fbc6daa1dc
Support for 16-bit and 32-bit Truecolor modes was supposed to be complete in r70991 of main.c and in nearby revisions for other files, but it was broken by the overruns in most cases (all cases were the mouse is enabled, and most cases where bitmaps are used). r70991 also uninintentionally added support for depths 9-15, 17-23 and 25-31. Depth 24 was more obviously broken and its support is ifdefed out. In the other ranges, only depth 15 is common. It was broken by buffer overruns in all cases. bitmap.c: - the static buffer was used even when it was too small (but it was large enough to often work accidentally in depth 16) - the size of the dynamically allocated buffer was too small - the sizing info bitmap->PixelBytes was not inititialzed in the bitmap constructor. It often ended up as 0 for MEMBUFs, so using it in more places gave more null pointer accesses. (It is per-bitmap, but since conversion between bitmaps of different depths is not supported (except from 4 bits by padding to 8), it would work better if it were global.) main.c: - depths were rounded down instead of up to a multiple of 8, so PixelBytes was 1 too small for depths above 8 except 16, 24 and 32. - PixelBytes was not initialized for 4-bit planar modes. It isn't really used for frame buffer accesses in these modes, but needs to be 1 in MEMBUF images. mouse.c: - the mouse cursor buffers were too small. vgl.h: - PixelBytes was not initialized in the static bitmap constructor. It should be initialized to the value for the current mode, but that is impossible in a static constructor. Initialize it to -1 so as to fail if it is used without further initialization. All modes that are supposed to be supported now don't crash in nontrivial tests, and almost work. Missing uses of PixelBytes now give in-bounds wrong pointers instead of overruns. Misconversions of bitmaps give multiple miscolored mouse cursors instead of 1 white one, and similarly for bitmaps copied through a MEMBUF.
586 lines
15 KiB
C
586 lines
15 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 <stdio.h>
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#include <sys/types.h>
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#include <sys/signal.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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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 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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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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/* ugly, but necessary */
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ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
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if (VGLOldMode == M_VESA_800x600) {
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int size[3];
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size[0] = VGLOldVInfo.mv_csz;
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size[1] = VGLOldVInfo.mv_rsz;
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size[2] = 16;
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ioctl(0, KDRASTER, size);
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}
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} else {
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ioctl(0, _IO('S', VGLOldMode), 0);
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}
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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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static void
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VGLAbort(int arg __unused)
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{
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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(SIGSEGV, SIG_IGN);
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signal(SIGBUS, SIG_IGN);
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signal(SIGUSR2, SIG_IGN);
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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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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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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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/* If current mode is VESA_800x600 then save its geometry to restore later */
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if ((VGLOldMode >= M_VESA_BASE) && (VGLOldMode == M_VESA_800x600)) {
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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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}
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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 (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.
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* VGLBufSize = VGLAdpInfo.va_buffer_size;
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* In -STABLE, va_buffer_size holds the frame buffer size, only if
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* the linear frame buffer mode is supported. Otherwise the field is zero.
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* 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;
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* Use whichever is larger.
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*/
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if (VGLAdpInfo.va_buffer_size != 0)
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VGLBufSize = VGLAdpInfo.va_buffer_size;
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else
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VGLBufSize = max(VGLAdpInfo.va_line_width*VGLModeInfo.vi_height,
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VGLAdpInfo.va_window_size)*VGLModeInfo.vi_planes;
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VGLBuf = malloc(VGLBufSize);
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if (VGLBuf == NULL) {
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VGLEnd();
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return -7;
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}
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#ifdef LIBVGL_DEBUG
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fprintf(stderr, "VGLBufSize:0x%x\n", VGLBufSize);
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#endif
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/* see if we are in the windowed buffer mode or in the linear buffer mode */
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size) {
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switch (VGLDisplay->Type) {
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case VIDBUF4:
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VGLDisplay->Type = VIDBUF4S;
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break;
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case VIDBUF8:
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VGLDisplay->Type = VIDBUF8S;
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break;
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case VIDBUF16:
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VGLDisplay->Type = VIDBUF16S;
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break;
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case VIDBUF24:
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VGLDisplay->Type = VIDBUF24S;
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break;
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case VIDBUF32:
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VGLDisplay->Type = VIDBUF32S;
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break;
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default:
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VGLEnd();
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return -8;
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}
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}
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VGLMode = mode;
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VGLCurWindow = 0;
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VGLDisplay->Xsize = VGLModeInfo.vi_width;
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VGLDisplay->Ysize = VGLModeInfo.vi_height;
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depth = VGLModeInfo.vi_depth;
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if (depth == 15)
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depth = 16;
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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;
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VGLDisplay->Yorigin = 0;
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VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
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MAP_FILE | MAP_SHARED, 0, 0);
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if (VGLMem == MAP_FAILED) {
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VGLEnd();
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return -7;
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}
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VGLDisplay->Bitmap = VGLMem;
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VGLSavePalette();
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#ifdef LIBVGL_DEBUG
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fprintf(stderr, "va_line_width:%d\n", VGLAdpInfo.va_line_width);
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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);
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#endif
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smode.mode = VT_PROCESS;
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smode.waitv = 0;
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smode.relsig = SIGUSR1;
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smode.acqsig = SIGUSR1;
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smode.frsig = SIGINT;
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if (ioctl(0, VT_SETMODE, &smode)) {
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VGLEnd();
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return -9;
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}
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VGLTextSetFontFile((byte*)0);
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VGLClear(VGLDisplay, 0);
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return 0;
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}
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void
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VGLCheckSwitch()
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{
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if (VGLAbortPending) {
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VGLEnd();
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exit(0);
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}
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while (VGLSwitchPending) {
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unsigned int offset;
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unsigned int len;
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int i;
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VGLSwitchPending = 0;
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if (VGLOnDisplay) {
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ioctl(0, KDENABIO, 0);
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ioctl(0, KDSETMODE, KD_GRAPHICS);
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ioctl(0, VGLMode, 0);
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VGLCurWindow = 0;
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VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
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MAP_FILE | MAP_SHARED, 0, 0);
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/* XXX: what if mmap() has failed! */
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VGLDisplay->Type = VIDBUF8; /* XXX */
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switch (VGLModeInfo.vi_mem_model) {
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case V_INFO_MM_PLANAR:
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if (VGLModeInfo.vi_depth == 4 && VGLModeInfo.vi_planes == 4) {
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF4S;
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else
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VGLDisplay->Type = VIDBUF4;
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} else {
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/* shouldn't be happening */
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}
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break;
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case V_INFO_MM_PACKED:
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if (VGLModeInfo.vi_depth == 8) {
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF8S;
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else
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VGLDisplay->Type = VIDBUF8;
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}
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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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break;
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case V_INFO_MM_DIRECT:
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switch (VGLModeInfo.vi_pixel_size) {
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case 2:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF16S;
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else
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VGLDisplay->Type = VIDBUF16;
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break;
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case 3:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF24S;
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else
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VGLDisplay->Type = VIDBUF24;
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break;
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case 4:
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if (VGLBufSize/VGLModeInfo.vi_planes > VGLAdpInfo.va_window_size)
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VGLDisplay->Type = VIDBUF32S;
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else
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VGLDisplay->Type = VIDBUF32;
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break;
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default:
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/* shouldn't be happening */
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break;
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}
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default:
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/* shouldn't be happening */
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break;
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}
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VGLDisplay->Bitmap = VGLMem;
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VGLDisplay->Xsize = VGLModeInfo.vi_width;
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VGLDisplay->Ysize = VGLModeInfo.vi_height;
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VGLSetVScreenSize(VGLDisplay, VGLDisplay->VXsize, VGLDisplay->VYsize);
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VGLPanScreen(VGLDisplay, VGLDisplay->Xorigin, VGLDisplay->Yorigin);
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switch (VGLDisplay->Type) {
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case VIDBUF4S:
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outb(0x3c6, 0xff);
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outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
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offset += len) {
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VGLSetSegment(offset);
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len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
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VGLAdpInfo.va_window_size);
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for (i = 0; i < VGLModeInfo.vi_planes; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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bcopy(&VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
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VGLMem, len);
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}
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}
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break;
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case VIDBUF4:
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case VIDBUF8X:
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outb(0x3c6, 0xff);
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outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
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outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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for (i = 0; i < VGLModeInfo.vi_planes; i++) {
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outb(0x3c4, 0x02);
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outb(0x3c5, 0x01<<i);
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bcopy(&VGLBuf[i*VGLAdpInfo.va_window_size], VGLMem,
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VGLAdpInfo.va_window_size);
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}
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break;
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case VIDBUF8:
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case VIDBUF8S:
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case VIDBUF16:
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case VIDBUF16S:
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case VIDBUF24:
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case VIDBUF24S:
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case VIDBUF32:
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case VIDBUF32S:
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for (offset = 0; offset < VGLBufSize; offset += len) {
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VGLSetSegment(offset);
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len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
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bcopy(&VGLBuf[offset], VGLMem, len);
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}
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break;
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}
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VGLRestorePalette();
|
|
ioctl(0, VT_RELDISP, VT_ACKACQ);
|
|
}
|
|
else {
|
|
switch (VGLDisplay->Type) {
|
|
case VIDBUF4S:
|
|
for (offset = 0; offset < VGLBufSize/VGLModeInfo.vi_planes;
|
|
offset += len) {
|
|
VGLSetSegment(offset);
|
|
len = min(VGLBufSize/VGLModeInfo.vi_planes - offset,
|
|
VGLAdpInfo.va_window_size);
|
|
for (i = 0; i < VGLModeInfo.vi_planes; i++) {
|
|
outb(0x3ce, 0x04);
|
|
outb(0x3cf, i);
|
|
bcopy(VGLMem, &VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
|
|
len);
|
|
}
|
|
}
|
|
break;
|
|
case VIDBUF4:
|
|
case VIDBUF8X:
|
|
/*
|
|
* NOTE: the saved buffer is NOT in the MEMBUF format which
|
|
* the ordinary memory bitmap object is stored in. XXX
|
|
*/
|
|
for (i = 0; i < VGLModeInfo.vi_planes; i++) {
|
|
outb(0x3ce, 0x04);
|
|
outb(0x3cf, i);
|
|
bcopy(VGLMem, &VGLBuf[i*VGLAdpInfo.va_window_size],
|
|
VGLAdpInfo.va_window_size);
|
|
}
|
|
break;
|
|
case VIDBUF8:
|
|
case VIDBUF8S:
|
|
case VIDBUF16:
|
|
case VIDBUF16S:
|
|
case VIDBUF24:
|
|
case VIDBUF24S:
|
|
case VIDBUF32:
|
|
case VIDBUF32S:
|
|
for (offset = 0; offset < VGLBufSize; offset += len) {
|
|
VGLSetSegment(offset);
|
|
len = min(VGLBufSize - offset, VGLAdpInfo.va_window_size);
|
|
bcopy(VGLMem, &VGLBuf[offset], len);
|
|
}
|
|
break;
|
|
}
|
|
VGLMem = MAP_FAILED;
|
|
munmap(VGLDisplay->Bitmap, VGLAdpInfo.va_window_size);
|
|
ioctl(0, VGLOldMode, 0);
|
|
ioctl(0, KDSETMODE, KD_TEXT);
|
|
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;
|
|
}
|