This page describes the GPU commands used for textures.
Command set 0x809F0081
| Command Index | CommandID | Parameter | Description |
|---|---|---|---|
| 0 | 0x809F0081 | This is used to set the current texture info used for rendering. | |
| 1 | 0x000F008E | u32 color type | This sets the current texture color type. |
Textures are initially disabled when beginning rendering for each mesh, this command set also enables textures.
Texture info parameter structure for CmdID 0x809F0081
| Index Word | Description |
|---|---|
| 0 | ? |
| 1 | The low u16 is the texture image width, and the high u16 is the texture image height. |
| 2 | Texture parameters, initialized by glTexParameter(). |
| 3 | ? |
| 4 | Texture data physical address >> 3. This is normally located in VRAM. |
| 5-9 | ? |
Texture parameters
| Bit | Description | GL parameter name |
|---|---|---|
| 0 | Normally this is value 0. | |
| 1 | 0 = GL_NEAREST, 1 = GL_LINEAR. | GL_TEXTURE_MAG_FILTER |
| 2 | 1 = GL_LINEAR, GL_LINEAR_MIPMAP_NEAREST, or GL_LINEAR_MIPMAP_LINEAR. Value zero otherwise. | GL_TEXTURE_MIN_FILTER |
| 3 | Unused? | ? |
| 7-4 | 2 = texture color type 0xC, 0 otherwise.(Enable/disable texture data compression?) | |
| 11-8 | 0 = GL_CLAMP_TO_EDGE, 1=unknown, 2=GL_REPEAT, 3=unknown. | GL_TEXTURE_WRAP_S |
| 15-12 | Same values as GL_TEXTURE_WRAP_S. | GL_TEXTURE_WRAP_T |
| 24 | 1 = GL_NEAREST_MIPMAP_LINEAR, or GL_LINEAR_MIPMAP_LINEAR. Value zero otherwise. | GL_TEXTURE_MIN_FILTER |
| 27-25 | Unused? | |
| 30-28 | When some flag=1: value1=GL_TEXTURE_2D, value0 when the input parameter is not GL_TEXTURE_2D. When some flag=0: 0=GL_TEXTURE_2D, 1-4=unknown. | ? |
| 31 | Unused? | ? |
Texture color type parameter values for CmdID 0x000F008E
| Value | Description | GL Format | GL Data Type |
|---|---|---|---|
| 0x0 | RGBA8888 | GL_RGBA | GL_UNSIGNED_BYTE |
| 0x1 | BGR888 | GL_RGB | GL_UNSIGNED_BYTE |
| 0x2 | RGBA5551 | GL_RGBA | GL_UNSIGNED_SHORT_5_5_5_1 |
| 0x3 | BGR565 | GL_RGB | GL_UNSIGNED_SHORT_5_6_5 |
| 0x4 | RGBA4444 | GL_RGBA | GL_UNSIGNED_SHORT_4_4_4_4 |
| 0x5 | GL_LUMINANCE_ALPHA | GL_UNSIGNED_BYTE | |
| 0x6 | ? | ? | GL_UNSIGNED_BYTE |
| 0x7 | GL_LUMINANCE | GL_UNSIGNED_BYTE | |
| 0x8 | GL_ALPHA | GL_UNSIGNED_BYTE | |
| 0x9 | ? | GL_LUMINANCE_ALPHA | ? |
| 0xA | ? | GL_LUMINANCE | |
| 0xB | ? | GL_ALPHA | |
| 0xC | Compression related? | ? | |
| 0xD | ? | ? |