From 2c87030a00eb5b7034f14f6060093d4b264bc5c0 Mon Sep 17 00:00:00 2001
From: Ian Romanick <ian.d.romanick@intel.com>
Date: Wed, 25 Jul 2012 16:21:49 -0700
Subject: [PATCH] mesa/es: Validate glGetVertexAttribf pname in Mesa code
 rather than the ES wrapper

v2: Add proper core-profile and GLES3 filtering.

v3: Allow glGetVertexAttribfv(0, GL_CURRENT_VERTEX_ATTRIB_ARB, param) in
OpenGL 3.1, just like OpenGL ES 2.0.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
---
 src/mesa/main/APIspec.xml | 16 ----------------
 src/mesa/main/varray.c    | 15 ++++++++++++---
 2 files changed, 12 insertions(+), 19 deletions(-)

diff --git a/src/mesa/main/APIspec.xml b/src/mesa/main/APIspec.xml
index de7364091b9..6b20baa38df 100644
--- a/src/mesa/main/APIspec.xml
+++ b/src/mesa/main/APIspec.xml
@@ -1622,22 +1622,6 @@
 		<param name="pname" type="GLenum"/>
 		<vector name="params" type="GLtype *" size="dynamic"/>
 	</proto>
-
-	<desc name="pname">
-		<value name="GL_VERTEX_ATTRIB_ARRAY_ENABLED"/>
-		<value name="GL_VERTEX_ATTRIB_ARRAY_SIZE"/>
-		<value name="GL_VERTEX_ATTRIB_ARRAY_STRIDE"/>
-		<value name="GL_VERTEX_ATTRIB_ARRAY_TYPE"/>
-		<value name="GL_VERTEX_ATTRIB_ARRAY_NORMALIZED"/>
-		<value name="GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING"/>
-
-		<desc name="params" vector_size="1" convert="false"/>
-	</desc>
-
-	<desc name="pname">
-		<value name="GL_CURRENT_VERTEX_ATTRIB"/>
-		<desc name="params" vector_size="16?" convert="false"/>
-	</desc>
 </template>
 
 <template name="GetVertexAttribPointer" direction="get">
diff --git a/src/mesa/main/varray.c b/src/mesa/main/varray.c
index 8c3ddc524aa..8a123337154 100644
--- a/src/mesa/main/varray.c
+++ b/src/mesa/main/varray.c
@@ -590,12 +590,15 @@ get_vertex_array_attrib(struct gl_context *ctx, GLuint index, GLenum pname,
    case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING_ARB:
       return array->BufferObj->Name;
    case GL_VERTEX_ATTRIB_ARRAY_INTEGER:
-      if (ctx->Version >= 30 || ctx->Extensions.EXT_gpu_shader4) {
+      if ((_mesa_is_desktop_gl(ctx)
+           && (ctx->Version >= 30 || ctx->Extensions.EXT_gpu_shader4))
+          || _mesa_is_gles3(ctx)) {
          return array->Integer;
       }
       goto error;
    case GL_VERTEX_ATTRIB_ARRAY_DIVISOR_ARB:
-      if (ctx->Extensions.ARB_instanced_arrays) {
+      if ((_mesa_is_desktop_gl(ctx) && ctx->Extensions.ARB_instanced_arrays)
+          || _mesa_is_gles3(ctx)) {
          return array->InstanceDivisor;
       }
       goto error;
@@ -613,7 +616,13 @@ static const GLfloat *
 get_current_attrib(struct gl_context *ctx, GLuint index, const char *function)
 {
    if (index == 0) {
-      if (ctx->API != API_OPENGLES2) {
+      /* In OpenGL 3.1 attribute 0 becomes non-magic, just like in OpenGL ES
+       * 2.0.  Note that we cannot just check for API_OPENGL_CORE here because
+       * that will erroneously allow this usage in a 3.0 forward-compatible
+       * context too.
+       */
+      if ((ctx->API != API_OPENGL_CORE || ctx->Version < 31)
+          && ctx->API != API_OPENGLES2) {
 	 _mesa_error(ctx, GL_INVALID_OPERATION, "%s(index==0)", function);
 	 return NULL;
       }
-- 
2.30.2