From b191382c60bdcfeb7f424b23aa6ab63de81e2f08 Mon Sep 17 00:00:00 2001
From: Bryan Cain <bryancain3@gmail.com>
Date: Mon, 13 Jun 2011 18:12:56 -0500
Subject: mesa, glsl_to_tgsi: add native support for integers in shaders

Disabled by default on all drivers.  To enable it, change ctx->GLSLVersion to 130
in st_extensions.c.  Currently, softpipe is the only driver with integer support.
---
 src/mesa/main/uniforms.c | 38 +++++++++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 13 deletions(-)

(limited to 'src/mesa/main/uniforms.c')

diff --git a/src/mesa/main/uniforms.c b/src/mesa/main/uniforms.c
index 07d46c6404f..ce4863faf78 100644
--- a/src/mesa/main/uniforms.c
+++ b/src/mesa/main/uniforms.c
@@ -454,8 +454,9 @@ get_uniform(struct gl_context *ctx, GLuint program, GLint location,
             for (i = 0; i < rows; i++) {
                const int base = paramPos + offset + i;
                for (j = 0; j < cols; j++ ) {
-                  params[k++] = (GLint)
-                     prog->Parameters->ParameterValues[base][j].f;
+                  params[k++] = ctx->Const.GLSLVersion <= 120 ? 
+                     (GLint) prog->Parameters->ParameterValues[base][j].f : 
+                     prog->Parameters->ParameterValues[base][j].i;
                }
             }
          }
@@ -467,8 +468,9 @@ get_uniform(struct gl_context *ctx, GLuint program, GLint location,
             for (i = 0; i < rows; i++) {
                const int base = paramPos + offset + i;
                for (j = 0; j < cols; j++ ) {
-                  params[k++] = (GLuint)
-                     prog->Parameters->ParameterValues[base][j].f;
+                  params[k++] = ctx->Const.GLSLVersion <= 120 ? 
+                     (GLuint) prog->Parameters->ParameterValues[base][j].f : 
+                     prog->Parameters->ParameterValues[base][j].u;
                }
             }
          }
@@ -735,42 +737,52 @@ set_program_uniform(struct gl_context *ctx, struct gl_program *program,
 
       /* loop over number of array elements */
       for (k = 0; k < count; k++) {
-         GLfloat *uniformVal;
+         gl_constant_value *uniformVal;
 
          if (offset + k >= slots) {
             /* Extra array data is ignored */
             break;
          }
 
-         /* uniformVal (the destination) is always float[4] */
+         /* uniformVal (the destination) is always gl_constant_value[4] */
          uniformVal = program->Parameters->ParameterValues[index + offset + k];
 
          if (basicType == GL_INT) {
-            /* convert user's ints to floats */
             const GLint *iValues = ((const GLint *) values) + k * elems;
             for (i = 0; i < elems; i++) {
-               uniformVal[i] = (GLfloat) iValues[i];
+               if (ctx->Const.GLSLVersion <= 120)
+                  uniformVal[i].f = (GLfloat) iValues[i];
+               else
+                  uniformVal[i].i = iValues[i];
             }
          }
          else if (basicType == GL_UNSIGNED_INT) {
-            /* convert user's uints to floats */
             const GLuint *iValues = ((const GLuint *) values) + k * elems;
             for (i = 0; i < elems; i++) {
-               uniformVal[i] = (GLfloat) iValues[i];
+               if (ctx->Const.GLSLVersion <= 120)
+                  uniformVal[i].f = (GLfloat)(GLuint) iValues[i];
+               else
+                  uniformVal[i].u = iValues[i];
             }
          }
          else {
             const GLfloat *fValues = ((const GLfloat *) values) + k * elems;
             assert(basicType == GL_FLOAT);
             for (i = 0; i < elems; i++) {
-               uniformVal[i] = fValues[i];
+               uniformVal[i].f = fValues[i];
             }
          }
 
-         /* if the uniform is bool-valued, convert to 1.0 or 0.0 */
+         /* if the uniform is bool-valued, convert to 1 or 0 */
          if (isUniformBool) {
             for (i = 0; i < elems; i++) {
-               uniformVal[i] = uniformVal[i] ? 1.0f : 0.0f;
+               if (basicType == GL_FLOAT)
+                  uniformVal[i].b = uniformVal[i].f != 0.0f ? 1 : 0;
+               else
+                  uniformVal[i].b = uniformVal[i].u ? 1 : 0;
+               
+               if (ctx->Const.GLSLVersion <= 120)
+                  uniformVal[i].f = uniformVal[i].b ? 1.0f : 0.0f;
             }
          }
       }
-- 
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