Difference between revisions of "GPU/GL Arrays"
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Revision as of 22:17, 1 March 2013
This page describes the GPU commands used for OpenGL arrays.
Command Sets
glDrawElements()
| Command Index | CommandID | Parameter | Description |
|---|---|---|---|
| 0 | 0x00020229 | u32, val<<8. | Unknown, val is 0 or 1. |
| 1-2 | 0x00020253 | Same as CmdID 0x00020229. | Unknown |
| 3 | 0x0002025E | u32, val<<8. | This sets the GL rendering mode. |
| 4 | 0x0004025E | Value 0 | ? |
| 5 | 0x000F025F | Value 1 | ? |
| 6 | 0x00010253 | Value 0 | ? |
| 7 | 0x000F0227 | u32 | This specifies the indices data-type, and the indices array address. |
| 8 | 0x000F0228 | u32 | This specifies the number of elements in the array to use for rendering. |
| 9 | 0x00010245 | Value 0 | ? |
| 10 | 0x000F022F | Value 1 | ? |
| 11 | 0x00010245 | Value 1 | ? |
| 12 | 0x000F0231 | Value 1 | ? |
| 13 | 0x000F0111 | Value 1 | ? |
| 14 | 0x00020229 | Value 0 | ? |
| 15 | 0x00020253 | Value 0 | ? |
| 16 | 0x0002025E | Value 0 | ? |
| 17 | 0x000C02BA | Value 0x7FFF0000 | ? |
CmdID 0x826F0200
| Command Index | CommandID | Parameter | Description |
|---|---|---|---|
| 0 | 0x826F0200 | This sets the addresses for the GL arrays. | |
| 1 | 0x801F02BB | ? | |
| 2 | 0x803F0232 | Unknown, this command is used multiple times for specifying each parameter-buffer entry. |
GL mode values for CmdID 0x0002025E
| Value | Description |
|---|---|
| 0 | ? |
| 1 | GL_TRIANGLE_STRIP |
| 2 | GL_TRIANGLE_FAN |
| 3 | GL_TRIANGLES |
| 4 | Unknown, this seems to have the same effect as value 0. |
Parameter value format for CmdID 0x000F0227
| Bit | Description |
|---|---|
| 30-0 | Indices array address, relative to VRAM physical address 0x18000000. Thus, when this relative address is 0x08XXXXXX, the array is located in FCRAM. |
| 31 | 0 = indices data-type GL_UNSIGNED_BYTE, 1 = GL_UNSIGNED_SHORT. |
Parameter structure for CmdID 0x826F0200
| Index Word | Description |
|---|---|
| 0x0 | Base physical address >> 3, normally located in VRAM. |
| 0x1 | Every 4 bits is used for specifying the array data-type and size for each entry. |
| 0x2 | Value is: (0xF0000000 + (val<<28)) | (((0xFF<<totalentries) & 0xFF)<<16). |
| 0x3-0x26 | 12 entries, each entry is 3 words. |
These parameters and the entries' parameters are set by gl*Pointer().
Entry structure
| Index Word | Description |
|---|---|
| 0 | Physical address, relative to the base address. |
| 1 | Entry index |
| 2 | Value is: 0x10000000 | (arraytype<<16). |
When the entry is unused, the entry data is all-zero.
Entry array types
| Type | Description |
|---|---|
| 0x2 | ? |
| 0x3 | Normals array |
| 0x4 | Texture coordinates array |
| 0xC | Vertex array |
| 0x10 | Color array |
Array data-type/size values
| Value | GL type |
|---|---|
| 0x0 + ((size-1)*4) | GL_BYTE |
| 0x1 + ((size-1)*4) | GL_UNSIGNED_BYTE |
| 0x2 + ((size-1)*4) | GL_UNSIGNED_SHORT/GL_SHORT |
| 0x3 + ((size-1)*4) | GL_FLOAT |
Size is 1-4.
Parameter structure for CmdID 0x801F02BB
| Index Word | Description |
|---|---|
| 0-1 | u64, every 4-bits is a value from some array. |
Parameter structure for CmdID 0x803F0232
| Index Word | Description |
|---|---|
| 0 | Entry index + total CmdID 0x826F0200 parameter-buffer entries. |
| 1 | ? |
| 2 | ? |
| 3 | ? |
Each parameter buffer for CmdID 0x803F0232 is an entry loaded from an array.