Module level9 

The Aon9 part of a container compiled for a Direct3D 9 feature level (ps_4_0_level_9_1 and the like): the Shader Model 2 program the runtime runs on such hardware, and the tables that map the Shader Model 4 program’s constant buffers, samplers and resources onto Direct3D 9 registers.

The layout below was read from containers fxc 10.0.26100.4654 built for every combination the tables have (no constants, float/int/uint/bool constants from several buffers, loops over int constants, branches on bool constants, several texture and sampler pairs, vertex and pixel programs at levels 9_1 and 9_3), each checked against D3DDisassemble’s printing of the same tables. Words, from the start of the part:

• 0: the part’s size in bytes;
• 1: a Direct3D 9 version token, the program’s version at the feature level’s minimum (vs_2_0 where the program is vs_2_x);
• 2 and 3: the program’s size and its offset in the part, in bytes;
• 4 to 8: five tables, each a u16 count then a u16 byte offset: constant buffer ranges (12 bytes a row), int constants (8), bool constants (8), samplers (4), constants the runtime fills (4).

Structs

ConstantMapping

One range of a constant buffer copied into float constant registers.

Level9

The Aon9 part.

RuntimeConstant

A float constant register the runtime fills itself.

SamplerMapping

A Direct3D 9 sampler register and the Shader Model 4 sampler and resource it stands for.

ScalarMapping

One component of a constant buffer copied into an int (i#) or bool (b#) constant register.

Functions

level9

The Aon9 part: None for a container without one. Refuses a container parts refuses, a part whose stated size is not its own, and a program or table that runs past the part; errors name the part’s word.