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tgsi: add prolog() method to tgsi_transform_context

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Called when the user can insert new decls, instructions.
This could be used in a few places in the 'draw' module.

Reviewed-by: Charmaine Lee <charmainel@vmware.com>
This commit is contained in:
Brian Paul 2014-03-14 14:49:33 -06:00
parent 2826212dc7
commit b16bb3f50f
2 changed files with 13 additions and 0 deletions
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7
src/gallium/auxiliary/tgsi/tgsi_transform.c
View file

@ -109,6 +109,7 @@ tgsi_transform_shader(const struct tgsi_token *tokens_in,
struct tgsi_transform_context *ctx)
{
uint procType;
boolean first_instruction = TRUE;
/* input shader */
struct tgsi_parse_context parse;
@ -166,10 +167,16 @@ tgsi_transform_shader(const struct tgsi_token *tokens_in,
struct tgsi_full_instruction *fullinst
= &parse.FullToken.FullInstruction;
if (first_instruction && ctx->prolog) {
ctx->prolog(ctx);
}
if (ctx->transform_instruction)
ctx->transform_instruction(ctx, fullinst);
else
ctx->emit_instruction(ctx, fullinst);
first_instruction = FALSE;
}
break;

6
src/gallium/auxiliary/tgsi/tgsi_transform.h
View file

@ -56,6 +56,12 @@ struct tgsi_transform_context
void (*transform_property)(struct tgsi_transform_context *ctx,
struct tgsi_full_property *prop);
/**
* Called after last declaration, before first instruction. This is
* where the user might insert new declarations and/or instructions.
*/
void (*prolog)(struct tgsi_transform_context *ctx);
/**
* Called at end of input program to allow caller to append extra
* instructions. Return number of tokens emitted.