Fix pow <small> and a very stypid bug with dummy srcs(0 equals to tmp0.x)</small...

[mesa.git] / src / mesa / main / bufferobj.c

diff --git a/src/mesa/main/bufferobj.c b/src/mesa/main/bufferobj.c
index 185d841f81219d2a7731ee6ea0df83c0de7a5006..03aec367c438942073a4a8b62ea595061c507f0d 100644 (file)
--- a/src/mesa/main/bufferobj.c
+++ b/src/mesa/main/bufferobj.c
@@ -433,6 +433,7 @@ _mesa_validate_pbo_access(GLuint dimensions,
                           GLenum format, GLenum type, const GLvoid *ptr)
 {
    GLvoid *start, *end;
+   const GLubyte *sizeAddr; /* buffer size, cast to a pointer */
 
    ASSERT(pack->BufferObj->Name != 0);
 
@@ -449,11 +450,13 @@ _mesa_validate_pbo_access(GLuint dimensions,
                               format, type, depth-1, height-1, width);
 
 
-   if ((const GLubyte *) start > (const GLubyte *) pack->BufferObj->Size) {
+   sizeAddr = ((const GLubyte *) 0) + pack->BufferObj->Size;
+
+   if ((const GLubyte *) start > sizeAddr) {
       /* This will catch negative values / wrap-around */
       return GL_FALSE;
    }
-   if ((const GLubyte *) end > (const GLubyte *) pack->BufferObj->Size) {
+   if ((const GLubyte *) end > sizeAddr) {
       /* Image read goes beyond end of buffer */
       return GL_FALSE;
    }
@@ -900,7 +903,7 @@ _mesa_GetBufferParameterivARB(GLenum target, GLenum pname, GLint *params)
 
    switch (pname) {
       case GL_BUFFER_SIZE_ARB:
-         *params = bufObj->Size;
+         *params = (GLint) bufObj->Size;
          break;
       case GL_BUFFER_USAGE_ARB:
          *params = bufObj->Usage;