#include <nitro/gx/gx.h>
void GX_SetOBJVRamModeChar(GXOBJVRamModeChar mode);
mode | Mapping mode |
None.
This function sets OBJ-VRAM capacity for a character OBJ, and sets mapping mode.
GX_OBJVRAMMODE_CHAR_2D |
Selects 2D mapping mode. |
GX_OBJVRAMMODE_CHAR_1D_32K |
Sets 1D mapping mode with the first character name boundary of 32 bytes. The maximum capacity of OBJ-VRAM is 32 Kilobytes. |
GX_OBJVRAMMODE_CHAR_1D_64K |
Sets 1D mapping mode with the first character name boundary of 64 bytes. The maximum capacity of OBJ-VRAM is 64 Kilobytes. |
GX_OBJVRAMMODE_CHAR_1D_128K |
Sets 1D mapping mode with the first character name boundary of 128 bytes. The maximum capacity of OBJ-VRAM is 128 Kilobytes. |
GX_OBJVRAMMODE_CHAR_1D_256K |
Sets 1D mapping mode with the first character name boundary of 256 bytes. The maximum capacity of OBJ-VRAM is 256 Kilobytes. |
Mapping mode specifies the first character name boundary and is not related to the bank capacity of VRAM that is actually allocated.
The following are GXOBJVRamModeChar
matrix format type definitions.
typedef enum
{
GX_OBJVRAMMODE_CHAR_2D = (0 << REG_GX_DISPCNT_OBJMAP_SHIFT) | (0 << REG_GX_DISPCNT_EXOBJ_SHIFT),
GX_OBJVRAMMODE_CHAR_1D_32K = (1 << REG_GX_DISPCNT_OBJMAP_SHIFT) | (0 << REG_GX_DISPCNT_EXOBJ_SHIFT),
GX_OBJVRAMMODE_CHAR_1D_64K = (1 << REG_GX_DISPCNT_OBJMAP_SHIFT) | (1 << REG_GX_DISPCNT_EXOBJ_SHIFT),
GX_OBJVRAMMODE_CHAR_1D_128K = (1 << REG_GX_DISPCNT_OBJMAP_SHIFT) | (2 << REG_GX_DISPCNT_EXOBJ_SHIFT),
GX_OBJVRAMMODE_CHAR_1D_256K = (1 << REG_GX_DISPCNT_OBJMAP_SHIFT) | (3 << REG_GX_DISPCNT_EXOBJ_SHIFT)
}
GXOBJVRamModeChar;
GX_SetOBJVRamModeBmp, GX_GetOBJVRamModeChar
08/03/2004
02/09/2004
01/19/2004 Initial version