From ee6be1955413171a03391c6b171d50bb3f2a5001 Mon Sep 17 00:00:00 2001 From: John Tsiombikas Date: Sat, 24 Jun 2023 14:48:54 +0300 Subject: [PATCH] initial commit --- .gitignore | 5 + COPYING | 674 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Makefile | 17 ++ cdpmi.c | 102 +++++++++ cdpmi.h | 39 ++++ drv.h | 22 ++ drv_s3.c | 8 + drv_vbe.c | 172 ++++++++++++++++ drv_vga.c | 174 ++++++++++++++++ main.c | 88 ++++++++ sizeint.h | 35 ++++ vbe.h | 241 ++++++++++++++++++++++ vga.h | 93 +++++++++ vidsys.c | 179 ++++++++++++++++ vidsys.h | 69 +++++++ 15 files changed, 1918 insertions(+) create mode 100644 .gitignore create mode 100644 COPYING create mode 100644 Makefile create mode 100644 cdpmi.c create mode 100644 cdpmi.h create mode 100644 drv.h create mode 100644 drv_s3.c create mode 100644 drv_vbe.c create mode 100644 drv_vga.c create mode 100644 main.c create mode 100644 sizeint.h create mode 100644 vbe.h create mode 100644 vga.h create mode 100644 vidsys.c create mode 100644 vidsys.h diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ee43117 --- /dev/null +++ b/.gitignore @@ -0,0 +1,5 @@ +*.obj +*.swp +*.exe +*.err +*.conf diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..f288702 --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..9c88263 --- /dev/null +++ b/Makefile @@ -0,0 +1,17 @@ +obj = main.obj vidsys.obj cdpmi.obj drv_vga.obj drv_vbe.obj drv_s3.obj + +bin = test.exe + +CC = wcc386 +LD = wlink +CFLAGS = -d3 -s -zq -bt=dos + +$(bin): $(obj) + $(LD) name $@ debug all system dos4g file { $(obj) } $(LDFLAGS) + +.c.obj: + $(CC) -fo=$@ $(CFLAGS) $< + +clean: .symbolic + del *.obj + del $(bin) diff --git a/cdpmi.c b/cdpmi.c new file mode 100644 index 0000000..62e877a --- /dev/null +++ b/cdpmi.c @@ -0,0 +1,102 @@ +#include +#include +#include "cdpmi.h" + +#define LOWBUF_SIZE 8192 +#define RMSTACK_SIZE 4096 + +static char *lowbuf, *lowfree; +static uint16_t lowbuf_sel, lowbuf_seg; + +int dpmi_init(void) +{ + if(!(lowbuf_seg = dpmi_alloc(LOWBUF_SIZE >> 4, &lowbuf_sel))) { + fprintf(stderr, "DPMI init failed to allocate low memory buffer\n"); + return -1; + } + lowbuf = (char*)((intptr_t)lowbuf_seg << 4); + lowfree = lowbuf + RMSTACK_SIZE; + return 0; +} + +void dpmi_cleanup(void) +{ + if(!lowbuf_sel) return; + dpmi_free(lowbuf_sel); + lowbuf = 0; + lowbuf_sel = 0; + lowbuf_seg = 0; +} + +void *dpmi_lowbuf(void) +{ + return lowfree; +} + +uint16_t dpmi_alloc(unsigned int par, uint16_t *sel) +{ + union REGS regs = {0}; + + regs.w.ax = 0x100; + regs.w.bx = par; + int386(0x31, ®s, ®s); + if(regs.w.cflag != 0) { + return 0; + } + *sel = regs.w.dx; + return regs.w.ax; +} + +void dpmi_free(uint16_t sel) +{ + union REGS regs = {0}; + + regs.w.ax = 0x101; + regs.w.dx = sel; + int386(0x31, ®s, ®s); +} + +int dpmi_rmint(int inum, struct dpmi_regs *dregs) +{ + union REGS regs = {0}; + struct SREGS sregs = {0}; + + regs.x.eax = 0x300; + regs.x.ebx = inum; + sregs.es = FP_SEG(dregs); + regs.x.edi = FP_OFF(dregs); + sregs.ss = lowbuf_seg; /* 4k real mode stack */ + int386x(0x31, ®s, ®s, &sregs); + if(regs.x.cflag != 0) { + return -1; + } + return 0; +} + +void *dpmi_mmap(uint32_t phys_addr, unsigned int size) +{ + union REGS regs = {0}; + + regs.w.ax = 0x800; + regs.w.bx = phys_addr >> 16; + regs.w.cx = phys_addr & 0xffff; + regs.w.si = size >> 16; + regs.w.di = size & 0xffff; + int386(0x31, ®s, ®s); + if(regs.w.cflag != 0) { + return 0; + } + + return (void*)(((intptr_t)regs.w.bx << 16) | (intptr_t)regs.w.cx); +} + +void dpmi_munmap(void *ptr) +{ + union REGS regs = {0}; + intptr_t addr = (intptr_t)ptr; + + regs.w.ax = 0x801; + regs.w.bx = addr >> 16; + regs.w.cx = addr & 0xffff; + int386(0x31, ®s, ®s); +} diff --git a/cdpmi.h b/cdpmi.h new file mode 100644 index 0000000..751f2d2 --- /dev/null +++ b/cdpmi.h @@ -0,0 +1,39 @@ +#ifndef CDPMI_H_ +#define CDPMI_H_ + +#include +#include "sizeint.h" + +#pragma pack (push, 1) +struct dpmi_regs { + uint32_t edi, esi, ebp; + uint32_t reserved; + uint32_t ebx, edx, ecx, eax; + uint16_t flags; + uint16_t es, ds, fs, gs; + uint16_t ip, cs, sp, ss; +}; +#pragma pack (pop) + +enum { + FLAGS_CF = 0x000001, + FLAGS_PF = 0x000004, + FLAGS_ZF = 0x000040, + FLAGS_SF = 0x000080, + FLAGS_IF = 0x000020, + FLAGS_DF = 0x000040, + FLAGS_VM = 0x020000, + FLAGS_ID = 0x200000, +}; + +int dpmi_init(void); +void dpmi_cleanup(void); +void *dpmi_lowbuf(void); + +uint16_t dpmi_alloc(unsigned int par, uint16_t *sel); +void dpmi_free(uint16_t sel); +int dpmi_rmint(int inum, struct dpmi_regs *regs); +void *dpmi_mmap(uint32_t phys_addr, unsigned int size); +void dpmi_munmap(void *addr); + +#endif /* CDPMI_H_ */ diff --git a/drv.h b/drv.h new file mode 100644 index 0000000..ef8ef30 --- /dev/null +++ b/drv.h @@ -0,0 +1,22 @@ +#ifndef DRV_H_ +#define DRV_H_ + +#include "sizeint.h" + +struct vid_drvops { + int (*init)(void); + void (*cleanup)(void); + + int (*setmode)(int mode); + int (*curmode)(void); +}; + +#define MAX_DRV 16 +extern struct vid_driver *vid_drvlist[MAX_DRV]; +extern int vid_numdrv; + +void vid_register_vga(void); /* drv_vga.c */ +void vid_register_vbe(void); /* drv_vbe.c */ +void vid_register_s3(void); /* drv_s3.c */ + +#endif /* DRV_H_ */ diff --git a/drv_s3.c b/drv_s3.c new file mode 100644 index 0000000..02287a4 --- /dev/null +++ b/drv_s3.c @@ -0,0 +1,8 @@ + +#include +#include +#include "drv.h" + +void vid_register_s3(void) +{ +} diff --git a/drv_vbe.c b/drv_vbe.c new file mode 100644 index 0000000..e051692 --- /dev/null +++ b/drv_vbe.c @@ -0,0 +1,172 @@ +#include +#include +#include +#include "vidsys.h" +#include "drv.h" +#include "vbe.h" +#include "cdpmi.h" + +#define farptr_to_linear(rmaddr) \ + ((((intptr_t)(rmaddr) >> 12) & 0xffff0) + ((intptr_t)(rmaddr) & 0xffff)) + +static int init(void); +static void cleanup(void); +static int setmode(int mode); +static int getmode(void); +static const char *memsize_str(long sz); +static int get_mode_info(int mode, struct vbe_mode_info *mi); +static int conv_vbeinfo(int mode, struct vid_modeinfo *mi, struct vbe_mode_info *vbemi); + +static struct vid_driver drv = {"vbe", 2}; +static struct vid_drvops drvops = {init, cleanup, setmode, getmode}; +static struct vid_modeinfo *modes; +static int num_modes; +static unsigned int vbe_ver; + + +void vid_register_vbe(void) +{ + drv.ops = &drvops; + + vid_drvlist[vid_numdrv++] = &drv; +} + + +static int init(void) +{ + struct dpmi_regs regs = {0}; + struct vbe_info *vbe; + struct vbe_mode_info vbemi; + unsigned short bufseg; + uint16_t *vbe_modelist, *modelist; + int i, count; + struct vid_modeinfo modeinf; + + vbe = dpmi_lowbuf(); + bufseg = (intptr_t)vbe >> 4; + + /* call VBE function 00 (get controller information) */ + memcpy(vbe->sig, "VBE2", 4); /* denote we want VBE 2.0 info */ + regs.eax = 0x4f00; + regs.es = bufseg; + dpmi_rmint(0x10, ®s); + if(regs.eax != 0x4f || memcmp(vbe->sig, "VESA", 4) != 0) { + fprintf(stderr, "failed to get VBE controller information\n"); + return -1; + } + + vbe_ver = vbe->ver; + + printf("Found VBE %d.%d\n", vbe_ver >> 8, vbe_ver & 0xff); + printf("OEM: %s\n", (char*)farptr_to_linear(vbe->oem_name)); + if(vbe_ver >= 0x0200) { + printf("%s - %s (%s)\n", (char*)farptr_to_linear(vbe->vendor), + (char*)farptr_to_linear(vbe->product), + (char*)farptr_to_linear(vbe->revstr)); + } + printf("Video RAM: %s\n", memsize_str((long)vbe->vmem_blk * 65536)); + + vbe_modelist = (uint16_t*)farptr_to_linear(vbe->modelist_addr); + count = 0; + for(i=0; i<1024; i++) { + if(vbe_modelist[i] == 0xffff) break; + count++; + } + + if(!(modelist = malloc(count * sizeof *modelist))) { + fprintf(stderr, "failed to allocate mode list\n"); + return -1; + } + for(i=0; i 1024 && suffix[cnt + 1]) { + sz >>= 10; + cnt++; + } + + sprintf(buf, "%ld %s", sz, suffix[cnt]); + return buf; +} + +static int get_mode_info(int mode, struct vbe_mode_info *mi) +{ + struct dpmi_regs regs = {0}; + struct vbe_mode_info *miptr; + uint16_t bufseg; + + miptr = dpmi_lowbuf(); + bufseg = (intptr_t)miptr >> 4; + + regs.eax = 0x4f01; + regs.ecx = mode; + regs.es = bufseg; + dpmi_rmint(0x10, ®s); + if(regs.eax != 0x4f) { + return -1; + } + + *mi = *miptr; + return 0; +} + +static int conv_vbeinfo(int mode, struct vid_modeinfo *mi, struct vbe_mode_info *vbemi) +{ + static const struct { int width, height, bpp; } stdmode[] = { + {640, 400, 8}, /* 100h */ + {640, 480, 8}, /* 101h */ + {800, 600, 4}, /* 102h */ + {800, 600, 8}, /* 103h */ + {1024, 768, 4}, /* 104h */ + {1024, 768, 8}, /* 105h */ + {1280, 1024, 4}, /* 106h */ + {1280, 1024, 8} /* 107h */ + }; + if(vbe_ver >= 0x0102) { + mi->width = vbemi->xres; + mi->height = vbemi->yres; + mi->bpp = vbemi->bpp; + } else { + if((mode & 0xff) > 7) { + return -1; + } + mi->width = stdmode[mode & 0xff].width; + mi->height = stdmode[mode & 0xff].height; + mi->bpp = stdmode[mode & 0xff].bpp; + } + return 0; +} diff --git a/drv_vga.c b/drv_vga.c new file mode 100644 index 0000000..5410b60 --- /dev/null +++ b/drv_vga.c @@ -0,0 +1,174 @@ +#include +#include +#include +#include "vidsys.h" +#include "drv.h" +#include "vga.h" + +void vga_vsync(void); + +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, vga_vsync, clear4, blitfb4, 0, fill4 }; +static struct vid_gfxops gfxops_mode13h = { + 0, 0, vga_setpal, vga_getpal, vga_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; ir >> 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; ir = 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, ®s, ®s); + return 0; +} + +static int curmode(void) +{ + union REGS regs = {0}; + regs.w.ax = 0xf00; + int386(0x10, ®s, ®s); + 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 +#include +#include +#include "vidsys.h" + +void test8bpp(void); + +struct vid_modeinfo *vm; +void *vmem; + +int main(int argc, char **argv) +{ + int mode; + int xres = 320; + int yres = 200; + int bpp = 8; + + if(vid_init() == -1) { + fprintf(stderr, "failed to initialize video\n"); + return 1; + } + printf("press any key...\n"); + getch(); + + if((mode = vid_findmode(xres, yres, bpp)) == -1) { + fprintf(stderr, "failed to find video mode: %dx%d %dbpp\n", xres, yres, bpp); + return 1; + } + if(!(vmem = vid_setmode(mode))) { + fprintf(stderr, "failed to set video mode %04x\n", mode); + return 1; + } + vm = vid_modeinfo(mode); + + switch(vm->bpp) { + case 8: + test8bpp(); + break; + + default: + break; + } + + for(;;) { + while(kbhit()) { + if(getch() == 27) { + goto end; + } + } + } + +end: + vid_setmode(3); + vid_cleanup(); + return 0; +} + +static float fmin(float a, float b) +{ + return a < b ? a : b; +} + +#define PI 3.14159265 +#define TWO_PI (PI * 2.0f) + +void test8bpp(void) +{ + int i, j; + unsigned char *fb = vmem; + struct vid_color cmap[256]; + + for(i=0; i<256; i++) { + float x = (float)i / (256.0f / TWO_PI); + cmap[i].r = (int)fmin(0.0f, sin(x) * 255.0f); + cmap[i].g = (int)fmin(0.0f, sin(x - PI) * 255.0f); + cmap[i].b = (int)fmin(0.0f, cos(x - TWO_PI) * 255.0f); + } + vid_setpal(0, 256, cmap); + + vid_vsync(); + + for(i=0; iheight; i++) { + for(j=0; jwidth; j++) { + int xor = i^j; + *fb++ = xor; + } + } +} diff --git a/sizeint.h b/sizeint.h new file mode 100644 index 0000000..e1f6569 --- /dev/null +++ b/sizeint.h @@ -0,0 +1,35 @@ +#ifndef SIZEINT_H_ +#define SIZEINT_H_ + +/* for C99 or selected toolchain versions we can use stdint.h */ +#if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199900) || \ + (defined(_MSC_VER) && _MSC_VER >= 1600) || \ + (defined(__WATCOMC__) && __WATCOMC__ >= 1200) +#include + +#elif defined(__DOS__) && defined(__WATCOMC__) && __WATCOMC__ < 1200 +typedef signed char int8_t; +typedef unsigned char uint8_t; +typedef short int16_t; +typedef unsigned short uint16_t; +typedef long int32_t; +typedef unsigned long uint32_t; +typedef long intptr_t; +typedef unsigned long uintptr_t; + +#elif defined(_MSC_VER) && (_MSC_VER < 1600) +typedef signed __int8 int8_t; +typedef unsigned __int8 uint8_t; +typedef __int16 int16_t; +typedef unsigned __int16 uint16_t; +typedef __int32 int32_t; +typedef unsigned __int32 uint32_t; +typedef long intptr_t; +typedef unsigned long uintptr_t; + +#else +#include +#endif + + +#endif /* SIZEINT_H_ */ diff --git a/vbe.h b/vbe.h new file mode 100644 index 0000000..42417af --- /dev/null +++ b/vbe.h @@ -0,0 +1,241 @@ +#ifndef VBE_H_ +#define VBE_H_ + +#include +#include "sizeint.h" + +#pragma pack (push, 1) +struct vbe_info { + char sig[4]; + uint16_t ver; + char *oem_name; + uint32_t caps; + uint32_t modelist_addr; + uint16_t vmem_blk; /* video memory size in 64k blocks */ + uint16_t oem_ver; + char *vendor; + char *product; + char *revstr; + uint16_t accel_ver; + uint16_t *accel_modes; + char reserved[216]; + char oem_data[256]; +}; + +struct vbe_mode_info { + uint16_t attr; + uint8_t wina_attr, winb_attr; + uint16_t win_gran, win_size; + uint16_t wina_seg, winb_seg; + uint32_t win_func; + uint16_t scanline_bytes; + + /* VBE 1.2 and above */ + uint16_t xres, yres; + uint8_t xcharsz, ycharsz; + uint8_t num_planes; + uint8_t bpp; + uint8_t num_banks; + uint8_t mem_model; + uint8_t bank_size; /* bank size in KB */ + uint8_t num_img_pages; + uint8_t reserved1; + + /* direct color fields */ + uint8_t rsize, rpos; + uint8_t gsize, gpos; + uint8_t bsize, bpos; + uint8_t xsize, xpos; + uint8_t cmode_info; /* direct color mode attributes */ + + /* VBE 2.0 and above */ + uint32_t fb_addr; /* physical address of the linear framebuffer */ + uint32_t os_addr; /* phys. address of off-screen memory */ + uint16_t os_size; /* size in KB of off-screen memory */ + + /* VBE 3.0 and above */ + uint16_t lfb_scanline_bytes; + uint8_t banked_num_img_pages; + uint8_t lfb_num_img_pages; + uint8_t lfb_rsize, lfb_rpos; + uint8_t lfb_gsize, lfb_gpos; + uint8_t lfb_bsize, lfb_bpos; + uint8_t lfb_xsize, lfb_xpos; + uint32_t max_pixel_clock; + + char reserved2[190]; +}; + +struct vbe_crtc_info { + uint16_t htotal, hsync_start, hsync_end; + uint16_t vtotal, vsync_start, vsync_end; + uint8_t flags; + uint32_t pixel_clock; + uint16_t rate_centihz; /* refresh rate in 1/100 hz (pck / (htotal * vtotal)) */ + char reserved[40]; +}; +#pragma pack (pop) + +/* returned by vbe_scanline_info() */ +struct vbe_scanline_info { + int size; + int num_pixels; + int max_scanlines; +}; + +enum { + VBE_8BIT_DAC = 0x01, + VBE_NON_VGA = 0x02, + VBE_DAC_BLANK = 0x04, + VBE_STEREO = 0x08, /* ? */ + VBE_ACCEL = 0x08, + VBE_STEREO_VESA = 0x10, /* ? */ + VBE_MUSTLOCK = 0x10, + VBE_HWCURSOR = 0x20, + VBE_HWCLIP = 0x40, + VBE_TRANSP_BLT = 0x80 +}; + +#define VBE_VER_MAJOR(v) (((v) >> 8) & 0xff) +#define VBE_VER_MINOR(v) ((v) & 0xff) + +/* VBE mode attribute flags (vbe_mode_info.attr) */ +enum { + VBE_ATTR_AVAIL = 0x0001, + VBE_ATTR_OPTINFO = 0x0002, + VBE_ATTR_TTY = 0x0004, + VBE_ATTR_COLOR = 0x0008, + VBE_ATTR_GFX = 0x0010, + /* VBE 2.0 */ + VBE_ATTR_NOTVGA = 0x0020, + VBE_ATTR_BANKED = 0x0040, + VBE_ATTR_LFB = 0x0080, + VBE_ATTR_DBLSCAN = 0x0100, + /* VBE 3.0 */ + VBE_ATTR_ILACE = 0x0200, /* ! */ + VBE_ATTR_TRIPLEBUF = 0x0400, + VBE_ATTR_STEREO = 0x0800, + VBE_ATTR_STEREO_2FB = 0x1000, + /* VBE/AF */ + VBE_ATTR_MUSTLOCK = 0x0200 /* ! */ +}; + +/* VBE memory model type (vbe_mode_info.mem_model) */ +enum { + VBE_TYPE_TEXT, + VBE_TYPE_CGA, + VBE_TYPE_HERCULES, + VBE_TYPE_PLANAR, + VBE_TYPE_PACKED, + VBE_TYPE_UNCHAIN, + VBE_TYPE_DIRECT, + VBE_TYPE_YUV +}; + +/* VBE window attribute (vbe_mode_info.win(a|b)_attr) */ +enum { + VBE_WIN_AVAIL = 0x01, + VBE_WIN_RD = 0x02, + VBE_WIN_WR = 0x04 +}; + +/* mode number flags */ +enum { + VBE_MODE_RATE = 0x0800, /* VBE 3.0+ user-specified refresh rate */ + VBE_MODE_ACCEL = 0x2000, /* VBE/AF */ + VBE_MODE_LFB = 0x4000, /* VBE 2.0+ */ + VBE_MODE_PRESERVE = 0x8000 +}; + +/* standard mode numbers */ +enum { + VBE_640X400_8BPP = 0x100, + VBE_640X480_8BPP = 0x101, + VBE_800X600_4BPP = 0x102, + VBE_800X600_8BPP = 0x103, + VBE_1024X768_4BPP = 0x104, + VBE_1024X768_8BPP = 0x105, + VBE_1280X1024_4BPP = 0x106, + VBE_1280X1024_8BPP = 0x107, + VBE_80X60_TEXT = 0x108, + VBE_132X25_TEXT = 0x109, + VBE_132X43_TEXT = 0x10a, + VBE_132X50_TEXT = 0x10b, + VBE_132X60_TEXT = 0x10c, + /* VBE 1.2 */ + VBE_320X200_15BPP = 0x10d, + VBE_320X200_16BPP = 0x10e, + VBE_320X200_24BPP = 0x10f, + VBE_640X480_15BPP = 0x110, + VBE_640X480_16BPP = 0x111, + VBE_640X480_24BPP = 0x112, + VBE_800X600_15BPP = 0x113, + VBE_800X600_16BPP = 0x114, + VBE_800X600_24BPP = 0x115, + VBE_1024X768_15BPP = 0x116, + VBE_1024X768_16BPP = 0x117, + VBE_1024X768_24BPP = 0x118, + VBE_1280X1024_15BPP = 0x119, + VBE_1280X1024_16BPP = 0x11a, + VBE_1280X1024_24BPP = 0x11b, + /* VBE 2.0 */ + VBE_1600X1200_8BPP = 0x120, + VBE_1600X1200_15BPP = 0x121, + VBE_1600X1200_16BPP = 0x122, + + VBE_VMEM_MODE = 0x81ff +}; + +/* VBE CRTC flags (vbe_crtc_info.flags) */ +enum { + VBE_CRTC_DBLSCAN = 0x01, + VBE_CRTC_ILACE = 0x02, + VBE_CRTC_HSYNC_NEG = 0x04, + VBE_CRTC_VSYNC_NEG = 0x08 +}; + +enum { + VBE_STATE_CTRLHW = 0x01, + VBE_STATE_BIOS = 0x02, + VBE_STATE_DAC = 0x04, + VBE_STATE_REGS = 0x08, + + VBE_STATE_ALL = 0xffff +}; + +enum { + VBE_SWAP_NOW, + VBE_SWAP_VBLANK, + VBE_SWAP_ASYNC /* schedule swap and return (triple-buffering) */ +}; + +int vbe_info(struct vbe_info *info); +int vbe_num_modes(struct vbe_info *info); +int vbe_mode_info(int mode, struct vbe_mode_info *minf); + +void vbe_print_info(FILE *fp, struct vbe_info *info); +void vbe_print_mode_info(FILE *fp, struct vbe_mode_info *minf); + +int vbe_setmode(uint16_t mode); +int vbe_setmode_crtc(uint16_t mode, struct vbe_crtc_info *crtc); +int vbe_getmode(void); + +int vbe_state_size(unsigned int flags); +int vbe_save(void *stbuf, int sz, unsigned int flags); +int vbe_restore(void *stbuf, int sz, unsigned int flags); + +int vbe_setwin(int wid, int pos); +int vbe_getwin(int wid); + +/* returns the actual length in pixels, which might not be what was requested */ +int vbe_setscanlen(int len_pix); +int vbe_getscanlen(void); +int vbe_getpitch(void); +int vbe_scanline_info(struct vbe_scanline_info *sinf); + +int vbe_setdisp(int x, int y, int when); +int vbe_swap(uint32_t voffs, int when); +int vbe_swap_pending(void); /* 0: not pending (done) or error, 1: pending swap */ +/* TODO add stereo swap */ + +#endif /* VBE_H_ */ diff --git a/vga.h b/vga.h new file mode 100644 index 0000000..c15fe17 --- /dev/null +++ b/vga.h @@ -0,0 +1,93 @@ +#ifndef VGA_H_ +#define VGA_H_ + +/* ---- VGA registers ---- */ +#define VGA_AC_PORT 0x3c0 +#define VGA_AC_RD_PORT 0x3c1 +#define VGA_SC_ADDR_PORT 0x3c4 +#define VGA_SC_DATA_PORT 0x3c5 +#define VGA_DAC_STATUS_PORT 0x3c7 +#define VGA_DAC_RADDR_PORT 0x3c7 +#define VGA_DAC_WADDR_PORT 0x3c8 +#define VGA_DAC_DATA_PORT 0x3c9 +#define VGA_GC_ADDR_PORT 0x3ce +#define VGA_GC_DATA_PORT 0x3cf +#define VGA_CRTC_PORT 0x3d4 +#define VGA_CRTC_ADDR_PORT 0x3d4 +#define VGA_CRTC_DATA_PORT 0x3d5 +#define VGA_STAT0_PORT 0x3c2 +#define VGA_STAT1_PORT 0x3da +#define VGA_MISC_PORT 0x3c2 +#define VGA_MISC_RD_PORT 0x3cc + +/* attribute controller registers */ +#define VGA_AC_EN 0x20 +#define VGA_AC_MODE_REG 0x10 + +/* sequence controller registers */ +#define VGA_SC_RESET_REG 0x00 +#define VGA_SC_CLOCK_REG 0x01 +#define VGA_SC_MAPMASK_REG 0x02 +#define VGA_SC_MEMMODE_REG 0x04 + +/* graphics controller registers */ +#define VGA_GC_SR_REG 0x00 +#define VGA_GC_SREN_REG 0x01 +#define VGA_GC_ROT_REG 0x03 +#define VGA_GC_MODE_REG 0x05 +#define VGA_GC_MASK_REG 0x08 + +/* attribute controller mode register (10h) bits */ +#define VGA_AC_MODE_GFX 0x01 +#define VGA_AC_MODE_MONO 0x02 +#define VGA_AC_MODE_LGE 0x04 +#define VGA_AC_MODE_BLINK 0x08 +#define VGA_AC_MODE_PIXPAN 0x20 +#define VGA_AC_MODE_8BIT 0x40 + +/* misc register bits */ +#define VGA_MISC_COLOR 0x01 +#define VGA_MISC_CPUEN 0x02 +#define VGA_MISC_CLK25 0 +#define VGA_MISC_CLK28 0x04 +#define VGA_MISC_PG1 0x20 +#define VGA_MISC_400 0 +#define VGA_MISC_350 0x40 +#define VGA_MISC_480 0xc0 + + +/* CRTC registers */ +#define CRTC_HTOTAL_REG 0x00 +#define CRTC_HEND_REG 0x01 +#define CRTC_HBLSTART_REG 0x02 +#define CRTC_HBLEND_REG 0x03 +#define CRTC_HRETSTART_REG 0x04 +#define CRTC_HRETEND_REG 0x05 +#define CRTC_VTOTAL_REG 0x06 +#define CRTC_OVF_REG 0x07 +#define CRTC_PRESET_REG 0x08 +#define CRTC_MAXSCAN_REG 0x09 +#define CRTC_CURSTART_REG 0x0a +#define CRTC_CUREND_REG 0x0b +#define CRTC_STARTH_REG 0x0c +#define CRTC_STARTL_REG 0x0d +#define CRTC_CURH_REG 0x0e +#define CRTC_CURL_REG 0x0f +#define CRTC_VRETSTART_REG 0x10 +#define CRTC_VRETEND_REG 0x11 +#define CRTC_VEND_REG 0x12 +#define CRTC_OFFSET_REG 0x13 +#define CRTC_UL_REG 0x14 +#define CRTC_VBLSTART_REG 0x15 +#define CRTC_VBLEND_REG 0x16 +#define CRTC_MODE_REG 0x17 +#define CRTC_LCMP_REG 0x18 + +/* CRTC register bits */ +#define CRTC_VRETEND_PR 0x80 + +void vga_vsync(void); +void vga_setpal(int idx, int count, const struct vid_color *col); +void vga_getpal(int idx, int count, struct vid_color *col); + +#endif /* VGA_H_ */ diff --git a/vidsys.c b/vidsys.c new file mode 100644 index 0000000..43913c8 --- /dev/null +++ b/vidsys.c @@ -0,0 +1,179 @@ +#include +#include +#include +#include "vidsys.h" +#include "drv.h" +#include "cdpmi.h" + +struct vid_driver *vid_drvlist[MAX_DRV]; +int vid_numdrv; + +static struct vid_modeinfo **modes, *cur_mode; +static int num_modes, max_modes; + +static void *vmem; +static int vmem_size; + +int vid_init(void) +{ + int i, j; + + vid_numdrv = 0; + free(modes); + modes = 0; + cur_mode = 0; + num_modes = max_modes = 0; + + vmem = 0; + vmem_size = 0; + + if(dpmi_init() == -1) { + return -1; + } + + vid_register_vga(); + vid_register_vbe(); + vid_register_s3(); + + for(i=0; iops->init(); + + for(j=0; jnum_modes; j++) { + if(num_modes >= max_modes) { + int newsz = max_modes ? max_modes * 2 : 8; + void *tmp = realloc(modes, newsz * sizeof *modes); + if(!tmp) { + fprintf(stderr, "failed to allocate modes list\n"); + return -1; + } + modes = tmp; + max_modes = newsz; + } + + modes[num_modes++] = drv->modes + j; + } + } + + printf("found %d modes:\n", num_modes); + for(i=0; idrv->name, modes[i]->modeno, + modes[i]->width, modes[i]->height, modes[i]->bpp); + } + + return 0; +} + +void vid_cleanup(void) +{ + int i; + + if(cur_mode && cur_mode->modeno != 3) { + vid_setmode(3); + } + + if(vmem >= (void*)0x100000) { + dpmi_munmap(vmem); + } + + for(i=0; iops->cleanup(); + } + + free(modes); + dpmi_cleanup(); +} + + +int vid_curmode(void) +{ + if(cur_mode) { + return cur_mode->modeno; + } + return -1; +} + +void *vid_setmode(int mode) +{ + int i; + struct vid_driver *drv; + + for(i=0; imodeno == mode) { + drv = modes[i]->drv; + if(drv->ops->setmode(mode) == 0) { + cur_mode = modes[i]; + + if(vmem >= (void*)0x100000) { + assert(vmem_size); + dpmi_munmap(vmem); + } + + if(modes[i]->vmem_addr < 0x100000) { + vmem = (void*)modes[i]->vmem_addr; + vmem_size = 0; + } else { + vmem = dpmi_mmap(modes[i]->vmem_addr, modes[i]->vmem_size); + vmem_size = modes[i]->vmem_size; + } + return vmem; + } + } + } + return 0; +} + +#define EQUIV_BPP(a, b) \ + ((a) == (b) || ((a) == 16 && (b) == 15) || ((a) == 15 && (b) == 16) || \ + ((a) == 24 && (b) == 32) || ((a) == 32 && (b) == 24)) + +int vid_findmode(int xsz, int ysz, int bpp) +{ + int i; + + for(i=0; iwidth == xsz && modes[i]->height == ysz && modes[i]->bpp == bpp) { + return modes[i]->modeno; + } + } + + /* try fuzzy bpp matching */ + for(i=0; iwidth == xsz && modes[i]->height == ysz && + EQUIV_BPP(modes[i]->bpp, bpp)) { + return modes[i]->modeno; + } + } + + return -1; +} + + +struct vid_modeinfo *vid_modeinfo(int mode) +{ + int i; + + for(i=0; imodeno == mode) { + return modes[i]; + } + } + return 0; +} + +void vid_vsync(void) +{ + vga_vsync(); +} + +void vid_setpal(int idx, int count, const struct vid_color *col) +{ + cur_mode->ops.setpal(idx, count, col); +} + +void vid_getpal(int idx, int count, struct vid_color *col) +{ + cur_mode->ops.getpal(idx, count, col); +} diff --git a/vidsys.h b/vidsys.h new file mode 100644 index 0000000..f2e308c --- /dev/null +++ b/vidsys.h @@ -0,0 +1,69 @@ +#ifndef VIDSYS_VIDEO_H_ +#define VIDSYS_VIDEO_H_ + +#include +#include "sizeint.h" + +struct vid_drvops; + +struct vid_color { + int r, g, b; +}; + +struct vid_gfxops { + void (*pack)(uint32_t *pix, int r, int g, int b); + void (*unpack)(uint32_t pix, int *r, int *g, int *b); + void (*setpal)(int idx, int count, const struct vid_color *col); + void (*getpal)(int idx, int count, struct vid_color *col); + void (*vsync)(void); + + void (*clear)(uint32_t color); + void (*blitfb)(void *fb, int pitch); + void (*flip)(int vsync); + + void (*fill)(int x, int y, int w, int h, uint32_t color); + void (*blit)(int x, int y, int w, int h, void *img, int pitch); + void (*line)(int x0, int y0, int x1, int y1, uint32_t color); + void (*hline)(int x, int y, int len, uint32_t color); + void (*vline)(int x, int y, int len, uint32_t color); +}; + +struct vid_driver { + const char *name; + int prio; + + struct vid_modeinfo *modes; + int num_modes; + + struct vid_drvops *ops; +}; + +struct vid_modeinfo { + int modeno; + int width, height, bpp, ncolors; + uint32_t rmask, gmask, bmask; + int rshift, gshift, bshift; + int pages; + int win_size, win_gran; + uint32_t vmem_addr; + size_t vmem_size; + + struct vid_driver *drv; + struct vid_gfxops ops; +}; + +int vid_init(void); +void vid_cleanup(void); + +int vid_curmode(void); +void *vid_setmode(int mode); +int vid_findmode(int xsz, int ysz, int bpp); +struct vid_modeinfo *vid_modeinfo(int mode); + +void vid_vsync(void); + +/* current mode functions */ +void vid_setpal(int idx, int count, const struct vid_color *col); +void vid_getpal(int idx, int count, struct vid_color *col); + +#endif /* VIDSYS_VIDEO_H_ */ -- 1.7.10.4