From 98ee6739d97b5592a7dad0b453c78e180a51ad50 Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Tue, 7 Dec 2010 21:33:53 +0800
Subject: vbo: Fix GLES2 glVertexAttrib.

Attribute 0 has no special meaning in GLES2.  Add VertexAttrib4f_nopos
for that purpose and make _es_VertexAttrib* call the new function.

Rename _vbo_* to _es_* to avoid confusion.  These functions are only
used by GLES, and now some of them (_es_VertexAttrib*) even behave
differently than vbo_VertexAttrib*.
---
 src/mesa/vbo/vbo_exec_api.c | 56 ++++++++++++++++++++++++++++-----------------
 1 file changed, 35 insertions(+), 21 deletions(-)

(limited to 'src/mesa/vbo/vbo_exec_api.c')

diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index 29cd4254d5..fb981ccc3b 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -972,35 +972,35 @@ static void reset_attrfv( struct vbo_exec_context *exec )
       
 
 void GLAPIENTRY
-_vbo_Color4f(GLfloat r, GLfloat g, GLfloat b, GLfloat a)
+_es_Color4f(GLfloat r, GLfloat g, GLfloat b, GLfloat a)
 {
    vbo_Color4f(r, g, b, a);
 }
 
 
 void GLAPIENTRY
-_vbo_Normal3f(GLfloat x, GLfloat y, GLfloat z)
+_es_Normal3f(GLfloat x, GLfloat y, GLfloat z)
 {
    vbo_Normal3f(x, y, z);
 }
 
 
 void GLAPIENTRY
-_vbo_MultiTexCoord4f(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q)
+_es_MultiTexCoord4f(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q)
 {
    vbo_MultiTexCoord4f(target, s, t, r, q);
 }
 
 
 void GLAPIENTRY
-_vbo_Materialfv(GLenum face, GLenum pname, const GLfloat *params)
+_es_Materialfv(GLenum face, GLenum pname, const GLfloat *params)
 {
    vbo_Materialfv(face, pname, params);
 }
 
 
 void GLAPIENTRY
-_vbo_Materialf(GLenum face, GLenum pname, GLfloat param)
+_es_Materialf(GLenum face, GLenum pname, GLfloat param)
 {
    GLfloat p[4];
    p[0] = param;
@@ -1009,57 +1009,71 @@ _vbo_Materialf(GLenum face, GLenum pname, GLfloat param)
 }
 
 
+/**
+ * A special version of glVertexAttrib4f that does not treat index 0 as
+ * VBO_ATTRIB_POS.
+ */
+static void
+VertexAttrib4f_nopos(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   if (index < MAX_VERTEX_GENERIC_ATTRIBS)
+      ATTR(VBO_ATTRIB_GENERIC0 + index, 4, x, y, z, w);
+   else
+      ERROR();
+}
+
 void GLAPIENTRY
-_vbo_VertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
+_es_VertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
 {
-   vbo_VertexAttrib4fARB(index, x, y, z, w);
+   VertexAttrib4f_nopos(index, x, y, z, w);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib1f(GLuint indx, GLfloat x)
+_es_VertexAttrib1f(GLuint indx, GLfloat x)
 {
-   vbo_VertexAttrib1fARB(indx, x);
+   VertexAttrib4f_nopos(indx, x, 0.0f, 0.0f, 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib1fv(GLuint indx, const GLfloat* values)
+_es_VertexAttrib1fv(GLuint indx, const GLfloat* values)
 {
-   vbo_VertexAttrib1fvARB(indx, values);
+   VertexAttrib4f_nopos(indx, values[0], 0.0f, 0.0f, 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib2f(GLuint indx, GLfloat x, GLfloat y)
+_es_VertexAttrib2f(GLuint indx, GLfloat x, GLfloat y)
 {
-   vbo_VertexAttrib2fARB(indx, x, y);
+   VertexAttrib4f_nopos(indx, x, y, 0.0f, 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib2fv(GLuint indx, const GLfloat* values)
+_es_VertexAttrib2fv(GLuint indx, const GLfloat* values)
 {
-   vbo_VertexAttrib2fvARB(indx, values);
+   VertexAttrib4f_nopos(indx, values[0], values[1], 0.0f, 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib3f(GLuint indx, GLfloat x, GLfloat y, GLfloat z)
+_es_VertexAttrib3f(GLuint indx, GLfloat x, GLfloat y, GLfloat z)
 {
-   vbo_VertexAttrib3fARB(indx, x, y, z);
+   VertexAttrib4f_nopos(indx, x, y, z, 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib3fv(GLuint indx, const GLfloat* values)
+_es_VertexAttrib3fv(GLuint indx, const GLfloat* values)
 {
-   vbo_VertexAttrib3fvARB(indx, values);
+   VertexAttrib4f_nopos(indx, values[0], values[1], values[2], 1.0f);
 }
 
 
 void GLAPIENTRY
-_vbo_VertexAttrib4fv(GLuint indx, const GLfloat* values)
+_es_VertexAttrib4fv(GLuint indx, const GLfloat* values)
 {
-   vbo_VertexAttrib4fvARB(indx, values);
+   VertexAttrib4f_nopos(indx, values[0], values[1], values[2], values[3]);
 }
-- 
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