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/*
* Copyright © 2011 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
/** \file gen6_sol.c
*
* Code to initialize the binding table entries used by transform feedback.
*/
#include "brw_context.h"
#include "intel_batchbuffer.h"
#include "brw_defines.h"
static void
gen6_update_sol_surfaces(struct brw_context *brw)
{
struct gl_context *ctx = &brw->intel.ctx;
/* _NEW_TRANSFORM_FEEDBACK */
struct gl_transform_feedback_object *xfb_obj =
ctx->TransformFeedback.CurrentObject;
/* BRW_NEW_VERTEX_PROGRAM */
const struct gl_shader_program *shaderprog =
ctx->Shader.CurrentVertexProgram;
const struct gl_transform_feedback_info *linked_xfb_info =
&shaderprog->LinkedTransformFeedback;
int i;
for (i = 0; i < BRW_MAX_SOL_BINDINGS; ++i) {
const int surf_index = SURF_INDEX_SOL_BINDING(i);
if (xfb_obj->Active && i < linked_xfb_info->NumOutputs) {
unsigned buffer = linked_xfb_info->Outputs[i].OutputBuffer;
unsigned buffer_offset =
xfb_obj->Offset[buffer] / 4 +
linked_xfb_info->Outputs[i].DstOffset;
brw_update_sol_surface(
brw, xfb_obj->Buffers[buffer], &brw->bind.surf_offset[surf_index],
linked_xfb_info->Outputs[i].NumComponents,
linked_xfb_info->BufferStride[buffer], buffer_offset);
} else {
brw->bind.surf_offset[surf_index] = 0;
}
}
}
const struct brw_tracked_state gen6_sol_surface = {
.dirty = {
.mesa = _NEW_TRANSFORM_FEEDBACK,
.brw = (BRW_NEW_BATCH |
BRW_NEW_VERTEX_PROGRAM),
.cache = 0
},
.emit = gen6_update_sol_surfaces,
};
void
brw_end_transform_feedback(struct gl_context *ctx,
struct gl_transform_feedback_object *obj)
{
/* After EndTransformFeedback, it's likely that the client program will try
* to draw using the contents of the transform feedback buffer as vertex
* input. In order for this to work, we need to flush the data through at
* least the GS stage of the pipeline, and flush out the render cache. For
* simplicity, just do a full flush.
*/
struct brw_context *brw = brw_context(ctx);
struct intel_context *intel = &brw->intel;
intel_batchbuffer_emit_mi_flush(intel);
}
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