1fa5142093
code for reading from the frame buffer. Reading from the frame buffer is usually much slower than writing to the frame buffer. Typically 10 to 100 times slower. It old modes, it takes many more PIOs, and in newer modes with no PIOs writes are often write-combined while reads remain uncached. Reading from the frame buffer is not very common, so this change doesn't give speedups of 10 to 100 times. My main test case is a floodfill() function that reads about as many pixels as it writes. The speedups are typically a factor of 2 to 4. Duplicating writes to the shadow buffer is slower when no reads from the frame buffer are done, but reads are often done for the pixels under the mouse cursor, and doing these reads from the shadow buffer more than compensates for the overhead of writing the shadow buffer in at least the slower modes. Management of the mouse cursor also becomes simpler. The shadow buffer doesn't take any extra memory, except twice as much in old 4-plane modes. A buffer for holding a copy of the frame buffer was allocated up front for use in the screen switching signal handler. This wasn't changed when the handler was made async-signal safe. Use the same buffer the shadow (but make it twice as large in the 4-plane modes), and remove large special code for writing it as well as large special code for reading ut. It used to have a rawer format in the 4-plane modes. Now it has a bitmap format which takes twice as much memory but can be written almost as fast without special code. VIDBUFs that are not the whole frame buffer were never supported, and the change depends on this. Check for invalid VIDBUFs in some places and do nothing. The removed code did something not so good.
531 lines
14 KiB
C
531 lines
14 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1991-1997 Søren Schmidt
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <signal.h>
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#include <stdio.h>
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/ioctl.h>
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#include <sys/mman.h>
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#include <sys/fbio.h>
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#include <sys/kbio.h>
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#include <sys/consio.h>
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#include "vgl.h"
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/* XXX Direct Color 24bits modes unsupported */
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#define min(x, y) (((x) < (y)) ? (x) : (y))
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#define max(x, y) (((x) > (y)) ? (x) : (y))
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VGLBitmap *VGLDisplay;
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VGLBitmap VGLVDisplay;
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video_info_t VGLModeInfo;
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video_adapter_info_t VGLAdpInfo;
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byte *VGLBuf;
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static int VGLMode;
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static int VGLOldMode;
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static size_t VGLBufSize;
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static byte *VGLMem = MAP_FAILED;
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static int VGLSwitchPending;
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static int VGLAbortPending;
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static int VGLOnDisplay;
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static unsigned int VGLCurWindow;
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static int VGLInitDone = 0;
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static video_info_t VGLOldModeInfo;
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static vid_info_t VGLOldVInfo;
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|
|
void
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VGLEnd()
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{
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struct vt_mode smode;
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int size[3];
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|
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if (!VGLInitDone)
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return;
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VGLInitDone = 0;
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VGLSwitchPending = 0;
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VGLAbortPending = 0;
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signal(SIGUSR1, SIG_IGN);
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if (VGLMem != MAP_FAILED) {
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VGLClear(VGLDisplay, 0);
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munmap(VGLMem, VGLAdpInfo.va_window_size);
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}
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if (VGLOldMode >= M_VESA_BASE)
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ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
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else
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ioctl(0, _IO('S', VGLOldMode), 0);
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if (VGLOldModeInfo.vi_flags & V_INFO_GRAPHICS) {
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size[0] = VGLOldVInfo.mv_csz;
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size[1] = VGLOldVInfo.mv_rsz;
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size[2] = VGLOldVInfo.font_size;;
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ioctl(0, KDRASTER, size);
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}
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if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT)
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ioctl(0, KDDISABIO, 0);
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ioctl(0, KDSETMODE, KD_TEXT);
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smode.mode = VT_AUTO;
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ioctl(0, VT_SETMODE, &smode);
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if (VGLBuf)
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free(VGLBuf);
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VGLBuf = NULL;
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free(VGLDisplay);
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VGLDisplay = NULL;
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VGLKeyboardEnd();
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}
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|
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static void
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VGLAbort(int arg)
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{
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sigset_t mask;
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VGLAbortPending = 1;
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signal(SIGINT, SIG_IGN);
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signal(SIGTERM, SIG_IGN);
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signal(SIGUSR2, SIG_IGN);
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if (arg == SIGBUS || arg == SIGSEGV) {
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signal(arg, SIG_DFL);
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sigemptyset(&mask);
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sigaddset(&mask, arg);
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sigprocmask(SIG_UNBLOCK, &mask, NULL);
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VGLEnd();
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kill(getpid(), arg);
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}
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}
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static void
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VGLSwitch(int arg __unused)
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{
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if (!VGLOnDisplay)
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VGLOnDisplay = 1;
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else
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VGLOnDisplay = 0;
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VGLSwitchPending = 1;
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signal(SIGUSR1, VGLSwitch);
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}
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|
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int
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VGLInit(int mode)
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{
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struct vt_mode smode;
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int adptype, depth;
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|
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if (VGLInitDone)
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return -1;
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signal(SIGUSR1, VGLSwitch);
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signal(SIGINT, VGLAbort);
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signal(SIGTERM, VGLAbort);
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signal(SIGSEGV, VGLAbort);
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signal(SIGBUS, VGLAbort);
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signal(SIGUSR2, SIG_IGN);
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VGLOnDisplay = 1;
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VGLSwitchPending = 0;
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VGLAbortPending = 0;
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if (ioctl(0, CONS_GET, &VGLOldMode) || ioctl(0, CONS_CURRENT, &adptype))
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return -1;
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if (IOCGROUP(mode) == 'V') /* XXX: this is ugly */
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VGLModeInfo.vi_mode = (mode & 0x0ff) + M_VESA_BASE;
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else
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VGLModeInfo.vi_mode = mode & 0x0ff;
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if (ioctl(0, CONS_MODEINFO, &VGLModeInfo)) /* FBIO_MODEINFO */
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return -1;
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/* Save info for old mode to restore font size if old mode is graphics. */
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VGLOldModeInfo.vi_mode = VGLOldMode;
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if (ioctl(0, CONS_MODEINFO, &VGLOldModeInfo))
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return -1;
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VGLOldVInfo.size = sizeof(VGLOldVInfo);
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if (ioctl(0, CONS_GETINFO, &VGLOldVInfo))
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return -1;
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VGLDisplay = (VGLBitmap *)malloc(sizeof(VGLBitmap));
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if (VGLDisplay == NULL)
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return -2;
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if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT && ioctl(0, KDENABIO, 0)) {
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free(VGLDisplay);
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return -3;
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}
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VGLInitDone = 1;
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/*
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* vi_mem_model specifies the memory model of the current video mode
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* in -CURRENT.
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*/
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switch (VGLModeInfo.vi_mem_model) {
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case V_INFO_MM_PLANAR:
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/* we can handle EGA/VGA planner modes only */
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if (VGLModeInfo.vi_depth != 4 || VGLModeInfo.vi_planes != 4
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|| (adptype != KD_EGA && adptype != KD_VGA)) {
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VGLEnd();
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return -4;
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}
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VGLDisplay->Type = VIDBUF4;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_PACKED:
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|
/* we can do only 256 color packed modes */
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if (VGLModeInfo.vi_depth != 8) {
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VGLEnd();
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return -4;
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}
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VGLDisplay->Type = VIDBUF8;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_VGAX:
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VGLDisplay->Type = VIDBUF8X;
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VGLDisplay->PixelBytes = 1;
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break;
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case V_INFO_MM_DIRECT:
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VGLDisplay->PixelBytes = VGLModeInfo.vi_pixel_size;
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switch (VGLDisplay->PixelBytes) {
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case 2:
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VGLDisplay->Type = VIDBUF16;
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break;
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#if notyet
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case 3:
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VGLDisplay->Type = VIDBUF24;
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break;
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#endif
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case 4:
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VGLDisplay->Type = VIDBUF32;
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break;
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default:
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VGLEnd();
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return -4;
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}
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break;
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default:
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|
VGLEnd();
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|
return -4;
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}
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|
|
ioctl(0, VT_WAITACTIVE, 0);
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|
ioctl(0, KDSETMODE, KD_GRAPHICS);
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|
if (ioctl(0, mode, 0)) {
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VGLEnd();
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return -5;
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}
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if (ioctl(0, CONS_ADPINFO, &VGLAdpInfo)) { /* FBIO_ADPINFO */
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VGLEnd();
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return -6;
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}
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|
|
/*
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* Calculate the shadow screen buffer size. In -CURRENT, va_buffer_size
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|
* always holds the entire frame buffer size, wheather it's in the linear
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* mode or windowed mode.
|
|
* VGLBufSize = VGLAdpInfo.va_buffer_size;
|
|
* In -STABLE, va_buffer_size holds the frame buffer size, only if
|
|
* the linear frame buffer mode is supported. Otherwise the field is zero.
|
|
* We shall calculate the minimal size in this case:
|
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* VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*VGLModeInfo.vi_planes
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* or
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* VGLAdpInfo.va_window_size*VGLModeInfo.vi_planes;
|
|
* Use whichever is larger.
|
|
*/
|
|
if (VGLAdpInfo.va_buffer_size != 0)
|
|
VGLBufSize = VGLAdpInfo.va_buffer_size;
|
|
else
|
|
VGLBufSize = max(VGLAdpInfo.va_line_width*VGLModeInfo.vi_height,
|
|
VGLAdpInfo.va_window_size)*VGLModeInfo.vi_planes;
|
|
/*
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|
* The above is for old -CURRENT. Current -CURRENT since r203535 and/or
|
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* r248799 restricts va_buffer_size to the displayed size in VESA modes to
|
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* avoid wasting kva for mapping unused parts of the frame buffer. But all
|
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* parts were usable here. Applying the same restriction to user mappings
|
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* makes our virtualization useless and breaks our panning, but large frame
|
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* buffers are also difficult for us to manage (clearing and switching may
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* be too slow, and malloc() may fail). Restrict ourselves similarly to
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* get the same efficiency and bugs for all kernels.
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*/
|
|
if (VGLModeInfo.vi_mode >= M_VESA_BASE)
|
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VGLBufSize = VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*
|
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VGLModeInfo.vi_planes;
|
|
VGLBuf = malloc(VGLBufSize);
|
|
if (VGLBuf == NULL) {
|
|
VGLEnd();
|
|
return -7;
|
|
}
|
|
|
|
#ifdef LIBVGL_DEBUG
|
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fprintf(stderr, "VGLBufSize:0x%x\n", VGLBufSize);
|
|
#endif
|
|
|
|
/* see if we are in the windowed buffer mode or in the linear buffer mode */
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size) {
|
|
switch (VGLDisplay->Type) {
|
|
case VIDBUF4:
|
|
VGLDisplay->Type = VIDBUF4S;
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break;
|
|
case VIDBUF8:
|
|
VGLDisplay->Type = VIDBUF8S;
|
|
break;
|
|
case VIDBUF16:
|
|
VGLDisplay->Type = VIDBUF16S;
|
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break;
|
|
case VIDBUF24:
|
|
VGLDisplay->Type = VIDBUF24S;
|
|
break;
|
|
case VIDBUF32:
|
|
VGLDisplay->Type = VIDBUF32S;
|
|
break;
|
|
default:
|
|
VGLEnd();
|
|
return -8;
|
|
}
|
|
}
|
|
|
|
VGLMode = mode;
|
|
VGLCurWindow = 0;
|
|
|
|
VGLDisplay->Xsize = VGLModeInfo.vi_width;
|
|
VGLDisplay->Ysize = VGLModeInfo.vi_height;
|
|
depth = VGLModeInfo.vi_depth;
|
|
if (depth == 15)
|
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depth = 16;
|
|
VGLDisplay->VXsize = VGLAdpInfo.va_line_width
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*8/(depth/VGLModeInfo.vi_planes);
|
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VGLDisplay->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
|
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VGLDisplay->Xorigin = 0;
|
|
VGLDisplay->Yorigin = 0;
|
|
|
|
VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
|
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MAP_FILE | MAP_SHARED, 0, 0);
|
|
if (VGLMem == MAP_FAILED) {
|
|
VGLEnd();
|
|
return -7;
|
|
}
|
|
VGLDisplay->Bitmap = VGLMem;
|
|
|
|
VGLVDisplay = *VGLDisplay;
|
|
VGLVDisplay.Type = MEMBUF;
|
|
if (VGLModeInfo.vi_depth < 8)
|
|
VGLVDisplay.Bitmap = malloc(2 * VGLBufSize);
|
|
else
|
|
VGLVDisplay.Bitmap = VGLBuf;
|
|
|
|
VGLSavePalette();
|
|
|
|
#ifdef LIBVGL_DEBUG
|
|
fprintf(stderr, "va_line_width:%d\n", VGLAdpInfo.va_line_width);
|
|
fprintf(stderr, "VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
|
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VGLDisplay->Xsize, VGLDisplay->Ysize,
|
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VGLDisplay->VXsize, VGLDisplay->VYsize);
|
|
#endif
|
|
|
|
smode.mode = VT_PROCESS;
|
|
smode.waitv = 0;
|
|
smode.relsig = SIGUSR1;
|
|
smode.acqsig = SIGUSR1;
|
|
smode.frsig = SIGINT;
|
|
if (ioctl(0, VT_SETMODE, &smode)) {
|
|
VGLEnd();
|
|
return -9;
|
|
}
|
|
VGLTextSetFontFile((byte*)0);
|
|
VGLClear(VGLDisplay, 0);
|
|
return 0;
|
|
}
|
|
|
|
void
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|
VGLCheckSwitch()
|
|
{
|
|
if (VGLAbortPending) {
|
|
VGLEnd();
|
|
exit(0);
|
|
}
|
|
while (VGLSwitchPending) {
|
|
VGLSwitchPending = 0;
|
|
if (VGLOnDisplay) {
|
|
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT)
|
|
ioctl(0, KDENABIO, 0);
|
|
ioctl(0, KDSETMODE, KD_GRAPHICS);
|
|
ioctl(0, VGLMode, 0);
|
|
VGLCurWindow = 0;
|
|
VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
|
|
MAP_FILE | MAP_SHARED, 0, 0);
|
|
|
|
/* XXX: what if mmap() has failed! */
|
|
VGLDisplay->Type = VIDBUF8; /* XXX */
|
|
switch (VGLModeInfo.vi_mem_model) {
|
|
case V_INFO_MM_PLANAR:
|
|
if (VGLModeInfo.vi_depth == 4 && VGLModeInfo.vi_planes == 4) {
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
|
|
VGLDisplay->Type = VIDBUF4S;
|
|
else
|
|
VGLDisplay->Type = VIDBUF4;
|
|
} else {
|
|
/* shouldn't be happening */
|
|
}
|
|
break;
|
|
case V_INFO_MM_PACKED:
|
|
if (VGLModeInfo.vi_depth == 8) {
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
|
|
VGLDisplay->Type = VIDBUF8S;
|
|
else
|
|
VGLDisplay->Type = VIDBUF8;
|
|
}
|
|
break;
|
|
case V_INFO_MM_VGAX:
|
|
VGLDisplay->Type = VIDBUF8X;
|
|
break;
|
|
case V_INFO_MM_DIRECT:
|
|
switch (VGLModeInfo.vi_pixel_size) {
|
|
case 2:
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
|
|
VGLDisplay->Type = VIDBUF16S;
|
|
else
|
|
VGLDisplay->Type = VIDBUF16;
|
|
break;
|
|
case 3:
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
|
|
VGLDisplay->Type = VIDBUF24S;
|
|
else
|
|
VGLDisplay->Type = VIDBUF24;
|
|
break;
|
|
case 4:
|
|
if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
|
|
VGLDisplay->Type = VIDBUF32S;
|
|
else
|
|
VGLDisplay->Type = VIDBUF32;
|
|
break;
|
|
default:
|
|
/* shouldn't be happening */
|
|
break;
|
|
}
|
|
default:
|
|
/* shouldn't be happening */
|
|
break;
|
|
}
|
|
|
|
VGLDisplay->Bitmap = VGLMem;
|
|
VGLDisplay->Xsize = VGLModeInfo.vi_width;
|
|
VGLDisplay->Ysize = VGLModeInfo.vi_height;
|
|
VGLSetVScreenSize(VGLDisplay, VGLDisplay->VXsize, VGLDisplay->VYsize);
|
|
VGLRestoreBlank();
|
|
VGLRestoreBorder();
|
|
VGLMouseRestore();
|
|
VGLPanScreen(VGLDisplay, VGLDisplay->Xorigin, VGLDisplay->Yorigin);
|
|
VGLBitmapCopy(&VGLVDisplay, 0, 0, VGLDisplay, 0, 0,
|
|
VGLDisplay->VXsize, VGLDisplay->VYsize);
|
|
VGLRestorePalette();
|
|
ioctl(0, VT_RELDISP, VT_ACKACQ);
|
|
}
|
|
else {
|
|
VGLMem = MAP_FAILED;
|
|
munmap(VGLDisplay->Bitmap, VGLAdpInfo.va_window_size);
|
|
ioctl(0, VGLOldMode, 0);
|
|
ioctl(0, KDSETMODE, KD_TEXT);
|
|
if (VGLModeInfo.vi_mem_model != V_INFO_MM_DIRECT)
|
|
ioctl(0, KDDISABIO, 0);
|
|
ioctl(0, VT_RELDISP, VT_TRUE);
|
|
VGLDisplay->Bitmap = VGLBuf;
|
|
VGLDisplay->Type = MEMBUF;
|
|
VGLDisplay->Xsize = VGLDisplay->VXsize;
|
|
VGLDisplay->Ysize = VGLDisplay->VYsize;
|
|
while (!VGLOnDisplay) pause();
|
|
}
|
|
}
|
|
}
|
|
|
|
int
|
|
VGLSetSegment(unsigned int offset)
|
|
{
|
|
if (offset/VGLAdpInfo.va_window_size != VGLCurWindow) {
|
|
ioctl(0, CONS_SETWINORG, offset); /* FBIO_SETWINORG */
|
|
VGLCurWindow = offset/VGLAdpInfo.va_window_size;
|
|
}
|
|
return (offset%VGLAdpInfo.va_window_size);
|
|
}
|
|
|
|
int
|
|
VGLSetVScreenSize(VGLBitmap *object, int VXsize, int VYsize)
|
|
{
|
|
int depth;
|
|
|
|
if (VXsize < object->Xsize || VYsize < object->Ysize)
|
|
return -1;
|
|
if (object->Type == MEMBUF)
|
|
return -1;
|
|
if (ioctl(0, FBIO_SETLINEWIDTH, &VXsize))
|
|
return -1;
|
|
ioctl(0, CONS_ADPINFO, &VGLAdpInfo); /* FBIO_ADPINFO */
|
|
depth = VGLModeInfo.vi_depth;
|
|
if (depth == 15)
|
|
depth = 16;
|
|
object->VXsize = VGLAdpInfo.va_line_width
|
|
*8/(depth/VGLModeInfo.vi_planes);
|
|
object->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
|
|
if (VYsize < object->VYsize)
|
|
object->VYsize = VYsize;
|
|
|
|
#ifdef LIBVGL_DEBUG
|
|
fprintf(stderr, "new size: VGLXsize:%d, Ysize:%d, VXsize:%d, VYsize:%d\n",
|
|
object->Xsize, object->Ysize, object->VXsize, object->VYsize);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
VGLPanScreen(VGLBitmap *object, int x, int y)
|
|
{
|
|
video_display_start_t origin;
|
|
|
|
if (x < 0 || x + object->Xsize > object->VXsize
|
|
|| y < 0 || y + object->Ysize > object->VYsize)
|
|
return -1;
|
|
if (object->Type == MEMBUF)
|
|
return 0;
|
|
origin.x = x;
|
|
origin.y = y;
|
|
if (ioctl(0, FBIO_SETDISPSTART, &origin))
|
|
return -1;
|
|
object->Xorigin = x;
|
|
object->Yorigin = y;
|
|
|
|
#ifdef LIBVGL_DEBUG
|
|
fprintf(stderr, "new origin: (%d, %d)\n", x, y);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|