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| − | This page describes the [[GPU_Commands|GPU commands]] used for OpenGL arrays.
| + | Merged into [[GPU/Programming_Guide]]. |
| − | | |
| − | ==== Command Sets ====
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| − | | |
| − | ===== glDrawElements() =====
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| − | {| class="wikitable" border="1"
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| − | ! Command Index
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| − | ! CommandID
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| − | ! Parameter
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| − | ! Description
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| − | |-
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| − | | 0
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| − | | 0x00020229
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| − | | u32, val<<8.
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| − | | Unknown, val is 0 or 1.
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| − | |-
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| − | | 1-2
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| − | | 0x00020253
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| − | | Same as CmdID 0x00020229.
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| − | | Unknown
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| − | |-
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| − | | 3
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| − | | 0x0002025E
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| − | | u32, val<<8.
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| − | | This sets the GL rendering mode.
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| − | |-
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| − | | 4
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| − | | 0x0004025E
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 5
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| − | | 0x000F025F
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| − | | Value 1
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| − | | ?
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| − | |-
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| − | | 6
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| − | | 0x00010253
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 7
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| − | | 0x000F0227
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| − | | u32
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| − | | This specifies the indices data-type, and the indices array address.
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| − | |-
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| − | | 8
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| − | | 0x000F0228
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| − | | u32
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| − | | This specifies the number of elements in the array to use for rendering.
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| − | |-
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| − | | 9
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| − | | 0x00010245
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 10
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| − | | 0x000F022F
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| − | | Value 1
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| − | | ?
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| − | |-
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| − | | 11
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| − | | 0x00010245
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| − | | Value 1
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| − | | ?
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| − | |-
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| − | | 12
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| − | | 0x000F0231
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| − | | Value 1
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| − | | ?
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| − | |-
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| − | | 13
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| − | | 0x000F0111
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| − | | Value 1
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| − | | ?
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| − | |-
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| − | | 14
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| − | | 0x00020229
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 15
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| − | | 0x00020253
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 16
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| − | | 0x0002025E
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| − | | Value 0
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| − | | ?
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| − | |-
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| − | | 17
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| − | | 0x000C02BA
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| − | | Value 0x7FFF0000
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| − | | ?
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| − | |}
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| − | | |
| − | ===== CmdID 0x826F0200 =====
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| − | {| class="wikitable" border="1"
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| − | ! Command Index
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| − | ! CommandID
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| − | ! Parameter
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| − | ! Description
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| − | |-
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| − | | 0
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| − | | 0x826F0200
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| − | |
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| − | | This sets the addresses for the GL arrays.
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| − | |-
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| − | | 1
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| − | | 0x801F02BB
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| − | |
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| − | | ?
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| − | |-
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| − | | 2
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| − | | 0x803F0232
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| − | |
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| − | | Unknown, this command is used multiple times for specifying each parameter-buffer entry.
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| − | |}
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| − | | |
| − | === GL mode values for CmdID 0x0002025E ===
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| − | {| class="wikitable" border="1"
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| − | ! Value
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| − | ! Description
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| − | |-
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| − | | 0
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| − | | ?
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| − | |-
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| − | | 1
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| − | | GL_TRIANGLE_STRIP
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| − | |-
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| − | | 2
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| − | | GL_TRIANGLE_FAN
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| − | |-
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| − | | 3
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| − | | GL_TRIANGLES
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| − | |-
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| − | | 4
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| − | | Unknown, this seems to have the same effect as value 0.
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| − | |}
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| − | | |
| − | === Parameter value format for CmdID 0x000F0227 ===
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| − | {| class="wikitable" border="1"
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| − | ! Bit
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| − | ! Description
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| − | |-
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| − | | 30-0
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| − | | Indices array address, relative to VRAM physical address 0x18000000. Thus, when this relative address is 0x08XXXXXX, the array is located in FCRAM.
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| − | |-
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| − | | 31
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| − | | 0 = indices data-type GL_UNSIGNED_BYTE, 1 = GL_UNSIGNED_SHORT.
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| − | |}
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| − | | |
| − | === Parameter structure for CmdID 0x826F0200 ===
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| − | {| class="wikitable" border="1"
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| − | ! Index Word
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| − | ! Description
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| − | |-
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| − | | 0x0
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| − | | Base physical address >> 3, normally located in VRAM.
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| − | |-
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| − | | 0x1
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| − | | Every 4 bits is used for specifying the array data-type and size for each entry.
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| − | |-
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| − | | 0x2
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| − | | Value is: <nowiki>(0xF0000000 + (val<<28)) | (((0xFF<<totalentries) & 0xFF)<<16)</nowiki>, where val is the total 4-bit value entries for the CmdID 0x801F02BB parameter buffer.(Normally val is 8)
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| − | |-
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| − | | 0x3-0x26
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| − | | 12 entries, each entry is 3 words.
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| − | |}
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| − | | |
| − | These parameters and the entries' parameters are set by gl*Pointer().
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| − | | |
| − | ==== Entry structure ====
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| − | {| class="wikitable" border="1"
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| − | ! Index Word
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| − | ! Description
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| − | |-
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| − | | 0
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| − | | Physical address, relative to the base address.
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| − | |-
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| − | | 1
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| − | | Entry index
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| − | |-
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| − | | 2
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| − | | Value is: <nowiki>0x10000000 | (arraytype<<16).</nowiki>
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| − | |}
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| − | | |
| − | When the entry is unused, the entry data is all-zero.
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| − | | |
| − | ===== Entry array types =====
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| − | {| class="wikitable" border="1"
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| − | ! Type
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| − | ! Description
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| − | |-
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| − | | 0x2
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| − | | ?
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| − | |-
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| − | | 0x3
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| − | | Normals array
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| − | |-
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| − | | 0x4
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| − | | Texture coordinates array
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| − | |-
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| − | | 0xC
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| − | | Vertex array
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| − | |-
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| − | | 0x10
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| − | | Color array
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| − | |}
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| − | | |
| − | ===== Array data-type/size values =====
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| − | {| class="wikitable" border="1"
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| − | ! Value
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| − | ! GL type
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| − | |-
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| − | | 0x0 + ((size-1)*4)
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| − | | GL_BYTE
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| − | |-
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| − | | 0x1 + ((size-1)*4)
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| − | | GL_UNSIGNED_BYTE
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| − | |-
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| − | | 0x2 + ((size-1)*4)
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| − | | GL_UNSIGNED_SHORT/GL_SHORT
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| − | |-
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| − | | 0x3 + ((size-1)*4)
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| − | | GL_FLOAT
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| − | |}
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| − | | |
| − | Size is 1-4. Using GL_FLOAT with a texture coordinates array causes the GPU to hang?
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| − | | |
| − | === Parameter structure for CmdID 0x801F02BB ===
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| − | {| class="wikitable" border="1"
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| − | ! Index Word
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| − | ! Description
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| − | |-
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| − | | 0-1
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| − | | u64, every 4-bits is a value from some array.
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| − | |}
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| − | | |
| − | === Parameter structure for CmdID 0x803F0232 ===
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| − | {| class="wikitable" border="1"
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| − | ! Index Word
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| − | ! Description
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| − | |-
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| − | | 0
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| − | | Entry index + total CmdID 0x826F0200 parameter-buffer entries.
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| − | |-
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| − | | 1
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| − | | Unknown, usually value 0x3F000000 / 0.5f.(u32 read/writes are used for this field, not float read/writes however)
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| − | |-
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| − | | 2
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| − | | Unknown, usually value 0.
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| − | |-
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| − | | 3
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| − | | Unknown, usually value 0.
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| − | |}
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| − | | |
| − | Each parameter buffer for CmdID 0x803F0232 is an entry loaded from an array.
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