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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) 1997-2001 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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// 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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static uint32 the_buffer_size; // Size of allocated the_buffer |
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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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struct ScreenInfo { |
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uintptr memBase; // Real start address |
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uintptr memStart; // Start address aligned to page boundary |
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uintptr memEnd; // Address of one-past-the-end of the screen |
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uint32 memLength; // Length of the memory addressed by the screen pages |
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uint32 pageSize; // Size of a page |
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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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* Initialize mainBuffer structure |
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* Initialize the VOSF system (mainBuffer structure, SIGSEGV handler) |
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*/ |
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static bool video_init_buffer(void) |
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{ |
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if (use_vosf) { |
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const uint32 page_size = getpagesize(); |
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const uint32 page_mask = page_size - 1; |
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mainBuffer.memBase = (uintptr) the_buffer; |
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// Round up frame buffer base to page boundary |
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mainBuffer.memStart = (uintptr)((((unsigned long) the_buffer) + page_mask) & ~page_mask); |
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mainBuffer.memLength = the_buffer_size; |
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mainBuffer.memEnd = mainBuffer.memStart + mainBuffer.memLength; |
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mainBuffer.pageSize = page_size; |
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mainBuffer.pageCount = (mainBuffer.memLength + page_mask)/mainBuffer.pageSize; |
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mainBuffer.pageBits = log_base_2(mainBuffer.pageSize); |
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|
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if (mainBuffer.dirtyPages) { |
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free(mainBuffer.dirtyPages); |
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mainBuffer.dirtyPages = NULL; |
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} |
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static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction); |
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mainBuffer.dirtyPages = (char *) malloc(mainBuffer.pageCount + 2); |
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static bool video_vosf_init(X11_monitor_desc &monitor) |
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{ |
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const video_mode &mode = monitor.get_current_mode(); |
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if (mainBuffer.pageInfo) { |
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free(mainBuffer.pageInfo); |
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mainBuffer.pageInfo = NULL; |
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} |
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const uintptr page_size = getpagesize(); |
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const uintptr page_mask = page_size - 1; |
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|
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// Round up frame buffer base to page boundary |
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mainBuffer.memStart = (((uintptr) the_buffer) + page_mask) & ~page_mask; |
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|
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// The frame buffer size shall already be aligned to page boundary (use page_extend) |
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mainBuffer.memLength = the_buffer_size; |
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|
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mainBuffer.pageSize = page_size; |
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mainBuffer.pageBits = log_base_2(mainBuffer.pageSize); |
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mainBuffer.pageCount = (mainBuffer.memLength + page_mask)/mainBuffer.pageSize; |
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|
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// The "2" more bytes requested are a safety net to insure the |
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// loops in the update routines will terminate. |
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// See "How can we deal with array overrun conditions ?" hereunder for further details. |
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mainBuffer.dirtyPages = (char *) malloc(mainBuffer.pageCount + 2); |
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if (mainBuffer.dirtyPages == NULL) |
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return false; |
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|
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PFLAG_CLEAR_ALL; |
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PFLAG_CLEAR(mainBuffer.pageCount); |
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PFLAG_SET(mainBuffer.pageCount+1); |
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|
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// Allocate and fill in pageInfo with start and end (inclusive) row in number of bytes |
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mainBuffer.pageInfo = (ScreenPageInfo *) malloc(mainBuffer.pageCount * sizeof(ScreenPageInfo)); |
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if (mainBuffer.pageInfo == NULL) |
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return false; |
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|
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uint32 a = 0; |
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for (unsigned i = 0; i < mainBuffer.pageCount; i++) { |
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unsigned y1 = a / mode.bytes_per_row; |
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if (y1 >= mode.y) |
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y1 = mode.y - 1; |
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|
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unsigned y2 = (a + mainBuffer.pageSize) / mode.bytes_per_row; |
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if (y2 >= mode.y) |
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y2 = mode.y - 1; |
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mainBuffer.pageInfo[i].top = y1; |
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mainBuffer.pageInfo[i].bottom = y2; |
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a += mainBuffer.pageSize; |
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if (a > mainBuffer.memLength) |
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a = mainBuffer.memLength; |
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} |
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// We can now write-protect the frame buffer |
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if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0) |
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return false; |
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|
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// Initialize the handler for SIGSEGV |
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if (!sigsegv_install_handler(screen_fault_handler)) |
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return false; |
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// The frame buffer is sane, i.e. there is no write to it yet |
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mainBuffer.dirty = false; |
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return true; |
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} |
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mainBuffer.pageInfo = (ScreenPageInfo *) malloc(mainBuffer.pageCount * sizeof(ScreenPageInfo)); |
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if ((mainBuffer.dirtyPages == 0) || (mainBuffer.pageInfo == 0)) |
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return false; |
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mainBuffer.dirty = false; |
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/* |
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* Deinitialize VOSF system |
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*/ |
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PFLAG_CLEAR_ALL; |
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// Safety net to insure the loops in the update routines will terminate |
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// See "How can we deal with array overrun conditions ?" hereunder for further details |
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PFLAG_CLEAR(mainBuffer.pageCount); |
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PFLAG_SET(mainBuffer.pageCount+1); |
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uint32 a = 0; |
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for (int i = 0; i < mainBuffer.pageCount; i++) { |
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int y1 = a / VideoMonitor.mode.bytes_per_row; |
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if (y1 >= VideoMonitor.mode.y) |
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y1 = VideoMonitor.mode.y - 1; |
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int y2 = (a + mainBuffer.pageSize) / VideoMonitor.mode.bytes_per_row; |
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if (y2 >= VideoMonitor.mode.y) |
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y2 = VideoMonitor.mode.y - 1; |
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mainBuffer.pageInfo[i].top = y1; |
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mainBuffer.pageInfo[i].bottom = y2; |
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a += mainBuffer.pageSize; |
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if (a > mainBuffer.memLength) |
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a = mainBuffer.memLength; |
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} |
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|
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// We can now write-protect the frame buffer |
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if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0) |
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return false; |
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static void video_vosf_exit(void) |
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{ |
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if (mainBuffer.pageInfo) { |
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free(mainBuffer.pageInfo); |
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mainBuffer.pageInfo = NULL; |
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} |
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if (mainBuffer.dirtyPages) { |
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free(mainBuffer.dirtyPages); |
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mainBuffer.dirtyPages = NULL; |
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} |
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return true; |
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} |
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static bool screen_fault_handler(sigsegv_address_t fault_address, sigsegv_address_t fault_instruction) |
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{ |
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D(bug("screen_fault_handler: ADDR=0x%08X from IP=0x%08X\n", fault_address, fault_instruction)); |
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// D(bug("screen_fault_handler: ADDR=%p from IP=%p\n", fault_address, fault_instruction)); |
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const uintptr addr = (uintptr)fault_address; |
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/* Someone attempted to write to the frame buffer. Make it writeable |
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* now so that the data could actually be written to. It will be made |
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* read-only back in one of the screen update_*() functions. |
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*/ |
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if ((addr >= mainBuffer.memStart) && (addr < mainBuffer.memEnd)) { |
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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); |
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> |
if (((uintptr)addr - mainBuffer.memStart) < mainBuffer.memLength) { |
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const int page = ((uintptr)addr - mainBuffer.memStart) >> mainBuffer.pageBits; |
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LOCK_VOSF; |
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PFLAG_SET(page); |
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vm_protect((char *)page_ad, mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE); |
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vm_protect((char *)(addr & -mainBuffer.pageSize), mainBuffer.pageSize, VM_PAGE_READ | VM_PAGE_WRITE); |
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mainBuffer.dirty = true; |
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UNLOCK_VOSF; |
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return true; |
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} |
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/* Otherwise, we don't know how to handle the fault, let it crash */ |
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< |
fprintf(stderr, "do_handle_screen_fault: unhandled address 0x%08X", addr); |
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> |
fprintf(stderr, "do_handle_screen_fault: unhandled address %p", fault_address); |
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if (fault_instruction != SIGSEGV_INVALID_PC) |
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fprintf(stderr, " [IP=0x%08X]", fault_instruction); |
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> |
fprintf(stderr, " [IP=%p]", fault_instruction); |
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fprintf(stderr, "\n"); |
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#if EMULATED_68K |
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uaecptr nextpc; |
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extern void m68k_dumpstate(uaecptr *nextpc); |
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m68k_dumpstate(&nextpc); |
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#endif |
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VideoQuitFullScreen(); |
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#ifdef ENABLE_MON |
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char *arg[4] = {"mon", "-m", "-r", NULL}; |
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mon(3, arg); |
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// From video_blit.cpp |
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extern void (*Screen_blit)(uint8 * dest, const uint8 * source, uint32 length); |
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< |
extern bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order); |
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> |
extern bool Screen_blitter_init(XVisualInfo * visual_info, bool native_byte_order, video_depth mac_depth); |
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> |
extern uint32 ExpandMap[256]; |
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|
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/* How can we deal with array overrun conditions ? |
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than pageCount. |
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*/ |
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< |
static inline void update_display_window_vosf(void) |
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> |
static inline void update_display_window_vosf(driver_window *drv) |
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{ |
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+ |
const video_mode &mode = drv->monitor.get_current_mode(); |
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+ |
|
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int page = 0; |
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for (;;) { |
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< |
const int first_page = find_next_page_set(page); |
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> |
const unsigned first_page = find_next_page_set(page); |
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if (first_page >= mainBuffer.pageCount) |
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break; |
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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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< |
const int bytes_per_row = VideoMonitor.mode.bytes_per_row; |
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< |
const int bytes_per_pixel = VideoMonitor.mode.bytes_per_row / VideoMonitor.mode.x; |
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< |
int i = y1 * bytes_per_row, j; |
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< |
|
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< |
if (VideoMonitor.mode.depth == VDEPTH_1BIT) { |
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> |
if (mode.depth < VDEPTH_8BIT) { |
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|
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// Update the_host_buffer and copy of the_buffer |
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+ |
const int src_bytes_per_row = mode.bytes_per_row; |
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+ |
const int dst_bytes_per_row = drv->img->bytes_per_line; |
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+ |
const int pixels_per_byte = mode.x / src_bytes_per_row; |
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+ |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
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for (j = y1; j <= y2; j++) { |
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< |
Screen_blit(the_host_buffer + i, the_buffer + i, VideoMonitor.mode.x >> 3); |
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< |
i += bytes_per_row; |
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> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, mode.x / pixels_per_byte); |
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> |
i1 += src_bytes_per_row; |
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> |
i2 += dst_bytes_per_row; |
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} |
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} else { |
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// Update the_host_buffer and copy of the_buffer |
| 372 |
+ |
const int src_bytes_per_row = mode.bytes_per_row; |
| 373 |
+ |
const int dst_bytes_per_row = drv->img->bytes_per_line; |
| 374 |
+ |
const int bytes_per_pixel = src_bytes_per_row / mode.x; |
| 375 |
+ |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
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for (j = y1; j <= y2; j++) { |
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< |
Screen_blit(the_host_buffer + i, the_buffer + i, bytes_per_pixel * VideoMonitor.mode.x); |
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< |
i += bytes_per_row; |
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> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, bytes_per_pixel * mode.x); |
| 378 |
> |
i1 += src_bytes_per_row; |
| 379 |
> |
i2 += dst_bytes_per_row; |
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} |
| 381 |
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} |
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|
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< |
if (have_shm) |
| 384 |
< |
XShmPutImage(x_display, the_win, the_gc, img, 0, y1, 0, y1, VideoMonitor.mode.x, height, 0); |
| 383 |
> |
if (drv->have_shm) |
| 384 |
> |
XShmPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height, 0); |
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else |
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< |
XPutImage(x_display, the_win, the_gc, img, 0, y1, 0, y1, VideoMonitor.mode.x, height); |
| 386 |
> |
XPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height); |
| 387 |
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} |
| 388 |
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mainBuffer.dirty = false; |
| 389 |
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} |
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#if REAL_ADDRESSING || DIRECT_ADDRESSING |
| 398 |
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static inline void update_display_dga_vosf(void) |
| 399 |
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{ |
| 400 |
+ |
const video_mode &mode = drv->monitor.get_current_mode(); |
| 401 |
+ |
|
| 402 |
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int page = 0; |
| 403 |
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for (;;) { |
| 404 |
< |
const int first_page = find_next_page_set(page); |
| 404 |
> |
const unsigned first_page = find_next_page_set(page); |
| 405 |
|
if (first_page >= mainBuffer.pageCount) |
| 406 |
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break; |
| 407 |
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|
| 417 |
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const int y1 = mainBuffer.pageInfo[first_page].top; |
| 418 |
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const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
| 419 |
|
|
| 420 |
< |
const int bytes_per_row = VideoMonitor.mode.bytes_per_row; |
| 421 |
< |
const int bytes_per_pixel = VideoMonitor.mode.bytes_per_row / VideoMonitor.mode.x; |
| 420 |
> |
const int bytes_per_row = mode.bytes_per_row; |
| 421 |
> |
const int bytes_per_pixel = mode.bytes_per_row / mode.x; |
| 422 |
|
int i, j; |
| 423 |
|
|
| 424 |
|
// Check for first column from left and first column |
| 425 |
|
// from right that have changed |
| 426 |
< |
int x1 = VideoMonitor.mode.x * bytes_per_pixel - 1; |
| 426 |
> |
int x1 = mode.x * bytes_per_pixel - 1; |
| 427 |
|
for (j = y1; j <= y2; j++) { |
| 428 |
|
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 429 |
|
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 440 |
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for (j = y2; j >= y1; j--) { |
| 441 |
|
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
| 442 |
|
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
| 443 |
< |
for (i = VideoMonitor.mode.x * bytes_per_pixel - 1; i > x2; i--) { |
| 443 |
> |
for (i = mode.x * bytes_per_pixel - 1; i > x2; i--) { |
| 444 |
|
if (p1[i] != p2[i]) { |
| 445 |
|
x2 = i; |
| 446 |
|
break; |
