X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fdos%2Fdrv_vga.c;fp=src%2Fdos%2Fdrv_vga.c;h=f6b7b01fd625f786c0045c7f646d868e0470fab1;hb=4e4ac855a9d53fd7dee3d640f3ab46740b991b5c;hp=0000000000000000000000000000000000000000;hpb=f87f51babcc2d9c15e1ecaca19c26acf58292bf7;p=retroray

diff --git a/src/dos/drv_vga.c b/src/dos/drv_vga.c
new file mode 100644
index 0000000..f6b7b01
--- /dev/null
+++ b/src/dos/drv_vga.c
@@ -0,0 +1,172 @@
+#include <string.h>
+#include <conio.h>
+#include <i86.h>
+#include "vidsys.h"
+#include "drv.h"
+#include "vga.h"
+
+static int init(void);
+static void cleanup(void);
+static int setmode(int mode);
+static int curmode(void);
+
+static void setpal4(int idx, int count, const struct vid_color *col);
+static void getpal4(int idx, int count, struct vid_color *col);
+static void clear4(uint32_t color);
+static void blitfb4(void *fb, int pitch);
+static void fill4(int x, int y, int w, int h, uint32_t color);
+
+static void clear8(uint32_t color);
+static void blitfb8(void *fb, int pitch);
+static void fill8(int x, int y, int w, int h, uint32_t color);
+
+
+static struct vid_driver drv;
+static struct vid_drvops drvops = {init, cleanup, setmode, curmode};
+static struct vid_modeinfo modes[] = {
+	{3, 80, 25, 4},
+	{0x12, 640, 480, 4},
+	{0x13, 320, 200, 8}
+};
+
+static struct vid_gfxops gfxops_mode12h = {
+	0, 0, setpal4, getpal4, vid_vsync, clear4, blitfb4, 0, fill4 };
+static struct vid_gfxops gfxops_mode13h = {
+	0, 0, vga_setpal, vga_getpal, vid_vsync, clear8, blitfb8, 0, fill8 };
+
+void vid_register_vga(void)
+{
+	int i;
+
+	drv.name = "vga";
+	drv.prio = 1;
+	drv.ops = &drvops;
+	drv.modes = modes;
+	drv.num_modes = sizeof modes / sizeof *modes;
+
+	for(i=0; i<drv.num_modes; i++) {
+		modes[i].drv = &drv;
+		modes[i].vmem_addr = 0xa0000;
+
+		switch(modes[i].modeno) {
+		case 0x3:
+			modes[i].vmem_addr = 0xb8000;
+			break;
+				
+		case 0x13:
+			modes[i].ops = gfxops_mode13h;
+			break;
+
+		case 0x12:
+			modes[i].ops = gfxops_mode12h;
+			break;
+		}
+	}
+
+	vid_drvlist[vid_numdrv++] = &drv;
+}
+
+void vid_vsync(void)
+{
+	while(inp(VGA_STAT1_PORT) & 8);
+	while((inp(VGA_STAT1_PORT) & 8) == 0);
+}
+
+void vga_setpal(int idx, int count, const struct vid_color *col)
+{
+	int i;
+	outp(VGA_DAC_WADDR_PORT, idx);
+	for(i=0; i<count; i++) {
+		outp(VGA_DAC_DATA_PORT, col->r >> 2);
+		outp(VGA_DAC_DATA_PORT, col->g >> 2);
+		outp(VGA_DAC_DATA_PORT, col->b >> 2);
+		col++;
+	}
+}
+
+void vga_getpal(int idx, int count, struct vid_color *col)
+{
+	int i;
+	outp(VGA_DAC_RADDR_PORT, idx);
+	for(i=0; i<count; i++) {
+		col->r = inp(VGA_DAC_DATA_PORT) << 2;
+		col->g = inp(VGA_DAC_DATA_PORT) << 2;
+		col->b = inp(VGA_DAC_DATA_PORT) << 2;
+		col++;
+	}
+}
+
+
+static int init(void)
+{
+	return 0;
+}
+
+static void cleanup(void)
+{
+}
+
+static int setmode(int mode)
+{
+	union REGS regs = {0};
+	regs.w.ax = mode;
+	int386(0x10, &regs, &regs);
+	return 0;
+}
+
+static int curmode(void)
+{
+	union REGS regs = {0};
+	regs.w.ax = 0xf00;
+	int386(0x10, &regs, &regs);
+	return regs.x.eax & 0xff;
+}
+
+static void setpal4(int idx, int count, const struct vid_color *col)
+{
+}
+
+static void getpal4(int idx, int count, struct vid_color *col)
+{
+}
+
+static void clear4(uint32_t color)
+{
+}
+
+static void blitfb4(void *fb, int pitch)
+{
+}
+
+static void fill4(int x, int y, int w, int h, uint32_t color)
+{
+}
+
+static void clear8(uint32_t color)
+{
+	memset((void*)0xa0000, color, 64000);
+}
+
+static void blitfb8(void *fb, int pitch)
+{
+	int i;
+	unsigned char *src = fb;
+	unsigned char *dest = (unsigned char*)0xa0000;
+	for(i=0; i<200; i++) {
+		memcpy(dest, src, 320);
+		dest += 320;
+		src += pitch;
+	}
+}
+
+static void fill8(int x, int y, int w, int h, uint32_t color)
+{
+	int i;
+	unsigned char *fbptr = (unsigned char*)0xa0000;
+
+	fbptr += y * 320 + x;
+	for(i=0; i<h; i++) {
+		memset(fbptr, color, w);
+		fbptr += 320;
+	}
+}