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intel: fix mapping of malloc'd renderbuffers

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This fixes accum buffer operations.  The accumulation buffer is the
only malloc-based renderbuffer for the intel drivers.

v2: apply x/y offset to returned pointer

NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Brian Paul
2012-01-07 15:05:35 -07:00
parent 9be6654c1f
commit 6dbdc03956
1 changed files with 15 additions and 0 deletions
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15
src/mesa/drivers/dri/intel/intel_fbo.c
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@@ -132,6 +132,15 @@ intel_map_renderbuffer(struct gl_context *ctx,
void *map;
int stride;
if (!irb && rb->Data) {
/* this is a malloc'd renderbuffer (accum buffer) */
GLint bpp = _mesa_get_format_bytes(rb->Format);
GLint rowStride = rb->RowStride * bpp;
*out_map = (GLubyte *) rb->Data + y * rowStride + x * bpp;
*out_stride = rowStride;
return;
}
/* We sometimes get called with this by our intel_span.c usage. */
if (!irb->mt) {
*out_map = NULL;
@@ -176,6 +185,12 @@ intel_unmap_renderbuffer(struct gl_context *ctx,
DBG("%s: rb %d (%s)\n", __FUNCTION__,
rb->Name, _mesa_get_format_name(rb->Format));
if (!irb && rb->Data) {
/* this is a malloc'd renderbuffer (accum buffer) */
/* nothing to do */
return;
}
intel_miptree_unmap(intel, irb->mt, irb->mt_level, irb->mt_layer);
}