mesa: new functions for managing list/index of uniforms

src/mesa/shader/prog_uniform.c

@@ -0,0 +1,157 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file prog_uniform.c
+ * Shader uniform functions.
+ * \author Brian Paul
+ */
+
+#include "main/imports.h"
+#include "main/mtypes.h"
+#include "prog_uniform.h"
+
+
+struct gl_uniform_list *
+_mesa_new_uniform_list(void)
+{
+   return CALLOC_STRUCT(gl_uniform_list);
+}
+
+
+void
+_mesa_free_uniform_list(struct gl_uniform_list *list)
+{
+   GLuint i;
+   for (i = 0; i < list->NumUniforms; i++) {
+      _mesa_free((void *) list->Uniforms[i].Name);
+   }
+   _mesa_free(list->Uniforms);
+   _mesa_free(list);
+}
+
+
+GLboolean
+_mesa_append_uniform(struct gl_uniform_list *list,
+                     const char *name, GLenum target, GLuint progPos)
+{
+   const GLuint oldNum = list->NumUniforms;
+   GLint index;
+
+   assert(target == GL_VERTEX_PROGRAM_ARB ||
+          target == GL_FRAGMENT_PROGRAM_ARB);
+
+   index = _mesa_lookup_uniform(list, name);
+   if (index < 0) {
+      /* not found - append to list */
+
+      if (oldNum + 1 > list->Size) {
+         /* Need to grow the list array (alloc some extra) */
+         list->Size += 4;
+
+         /* realloc arrays */
+         list->Uniforms = (struct gl_uniform *)
+            _mesa_realloc(list->Uniforms,
+                          oldNum * sizeof(struct gl_uniform),
+                          list->Size * sizeof(struct gl_uniform));
+      }
+
+      if (!list->Uniforms) {
+         /* out of memory */
+         list->NumUniforms = 0;
+         list->Size = 0;
+         return GL_FALSE;
+      }
+
+      list->Uniforms[oldNum].Name = _mesa_strdup(name);
+      list->Uniforms[oldNum].VertPos = -1;
+      list->Uniforms[oldNum].FragPos = -1;
+      index = oldNum;
+      list->NumUniforms++;
+   }
+
+   /* update position for the vertex or fragment program */
+   if (target == GL_VERTEX_PROGRAM_ARB) {
+      if (list->Uniforms[index].VertPos != -1) {
+         /* this uniform is already in the list - that shouldn't happen */
+         return GL_FALSE;
+      }
+      list->Uniforms[index].VertPos = progPos;
+   }
+   else {
+      if (list->Uniforms[index].FragPos != -1) {
+         /* this uniform is already in the list - that shouldn't happen */
+         return GL_FALSE;
+      }
+      list->Uniforms[index].FragPos = progPos;
+   }
+
+   return GL_TRUE;
+}
+
+
+/**
+ * Return the location/index of the named uniform in the uniform list,
+ * or -1 if not found.
+ */
+GLint
+_mesa_lookup_uniform(const struct gl_uniform_list *list, const char *name)
+{
+   GLuint i;
+   for (i = 0; i < list->NumUniforms; i++) {
+      if (!_mesa_strcmp(list->Uniforms[i].Name, name)) {
+         return i;
+      }
+   }
+   return -1;
+}
+
+
+GLint
+_mesa_longest_uniform_name(const struct gl_uniform_list *list)
+{
+   GLint max = 0;
+   GLuint i;
+   for (i = 0; i < list->NumUniforms; i++) {
+      GLuint len = _mesa_strlen(list->Uniforms[i].Name);
+      if (len > max)
+         max = len;
+   }
+   return max;
+}
+
+
+void
+_mesa_print_uniforms(const struct gl_uniform_list *list)
+{
+   GLuint i;
+   printf("Uniform list %p:\n", (void *) list);
+   for (i = 0; i < list->NumUniforms; i++) {
+      printf("%d: %s %d %d\n",
+             i,
+             list->Uniforms[i].Name,
+             list->Uniforms[i].VertPos,
+             list->Uniforms[i].FragPos);
+   }
+}

src/mesa/shader/prog_uniform.h

@@ -0,0 +1,91 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  7.1
+ *
+ * Copyright (C) 1999-2008  Brian Paul   All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/**
+ * \file prog_uniform.c
+ * Shader uniform functions.
+ * \author Brian Paul
+ */
+
+#ifndef PROG_UNIFORM_H
+#define PROG_UNIFORM_H
+
+#include "main/mtypes.h"
+#include "prog_statevars.h"
+
+
+/**
+ * Shader program uniform variable.
+ * The glGetUniformLocation() and glUniform() commands will use this
+ * information.
+ * Note that a uniform such as "binormal" might be used in both the
+ * vertex shader and the fragment shader.  When glUniform() is called to
+ * set the uniform's value, it must be updated in both the vertex and
+ * fragment shaders.  The uniform may be in different locations in the
+ * two shaders so we keep track of that here.
+ */
+struct gl_uniform
+{
+   const char *Name;        /**< Null-terminated string */
+   GLint VertPos;
+   GLint FragPos;
+#if 0
+   GLenum DataType;         /**< GL_FLOAT, GL_FLOAT_VEC2, etc */
+   GLuint Size;             /**< Number of components (1..4) */
+#endif
+};
+
+
+/**
+ * List of gl_uniforms
+ */
+struct gl_uniform_list
+{
+   GLuint Size;                 /**< allocated size of Uniforms array */
+   GLuint NumUniforms;          /**< number of uniforms in the array */
+   struct gl_uniform *Uniforms; /**< Array [Size] */
+};
+
+
+extern struct gl_uniform_list *
+_mesa_new_uniform_list(void);
+
+extern void
+_mesa_free_uniform_list(struct gl_uniform_list *list);
+
+extern GLboolean
+_mesa_append_uniform(struct gl_uniform_list *list,
+                     const char *name, GLenum target, GLuint progPos);
+
+extern GLint
+_mesa_lookup_uniform(const struct gl_uniform_list *list, const char *name);
+
+extern GLint
+_mesa_longest_uniform_name(const struct gl_uniform_list *list);
+
+extern void
+_mesa_print_uniforms(const struct gl_uniform_list *list);
+
+
+#endif /* PROG_UNIFORM_H */