diff options
| author | Brian Paul <brian.paul@tungstengraphics.com> | 2008-08-04 11:02:22 -0600 |
|---|---|---|
| committer | Brian Paul <brian.paul@tungstengraphics.com> | 2008-08-04 17:14:48 -0600 |
| commit | 901c4db2ed7b98d2026fb9f0374a48eca9a8019f (patch) | |
| tree | 7d8c46d843379e16b1fec8f6cb0e376c36255db3 /src/mesa/shader/slang/slang_simplify.c | |
| parent | 26ec3780b85765a681f3f365137ee2ecd63d37fc (diff) | |
mesa: glsl: handle user-defined const vars in expression simplification
Diffstat (limited to 'src/mesa/shader/slang/slang_simplify.c')
| -rw-r--r-- | src/mesa/shader/slang/slang_simplify.c | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/src/mesa/shader/slang/slang_simplify.c b/src/mesa/shader/slang/slang_simplify.c index c4bf0175be..bc651962a1 100644 --- a/src/mesa/shader/slang/slang_simplify.c +++ b/src/mesa/shader/slang/slang_simplify.c @@ -94,6 +94,15 @@ _slang_lookup_constant(const char *name) } +static slang_operation_type +literal_type(slang_operation_type t1, slang_operation_type t2) +{ + if (t1 == SLANG_OPER_LITERAL_FLOAT || t2 == SLANG_OPER_LITERAL_FLOAT) + return SLANG_OPER_LITERAL_FLOAT; + else + return SLANG_OPER_LITERAL_INT; +} + /** * Recursively traverse an AST tree, applying simplifications wherever @@ -114,6 +123,7 @@ _slang_simplify(slang_operation *oper, if (oper->type == SLANG_OPER_IDENTIFIER) { /* see if it's a named constant */ GLint value = _slang_lookup_constant((char *) oper->a_id); + /*printf("value[%s] = %d\n", (char*) oper->a_id, value);*/ if (value >= 0) { oper->literal[0] = oper->literal[1] = @@ -122,6 +132,28 @@ _slang_simplify(slang_operation *oper, oper->type = SLANG_OPER_LITERAL_INT; return; } + /* look for user-defined constant */ + { + slang_variable *var; + var = _slang_locate_variable(oper->locals, oper->a_id, GL_TRUE); + if (var) { + if (var->type.qualifier == SLANG_QUAL_CONST && + var->initializer && + (var->initializer->type == SLANG_OPER_LITERAL_INT || + var->initializer->type == SLANG_OPER_LITERAL_FLOAT)) { + oper->literal[0] = var->initializer->literal[0]; + oper->literal[1] = var->initializer->literal[1]; + oper->literal[2] = var->initializer->literal[2]; + oper->literal[3] = var->initializer->literal[3]; + oper->type = var->initializer->type; + /* + printf("value[%s] = %f\n", + (char*) oper->a_id, oper->literal[0]); + */ + return; + } + } + } } /* first, simplify children */ @@ -146,8 +178,9 @@ _slang_simplify(slang_operation *oper, = oper->children[0].literal[i] + oper->children[1].literal[i]; } oper->literal_size = oper->children[0].literal_size; - slang_operation_destruct(oper); - oper->type = SLANG_OPER_LITERAL_FLOAT; + oper->type = literal_type(oper->children[0].type, + oper->children[1].type); + slang_operation_destruct(oper); /* frees unused children */ return; case SLANG_OPER_SUBTRACT: for (i = 0; i < 4; i++) { @@ -155,8 +188,9 @@ _slang_simplify(slang_operation *oper, = oper->children[0].literal[i] - oper->children[1].literal[i]; } oper->literal_size = oper->children[0].literal_size; + oper->type = literal_type(oper->children[0].type, + oper->children[1].type); slang_operation_destruct(oper); - oper->type = SLANG_OPER_LITERAL_FLOAT; return; case SLANG_OPER_MULTIPLY: for (i = 0; i < 4; i++) { @@ -164,8 +198,9 @@ _slang_simplify(slang_operation *oper, = oper->children[0].literal[i] * oper->children[1].literal[i]; } oper->literal_size = oper->children[0].literal_size; + oper->type = literal_type(oper->children[0].type, + oper->children[1].type); slang_operation_destruct(oper); - oper->type = SLANG_OPER_LITERAL_FLOAT; return; case SLANG_OPER_DIVIDE: for (i = 0; i < 4; i++) { @@ -173,8 +208,9 @@ _slang_simplify(slang_operation *oper, = oper->children[0].literal[i] / oper->children[1].literal[i]; } oper->literal_size = oper->children[0].literal_size; + oper->type = literal_type(oper->children[0].type, + oper->children[1].type); slang_operation_destruct(oper); - oper->type = SLANG_OPER_LITERAL_FLOAT; return; default: ; /* nothing */ |