG_ISSET(page+2) && PFLAG_ISSET(page+3) |
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# define PFLAG_ISCLEAR_4(page) \ |
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PFLAG_ISCLEAR(page ) && PFLAG_ISCLEAR(page+1) \ |
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&& PFLAG_ISCLEAR(page+2) && PFLAG_ISCLEAR(page+3) |
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#endif |
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|
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// Set the selected page range [ first_page, last_page [ into the SET state |
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#define PFLAG_SET_RANGE(first_page, last_page) \ |
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memset(mainBuffer.dirtyPages + (first_page), PFLAG_SET_VALUE, \ |
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(last_page) - (first_page)) |
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|
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// Set the selected page range [ first_page, last_page [ into the CLEAR state |
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#define PFLAG_CLEAR_RANGE(first_page, last_page) \ |
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memset(mainBuffer.dirtyPages + (first_page), PFLAG_CLEAR_VALUE, \ |
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(last_page) - (first_page)) |
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|
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#define PFLAG_SET_ALL do { \ |
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PFLAG_SET_RANGE(0, mainBuffer.pageCount); \ |
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mainBuffer.dirty = true; \ |
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} while (0) |
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|
90 |
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#define PFLAG_CLEAR_ALL do { \ |
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PFLAG_CLEAR_RANGE(0, mainBuffer.pageCount); \ |
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mainBuffer.dirty = false; \ |
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} while (0) |
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|
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// Set the following macro definition to 1 if your system |
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// provides a really fast strchr() implementation |
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//#define HAVE_FAST_STRCHR 0 |
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|
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static inline int find_next_page_set(int page) |
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{ |
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#if HAVE_FAST_STRCHR |
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char *match = strchr(mainBuffer.dirtyPages + page, PFLAG_SET_VALUE); |
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return match ? match - mainBuffer.dirtyPages : mainBuffer.pageCount; |
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#else |
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# define FB_FUNC_NAME do_fbcopy_15_nbo |
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while (PFLAG_ISCLEAR_4(page)) |
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page += 4; |
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while (PFLAG_ISCLEAR(page)) |
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page++; |
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return page; |
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#endif |
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} |
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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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static inline int find_next_page_clear(int page) |
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{ |
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#if HAVE_FAST_STRCHR |
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char *match = strchr(mainBuffer.dirtyPages + page, PFLAG_CLEAR_VALUE); |
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return match ? match - mainBuffer.dirtyPages : mainBuffer.pageCount; |
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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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while (PFLAG_ISSET_4(page)) |
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page += 4; |
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while (PFLAG_ISSET(page)) |
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page++; |
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return page; |
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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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#ifdef WORDS_BIGENDIAN |
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# define FB_FUNC_NAME do_fbcopy_24_obo |
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#ifdef HAVE_PTHREADS |
128 |
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static pthread_mutex_t vosf_lock = PTHREAD_MUTEX_INITIALIZER; // Mutex to protect frame buffer (dirtyPages in fact) |
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#define LOCK_VOSF pthread_mutex_lock(&vosf_lock); |
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#define UNLOCK_VOSF pthread_mutex_unlock(&vosf_lock); |
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#else |
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# define FB_FUNC_NAME do_fbcopy_24_nbo |
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#define LOCK_VOSF |
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#define UNLOCK_VOSF |
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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) >> 8) & 0xff00) | (((src) & 0xff00) << 8) | (((src) & 0xff) << 24)) |
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static int log_base_2(uint32 x) |
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{ |
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uint32 mask = 0x80000000; |
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int l = 31; |
140 |
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while (l >= 0 && (x & mask) == 0) { |
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mask >>= 1; |
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l--; |
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} |
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return l; |
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} |
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|
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#define FB_DEPTH 24 |
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#include "video_blit.h" |
147 |
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// Extend size to page boundary |
148 |
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static uint32 page_extend(uint32 size) |
149 |
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{ |
150 |
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const uint32 page_size = getpagesize(); |
151 |
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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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|
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/* |
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* Frame buffer copy functions map table |
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* Initialize the VOSF system (mainBuffer structure, SIGSEGV handler) |
158 |
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*/ |
159 |
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|
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typedef void (*fbcopy_func)(uint8 *, const uint8 *, uint32); |
196 |
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static fbcopy_func do_update_framebuffer; |
197 |
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|
198 |
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#define FBCOPY_FUNC(aHandler) do_ ## aHandler |
199 |
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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 |
203 |
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#define WD(X) { FBCOPY_FUNC(fbcopy_raw), FBCOPY_FUNC(fbcopy_raw) } |
204 |
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#endif |
205 |
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|
206 |
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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 |
209 |
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// NBO : native byte order |
210 |
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// OBO : opposite byte order |
211 |
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static fbcopy_func fbcopy_funcs[ID_DEPTH_COUNT][2][2] = { |
212 |
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#ifdef WORDS_BIGENDIAN |
213 |
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/* opposite byte order native byte order */ |
214 |
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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) |
216 |
< |
/* 15 bpp */ { WD(fbcopy_15_obo) , WD(fbcopy_raw) }, // NT |
217 |
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/* 16 bpp */ { WD(fbcopy_16_obo) , WD(fbcopy_16_nbo) }, // NT |
218 |
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/* 24 bpp */ { WD(fbcopy_24_obo) , WD(fbcopy_raw) } // NT |
219 |
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#else |
220 |
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/* opposite byte order native byte order */ |
221 |
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/* 1 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // NT |
222 |
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/* 8 bpp */ { WD(fbcopy_raw) , WD(fbcopy_raw) }, // OK (NBO) |
223 |
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/* 15 bpp */ { WD(fbcopy_raw) , WD(fbcopy_15_nbo) }, // OK (NBO) |
224 |
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/* 16 bpp */ { WD(fbcopy_16_obo) , WD(fbcopy_16_nbo) }, // OK (NBO) |
225 |
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/* 24 bpp */ { WD(fbcopy_raw) , WD(fbcopy_24_nbo) } // NT |
226 |
< |
#endif |
227 |
< |
}; |
228 |
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|
229 |
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#undef WD |
160 |
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static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction); |
161 |
|
|
162 |
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#define FBCOPY_FUNC_ERROR \ |
232 |
< |
ErrorAlert("Invalid screen depth") |
233 |
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|
234 |
< |
#define GET_FBCOPY_FUNC(aDepth, aNativeByteOrder, aDisplay) \ |
235 |
< |
((depth_id(aDepth) == ID_DEPTH_UNKNOWN) ? ( FBCOPY_FUNC_ERROR, (fbcopy_func)0 ) : \ |
236 |
< |
fbcopy_funcs[depth_id(aDepth)][(aNativeByteOrder)][(aDisplay) == DISPLAY_DGA ? 1 : 0]) |
237 |
< |
|
238 |
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|
239 |
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/* |
240 |
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* Screen fault handler |
241 |
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*/ |
242 |
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|
243 |
< |
static inline void do_handle_screen_fault(uintptr addr) |
162 |
> |
static bool video_vosf_init(X11_monitor_desc &monitor) |
163 |
|
{ |
164 |
< |
if ((addr < mainBuffer.memStart) || (addr >= mainBuffer.memEnd)) { |
165 |
< |
fprintf(stderr, "Segmentation fault at 0x%08X\n", addr); |
166 |
< |
abort(); |
164 |
> |
const video_mode &mode = monitor.get_current_mode(); |
165 |
> |
|
166 |
> |
const uintptr page_size = getpagesize(); |
167 |
> |
const uintptr page_mask = page_size - 1; |
168 |
> |
|
169 |
> |
// Round up frame buffer base to page boundary |
170 |
> |
mainBuffer.memStart = (((uintptr) the_buffer) + page_mask) & ~page_mask; |
171 |
> |
|
172 |
> |
// The frame buffer size shall already be aligned to page boundary (use page_extend) |
173 |
> |
mainBuffer.memLength = the_buffer_size; |
174 |
> |
|
175 |
> |
mainBuffer.pageSize = page_size; |
176 |
> |
mainBuffer.pageBits = log_base_2(mainBuffer.pageSize); |
177 |
> |
mainBuffer.pageCount = (mainBuffer.memLength + page_mask)/mainBuffer.pageSize; |
178 |
> |
|
179 |
> |
// The "2" more bytes requested are a safety net to insure the |
180 |
> |
// loops in the update routines will terminate. |
181 |
> |
// See "How can we deal with array overrun conditions ?" hereunder for further details. |
182 |
> |
mainBuffer.dirtyPages = (char *) malloc(mainBuffer.pageCount + 2); |
183 |
> |
if (mainBuffer.dirtyPages == NULL) |
184 |
> |
return false; |
185 |
> |
|
186 |
> |
PFLAG_CLEAR_ALL; |
187 |
> |
PFLAG_CLEAR(mainBuffer.pageCount); |
188 |
> |
PFLAG_SET(mainBuffer.pageCount+1); |
189 |
> |
|
190 |
> |
// Allocate and fill in pageInfo with start and end (inclusive) row in number of bytes |
191 |
> |
mainBuffer.pageInfo = (ScreenPageInfo *) malloc(mainBuffer.pageCount * sizeof(ScreenPageInfo)); |
192 |
> |
if (mainBuffer.pageInfo == NULL) |
193 |
> |
return false; |
194 |
> |
|
195 |
> |
uint32 a = 0; |
196 |
> |
for (unsigned i = 0; i < mainBuffer.pageCount; i++) { |
197 |
> |
unsigned y1 = a / mode.bytes_per_row; |
198 |
> |
if (y1 >= mode.y) |
199 |
> |
y1 = mode.y - 1; |
200 |
> |
|
201 |
> |
unsigned y2 = (a + mainBuffer.pageSize) / mode.bytes_per_row; |
202 |
> |
if (y2 >= mode.y) |
203 |
> |
y2 = mode.y - 1; |
204 |
> |
|
205 |
> |
mainBuffer.pageInfo[i].top = y1; |
206 |
> |
mainBuffer.pageInfo[i].bottom = y2; |
207 |
> |
|
208 |
> |
a += mainBuffer.pageSize; |
209 |
> |
if (a > mainBuffer.memLength) |
210 |
> |
a = mainBuffer.memLength; |
211 |
|
} |
212 |
|
|
213 |
< |
const int page = (addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
214 |
< |
caddr_t page_ad = (caddr_t)(addr & ~(mainBuffer.pageSize - 1)); |
215 |
< |
#ifdef HAVE_PTHREADS |
216 |
< |
pthread_mutex_lock(&Screen_draw_lock); |
217 |
< |
#endif |
218 |
< |
PFLAG_SET(page); |
219 |
< |
mprotect(page_ad, mainBuffer.pageSize, PROT_READ | PROT_WRITE); |
220 |
< |
#ifdef HAVE_PTHREADS |
221 |
< |
pthread_mutex_unlock(&Screen_draw_lock); |
222 |
< |
#endif |
223 |
< |
} |
261 |
< |
|
262 |
< |
#if defined(HAVE_SIGINFO_T) |
263 |
< |
|
264 |
< |
static void Screen_fault_handler(int, siginfo_t * sip, void *) |
265 |
< |
{ |
266 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X\n", sip->si_addr)); |
267 |
< |
do_handle_screen_fault((uintptr)sip->si_addr); |
213 |
> |
// We can now write-protect the frame buffer |
214 |
> |
if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0) |
215 |
> |
return false; |
216 |
> |
|
217 |
> |
// Initialize the handler for SIGSEGV |
218 |
> |
if (!sigsegv_install_handler(screen_fault_handler)) |
219 |
> |
return false; |
220 |
> |
|
221 |
> |
// The frame buffer is sane, i.e. there is no write to it yet |
222 |
> |
mainBuffer.dirty = false; |
223 |
> |
return true; |
224 |
|
} |
225 |
|
|
270 |
– |
#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
271 |
– |
|
272 |
– |
# if defined(__i386__) && defined(__linux__) |
273 |
– |
static void Screen_fault_handler(int, struct sigcontext scs) |
274 |
– |
{ |
275 |
– |
D(bug("Screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", scs.cr2, scs.eip)); |
276 |
– |
do_handle_screen_fault((uintptr)scs.cr2); |
277 |
– |
} |
226 |
|
|
227 |
< |
# elif defined(__m68k__) && defined(__NetBSD__) |
227 |
> |
/* |
228 |
> |
* Deinitialize VOSF system |
229 |
> |
*/ |
230 |
|
|
231 |
< |
# include <m68k/frame.h> |
282 |
< |
static void Screen_fault_handler(int, int code, struct sigcontext *scp) |
231 |
> |
static void video_vosf_exit(void) |
232 |
|
{ |
233 |
< |
D(bug("Screen_fault_handler: ADDR=0x%08X\n", code)); |
234 |
< |
struct sigstate { |
235 |
< |
int ss_flags; |
236 |
< |
struct frame ss_frame; |
237 |
< |
}; |
238 |
< |
struct sigstate *state = (struct sigstate *)scp->sc_ap; |
239 |
< |
uintptr fault_addr; |
291 |
< |
switch (state->ss_frame.f_format) { |
292 |
< |
case 7: // 68040 access error |
293 |
< |
// "code" is sometimes unreliable (i.e. contains NULL or a bogus address), reason unknown |
294 |
< |
fault_addr = state->ss_frame.f_fmt7.f_fa; |
295 |
< |
break; |
296 |
< |
default: |
297 |
< |
fault_addr = (uintptr)code; |
298 |
< |
break; |
233 |
> |
if (mainBuffer.pageInfo) { |
234 |
> |
free(mainBuffer.pageInfo); |
235 |
> |
mainBuffer.pageInfo = NULL; |
236 |
> |
} |
237 |
> |
if (mainBuffer.dirtyPages) { |
238 |
> |
free(mainBuffer.dirtyPages); |
239 |
> |
mainBuffer.dirtyPages = NULL; |
240 |
|
} |
300 |
– |
do_handle_screen_fault(fault_addr); |
241 |
|
} |
242 |
|
|
303 |
– |
# else |
304 |
– |
# error "No suitable subterfuge for Video on SEGV signals" |
305 |
– |
# endif |
306 |
– |
#else |
307 |
– |
# error "Can't do Video on SEGV signals" |
308 |
– |
#endif |
309 |
– |
|
243 |
|
|
244 |
|
/* |
245 |
< |
* Screen fault handler initialization |
245 |
> |
* Screen fault handler |
246 |
|
*/ |
247 |
|
|
248 |
< |
#if defined(HAVE_SIGINFO_T) |
316 |
< |
static bool Screen_fault_handler_init() |
317 |
< |
{ |
318 |
< |
// Setup SIGSEGV handler to process writes to frame buffer |
319 |
< |
sigemptyset(&vosf_sa.sa_mask); |
320 |
< |
vosf_sa.sa_sigaction = Screen_fault_handler; |
321 |
< |
vosf_sa.sa_flags = SA_SIGINFO; |
322 |
< |
return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
323 |
< |
} |
324 |
< |
#elif defined(HAVE_SIGCONTEXT_SUBTERFUGE) |
325 |
< |
static bool Screen_fault_handler_init() |
248 |
> |
static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction) |
249 |
|
{ |
250 |
< |
// Setup SIGSEGV handler to process writes to frame buffer |
251 |
< |
sigemptyset(&vosf_sa.sa_mask); |
252 |
< |
vosf_sa.sa_handler = (void (*)(int)) Screen_fault_handler; |
253 |
< |
#if !EMULATED_68K && defined(__NetBSD__) |
254 |
< |
sigaddset(&vosf_sa.sa_mask, SIGALRM); |
255 |
< |
vosf_sa.sa_flags = SA_ONSTACK; |
256 |
< |
#else |
257 |
< |
vosf_sa.sa_flags = 0; |
258 |
< |
#endif |
259 |
< |
return (sigaction(SIGSEGV, &vosf_sa, NULL) == 0); |
250 |
> |
// D(bug("screen_fault_handler: ADDR=%p from IP=%p\n", fault_address, fault_instruction)); |
251 |
> |
const uintptr addr = (uintptr)fault_address; |
252 |
> |
|
253 |
> |
/* Someone attempted to write to the frame buffer. Make it writeable |
254 |
> |
* now so that the data could actually be written to. It will be made |
255 |
> |
* read-only back in one of the screen update_*() functions. |
256 |
> |
*/ |
257 |
> |
if (((uintptr)addr - mainBuffer.memStart) < mainBuffer.memLength) { |
258 |
> |
const int page = ((uintptr)addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
259 |
> |
LOCK_VOSF; |
260 |
> |
PFLAG_SET(page); |
261 |
> |
vm_protect((char *)(addr & -mainBuffer.pageSize), mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE); |
262 |
> |
mainBuffer.dirty = true; |
263 |
> |
UNLOCK_VOSF; |
264 |
> |
return true; |
265 |
> |
} |
266 |
> |
|
267 |
> |
/* Otherwise, we don't know how to handle the fault, let it crash */ |
268 |
> |
return false; |
269 |
|
} |
338 |
– |
#endif |
270 |
|
|
271 |
|
|
272 |
|
/* |
273 |
|
* Update display for Windowed mode and VOSF |
274 |
|
*/ |
275 |
|
|
276 |
< |
static inline void update_display_window_vosf(void) |
276 |
> |
// From video_blit.cpp |
277 |
> |
extern void (*Screen_blit)(uint8 * dest, const uint8 * source, uint32 length); |
278 |
> |
extern bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order, video_depth mac_depth); |
279 |
> |
extern uint32 ExpandMap[256]; |
280 |
> |
|
281 |
> |
/* How can we deal with array overrun conditions ? |
282 |
> |
|
283 |
> |
The state of the framebuffer pages that have been touched are maintained |
284 |
> |
in the dirtyPages[] table. That table is (pageCount + 2) bytes long. |
285 |
> |
|
286 |
> |
Terminology |
287 |
> |
|
288 |
> |
"Last Page" denotes the pageCount-nth page, i.e. dirtyPages[pageCount - 1]. |
289 |
> |
"CLEAR Page Guard" refers to the page following the Last Page but is always |
290 |
> |
in the CLEAR state. "SET Page Guard" refers to the page following the CLEAR |
291 |
> |
Page Guard but is always in the SET state. |
292 |
> |
|
293 |
> |
Rough process |
294 |
> |
|
295 |
> |
The update routines must determine which pages have to be blitted to the |
296 |
> |
screen. This job consists in finding the first_page that was touched. |
297 |
> |
i.e. find the next page that is SET. Then, finding how many pages were |
298 |
> |
touched starting from first_page. i.e. find the next page that is CLEAR. |
299 |
> |
|
300 |
> |
There are two cases to check: |
301 |
> |
|
302 |
> |
- Last Page is CLEAR: find_next_page_set() will reach the SET Page Guard |
303 |
> |
but it is beyond the valid pageCount value. Therefore, we exit from the |
304 |
> |
update routine. |
305 |
> |
|
306 |
> |
- Last Page is SET: first_page equals (pageCount - 1) and |
307 |
> |
find_next_page_clear() will reach the CLEAR Page Guard. We blit the last |
308 |
> |
page to the screen. On the next iteration, page equals pageCount and |
309 |
> |
find_next_page_set() will reach the SET Page Guard. We still safely exit |
310 |
> |
from the update routine because the SET Page Guard position is greater |
311 |
> |
than pageCount. |
312 |
> |
*/ |
313 |
> |
|
314 |
> |
static inline void update_display_window_vosf(driver_window *drv) |
315 |
|
{ |
316 |
+ |
const video_mode &mode = drv->monitor.get_current_mode(); |
317 |
+ |
|
318 |
|
int page = 0; |
319 |
|
for (;;) { |
320 |
< |
while (PFLAG_ISCLEAR_4(page)) |
321 |
< |
page += 4; |
351 |
< |
|
352 |
< |
while (PFLAG_ISCLEAR(page)) |
353 |
< |
page++; |
354 |
< |
|
355 |
< |
if (page >= mainBuffer.pageCount) |
320 |
> |
const unsigned first_page = find_next_page_set(page); |
321 |
> |
if (first_page >= mainBuffer.pageCount) |
322 |
|
break; |
323 |
< |
|
324 |
< |
const int first_page = page; |
325 |
< |
while ((page < mainBuffer.pageCount) && PFLAG_ISSET(page)) { |
360 |
< |
PFLAG_CLEAR(page); |
361 |
< |
++page; |
362 |
< |
} |
323 |
> |
|
324 |
> |
page = find_next_page_clear(first_page); |
325 |
> |
PFLAG_CLEAR_RANGE(first_page, page); |
326 |
|
|
327 |
|
// Make the dirty pages read-only again |
328 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
329 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
330 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
330 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
331 |
|
|
332 |
|
// There is at least one line to update |
333 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
334 |
|
const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
335 |
|
const int height = y2 - y1 + 1; |
336 |
|
|
337 |
< |
const int bytes_per_row = VideoMonitor.bytes_per_row; |
375 |
< |
const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
376 |
< |
int i, j; |
377 |
< |
|
378 |
< |
// Check for first column from left and first column |
379 |
< |
// from right that have changed |
380 |
< |
int x1, x2, width; |
381 |
< |
if (depth == 1) { |
382 |
< |
|
383 |
< |
x1 = VideoMonitor.x - 1; |
384 |
< |
for (j = y1; j <= y2; j++) { |
385 |
< |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
386 |
< |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
387 |
< |
for (i = 0; i < (x1>>3); i++) { |
388 |
< |
if (p1[i] != p2[i]) { |
389 |
< |
x1 = i << 3; |
390 |
< |
break; |
391 |
< |
} |
392 |
< |
} |
393 |
< |
} |
394 |
< |
|
395 |
< |
x2 = x1; |
396 |
< |
for (j = y2; j >= y1; j--) { |
397 |
< |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
398 |
< |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
399 |
< |
for (i = (VideoMonitor.x>>3) - 1; i > (x2>>3); i--) { |
400 |
< |
if (p1[i] != p2[i]) { |
401 |
< |
x2 = (i << 3) + 7; |
402 |
< |
break; |
403 |
< |
} |
404 |
< |
} |
405 |
< |
} |
406 |
< |
width = x2 - x1 + 1; |
337 |
> |
if (mode.depth < VDEPTH_8BIT) { |
338 |
|
|
339 |
|
// Update the_host_buffer and copy of the_buffer |
340 |
< |
i = y1 * bytes_per_row + (x1 >> 3); |
340 |
> |
const int src_bytes_per_row = mode.bytes_per_row; |
341 |
> |
const int dst_bytes_per_row = drv->img->bytes_per_line; |
342 |
> |
const int pixels_per_byte = mode.x / src_bytes_per_row; |
343 |
> |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
344 |
|
for (j = y1; j <= y2; j++) { |
345 |
< |
do_update_framebuffer(the_host_buffer + i, the_buffer + i, width >> 3); |
346 |
< |
memcpy(the_buffer_copy + i, the_buffer + i, width >> 3); |
347 |
< |
i += bytes_per_row; |
345 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, mode.x / pixels_per_byte); |
346 |
> |
i1 += src_bytes_per_row; |
347 |
> |
i2 += dst_bytes_per_row; |
348 |
|
} |
349 |
|
|
350 |
|
} else { |
351 |
|
|
418 |
– |
x1 = VideoMonitor.x * bytes_per_pixel - 1; |
419 |
– |
for (j = y1; j <= y2; j++) { |
420 |
– |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
421 |
– |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
422 |
– |
for (i = 0; i < x1; i++) { |
423 |
– |
if (p1[i] != p2[i]) { |
424 |
– |
x1 = i; |
425 |
– |
break; |
426 |
– |
} |
427 |
– |
} |
428 |
– |
} |
429 |
– |
x1 /= bytes_per_pixel; |
430 |
– |
|
431 |
– |
x2 = x1 * bytes_per_pixel; |
432 |
– |
for (j = y2; j >= y1; j--) { |
433 |
– |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
434 |
– |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
435 |
– |
for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
436 |
– |
if (p1[i] != p2[i]) { |
437 |
– |
x2 = i; |
438 |
– |
break; |
439 |
– |
} |
440 |
– |
} |
441 |
– |
} |
442 |
– |
x2 /= bytes_per_pixel; |
443 |
– |
width = x2 - x1 + 1; |
444 |
– |
|
352 |
|
// Update the_host_buffer and copy of the_buffer |
353 |
< |
i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
353 |
> |
const int src_bytes_per_row = mode.bytes_per_row; |
354 |
> |
const int dst_bytes_per_row = drv->img->bytes_per_line; |
355 |
> |
const int bytes_per_pixel = src_bytes_per_row / mode.x; |
356 |
> |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
357 |
|
for (j = y1; j <= y2; j++) { |
358 |
< |
do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
359 |
< |
memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
360 |
< |
i += bytes_per_row; |
358 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, bytes_per_pixel * mode.x); |
359 |
> |
i1 += src_bytes_per_row; |
360 |
> |
i2 += dst_bytes_per_row; |
361 |
|
} |
362 |
|
} |
363 |
< |
|
364 |
< |
if (have_shm) |
365 |
< |
XShmPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height, 0); |
363 |
> |
|
364 |
> |
if (drv->have_shm) |
365 |
> |
XShmPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height, 0); |
366 |
|
else |
367 |
< |
XPutImage(x_display, the_win, the_gc, img, x1, y1, x1, y1, width, height); |
367 |
> |
XPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height); |
368 |
|
} |
369 |
+ |
mainBuffer.dirty = false; |
370 |
|
} |
371 |
|
|
372 |
|
|
373 |
|
/* |
374 |
|
* Update display for DGA mode and VOSF |
375 |
< |
* (only in Direct Addressing mode) |
375 |
> |
* (only in Real or Direct Addressing mode) |
376 |
|
*/ |
377 |
|
|
378 |
|
#if REAL_ADDRESSING || DIRECT_ADDRESSING |
379 |
|
static inline void update_display_dga_vosf(void) |
380 |
|
{ |
381 |
+ |
const video_mode &mode = drv->monitor.get_current_mode(); |
382 |
+ |
|
383 |
|
int page = 0; |
384 |
|
for (;;) { |
385 |
< |
while (PFLAG_ISCLEAR_4(page)) |
386 |
< |
page += 4; |
474 |
< |
|
475 |
< |
while (PFLAG_ISCLEAR(page)) |
476 |
< |
page++; |
477 |
< |
|
478 |
< |
if (page >= mainBuffer.pageCount) |
385 |
> |
const unsigned first_page = find_next_page_set(page); |
386 |
> |
if (first_page >= mainBuffer.pageCount) |
387 |
|
break; |
388 |
< |
|
389 |
< |
const int first_page = page; |
390 |
< |
while ((page < mainBuffer.pageCount) && PFLAG_ISSET(page)) { |
391 |
< |
PFLAG_CLEAR(page); |
484 |
< |
++page; |
485 |
< |
} |
486 |
< |
|
388 |
> |
|
389 |
> |
page = find_next_page_clear(first_page); |
390 |
> |
PFLAG_CLEAR_RANGE(first_page, page); |
391 |
> |
|
392 |
|
// Make the dirty pages read-only again |
393 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
394 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
395 |
< |
mprotect((caddr_t)(mainBuffer.memStart + offset), length, PROT_READ); |
395 |
> |
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
396 |
|
|
397 |
|
// I am sure that y2 >= y1 and depth != 1 |
398 |
|
const int y1 = mainBuffer.pageInfo[first_page].top; |
399 |
|
const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
400 |
|
|
401 |
< |
const int bytes_per_row = VideoMonitor.bytes_per_row; |
402 |
< |
const int bytes_per_pixel = VideoMonitor.bytes_per_row / VideoMonitor.x; |
401 |
> |
const int bytes_per_row = mode.bytes_per_row; |
402 |
> |
const int bytes_per_pixel = mode.bytes_per_row / mode.x; |
403 |
|
int i, j; |
404 |
|
|
405 |
|
// Check for first column from left and first column |
406 |
|
// from right that have changed |
407 |
< |
int x1 = VideoMonitor.x * bytes_per_pixel - 1; |
407 |
> |
int x1 = mode.x * bytes_per_pixel - 1; |
408 |
|
for (j = y1; j <= y2; j++) { |
409 |
|
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
410 |
|
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
421 |
|
for (j = y2; j >= y1; j--) { |
422 |
|
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
423 |
|
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
424 |
< |
for (i = VideoMonitor.x * bytes_per_pixel - 1; i > x2; i--) { |
424 |
> |
for (i = mode.x * bytes_per_pixel - 1; i > x2; i--) { |
425 |
|
if (p1[i] != p2[i]) { |
426 |
|
x2 = i; |
427 |
|
break; |
435 |
|
const int width = x2 - x1 + 1; |
436 |
|
i = y1 * bytes_per_row + x1 * bytes_per_pixel; |
437 |
|
for (j = y1; j <= y2; j++) { |
438 |
< |
do_update_framebuffer(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
438 |
> |
Screen_blit(the_host_buffer + i, the_buffer + i, bytes_per_pixel * width); |
439 |
|
memcpy(the_buffer_copy + i, the_buffer + i, bytes_per_pixel * width); |
440 |
|
i += bytes_per_row; |
441 |
|
} |
442 |
|
} |
443 |
+ |
mainBuffer.dirty = false; |
444 |
|
} |
445 |
|
#endif |
446 |
|
|