[Mesa-dev] [PATCH] mesa: fix error handling for glMaterial*

[Yuanhan Liu]

Trigger GL_INVALID_ENUM error if the face paramter is not a valid value.

Trigger GL_INVALID_VALUE error if the GL_SHININESS value is out side
[0, ctx->Constant.MaxShiniess].

v2: fix the max shininess value.

v3: suggested by Brian, move the face check into glMaterialfv function
    to reduce code duplicate. Also, refactor the error message.

Signed-off-by: Yuanhan Liu <yuanhan.liu at linux.intel.com>
---
 src/mesa/vbo/vbo_attrib_tmp.h |   13 ++++++++++++-
 1 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/src/mesa/vbo/vbo_attrib_tmp.h b/src/mesa/vbo/vbo_attrib_tmp.h
index 65717eb..e102383 100644
--- a/src/mesa/vbo/vbo_attrib_tmp.h
+++ b/src/mesa/vbo/vbo_attrib_tmp.h
@@ -809,6 +809,12 @@ TAG(Materialfv)(GLenum face, GLenum pname,
                  const GLfloat * params)
 {
    GET_CURRENT_CONTEXT(ctx);
+
+   if (face != GL_FRONT && face != GL_BACK && face != GL_FRONT_AND_BACK) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glMaterial(invalid face)");
+      return;
+   }
+
    switch (pname) {
    case GL_EMISSION:
       MAT(VBO_ATTRIB_MAT_FRONT_EMISSION, 4, face, params);
@@ -823,7 +829,12 @@ TAG(Materialfv)(GLenum face, GLenum pname,
       MAT(VBO_ATTRIB_MAT_FRONT_SPECULAR, 4, face, params);
       break;
    case GL_SHININESS:
-      MAT(VBO_ATTRIB_MAT_FRONT_SHININESS, 1, face, params);
+      if (*params < 0 || *params > ctx->Const.MaxShininess)
+         _mesa_error(ctx, GL_INVALID_VALUE,
+                     "glMaterial(invalid shininess: %f out range [0, %f])",
+		     *params, ctx->Const.MaxShininess);
+      else
+         MAT(VBO_ATTRIB_MAT_FRONT_SHININESS, 1, face, params);
       break;
    case GL_COLOR_INDEXES:
       MAT(VBO_ATTRIB_MAT_FRONT_INDEXES, 3, face, params);
-- 
1.7.4.4