Mesa (master): mesa: In emit_texenv() type mismatch was forced with typecast

[Tapani Pälli]

Module: Mesa
Branch: master
Commit: fe5224b16a7a614fad07edee86cdcc8f47446f5e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=fe5224b16a7a614fad07edee86cdcc8f47446f5e

Author: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Date:   Mon Feb 24 09:42:17 2014 +0200

mesa: In emit_texenv() type mismatch was forced with typecast

Type mismatch caused random memory to be copied when casted
memory area was smaller than expected type.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

---

 src/mesa/main/ff_fragment_shader.cpp |   17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

diff --git a/src/mesa/main/ff_fragment_shader.cpp b/src/mesa/main/ff_fragment_shader.cpp
index 8c36097..2115837 100644
--- a/src/mesa/main/ff_fragment_shader.cpp
+++ b/src/mesa/main/ff_fragment_shader.cpp
@@ -877,14 +877,15 @@ emit_texenv(texenv_fragment_program *p, GLuint unit)
 	 shift = new(p->mem_ctx) ir_constant((float)(1 << rgb_shift));
       }
       else {
-	 float const_data[4] = {
-	    float(1 << rgb_shift),
-	    float(1 << rgb_shift),
-	    float(1 << rgb_shift),
-	    float(1 << alpha_shift)
-	 };
-	 shift = new(p->mem_ctx) ir_constant(glsl_type::vec4_type,
-					     (ir_constant_data *)const_data);
+         ir_constant_data const_data;
+
+         const_data.f[0] = float(1 << rgb_shift);
+         const_data.f[1] = float(1 << rgb_shift);
+         const_data.f[2] = float(1 << rgb_shift);
+         const_data.f[3] = float(1 << alpha_shift);
+
+         shift = new(p->mem_ctx) ir_constant(glsl_type::vec4_type,
+                                             &const_data);
       }
 
       return saturate(mul(deref, shift));