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softpipe: add null ptr check in softpipe_map_constant_buffers()

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Fixes segfault regression in progs/glsl/identity.c
This commit is contained in:
Brian Paul 2009-02-09 10:12:11 -07:00
parent 87e44d9003
commit 3c15e02783
1 changed files with 8 additions and 2 deletions
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10
src/gallium/drivers/softpipe/sp_draw_arrays.c
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@ -47,16 +47,22 @@ static void
softpipe_map_constant_buffers(struct softpipe_context *sp)
{
struct pipe_winsys *ws = sp->pipe.winsys;
uint i;
uint i, size;
for (i = 0; i < PIPE_SHADER_TYPES; i++) {
if (sp->constants[i].buffer && sp->constants[i].buffer->size)
sp->mapped_constants[i] = ws->buffer_map(ws, sp->constants[i].buffer,
PIPE_BUFFER_USAGE_CPU_READ);
}
if (sp->constants[PIPE_SHADER_VERTEX].buffer)
size = sp->constants[PIPE_SHADER_VERTEX].buffer->size;
else
size = 0;
draw_set_mapped_constant_buffer(sp->draw,
sp->mapped_constants[PIPE_SHADER_VERTEX],
sp->constants[PIPE_SHADER_VERTEX].buffer->size);
size);
}
static void