diff options
Diffstat (limited to 'src/mesa/drivers/dos/video.c')
| -rw-r--r-- | src/mesa/drivers/dos/video.c | 625 |
1 files changed, 625 insertions, 0 deletions
diff --git a/src/mesa/drivers/dos/video.c b/src/mesa/drivers/dos/video.c new file mode 100644 index 0000000000..5c2c84a84f --- /dev/null +++ b/src/mesa/drivers/dos/video.c @@ -0,0 +1,625 @@ +/*
+ * 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 v0.3 for Mesa 4.0
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+#include <dpmi.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stubinfo.h>
+#include <sys/exceptn.h>
+#include <sys/segments.h>
+#include <sys/farptr.h>
+
+#include "video.h"
+#include "dpmiint.h"
+
+
+
+typedef unsigned char word8;
+typedef unsigned short word16;
+typedef unsigned long word32;
+
+typedef struct vl_mode {
+ int mode;
+ int xres, yres;
+ int scanlen;
+ int bpp;
+} vl_mode;
+
+#define _16_ *(word16 *)&
+#define _32_ *(word32 *)&
+
+static int init;
+
+static vl_mode modes[64];
+
+/* card specific: valid forever */
+static word16 vesa_ver;
+static word32 hw_granularity, hw_linearfb;
+static unsigned int gran_shift, gran_mask;
+/* based upon mode specific data: valid entire session */
+static int video_selector, banked_selector, linear_selector;
+static int video_scanlen, video_bypp;
+/* valid until next buffer */
+static int current_offset, current_delta, current_width;
+
+
+
+/* lookup table for scaling 5 bit colors up to 8 bits */
+static int _rgb_scale_5[32] =
+{
+ 0, 8, 16, 24, 32, 41, 49, 57,
+ 65, 74, 82, 90, 98, 106, 115, 123,
+ 131, 139, 148, 156, 164, 172, 180, 189,
+ 197, 205, 213, 222, 230, 238, 246, 255
+};
+
+/* lookup table for scaling 6 bit colors up to 8 bits */
+static int _rgb_scale_6[64] =
+{
+ 0, 4, 8, 12, 16, 20, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 60,
+ 64, 68, 72, 76, 80, 85, 89, 93,
+ 97, 101, 105, 109, 113, 117, 121, 125,
+ 129, 133, 137, 141, 145, 149, 153, 157,
+ 161, 165, 170, 174, 178, 182, 186, 190,
+ 194, 198, 202, 206, 210, 214, 218, 222,
+ 226, 230, 234, 238, 242, 246, 250, 255
+};
+
+
+
+/*
+ * virtual clearing
+ */
+void (*vl_clear) (void *buffer, int len, int color);
+
+#define v_clear15 v_clear16
+extern void v_clear16 (void *buffer, int len, int color);
+extern void v_clear32 (void *buffer, int len, int color);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _v_clear16 \n\
+_v_clear16: \n\
+ movl 12(%esp), %eax \n\
+ pushw %ax \n\
+ pushw %ax \n\
+ popl %eax \n\
+ jmp _v_clear_common \n\
+ .balign 4 \n\
+ .global _v_clear32 \n\
+_v_clear32: \n\
+ movl 12(%esp), %eax \n\
+ .balign 4 \n\
+_v_clear_common: \n\
+ movl 8(%esp), %ecx \n\
+ movl 4(%esp), %edx \n\
+ shrl $2, %ecx \n\
+ 0: \n\
+ .balign 4 \n\
+ movl %eax, (%edx) \n\
+ addl $4, %edx \n\
+ decl %ecx \n\
+ jnz 0b \n\
+ ret");
+extern void v_clear24 (void *buffer, int len, int color);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _v_clear24 \n\
+_v_clear24: \n\
+ movl 8(%esp), %edx \n\
+ movl $0xaaaaaaab, %eax \n\
+ mull %edx \n\
+ movl 12(%esp), %eax \n\
+ movl %edx, %ecx \n\
+ movl 4(%esp), %edx \n\
+ pushl %ebx \n\
+ shrl %ecx \n\
+ movb 18(%esp), %bl \n\
+ .balign 4 \n\
+ 0: \n\
+ movw %ax, (%edx) \n\
+ movb %bl, 2(%edx) \n\
+ addl $3, %edx \n\
+ decl %ecx \n\
+ jnz 0b \n\
+ popl %ebx \n\
+ ret");
+
+
+
+/*
+ * virtual rectangle clearing
+ */
+void vl_rect (void *buffer, int x, int y, int width, int height, int color)
+{
+ int offset = y*current_width + x;
+ int delta = current_width - width;
+
+ for (y=0; y<height; y++) {
+ for (x=0; x<width; x++, offset++) {
+ vl_putpixel(buffer, offset, color);
+ }
+ offset += delta;
+ }
+}
+
+
+
+/*
+ * virtual dumping:
+ */
+void *(*vl_flip) (void *buffer, int width, int height);
+
+extern void *b_dump_virtual (void *buffer, int width, int height);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _b_dump_virtual \n\
+_b_dump_virtual: \n\
+ pushl %ebx \n\
+ pushl %esi \n\
+ pushl %edi \n\
+ pushl %ebp \n\
+ movl _video_selector, %fs \n\
+ movl 4*4+4+0(%esp), %esi \n\
+ movl _hw_granularity, %ebp \n\
+ xorl %edx, %edx \n\
+ movl _current_offset, %eax \n\
+ divl %ebp \n\
+ movl %edx, %edi \n\
+ pushl %eax \n\
+ movl %eax, %edx \n\
+ xorl %ebx, %ebx \n\
+ movw $0x4f05, %ax \n\
+ int $0x10 \n\
+ movl _current_delta, %ebx \n\
+ movl 5*4+4+4(%esp), %ecx \n\
+ movl 5*4+4+8(%esp), %edx \n\
+ shrl $2, %ecx \n\
+ .balign 4 \n\
+ 0: \n\
+ pushl %ecx \n\
+ .balign 4 \n\
+ 1: \n\
+ cmpl %ebp, %edi \n\
+ jb 2f \n\
+ pushl %ebx \n\
+ pushl %edx \n\
+ incl 12(%esp) \n\
+ movw $0x4f05, %ax \n\
+ movl 12(%esp), %edx \n\
+ xorl %ebx, %ebx \n\
+ int $0x10 \n\
+ popl %edx \n\
+ popl %ebx \n\
+ subl %ebp, %edi \n\
+ 2: \n\
+ movl (%esi), %eax \n\
+ addl $4, %esi \n\
+ movl %eax, %fs:(%edi) \n\
+ addl $4, %edi \n\
+ decl %ecx \n\
+ jnz 1b \n\
+ popl %ecx \n\
+ addl %ebx, %edi \n\
+ decl %edx \n\
+ jnz 0b \n\
+ popl %eax \n\
+ popl %ebp \n\
+ popl %edi \n\
+ popl %esi \n\
+ popl %ebx \n\
+ ret");
+extern void *l_dump_virtual (void *buffer, int width, int height);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _l_dump_virtual \n\
+_l_dump_virtual: \n\
+ pushl %ebx \n\
+ pushl %esi \n\
+ pushl %edi \n\
+ movl _video_selector, %fs \n\
+ movl 3*4+4+0(%esp), %esi \n\
+ movl _current_offset, %edi \n\
+ movl 3*4+4+4(%esp), %ecx \n\
+ movl 3*4+4+8(%esp), %edx \n\
+ movl _current_delta, %ebx \n\
+ shrl $2, %ecx \n\
+ .balign 4 \n\
+ 0: \n\
+ pushl %ecx \n\
+ .balign 4 \n\
+ 1: \n\
+ movl (%esi), %eax \n\
+ addl $4, %esi \n\
+ movl %eax, %fs:(%edi) \n\
+ addl $4, %edi \n\
+ decl %ecx \n\
+ jnz 1b \n\
+ popl %ecx \n\
+ addl %ebx, %edi \n\
+ decl %edx \n\
+ jnz 0b \n\
+ popl %edi \n\
+ popl %esi \n\
+ popl %ebx \n\
+ ret");
+
+
+
+/*
+ * mix RGBA components
+ */
+int (*vl_mixrgba) (const unsigned char rgba[]);
+
+#define vl_mixrgba15 vl_mixrgb15
+#define vl_mixrgba16 vl_mixrgb16
+#define vl_mixrgba24 vl_mixrgb24
+static int vl_mixrgba32 (const unsigned char rgba[])
+{
+ return (rgba[3]<<24)|(rgba[0]<<16)|(rgba[1]<<8)|(rgba[2]);
+}
+
+
+
+/*
+ * mix RGB components
+ */
+int (*vl_mixrgb) (const unsigned char rgb[]);
+
+static int vl_mixrgb15 (const unsigned char rgb[])
+{
+ return ((rgb[0]>>3)<<10)|((rgb[1]>>3)<<5)|(rgb[2]>>3);
+}
+static int vl_mixrgb16 (const unsigned char rgb[])
+{
+ return ((rgb[0]>>3)<<11)|((rgb[1]>>2)<<5)|(rgb[2]>>3);
+}
+#define vl_mixrgb24 vl_mixrgb32
+static int vl_mixrgb32 (const unsigned char rgb[])
+{
+ return (rgb[0]<<16)|(rgb[1]<<8)|(rgb[2]);
+}
+
+
+
+/*
+ * vl_putpixel*
+ */
+void (*vl_putpixel) (void *buffer, int offset, int color);
+
+#define v_putpixel15 v_putpixel16
+extern void v_putpixel16 (void *buffer, int offset, int color);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _v_putpixel16 \n\
+_v_putpixel16: \n\
+ movl 8(%esp), %edx \n\
+ shll %edx \n\
+ movl 12(%esp), %eax \n\
+ addl 4(%esp), %edx \n\
+ movw %ax, (%edx) \n\
+ ret");
+extern void v_putpixel24 (void *buffer, int offset, int color);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _v_putpixel24 \n\
+_v_putpixel24: \n\
+ movl 8(%esp), %edx \n\
+ leal (%edx, %edx, 2), %edx \n\
+ movl 12(%esp), %eax \n\
+ addl 4(%esp), %edx \n\
+ movw %ax, (%edx) \n\
+ shrl $16, %eax \n\
+ movb %al, 2(%edx) \n\
+ ret");
+extern void v_putpixel32 (void *buffer, int offset, int color);
+__asm__("\n\
+ .text \n\
+ .balign 4 \n\
+ .global _v_putpixel32 \n\
+_v_putpixel32: \n\
+ movl 8(%esp), %edx \n\
+ shll $2, %edx \n\
+ movl 12(%esp), %eax \n\
+ addl 4(%esp), %edx \n\
+ movl %eax, (%edx) \n\
+ ret");
+
+
+
+/*
+ * get pixel and decompose R, G, B, A
+ */
+void (*vl_getrgba) (void *buffer, int offset, unsigned char rgba[4]);
+
+/*
+ * v_getrgba*
+ */
+static void v_getrgba15 (void *buffer, int offset, unsigned char rgba[4])
+{
+ int c = ((word16 *)buffer)[offset];
+ rgba[0] = _rgb_scale_5[(c >> 10) & 0x1F];
+ rgba[1] = _rgb_scale_5[(c >> 5) & 0x1F];
+ rgba[2] = _rgb_scale_5[c & 0x1F];
+ rgba[3] = 255;
+}
+static void v_getrgba16 (void *buffer, int offset, unsigned char rgba[4])
+{
+ int c = ((word16 *)buffer)[offset];
+ rgba[0] = _rgb_scale_5[(c >> 11) & 0x1F];
+ rgba[1] = _rgb_scale_6[(c >> 5) & 0x3F];
+ rgba[2] = _rgb_scale_5[c & 0x1F];
+ rgba[3] = 255;
+}
+static void v_getrgba24 (void *buffer, int offset, unsigned char rgba[4])
+{
+ int c = *(word32 *)((long)buffer+offset*3);
+ rgba[0] = c >> 16;
+ rgba[1] = c >> 8;
+ rgba[2] = c;
+ rgba[3] = 255;
+}
+static void v_getrgba32 (void *buffer, int offset, unsigned char rgba[4])
+{
+ int c = ((word32 *)buffer)[offset];
+ rgba[0] = c >> 16;
+ rgba[1] = c >> 8;
+ rgba[2] = c;
+ rgba[3] = c >> 24;
+}
+
+
+
+/*
+ * sync buffer with video hardware
+ */
+void *vl_sync_buffer (void *buffer, int x, int y, int width, int height)
+{
+ void *newbuf;
+
+ if (width&3) {
+ return NULL;
+ } else {
+ current_offset = video_scanlen * y + video_bypp * x;
+ if ((newbuf=realloc(buffer, width*height*video_bypp))!=NULL) {
+ current_width = width;
+ current_delta = video_scanlen - video_bypp * width;
+ return newbuf;
+ } else {
+ return NULL;
+ }
+ }
+}
+
+
+
+/*
+ * attempts to detect VESA and video modes
+ */
+static word16 vl_vesa_init (void)
+{
+ __dpmi_regs r;
+ unsigned short *p;
+ vl_mode *q;
+ char vesa_info[512], tmp[512];
+ int maxsize = 0;
+
+ _farpokel(_stubinfo->ds_selector, 0, 0x32454256);
+ r.x.ax = 0x4f00;
+ r.x.di = 0;
+ r.x.es = _stubinfo->ds_segment;
+ __dpmi_int(0x10, &r);
+ if (r.x.ax==0x004f) {
+ movedata(_stubinfo->ds_selector, 0, _my_ds(), (unsigned)vesa_info, 512);
+ if ((_32_ vesa_info[0])==0x41534556) {
+ p = (unsigned short *)(((_16_ vesa_info[0x10])<<4) + (_16_ vesa_info[0x0e]));
+ q = modes;
+ do {
+ if ((q->mode=_farpeekw(__djgpp_dos_sel, (unsigned long)(p++)))==0xffff) {
+ break;
+ }
+
+ r.x.ax = 0x4f01;
+ r.x.cx = q->mode;
+ r.x.di = 512;
+ r.x.es = _stubinfo->ds_segment;
+ __dpmi_int(0x10, &r);
+ movedata(_stubinfo->ds_selector, 512, _my_ds(), (unsigned)tmp, 256);
+ switch (tmp[0x19]) {
+ case 16:
+ q->bpp = tmp[0x1f] + tmp[0x21] + tmp[0x23];
+ break;
+ case 15:
+ case 24:
+ case 32:
+ q->bpp = tmp[0x19];
+ break;
+ default:
+ q->bpp = 0;
+ }
+ if ((r.x.ax==0x004f)&&((tmp[0]&0x11)==0x11)&&q->bpp) {
+ q->xres = _16_ tmp[0x12];
+ q->yres = _16_ tmp[0x14];
+ q->scanlen = _16_ tmp[0x10];
+ hw_granularity = (_16_ tmp[4])<<10;
+ if (tmp[0]&0x80) {
+ *(q+1) = *q++;
+ hw_linearfb = _32_ tmp[0x28];
+ q->mode |= 0x4000;
+ }
+ if (maxsize<(q->scanlen*q->yres)) {
+ maxsize = q->scanlen*q->yres;
+ }
+ q++;
+ }
+ } while (!0);
+
+ if (hw_linearfb) {
+ maxsize = ((maxsize+0xfffUL)&~0xfffUL);
+ if (_create_selector(&linear_selector, hw_linearfb, maxsize)) {
+ return 0;
+ }
+ }
+ if (_create_selector(&banked_selector, 0xa0000, hw_granularity)) {
+ _remove_selector(&linear_selector);
+ return 0;
+ }
+
+ return _16_ vesa_info[4];
+ }
+ }
+
+ return 0;
+}
+
+
+
+/*
+ * setup mode
+ */
+static int vl_setup_mode (vl_mode *p)
+{
+ if (p->mode&0x4000) {
+ video_selector = linear_selector;
+ vl_flip = l_dump_virtual;
+ } else {
+ { int n; for (gran_shift=0, n=hw_granularity; n; gran_shift++, n>>=1) ; }
+ gran_mask = (1<<(--gran_shift)) - 1;
+ if (hw_granularity!=(gran_mask+1)) {
+ return -1;
+ }
+ video_selector = banked_selector;
+ vl_flip = b_dump_virtual;
+ }
+
+#define INITPTR(bpp) \
+ vl_putpixel = v_putpixel##bpp; \
+ vl_getrgba = v_getrgba##bpp; \
+ vl_clear = v_clear##bpp; \
+ vl_mixrgb = vl_mixrgb##bpp; \
+ vl_mixrgba = vl_mixrgba##bpp;
+
+ switch (p->bpp) {
+ case 15:
+ INITPTR(15);
+ break;
+ case 16:
+ INITPTR(16);
+ break;
+ case 24:
+ INITPTR(24);
+ break;
+ case 32:
+ INITPTR(32);
+ break;
+ default:
+ return -1;
+ }
+
+#undef INITPTR
+
+ video_bypp = (p->bpp+7)/8;
+ video_scanlen = p->scanlen;
+
+ return 0;
+}
+
+
+
+/*
+ * shutdown the video engine
+ */
+void vl_video_exit (int textmode)
+{
+ if (init) {
+ if (textmode) {
+ __asm__("movw $0x3, %%ax; int $0x10":::"%eax");
+ }
+
+ _remove_selector(&linear_selector);
+ _remove_selector(&banked_selector);
+
+ init = !init;
+ }
+}
+
+
+
+/*
+ * initialize video engine
+ *
+ * success: 0
+ * failure: -1
+ */
+int vl_video_init (int width, int height, int bpp)
+{
+ vl_mode *p, *q;
+ unsigned int min;
+
+ /* check for prior initialization */
+ if (init) {
+ return 0;
+ }
+
+ /* initialize hardware */
+ if (!(vesa_ver=vl_vesa_init())) {
+ return -1;
+ }
+ init = !init;
+
+ /* search for a mode that fits our request */
+ for (min=-1, p=NULL, q=modes; q->mode!=0xffff; q++) {
+ if ((q->xres>=width)&&(q->yres>=height)&&(q->bpp==bpp)) {
+ if (min>=(unsigned)(q->xres*q->yres)) {
+ min = q->xres*q->yres;
+ p = q;
+ }
+ }
+ }
+
+ if (p) {
+ vl_setup_mode(p);
+ __asm__("movw $0x4f02, %%ax; int $0x10"::"b"(p->mode):"%eax");
+ return 0;
+ } else {
+ /* no suitable mode found, abort */
+ vl_video_exit(0);
+ return -1;
+ }
+}
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