Currently, that's the only path that supports reading data from these buffers.
Signed-off-by: Anuj Phogat <anuj.pho...@gmail.com>
---
src/mesa/drivers/dri/i965/intel_pixel_read.c | 22 ++++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/src/mesa/drivers/dri/i965/intel_pixel_read.c
b/src/mesa/drivers/dri/i965/intel_pixel_read.c
index 9ab5ed1..4d256df 100644
--- a/src/mesa/drivers/dri/i965/intel_pixel_read.c
+++ b/src/mesa/drivers/dri/i965/intel_pixel_read.c
@@ -221,15 +221,33 @@ intelReadPixels(struct gl_context * ctx,
struct brw_context *brw = brw_context(ctx);
bool dirty;
+ bool create_pbo = false;
+ uint32_t tr_mode = INTEL_MIPTREE_TRMODE_NONE;
DBG("%s\n", __FUNCTION__);
+ if (brw->gen >= 9) {
+ const struct gl_framebuffer *readFb = ctx->ReadBuffer;
+ const int att_index = readFb->_ColorReadBufferIndex;
+ const struct gl_renderbuffer_attachment *readAtt =
+ &readFb->Attachment[att_index];
+ struct gl_renderbuffer *rb = readAtt->Renderbuffer;
+ const struct intel_renderbuffer *irb = intel_renderbuffer(rb);
+ tr_mode = irb->mt->tr_mode;
+ create_pbo = irb->mt->tr_mode != INTEL_MIPTREE_TRMODE_NONE;
+ }
+
if (_mesa_meta_pbo_GetTexSubImage(ctx, 2, NULL, x, y, 0, width,
height, 1, format, type, pixels,
- false /*create_pbo*/,
- true /*for_readpixels*/, pack))
+ create_pbo, true /*for_readpixels*/,
+ pack))
return;
+ /* Currently there are no fallback paths to read data from surfaces with
+ * tr_mode != INTEL_MIPTREE_TRMODE_NONE.
+ */
+ assert(tr_mode == INTEL_MIPTREE_TRMODE_NONE);
+
if (_mesa_is_bufferobj(ctx->Pack.BufferObj))
perf_debug("%s: fallback to CPU mapping in PBO case\n", __FUNCTION__);
--
2.3.4
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