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freebsd-dev/lib/libvgl/main.c
Pedro F. Giffuni 5e53a4f90f lib: further adoption of SPDX licensing ID tags. 
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-26 02:00:33 +00:00

577 lines
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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1991-1997 Søren Schmidt
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <sys/types.h>
#include <sys/signal.h>
#include <sys/file.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <sys/fbio.h>
#include <sys/kbio.h>
#include <sys/consio.h>
#include "vgl.h"
/* XXX Direct Color 24bits modes unsupported */
#define min(x, y) (((x) < (y)) ? (x) : (y))
#define max(x, y) (((x) > (y)) ? (x) : (y))
VGLBitmap *VGLDisplay;
video_info_t VGLModeInfo;
video_adapter_info_t VGLAdpInfo;
byte *VGLBuf;
static int VGLMode;
static int VGLOldMode;
static size_t VGLBufSize;
static byte *VGLMem = MAP_FAILED;
static int VGLSwitchPending;
static int VGLAbortPending;
static int VGLOnDisplay;
static unsigned int VGLCurWindow;
static int VGLInitDone = 0;
static vid_info_t VGLOldVInfo;
void
VGLEnd()
{
struct vt_mode smode;
if (!VGLInitDone)
return;
VGLInitDone = 0;
VGLSwitchPending = 0;
VGLAbortPending = 0;
signal(SIGUSR1, SIG_IGN);
if (VGLMem != MAP_FAILED) {
VGLClear(VGLDisplay, 0);
munmap(VGLMem, VGLAdpInfo.va_window_size);
}
if (VGLOldMode >= M_VESA_BASE) {
/* ugly, but necessary */
ioctl(0, _IO('V', VGLOldMode - M_VESA_BASE), 0);
if (VGLOldMode == M_VESA_800x600) {
int size[3];
size[0] = VGLOldVInfo.mv_csz;
size[1] = VGLOldVInfo.mv_rsz;
size[2] = 16;
ioctl(0, KDRASTER, size);
}
} else {
ioctl(0, _IO('S', VGLOldMode), 0);
}
ioctl(0, KDDISABIO, 0);
ioctl(0, KDSETMODE, KD_TEXT);
smode.mode = VT_AUTO;
ioctl(0, VT_SETMODE, &smode);
if (VGLBuf)
free(VGLBuf);
VGLBuf = NULL;
free(VGLDisplay);
VGLDisplay = NULL;
VGLKeyboardEnd();
}
static void
VGLAbort(int arg __unused)
{
VGLAbortPending = 1;
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
signal(SIGSEGV, SIG_IGN);
signal(SIGBUS, SIG_IGN);
signal(SIGUSR2, SIG_IGN);
}
static void
VGLSwitch(int arg __unused)
{
if (!VGLOnDisplay)
VGLOnDisplay = 1;
else
VGLOnDisplay = 0;
VGLSwitchPending = 1;
signal(SIGUSR1, VGLSwitch);
}
int
VGLInit(int mode)
{
struct vt_mode smode;
int adptype;
if (VGLInitDone)
return -1;
signal(SIGUSR1, VGLSwitch);
signal(SIGINT, VGLAbort);
signal(SIGTERM, VGLAbort);
signal(SIGSEGV, VGLAbort);
signal(SIGBUS, VGLAbort);
signal(SIGUSR2, SIG_IGN);
VGLOnDisplay = 1;
VGLSwitchPending = 0;
VGLAbortPending = 0;
if (ioctl(0, CONS_GET, &VGLOldMode) || ioctl(0, CONS_CURRENT, &adptype))
return -1;
if (IOCGROUP(mode) == 'V') /* XXX: this is ugly */
VGLModeInfo.vi_mode = (mode & 0x0ff) + M_VESA_BASE;
else
VGLModeInfo.vi_mode = mode & 0x0ff;
if (ioctl(0, CONS_MODEINFO, &VGLModeInfo)) /* FBIO_MODEINFO */
return -1;
/* If current mode is VESA_800x600 then save its geometry to restore later */
if ((VGLOldMode >= M_VESA_BASE) && (VGLOldMode == M_VESA_800x600)) {
VGLOldVInfo.size = sizeof(VGLOldVInfo);
if (ioctl(0, CONS_GETINFO, &VGLOldVInfo))
return -1;
}
VGLDisplay = (VGLBitmap *)malloc(sizeof(VGLBitmap));
if (VGLDisplay == NULL)
return -2;
if (ioctl(0, KDENABIO, 0)) {
free(VGLDisplay);
return -3;
}
VGLInitDone = 1;
/*
* vi_mem_model specifies the memory model of the current video mode
* in -CURRENT.
*/
switch (VGLModeInfo.vi_mem_model) {
case V_INFO_MM_PLANAR:
/* we can handle EGA/VGA planner modes only */
if (VGLModeInfo.vi_depth != 4 || VGLModeInfo.vi_planes != 4
|| (adptype != KD_EGA && adptype != KD_VGA)) {
VGLEnd();
return -4;
}
VGLDisplay->Type = VIDBUF4;
break;
case V_INFO_MM_PACKED:
/* we can do only 256 color packed modes */
if (VGLModeInfo.vi_depth != 8) {
VGLEnd();
return -4;
}
VGLDisplay->Type = VIDBUF8;
VGLDisplay->PixelBytes = 1;
break;
case V_INFO_MM_VGAX:
VGLDisplay->Type = VIDBUF8X;
VGLDisplay->PixelBytes = 1;
break;
case V_INFO_MM_DIRECT:
VGLDisplay->PixelBytes = VGLModeInfo.vi_pixel_size;
switch (VGLDisplay->PixelBytes) {
case 2:
VGLDisplay->Type = VIDBUF16;
break;
#if notyet
case 3:
VGLDisplay->Type = VIDBUF24;
break;
#endif
case 4:
VGLDisplay->Type = VIDBUF32;
break;
default:
VGLEnd();
return -4;
}
break;
default:
VGLEnd();
return -4;
}
ioctl(0, VT_WAITACTIVE, 0);
ioctl(0, KDSETMODE, KD_GRAPHICS);
if (ioctl(0, mode, 0)) {
VGLEnd();
return -5;
}
if (ioctl(0, CONS_ADPINFO, &VGLAdpInfo)) { /* FBIO_ADPINFO */
VGLEnd();
return -6;
}
/*
* Calculate the shadow screen buffer size. In -CURRENT, va_buffer_size
* always holds the entire frame buffer size, wheather it's in the linear
* 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:
* VGLAdpInfo.va_line_width*VGLModeInfo.vi_height*VGLModeInfo.vi_planes
* or
* 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;
VGLBuf = malloc(VGLBufSize);
if (VGLBuf == NULL) {
VGLEnd();
return -7;
}
#ifdef LIBVGL_DEBUG
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;
break;
case VIDBUF8:
VGLDisplay->Type = VIDBUF8S;
break;
case VIDBUF16:
VGLDisplay->Type = VIDBUF16S;
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;
VGLDisplay->VXsize = VGLAdpInfo.va_line_width
*8/(VGLModeInfo.vi_depth/VGLModeInfo.vi_planes);
VGLDisplay->VYsize = VGLBufSize/VGLModeInfo.vi_planes/VGLAdpInfo.va_line_width;
VGLDisplay->Xorigin = 0;
VGLDisplay->Yorigin = 0;
VGLMem = (byte*)mmap(0, VGLAdpInfo.va_window_size, PROT_READ|PROT_WRITE,
MAP_FILE, 0, 0);
if (VGLMem == MAP_FAILED) {
VGLEnd();
return -7;
}
VGLDisplay->Bitmap = VGLMem;
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",
VGLDisplay->Xsize, VGLDisplay->Ysize,
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
VGLCheckSwitch()
{
if (VGLAbortPending) {
VGLEnd();
exit(0);
}
while (VGLSwitchPending) {
unsigned int offset;
unsigned int len;
int i;
VGLSwitchPending = 0;
if (VGLOnDisplay) {
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, 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);
VGLPanScreen(VGLDisplay, VGLDisplay->Xorigin, VGLDisplay->Yorigin);
switch (VGLDisplay->Type) {
case VIDBUF4S:
outb(0x3c6, 0xff);
outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
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(0x3c4, 0x02);
outb(0x3c5, 0x01<<i);
bcopy(&VGLBuf[i*VGLBufSize/VGLModeInfo.vi_planes + offset],
VGLMem, len);
}
}
break;
case VIDBUF4:
case VIDBUF8X:
outb(0x3c6, 0xff);
outb(0x3ce, 0x01); outb(0x3cf, 0x00); /* set/reset enable */
outb(0x3ce, 0x08); outb(0x3cf, 0xff); /* bit mask */
for (i = 0; i < VGLModeInfo.vi_planes; i++) {
outb(0x3c4, 0x02);
outb(0x3c5, 0x01<<i);
bcopy(&VGLBuf[i*VGLAdpInfo.va_window_size], VGLMem,
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(&VGLBuf[offset], VGLMem, len);
}
break;
}
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)
{
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 */
object->VXsize = VGLAdpInfo.va_line_width
*8/(VGLModeInfo.vi_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;
}
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