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WIP: compile for DOS (32bit protected mode) with DJGPP
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /** @file src/video/video_dos.c IBM PC VGA video driver */ | ||
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| #include <dpmi.h> | ||
| #include <pc.h> | ||
| #include <sys/nearptr.h> | ||
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| #include "types.h" | ||
| #include "video.h" | ||
| #include "../gfx.h" | ||
| #include "../os/error.h" | ||
|
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| /* mouse : */ | ||
| static int s_mouse_x = SCREEN_WIDTH/2; | ||
| static int s_mouse_x_min = 0; | ||
| static int s_mouse_x_max = SCREEN_WIDTH-1; | ||
| static int s_mouse_y = SCREEN_HEIGHT/2; | ||
| static int s_mouse_y_min = 0; | ||
| static int s_mouse_y_max = SCREEN_HEIGHT-1; | ||
| static bool s_mouse_left_btn = false; | ||
| static bool s_mouse_right_btn = true; | ||
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| bool Video_Init(int screen_magnification, VideoScaleFilter filter) | ||
| { | ||
| __dpmi_regs r; | ||
| (void)screen_magnification; | ||
| (void)filter; | ||
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| /* enable access to 1st MB of memory */ | ||
| if (__djgpp_nearptr_enable() == 0) { | ||
| Error("__djgpp_nearptr_enable() failed, cannot access VGA memory.\n"); | ||
| return false; | ||
| } | ||
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| g_consoleActive = false; | ||
| r.x.ax = 0x13; /* MCGA 13h mode */ | ||
| __dpmi_int(0x10, &r); | ||
| return true; | ||
| } | ||
|
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| void Video_Uninit(void) | ||
| { | ||
| __dpmi_regs r; | ||
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| __djgpp_nearptr_disable(); | ||
| r.x.ax = 0x03; /* text mode */ | ||
| __dpmi_int(0x10, &r); | ||
| g_consoleActive = true; | ||
| return; | ||
| } | ||
|
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| void Video_Tick(void) | ||
| { | ||
| } | ||
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| void Video_SetPalette(void *palette, int from, int length) | ||
| { | ||
| uint8 *p = palette; | ||
|
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| outportb(0x3C8, from); | ||
| while(length > 0) { | ||
| outportb(0x3C9, *p++); | ||
| outportb(0x3C9, *p++); | ||
| outportb(0x3C9, *p++); | ||
| length--; | ||
| } | ||
| } | ||
|
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| void Video_Mouse_SetPosition(uint16 x, uint16 y) | ||
| { | ||
| s_mouse_x = x; | ||
| s_mouse_y = y; | ||
| } | ||
|
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| void Video_Mouse_SetRegion(uint16 minX, uint16 maxX, uint16 minY, uint16 maxY) | ||
| { | ||
| s_mouse_x_min = minX; | ||
| s_mouse_x_max = maxX; | ||
| s_mouse_y_min = minY; | ||
| s_mouse_y_max = maxY; | ||
| } | ||
|
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| void Video_SetOffset(uint16 offset) | ||
| { | ||
| /* set Start Address High/Low VGA registers */ | ||
| outportb(0x3D4, 0x0C); | ||
| outportb(0x3D5, offset >> 8); | ||
| outportb(0x3D4, 0x0D); | ||
| outportb(0x3D5, offset); | ||
| } | ||
|
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| void * Video_GetFrameBuffer(uint16 size) | ||
| { | ||
| (void)size; | ||
|
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| /* VGA frame buffer */ | ||
| return (void *)(0x000a0000 + __djgpp_conventional_base); | ||
| } |