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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) 1997-2002 Christian Bauer |
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* Basilisk II (C) 1997-2005 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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#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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// Note: this file must be #include'd only in video_x.cpp |
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#ifdef ENABLE_VOSF |
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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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#ifdef _WIN32 |
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#include "util_windows.h" |
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#endif |
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|
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// Glue for SDL and X11 support |
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#ifdef USE_SDL_VIDEO |
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#define MONITOR_INIT SDL_monitor_desc &monitor |
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#define VIDEO_DRV_WIN_INIT driver_window *drv |
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#define VIDEO_DRV_DGA_INIT driver_fullscreen *drv |
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#define VIDEO_DRV_LOCK_PIXELS if (SDL_MUSTLOCK(drv->s)) SDL_LockSurface(drv->s) |
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#define VIDEO_DRV_UNLOCK_PIXELS if (SDL_MUSTLOCK(drv->s)) SDL_UnlockSurface(drv->s) |
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#define VIDEO_DRV_DEPTH drv->s->format->BitsPerPixel |
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#define VIDEO_DRV_WIDTH drv->s->w |
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#define VIDEO_DRV_HEIGHT drv->s->h |
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#define VIDEO_DRV_ROW_BYTES drv->s->pitch |
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#else |
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#ifdef SHEEPSHAVER |
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#define MONITOR_INIT /* nothing */ |
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#define VIDEO_DRV_WIN_INIT /* nothing */ |
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#define VIDEO_DRV_DGA_INIT /* nothing */ |
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#define VIDEO_DRV_WINDOW the_win |
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#define VIDEO_DRV_GC the_gc |
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#define VIDEO_DRV_IMAGE img |
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#define VIDEO_DRV_HAVE_SHM have_shm |
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#else |
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#define MONITOR_INIT X11_monitor_desc &monitor |
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#define VIDEO_DRV_WIN_INIT driver_window *drv |
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#define VIDEO_DRV_DGA_INIT driver_dga *drv |
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#define VIDEO_DRV_WINDOW drv->w |
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#define VIDEO_DRV_GC drv->gc |
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#define VIDEO_DRV_IMAGE drv->img |
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#define VIDEO_DRV_HAVE_SHM drv->have_shm |
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#endif |
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#define VIDEO_DRV_LOCK_PIXELS /* nothing */ |
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#define VIDEO_DRV_UNLOCK_PIXELS /* nothing */ |
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#define VIDEO_DRV_DEPTH VIDEO_DRV_IMAGE->depth |
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#define VIDEO_DRV_WIDTH VIDEO_DRV_IMAGE->width |
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#define VIDEO_DRV_HEIGHT VIDEO_DRV_IMAGE->height |
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#define VIDEO_DRV_ROW_BYTES VIDEO_DRV_IMAGE->bytes_per_line |
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#endif |
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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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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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bool very_dirty; // Flag: set if the frame buffer was completely modified (e.g. colormap changes) |
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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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#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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mainBuffer.very_dirty = false; \ |
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} while (0) |
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|
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#define PFLAG_SET_VERY_DIRTY do { \ |
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mainBuffer.very_dirty = true; \ |
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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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#endif |
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} |
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#ifdef HAVE_PTHREADS |
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#ifdef HAVE_SPINLOCKS |
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static spinlock_t vosf_lock = SPIN_LOCK_UNLOCKED; // Mutex to protect frame buffer (dirtyPages in fact) |
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#define LOCK_VOSF spin_lock(&vosf_lock) |
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#define UNLOCK_VOSF spin_unlock(&vosf_lock) |
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#elif defined(_WIN32) |
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static mutex_t vosf_lock; // Mutex to protect frame buffer (dirtyPages in fact) |
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#define LOCK_VOSF vosf_lock.lock(); |
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#define UNLOCK_VOSF vosf_lock.unlock(); |
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#elif defined(HAVE_PTHREADS) |
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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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// Extend size to page boundary |
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static uint32 page_extend(uint32 size) |
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{ |
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const uint32 page_size = getpagesize(); |
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const uint32 page_size = vm_get_page_size(); |
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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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* Initialize the VOSF system (mainBuffer structure, SIGSEGV handler) |
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* Check if VOSF acceleration is profitable on this platform |
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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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const int VOSF_PROFITABLE_TRIES = 3; // Make 3 attempts for full screen update |
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const int VOSF_PROFITABLE_THRESHOLD = 16667; // 60 Hz |
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static bool video_vosf_init(X11_monitor_desc &monitor) |
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static bool video_vosf_profitable(void) |
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{ |
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const video_mode &mode = monitor.get_current_mode(); |
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int64 durations[VOSF_PROFITABLE_TRIES]; |
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int mean_duration = 0; |
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|
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for (int i = 0; i < VOSF_PROFITABLE_TRIES; i++) { |
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uint64 start = GetTicks_usec(); |
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for (int p = 0; p < mainBuffer.pageCount; p++) { |
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uint8 *addr = (uint8 *)(mainBuffer.memStart + (p * mainBuffer.pageSize)); |
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addr[0] = 0; // Trigger Screen_fault_handler() |
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} |
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int64 duration = GetTicks_usec() - start; |
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mean_duration += duration; |
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durations[i] = duration; |
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|
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PFLAG_CLEAR_ALL; |
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mainBuffer.dirty = false; |
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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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|
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mean_duration /= VOSF_PROFITABLE_TRIES; |
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D(bug("Triggered %d screen faults in %ld usec on average\n", mainBuffer.pageCount, mean_duration)); |
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return (mean_duration < (VOSF_PROFITABLE_THRESHOLD * (frame_skip ? frame_skip : 1))); |
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} |
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|
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const uintptr page_size = getpagesize(); |
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/* |
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* Initialize the VOSF system (mainBuffer structure, SIGSEGV handler) |
244 |
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*/ |
245 |
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|
246 |
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static bool video_vosf_init(MONITOR_INIT) |
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{ |
248 |
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VIDEO_MODE_INIT_MONITOR; |
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|
250 |
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const uintptr page_size = vm_get_page_size(); |
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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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|
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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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unsigned y1 = a / VIDEO_MODE_ROW_BYTES; |
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if (y1 >= VIDEO_MODE_Y) |
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y1 = VIDEO_MODE_Y - 1; |
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|
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unsigned y2 = (a + mainBuffer.pageSize) / VIDEO_MODE_ROW_BYTES; |
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if (y2 >= VIDEO_MODE_Y) |
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y2 = VIDEO_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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if (vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ) != 0) |
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return false; |
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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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|
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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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* Screen fault handler |
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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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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=%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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* Update display for Windowed mode and VOSF |
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*/ |
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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, 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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The state of the framebuffer pages that have been touched are maintained |
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than pageCount. |
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*/ |
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static inline void update_display_window_vosf(driver_window *drv) |
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> |
static void update_display_window_vosf(VIDEO_DRV_WIN_INIT) |
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{ |
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const video_mode &mode = drv->monitor.get_current_mode(); |
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VIDEO_MODE_INIT; |
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int page = 0; |
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for (;;) { |
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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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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++) { |
417 |
< |
Screen_blit(the_host_buffer + i2, the_buffer + i1, mode.x / pixels_per_byte); |
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< |
i1 += src_bytes_per_row; |
419 |
< |
i2 += dst_bytes_per_row; |
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} |
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|
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} else { |
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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 bytes_per_pixel = src_bytes_per_row / mode.x; |
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< |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
357 |
< |
for (j = y1; j <= y2; j++) { |
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 |
< |
} |
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// Update the_host_buffer |
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> |
VIDEO_DRV_LOCK_PIXELS; |
413 |
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const int src_bytes_per_row = VIDEO_MODE_ROW_BYTES; |
414 |
> |
const int dst_bytes_per_row = VIDEO_DRV_ROW_BYTES; |
415 |
> |
int i1 = y1 * src_bytes_per_row, i2 = y1 * dst_bytes_per_row, j; |
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> |
for (j = y1; j <= y2; j++) { |
417 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, src_bytes_per_row); |
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> |
i1 += src_bytes_per_row; |
419 |
> |
i2 += dst_bytes_per_row; |
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} |
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+ |
VIDEO_DRV_UNLOCK_PIXELS; |
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< |
if (drv->have_shm) |
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< |
XShmPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height, 0); |
423 |
> |
#ifdef USE_SDL_VIDEO |
424 |
> |
SDL_UpdateRect(drv->s, 0, y1, VIDEO_MODE_X, height); |
425 |
> |
#else |
426 |
> |
if (VIDEO_DRV_HAVE_SHM) |
427 |
> |
XShmPutImage(x_display, VIDEO_DRV_WINDOW, VIDEO_DRV_GC, VIDEO_DRV_IMAGE, 0, y1, 0, y1, VIDEO_MODE_X, height, 0); |
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else |
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< |
XPutImage(x_display, drv->w, drv->gc, drv->img, 0, y1, 0, y1, mode.x, height); |
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> |
XPutImage(x_display, VIDEO_DRV_WINDOW, VIDEO_DRV_GC, VIDEO_DRV_IMAGE, 0, y1, 0, y1, VIDEO_MODE_X, height); |
430 |
> |
#endif |
431 |
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} |
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mainBuffer.dirty = false; |
433 |
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} |
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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) |
442 |
> |
static void update_display_dga_vosf(VIDEO_DRV_DGA_INIT) |
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{ |
444 |
< |
const video_mode &mode = drv->monitor.get_current_mode(); |
444 |
> |
VIDEO_MODE_INIT; |
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|
446 |
< |
int page = 0; |
446 |
> |
// Compute number of bytes per row, take care to virtual screens |
447 |
> |
const int src_bytes_per_row = VIDEO_MODE_ROW_BYTES; |
448 |
> |
const int dst_bytes_per_row = TrivialBytesPerRow(VIDEO_MODE_X, DepthModeForPixelDepth(VIDEO_DRV_DEPTH)); |
449 |
> |
const int scr_bytes_per_row = VIDEO_DRV_ROW_BYTES; |
450 |
> |
assert(dst_bytes_per_row <= scr_bytes_per_row); |
451 |
> |
const int scr_bytes_left = scr_bytes_per_row - dst_bytes_per_row; |
452 |
> |
|
453 |
> |
// Full screen update requested? |
454 |
> |
if (mainBuffer.very_dirty) { |
455 |
> |
PFLAG_CLEAR_ALL; |
456 |
> |
vm_protect((char *)mainBuffer.memStart, mainBuffer.memLength, VM_PAGE_READ); |
457 |
> |
memcpy(the_buffer_copy, the_buffer, VIDEO_MODE_ROW_BYTES * VIDEO_MODE_Y); |
458 |
> |
VIDEO_DRV_LOCK_PIXELS; |
459 |
> |
int i1 = 0, i2 = 0; |
460 |
> |
for (int j = 0; j < VIDEO_MODE_Y; j++) { |
461 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, src_bytes_per_row); |
462 |
> |
i1 += src_bytes_per_row; |
463 |
> |
i2 += scr_bytes_per_row; |
464 |
> |
} |
465 |
> |
#ifdef USE_SDL_VIDEO |
466 |
> |
SDL_UpdateRect(drv->s, 0, 0, VIDEO_MODE_X, VIDEO_MODE_Y); |
467 |
> |
#endif |
468 |
> |
VIDEO_DRV_UNLOCK_PIXELS; |
469 |
> |
return; |
470 |
> |
} |
471 |
> |
|
472 |
> |
// Setup partial blitter (use 64-pixel wide chunks) |
473 |
> |
const int n_pixels = 64; |
474 |
> |
const int n_chunks = VIDEO_MODE_X / n_pixels; |
475 |
> |
const int n_pixels_left = VIDEO_MODE_X - (n_chunks * n_pixels); |
476 |
> |
const int src_chunk_size = src_bytes_per_row / n_chunks; |
477 |
> |
const int dst_chunk_size = dst_bytes_per_row / n_chunks; |
478 |
> |
const int src_chunk_size_left = src_bytes_per_row - (n_chunks * src_chunk_size); |
479 |
> |
const int dst_chunk_size_left = dst_bytes_per_row - (n_chunks * dst_chunk_size); |
480 |
> |
|
481 |
> |
int page = 0, last_scanline = -1; |
482 |
|
for (;;) { |
483 |
|
const unsigned first_page = find_next_page_set(page); |
484 |
|
if (first_page >= mainBuffer.pageCount) |
491 |
|
const int32 offset = first_page << mainBuffer.pageBits; |
492 |
|
const uint32 length = (page - first_page) << mainBuffer.pageBits; |
493 |
|
vm_protect((char *)mainBuffer.memStart + offset, length, VM_PAGE_READ); |
494 |
< |
|
495 |
< |
// I am sure that y2 >= y1 and depth != 1 |
496 |
< |
const int y1 = mainBuffer.pageInfo[first_page].top; |
497 |
< |
const int y2 = mainBuffer.pageInfo[page - 1].bottom; |
498 |
< |
|
499 |
< |
const int bytes_per_row = mode.bytes_per_row; |
500 |
< |
const int bytes_per_pixel = mode.bytes_per_row / mode.x; |
501 |
< |
int i, j; |
502 |
< |
|
503 |
< |
// Check for first column from left and first column |
504 |
< |
// from right that have changed |
505 |
< |
int x1 = mode.x * bytes_per_pixel - 1; |
506 |
< |
for (j = y1; j <= y2; j++) { |
507 |
< |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
508 |
< |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
509 |
< |
for (i = 0; i < x1; i++) { |
510 |
< |
if (p1[i] != p2[i]) { |
511 |
< |
x1 = i; |
512 |
< |
break; |
494 |
> |
|
495 |
> |
// Optimized for scanlines, don't process overlapping lines again |
496 |
> |
int y1 = mainBuffer.pageInfo[first_page].top; |
497 |
> |
int y2 = mainBuffer.pageInfo[page - 1].bottom; |
498 |
> |
if (y1 <= last_scanline && ++y1 >= VIDEO_MODE_Y) |
499 |
> |
continue; |
500 |
> |
if (y2 <= last_scanline && ++y2 >= VIDEO_MODE_Y) |
501 |
> |
continue; |
502 |
> |
last_scanline = y2; |
503 |
> |
|
504 |
> |
// Update the_host_buffer and copy of the_buffer, one line at a time |
505 |
> |
int i1 = y1 * src_bytes_per_row; |
506 |
> |
int i2 = y1 * scr_bytes_per_row; |
507 |
> |
#ifdef USE_SDL_VIDEO |
508 |
> |
int bbi = 0; |
509 |
> |
SDL_Rect bb[3] = { |
510 |
> |
{ VIDEO_MODE_X, y1, 0, 0 }, |
511 |
> |
{ VIDEO_MODE_X, -1, 0, 0 }, |
512 |
> |
{ VIDEO_MODE_X, -1, 0, 0 } |
513 |
> |
}; |
514 |
> |
#endif |
515 |
> |
VIDEO_DRV_LOCK_PIXELS; |
516 |
> |
for (int j = y1; j <= y2; j++) { |
517 |
> |
for (int i = 0; i < n_chunks; i++) { |
518 |
> |
if (memcmp(the_buffer_copy + i1, the_buffer + i1, src_chunk_size) != 0) { |
519 |
> |
memcpy(the_buffer_copy + i1, the_buffer + i1, src_chunk_size); |
520 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, src_chunk_size); |
521 |
> |
#ifdef USE_SDL_VIDEO |
522 |
> |
const int x = i * n_pixels; |
523 |
> |
if (x < bb[bbi].x) { |
524 |
> |
if (bb[bbi].w) |
525 |
> |
bb[bbi].w += bb[bbi].x - x; |
526 |
> |
else |
527 |
> |
bb[bbi].w = n_pixels; |
528 |
> |
bb[bbi].x = x; |
529 |
> |
} |
530 |
> |
else if (x >= bb[bbi].x + bb[bbi].w) |
531 |
> |
bb[bbi].w = x + n_pixels - bb[bbi].x; |
532 |
> |
#endif |
533 |
|
} |
534 |
+ |
i1 += src_chunk_size; |
535 |
+ |
i2 += dst_chunk_size; |
536 |
|
} |
537 |
< |
} |
538 |
< |
x1 /= bytes_per_pixel; |
539 |
< |
|
540 |
< |
int x2 = x1 * bytes_per_pixel; |
541 |
< |
for (j = y2; j >= y1; j--) { |
542 |
< |
uint8 * const p1 = &the_buffer[j * bytes_per_row]; |
543 |
< |
uint8 * const p2 = &the_buffer_copy[j * bytes_per_row]; |
544 |
< |
for (i = mode.x * bytes_per_pixel - 1; i > x2; i--) { |
545 |
< |
if (p1[i] != p2[i]) { |
546 |
< |
x2 = i; |
547 |
< |
break; |
537 |
> |
if (src_chunk_size_left && dst_chunk_size_left) { |
538 |
> |
if (memcmp(the_buffer_copy + i1, the_buffer + i1, src_chunk_size_left) != 0) { |
539 |
> |
memcpy(the_buffer_copy + i1, the_buffer + i1, src_chunk_size_left); |
540 |
> |
Screen_blit(the_host_buffer + i2, the_buffer + i1, src_chunk_size_left); |
541 |
> |
} |
542 |
> |
i1 += src_chunk_size_left; |
543 |
> |
i2 += dst_chunk_size_left; |
544 |
> |
#ifdef USE_SDL_VIDEO |
545 |
> |
const int x = n_chunks * n_pixels; |
546 |
> |
if (x < bb[bbi].x) { |
547 |
> |
if (bb[bbi].w) |
548 |
> |
bb[bbi].w += bb[bbi].x - x; |
549 |
> |
else |
550 |
> |
bb[bbi].w = n_pixels_left; |
551 |
> |
bb[bbi].x = x; |
552 |
|
} |
553 |
+ |
else if (x >= bb[bbi].x + bb[bbi].w) |
554 |
+ |
bb[bbi].w = x + n_pixels_left - bb[bbi].x; |
555 |
+ |
#endif |
556 |
|
} |
557 |
+ |
i2 += scr_bytes_left; |
558 |
+ |
#ifdef USE_SDL_VIDEO |
559 |
+ |
bb[bbi].h++; |
560 |
+ |
if (bb[bbi].w && (j == y1 || j == y2 - 1 || j == y2)) { |
561 |
+ |
bbi++; |
562 |
+ |
assert(bbi <= 3); |
563 |
+ |
if (j != y2) |
564 |
+ |
bb[bbi].y = j + 1; |
565 |
+ |
} |
566 |
+ |
#endif |
567 |
|
} |
568 |
< |
x2 /= bytes_per_pixel; |
569 |
< |
|
570 |
< |
// Update the_host_buffer and copy of the_buffer |
571 |
< |
// There should be at least one pixel to copy |
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 |
< |
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 |
< |
} |
568 |
> |
#ifdef USE_SDL_VIDEO |
569 |
> |
SDL_UpdateRects(drv->s, bbi, bb); |
570 |
> |
#endif |
571 |
> |
VIDEO_DRV_UNLOCK_PIXELS; |
572 |
|
} |
573 |
|
mainBuffer.dirty = false; |
574 |
|
} |