diff options
Diffstat (limited to 'src/mesa/drivers/dos/vbeaf.c')
| -rw-r--r-- | src/mesa/drivers/dos/vbeaf.c | 607 |
1 files changed, 607 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/vbeaf.c b/src/mesa/drivers/dos/vbeaf.c new file mode 100644 index 0000000000..eef1793985 --- /dev/null +++ b/src/mesa/drivers/dos/vbeaf.c @@ -0,0 +1,607 @@ +/*
+ * Mesa 3-D graphics library
+ * Version: 4.0
+ *
+ * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/*
+ * DOS/DJGPP device driver v0.2 for Mesa 4.0
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+#include <ctype.h>
+#include <dpmi.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/exceptn.h>
+#include <sys/nearptr.h>
+
+#include "dpmiint.h"
+#include "vbeaf.h"
+
+
+
+#define MMAP unsigned long
+#define NOMM 0
+#define MVAL(a) (void *)((a)-__djgpp_base_address)
+
+
+
+#define SAFE_CALL(FUNC)\
+{ \
+ int _ds, _es, _ss; \
+ \
+ __asm__ __volatile__( \
+ " movw %%ds, %w0 ; " \
+ " movw %%es, %w1 ; " \
+ " movw %%ss, %w2 ; " \
+ " movw %w3, %%ds ; " \
+ " movw %w3, %%es ; " \
+ " movw %w3, %%ss ; " \
+ \
+ : "=&q" (_ds), \
+ "=&q" (_es), \
+ "=&q" (_ss) \
+ : "q" (__djgpp_ds_alias) \
+ ); \
+ \
+ FUNC \
+ \
+ __asm__ __volatile__( \
+ "movw %w0, %%ds ; " \
+ "movw %w1, %%es ; " \
+ "movw %w2, %%ss ; " \
+ : \
+ : "q" (_ds), \
+ "q" (_es), \
+ "q" (_ss) \
+ ); \
+}
+
+#define SAFISH_CALL(FUNC) FUNC
+
+
+
+extern void _af_int86(), _af_call_rm(), _af_wrapper_end();
+
+
+
+static AF_DRIVER *af_driver = NULL; /* the VBE/AF driver */
+int _accel_active = FALSE; /* is the accelerator busy? */
+static FAF_HWPTR_DATA *faf_farptr; /* FreeBE/AF farptr data */
+static MMAP af_memmap[4] = { NOMM, NOMM, NOMM, NOMM };
+static MMAP af_banked_mem = NOMM;
+static MMAP af_linear_mem = NOMM;
+
+
+
+__inline__ fixed itofix (int x)
+{
+ return x << 16;
+}
+
+
+
+/*
+ * loads the driver from disk
+ */
+static int load_driver (char *filename)
+{
+ FILE *f;
+ size_t size;
+
+ if ((f=fopen(filename, "rb"))!=NULL) {
+ fseek(f, 0, SEEK_END);
+ size = ftell(f);
+ fseek(f, 0, SEEK_SET);
+ if ((af_driver=(AF_DRIVER *)malloc(size))!=NULL) {
+ if (fread(af_driver, size, 1, f)) {
+ return 0;
+ } else {
+ free(af_driver);
+ }
+ }
+ fclose(f);
+ }
+
+ return -1;
+}
+
+
+
+/*
+ * Calls a VBE/AF function using the version 1.0 style asm interface.
+ */
+static int call_vbeaf_asm (void *proc)
+{
+ int ret;
+
+ proc = (void *)((long)af_driver + (long)proc);
+
+ /* use gcc-style inline asm */
+ __asm__("\n\
+ pushl %%ebx \n\
+ movl %%ecx, %%ebx \n\
+ call *%%edx \n\
+ popl %%ebx \n\
+ ": "=&a" (ret) /* return value in eax */
+ : "c" (af_driver), /* VBE/AF driver in ds:ebx */
+ "d" (proc) /* function ptr in edx */
+ : "memory" /* assume everything is clobbered */
+ );
+
+ return ret;
+}
+
+
+
+/*
+ * prepares the FreeBE/AF extension functions.
+ */
+static int initialise_freebeaf_extensions (void)
+{
+ typedef unsigned long (*EXT_INIT_FUNC)(AF_DRIVER *af, unsigned long id);
+ EXT_INIT_FUNC ext_init;
+ unsigned long magic;
+ int v1, v2;
+ void *ptr;
+
+ /* safety check */
+ if (!af_driver->OemExt) {
+ return 0;
+ }
+
+ /* call the extension init function */
+ ext_init = (EXT_INIT_FUNC)((long)af_driver + (long)af_driver->OemExt);
+
+ magic = ext_init(af_driver, FAFEXT_INIT);
+
+ /* check that it returned a nice magic number */
+ v1 = (magic>>8)&0xFF;
+ v2 = magic&0xFF;
+
+ if (((magic&0xFFFF0000) != FAFEXT_MAGIC) || (!isdigit(v1)) || (!isdigit(v2))) {
+ return 0;
+ }
+
+ /* export libc and pmode functions if the driver wants them */
+ ptr = af_driver->OemExt(af_driver, FAFEXT_LIBC);
+#ifdef _FAFEXT_LIBC
+ if (ptr)
+ _fill_vbeaf_libc_exports(ptr);
+#endif
+
+ ptr = af_driver->OemExt(af_driver, FAFEXT_PMODE);
+#ifdef _FAFEXT_PMODE
+ if (ptr)
+ _fill_vbeaf_pmode_exports(ptr);
+#endif
+
+ return (v1-'0')*10 + (v2-'0');
+}
+
+
+
+/*
+ * Sets up the DPMI memory mappings required by the VBE/AF driver,
+ * returning zero on success.
+ */
+static int initialise_vbeaf_driver (int faf_ext)
+{
+ int c;
+
+ /* query driver for the FreeBE/AF farptr extension */
+ if (faf_ext > 0)
+ faf_farptr = af_driver->OemExt(af_driver, FAFEXT_HWPTR);
+ else
+ faf_farptr = NULL;
+
+ if (faf_farptr) {
+ /* use farptr access */
+ for (c=0; c<4; c++) {
+ faf_farptr->IOMemMaps[c].sel = 0;
+ faf_farptr->IOMemMaps[c].offset = 0;
+ }
+
+ faf_farptr->BankedMem.sel = 0;
+ faf_farptr->BankedMem.offset = 0;
+
+ faf_farptr->LinearMem.sel = 0;
+ faf_farptr->LinearMem.offset = 0;
+ } else {
+ /* enable nearptr access */
+ return -5;
+ }
+
+ /* create mapping for MMIO ports */
+ for (c=0; c<4; c++) {
+ if (af_driver->IOMemoryBase[c]) {
+ if ((af_memmap[c]=_create_linear_mapping(af_driver->IOMemoryBase[c], af_driver->IOMemoryLen[c]))==NULL)
+ return -4;
+
+ if (faf_farptr) {
+ /* farptr IO mapping */
+ if ((faf_farptr->IOMemMaps[c].sel=_create_selector(af_memmap[c], af_driver->IOMemoryLen[c]))<0) {
+ _remove_linear_mapping(af_memmap+c);
+ return -4;
+ }
+ faf_farptr->IOMemMaps[c].offset = 0;
+ af_driver->IOMemMaps[c] = NULL;
+ } else {
+ /* nearptr IO mapping */
+ af_driver->IOMemMaps[c] = MVAL(af_memmap[c]);
+ }
+ }
+ }
+
+ /* create mapping for banked video RAM */
+ if (af_driver->BankedBasePtr) {
+ if ((af_banked_mem=_create_linear_mapping(af_driver->BankedBasePtr, 0x10000))==NULL)
+ return -4;
+
+ if (faf_farptr) {
+ /* farptr banked vram mapping */
+ if ((faf_farptr->BankedMem.sel=_create_selector(af_banked_mem, 0x10000))<0) {
+ _remove_linear_mapping(&af_banked_mem);
+ return -4;
+ }
+ faf_farptr->BankedMem.offset = 0;
+ af_driver->BankedMem = NULL;
+ } else {
+ /* nearptr banked vram mapping */
+ af_driver->BankedMem = MVAL(af_banked_mem);
+ }
+ }
+
+ /* create mapping for linear video RAM */
+ if (af_driver->LinearBasePtr) {
+ if ((af_linear_mem=_create_linear_mapping(af_driver->LinearBasePtr, af_driver->LinearSize*1024))==NULL)
+ return -4;
+
+ if (faf_farptr) {
+ /* farptr linear vram mapping */
+ if ((faf_farptr->LinearMem.sel=_create_selector(af_linear_mem, af_driver->LinearSize*1024))<0) {
+ _remove_linear_mapping(&af_linear_mem);
+ return -4;
+ }
+ faf_farptr->LinearMem.offset = 0;
+ af_driver->LinearMem = NULL;
+ } else {
+ /* nearptr linear vram mapping */
+ af_driver->LinearMem = MVAL(af_linear_mem);
+ }
+ }
+
+ /* callback functions: why are these needed? ugly, IMHO */
+ af_driver->Int86 = (void *)_af_int86;
+ af_driver->CallRealMode = (void *)_af_call_rm;
+
+ return 0;
+}
+
+
+
+/* go_accel:
+ * Prepares the hardware for an accelerated drawing operation.
+ */
+static __inline__ void go_accel (void)
+{
+ /* turn on the accelerator */
+ if (!_accel_active) {
+ if (af_driver->DisableDirectAccess)
+ af_driver->DisableDirectAccess(af_driver);
+
+ _accel_active = TRUE;
+ }
+}
+
+
+
+void af_exit (void)
+{
+ int c;
+
+ /* undo memory mappings */
+ if (faf_farptr) {
+ for (c=0; c<4; c++)
+ _remove_selector(&faf_farptr->IOMemMaps[c].sel);
+
+ _remove_selector(&faf_farptr->BankedMem.sel);
+ _remove_selector(&faf_farptr->LinearMem.sel);
+ }
+
+ for (c=0; c<4; c++)
+ _remove_linear_mapping(af_memmap+c);
+
+ _remove_linear_mapping(&af_banked_mem);
+ _remove_linear_mapping(&af_linear_mem);
+
+ if (af_driver) {
+ free(af_driver);
+ }
+}
+
+
+
+int af_init (char *filename)
+{
+ int faf_ext, r;
+
+ if (load_driver(filename)) {
+ /* driver not found */
+ return -1;
+ }
+
+ faf_ext = initialise_freebeaf_extensions();
+
+ /* special setup for Plug and Play hardware */
+ if (call_vbeaf_asm(af_driver->PlugAndPlayInit)) {
+ af_exit();
+ /* Plug and Play initialisation failed */
+ return -2;
+ }
+
+ if ((r=initialise_vbeaf_driver(faf_ext))) {
+ af_exit();
+ /* -4, ... */
+ return r;
+ }
+
+ /* low level driver initialisation */
+ if (call_vbeaf_asm(af_driver->InitDriver)) {
+ af_exit();
+ /* VBE/AF device not present */
+ return -3;
+ }
+
+ _go32_dpmi_lock_code((void *)_af_int86, (long)_af_wrapper_end-(long)_af_int86);
+
+ return 0;
+}
+
+
+
+#include "video.h"
+
+
+
+static long page, xres, startx, starty;
+
+
+
+AF_MODE_INFO *af_getmode (int i, int *granularity)
+{
+ static AF_MODE_INFO info;
+ int mode = af_driver->AvailableModes[i];
+
+ if ((mode==-1)||af_driver->GetVideoModeInfo(af_driver, mode, &info)) {
+ return NULL;
+ } else {
+ *granularity = af_driver->BankSize * 1024;
+ return &info;
+ }
+}
+
+
+
+void *af_dump_virtual (void *buffer, int width, int height, int pitch)
+{
+ SAFISH_CALL(
+ go_accel();
+
+ af_driver->BitBltSys(af_driver, buffer, pitch, 0, 0, width, height, startx, starty, 0);
+ );
+ return buffer;
+}
+
+
+
+void af_switch_bank (int bank)
+{
+ af_driver->SetBank(af_driver, bank);
+}
+
+
+
+int af_flip (void)
+{
+ SAFISH_CALL(
+ go_accel();
+
+ af_driver->SetDisplayStart(af_driver, page*xres, 0, 1);
+ );
+ if (page ^= 1) {
+ startx += xres;
+ } else {
+ startx -= xres;
+ }
+
+ return page;
+}
+
+
+
+void af_fillrect (void *buffer, int x, int y, int width, int height, int color)
+{
+ (void)buffer;
+ SAFISH_CALL(
+ go_accel();
+
+ af_driver->DrawRect(af_driver, color, startx+x, starty+y, width, height);
+ );
+}
+
+
+
+void af_triangle (int x1, int y1, int x2, int y2, int x3, int y3, int color)
+{
+ AF_TRAP trap;
+
+ /* sort along the vertical axis */
+ #define TRI_SWAP(a, b) \
+ { \
+ int tmp = x##a; \
+ x##a = x##b; \
+ x##b = tmp; \
+ \
+ tmp = y##a; \
+ y##a = y##b; \
+ y##b = tmp; \
+ }
+
+ if (y2 < y1)
+ TRI_SWAP(1, 2);
+
+ if (y3 < y1) {
+ TRI_SWAP(1, 3);
+ TRI_SWAP(2, 3);
+ } else if (y3 < y2)
+ TRI_SWAP(2, 3);
+
+ SAFISH_CALL(
+ go_accel();
+
+ if (y2 > y1) {
+ /* draw the top half of the triangle as one trapezoid */
+ trap.y = y1+starty;
+ trap.count = y2-y1;
+ trap.x1 = trap.x2 = itofix(x1+startx);
+ trap.slope1 = itofix(x2-x1) / (y2-y1);
+ trap.slope2 = itofix(x3-x1) / (y3-y1);
+
+ if (trap.slope1 < 0)
+ trap.x1 += MIN(trap.slope1+itofix(1), 0);
+
+ if (trap.slope2 < 0)
+ trap.x2 += MIN(trap.slope2+itofix(1), 0);
+
+ if (trap.slope1 > trap.slope2)
+ trap.x1 += MAX(ABS(trap.slope1), itofix(1));
+ else
+ trap.x2 += MAX(ABS(trap.slope2), itofix(1));
+
+ af_driver->DrawTrap(af_driver, color, &trap);
+
+ if (y3 > y2) {
+ /* draw the bottom half as a second trapezoid */
+ if (trap.slope1 < 0)
+ trap.x1 -= MIN(trap.slope1+itofix(1), 0);
+
+ if (trap.slope1 > trap.slope2)
+ trap.x1 -= MAX(ABS(trap.slope1), itofix(1));
+
+ trap.count = y3-y2;
+ trap.slope1 = itofix(x3-x2) / (y3-y2);
+
+ if (trap.slope1 < 0)
+ trap.x1 += MIN(trap.slope1+itofix(1), 0);
+
+ if (trap.x1 > trap.x2)
+ trap.x1 += MAX(ABS(trap.slope1), itofix(1));
+
+ af_driver->DrawTrap(af_driver, color, &trap);
+ }
+ } else if (y3 > y2) {
+ /* we can draw the entire thing with a single trapezoid */
+ trap.y = y1+starty;
+ trap.count = y3-y2;
+ trap.x1 = itofix(x2+startx);
+ trap.x2 = itofix(x1+startx);
+ trap.slope1 = itofix(x3-x2) / (y3-y2);
+ trap.slope2 = (y3 > y1) ? (itofix(x3-x1) / (y3-y1)) : 0;
+
+ if (trap.slope1 < 0)
+ trap.x1 += MIN(trap.slope1+itofix(1), 0);
+
+ if (trap.slope2 < 0)
+ trap.x2 += MIN(trap.slope2+itofix(1), 0);
+
+ if (trap.x1 > trap.x2)
+ trap.x1 += MAX(ABS(trap.slope1), itofix(1));
+ else
+ trap.x2 += MAX(ABS(trap.slope2), itofix(1));
+
+ af_driver->DrawTrap(af_driver, color, &trap);
+ }
+ );
+}
+
+
+
+int af_setup_mode (int mode, int caps)
+{
+ if (CHECK_SOFTDB(caps) && af_driver->BitBltSys) {
+ vl_flip = af_dump_virtual;
+ }
+ if (af_driver->SetBank) {
+ vl_switch_bank = af_switch_bank;
+ }
+ if (!CHECK_SOFTDB(caps) && af_driver->DrawRect) {
+ vl_clear = af_fillrect;
+ }
+
+ if (CHECK_SINGLE(caps) || CHECK_SOFTDB(caps)) {
+ page = 0;
+ } else {
+ page = 1;
+ }
+
+ return (mode&0x4000)?faf_farptr->LinearMem.sel:faf_farptr->BankedMem.sel;
+}
+
+
+
+int af_setup_buffer (int x, int y)
+{
+ startx = x + page*xres;
+ starty = y;
+
+ return page;
+}
+
+
+
+void *af_getprim (int primitive)
+{
+ switch (primitive) {
+ case TRI_RGB_FLAT:
+ return af_driver->DrawTrap?(void *)af_triangle:NULL;
+ default:
+ return NULL;
+ }
+}
+
+
+
+int af_enter_mode (int mode, int width, int height)
+{
+ long wret;
+ if (!af_driver->SetVideoMode(af_driver, mode, width, height, &wret, 1, NULL)) {
+ xres = width/2;
+ return wret;
+ } else {
+ return -1;
+ }
+}
|