X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fdos%2Fvbe.c;h=5b1afb51b179d61996ed2f9b728b6b7701b18534;hp=5182e0af99f15ce1977914d026756ed7f04ec5e2;hb=5f36e95f19ad8d7a5a1dd546ffeb54ce95d51749;hpb=8a64d603ee67cd98070360b40938e123ea845154

diff --git a/src/dos/vbe.c b/src/dos/vbe.c
index 5182e0a..5b1afb5 100644
--- a/src/dos/vbe.c
+++ b/src/dos/vbe.c
@@ -1,7 +1,20 @@
 #include <stdio.h>
 #include <string.h>
+#include <conio.h>
 #include "vbe.h"
-#include "dpmi.h"
+#include "cdpmi.h"
+#include "inttypes.h"
+
+#ifdef __DJGPP__
+#include <pc.h>
+#include <sys/nearptr.h>
+
+#define SEG_ADDR(s)	(((uint32_t)(s) << 4) - __djgpp_base_address)
+
+#define outp(p, v)	outportb(p, v)
+#else
+#define SEG_ADDR(s)	((uint32_t)(s) << 4)
+#endif
 
 /* VGA DAC registers used for palette setting in 8bpp modes */
 #define VGA_DAC_STATE		0x3c7
@@ -14,14 +27,14 @@
 
 struct vbe_info *vbe_get_info(void)
 {
-	static unsigned short info_block_seg;
+	static uint16_t info_block_seg, info_block_selector;
 	static struct vbe_info *info;
 	struct dpmi_real_regs regs;
 
 	if(!info) {
 		/* allocate 32 paragraphs (512 bytes) */
-		info_block_seg = dpmi_alloc(32);
-		info = (struct vbe_info*)(info_block_seg << 4);
+		info_block_seg = dpmi_alloc(32, &info_block_selector);
+		info = (struct vbe_info*)SEG_ADDR(info_block_seg);
 	}
 
 	memcpy(info->sig, "VBE2", 4);
@@ -37,14 +50,14 @@ struct vbe_info *vbe_get_info(void)
 
 struct vbe_mode_info *vbe_get_mode_info(int mode)
 {
-	static unsigned short mode_info_seg;
+	static uint16_t mode_info_seg, mode_info_selector;
 	static struct vbe_mode_info *mi;
 	struct dpmi_real_regs regs;
 
 	if(!mi) {
 		/* allocate 16 paragraphs (256 bytes) */
-		mode_info_seg = dpmi_alloc(16);
-		mi = (struct vbe_mode_info*)(mode_info_seg << 4);
+		mode_info_seg = dpmi_alloc(16, &mode_info_selector);
+		mi = (struct vbe_mode_info*)SEG_ADDR(mode_info_seg);
 	}
 
 	memset(&regs, 0, sizeof regs);
@@ -85,7 +98,7 @@ int vbe_set_palette_bits(int bits)
 	regs.ebx = bits << 8;	/* bits in bh */
 	dpmi_real_int(0x10, &regs);
 
-	if((regs.eax >> 8) & 0xff == 3) {
+	if(((regs.eax >> 8) & 0xff) == 3) {
 		return -1;
 	}
 	return regs.ebx >> 8 & 0xff;	/* new color bits in bh */
@@ -98,11 +111,7 @@ void vbe_set_palette(int idx, int *col, int count, int bits)
 {
 	int i, shift = 8 - bits;
 
-	__asm {
-		mov dx, VGA_DAC_ADDR_WR
-		mov eax, idx
-		out dx, al
-	}
+	outp(VGA_DAC_ADDR_WR, idx);
 
 	for(i=0; i<count; i++) {
 		unsigned char r = *col++;
@@ -115,18 +124,68 @@ void vbe_set_palette(int idx, int *col, int count, int bits)
 			b >>= shift;
 		}
 
-		__asm {
-			mov dx, VGA_DAC_DATA
-			mov al, r
-			out dx, al
-			mov al, g
-			out dx, al
-			mov al, b
-			out dx, al
-		}
+		outp(VGA_DAC_DATA, r);
+		outp(VGA_DAC_DATA, g);
+		outp(VGA_DAC_DATA, b);
+	}
+}
+
+int vbe_set_disp_start(int x, int y, int when)
+{
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f07;
+	regs.ebx = when & 0xffff;
+	regs.ecx = x & 0xffff;
+	regs.edx = y & 0xffff;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
 	}
+	return 0;
 }
 
+int vbe_set_scanlen(int len, int mode)
+{
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f06;
+	regs.ebx = mode;
+	regs.ecx = len & 0xffff;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
+	}
+	return regs.ecx & 0xffff;
+}
+
+int vbe_get_scanlen(int mode)
+{
+	int res;
+	struct dpmi_real_regs regs;
+
+	memset(&regs, 0, sizeof regs);
+	regs.eax = 0x4f06;
+	regs.ebx = 1;
+	dpmi_real_int(0x10, &regs);
+
+	if(regs.eax == 0x100) {
+		return -1;
+	}
+
+	if(mode == VBE_SCANLEN_PIXELS) {
+		res = regs.ecx & 0xffff;
+	} else {
+		res = regs.ebx & 0xffff;
+	}
+	return res;
+}
+
+
 static unsigned int get_mask(int sz, int pos)
 {
 	unsigned int i, mask = 0;
@@ -149,5 +208,5 @@ void print_mode_info(FILE *fp, struct vbe_mode_info *mi)
 	fprintf(fp, "red bits: %d (mask: %x)\n", (int)mi->rmask_size, get_mask(mi->rmask_size, mi->rpos));
 	fprintf(fp, "green bits: %d (mask: %x)\n", (int)mi->gmask_size, get_mask(mi->gmask_size, mi->gpos));
 	fprintf(fp, "blue bits: %d (mask: %x)\n", (int)mi->bmask_size, get_mask(mi->bmask_size, mi->bpos));
-	fprintf(fp, "framebuffer address: %x\n", mi->fb_addr);
+	fprintf(fp, "framebuffer address: %x\n", (unsigned int)mi->fb_addr);
 }