GXS_SetOBJVRamModeBmp

C Specification

#include <nitro/gx/gx.h>
void GXS_SetOBJVRamModeBmp(GXOBJVRamModeBmp mode);

Arguments

mode Mapping mode

Return Values

None.

Description

This function sets OBJ-VRAM capacity for sub 2D Engine bitmap OBJs and sets mapping mode.

GX_OBJVRAMMODE_BMP_2D_W128 Selects 2D mapping mode with 128 horizontal pixels.
GX_OBJVRAMMODE_BMP_2D_W256 Selects 2D mapping mode with 256 horizontal pixels.
GX_OBJVRAMMODE_BMP_1D_128K Sets 1D mapping mode with OBJ-VRAM capacity of 128 Kilobytes. The first character name boundary is 128 bytes.
GX_OBJVRAMMODE_BMP_1D_256K This setting is prohibited with a sub-2D engine.

The following shows GXOBJVRamModeBmp format type definitions:

typedef enum
{
GX_OBJVRAMMODE_BMP_2D_W128_32K = (0 << REG_GX_DISPCNT_OBJMAP_SHIFT + 1) | (0 << REG_GX_DISPCNT_EXOBJ_SHIFT + 2),
GX_OBJVRAMMODE_BMP_2D_W256_32K = (1 << REG_GX_DISPCNT_OBJMAP_SHIFT + 1) | (0 << REG_GX_DISPCNT_EXOBJ_SHIFT + 2),
GX_OBJVRAMMODE_BMP_1D_128K = (2 << REG_GX_DISPCNT_OBJMAP_SHIFT + 1) | (0 << REG_GX_DISPCNT_EXOBJ_SHIFT + 2),
GX_OBJVRAMMODE_BMP_1D_256K = (2 << REG_GX_DISPCNT_OBJMAP_SHIFT + 1) | (1 << REG_GX_DISPCNT_EXOBJ_SHIFT + 2)
}
GXOBJVRamModeBmp;

See Also

GXS_SetOBJVRamModeChar, GXS_GetOBJVRamModeBmp

Revision History

02/09/2004 Initial version.