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fix potential NULL dereference (bug 11879)

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This commit is contained in:
Brian 2007-08-07 21:56:39 +01:00
parent 510ff27eda
commit d8e4ff9079
1 changed files with 5 additions and 4 deletions
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9
src/mesa/drivers/dri/unichrome/via_context.c
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@ -733,14 +733,15 @@ void viaXMesaWindowMoved(struct via_context *vmesa)
{
__DRIdrawablePrivate *const drawable = vmesa->driDrawable;
__DRIdrawablePrivate *const readable = vmesa->driReadable;
struct via_renderbuffer *const draw_buffer =
(struct via_renderbuffer *) drawable->driverPrivate;
struct via_renderbuffer *const read_buffer =
(struct via_renderbuffer *) readable->driverPrivate;
struct via_renderbuffer * draw_buffer;
struct via_renderbuffer * read_buffer;
GLuint bytePerPixel = vmesa->viaScreen->bitsPerPixel >> 3;
if (!drawable)
return;
draw_buffer = (struct via_renderbuffer *) drawable->driverPrivate;
read_buffer = (struct via_renderbuffer *) readable->driverPrivate;
switch (vmesa->glCtx->DrawBuffer->_ColorDrawBufferMask[0]) {
case BUFFER_BIT_BACK_LEFT: