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/*
* Copyright © 2009 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
#include "brw_context.h"
#include "brw_state.h"
#include "brw_defines.h"
#include "brw_util.h"
#include "main/macros.h"
#include "intel_batchbuffer.h"
static uint32_t
get_attr_override(struct brw_context *brw, int attr)
{
uint32_t attr_override;
int attr_index = 0, i;
/* Find the source index (0 = first attribute after the 4D position)
* for this output attribute. attr is currently a VERT_RESULT_* but should
* be FRAG_ATTRIB_*.
*/
for (i = 0; i < attr; i++) {
if (brw->vs.prog_data->outputs_written & BITFIELD64_BIT(i))
attr_index++;
}
attr_override = attr_index;
return attr_index;
}
static void
upload_sf_state(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
GLcontext *ctx = &intel->ctx;
/* CACHE_NEW_VS_PROG */
uint32_t num_inputs = brw_count_bits(brw->vs.prog_data->outputs_written);
/* This should probably be FS inputs read */
uint32_t num_outputs = brw_count_bits(brw->vs.prog_data->outputs_written);
uint32_t dw1, dw2, dw3, dw4;
int i;
/* _NEW_BUFFER */
GLboolean render_to_fbo = brw->intel.ctx.DrawBuffer->Name != 0;
int attr = 0;
dw1 =
num_outputs << GEN6_SF_NUM_OUTPUTS_SHIFT |
(num_inputs + 1) / 2 << GEN6_SF_URB_ENTRY_READ_LENGTH_SHIFT |
3 << GEN6_SF_URB_ENTRY_READ_OFFSET_SHIFT;
dw2 = GEN6_SF_VIEWPORT_TRANSFORM_ENABLE |
GEN6_SF_STATISTICS_ENABLE;
dw3 = 0;
dw4 = 0;
/* _NEW_POLYGON */
if ((ctx->Polygon.FrontFace == GL_CCW) ^ render_to_fbo)
dw2 |= GEN6_SF_WINDING_CCW;
/* _NEW_SCISSOR */
if (ctx->Scissor.Enabled)
dw3 |= GEN6_SF_SCISSOR_ENABLE;
/* _NEW_POLYGON */
if (ctx->Polygon.CullFlag) {
switch (ctx->Polygon.CullFaceMode) {
case GL_FRONT:
dw3 |= GEN6_SF_CULL_FRONT;
break;
case GL_BACK:
dw3 |= GEN6_SF_CULL_BACK;
break;
case GL_FRONT_AND_BACK:
dw3 |= GEN6_SF_CULL_BOTH;
break;
default:
assert(0);
break;
}
} else {
dw3 |= GEN6_SF_CULL_NONE;
}
/* _NEW_LINE */
dw3 |= U_FIXED(CLAMP(ctx->Line.Width, 0.0, 7.99), 7) <<
GEN6_SF_LINE_WIDTH_SHIFT;
if (ctx->Line.SmoothFlag) {
dw3 |= GEN6_SF_LINE_AA_ENABLE;
dw3 |= GEN6_SF_LINE_AA_MODE_TRUE;
dw3 |= GEN6_SF_LINE_END_CAP_WIDTH_1_0;
}
/* _NEW_POINT */
if (ctx->Point._Attenuated)
dw4 |= GEN6_SF_USE_STATE_POINT_WIDTH;
dw4 |= U_FIXED(CLAMP(ctx->Point.Size, 0.125, 225.875), 3) <<
GEN6_SF_POINT_WIDTH_SHIFT;
if (render_to_fbo)
dw1 |= GEN6_SF_POINT_SPRITE_LOWERLEFT;
/* _NEW_LIGHT */
if (ctx->Light.ProvokingVertex != GL_FIRST_VERTEX_CONVENTION) {
dw4 |=
(2 << GEN6_SF_TRI_PROVOKE_SHIFT) |
(2 << GEN6_SF_TRIFAN_PROVOKE_SHIFT) |
(1 << GEN6_SF_LINE_PROVOKE_SHIFT);
} else {
dw4 |=
(1 << GEN6_SF_TRIFAN_PROVOKE_SHIFT);
}
BEGIN_BATCH(20);
OUT_BATCH(CMD_3D_SF_STATE << 16 | (20 - 2));
OUT_BATCH(dw1);
OUT_BATCH(dw2);
OUT_BATCH(dw3);
OUT_BATCH(dw4);
OUT_BATCH_F(ctx->Polygon.OffsetUnits * 2); /* constant. copied from gen4 */
OUT_BATCH_F(ctx->Polygon.OffsetFactor); /* scale */
OUT_BATCH_F(0.0); /* XXX: global depth offset clamp */
for (i = 0; i < 8; i++) {
uint32_t attr_overrides = 0;
/* These should be generating FS inputs read instead of VS
* outputs written
*/
for (; attr < 64; attr++) {
if (brw->vs.prog_data->outputs_written & BITFIELD64_BIT(attr)) {
attr_overrides |= get_attr_override(brw, attr);
attr++;
break;
}
}
for (; attr < 64; attr++) {
if (brw->vs.prog_data->outputs_written & BITFIELD64_BIT(attr)) {
attr_overrides |= get_attr_override(brw, attr) << 16;
attr++;
break;
}
}
OUT_BATCH(attr_overrides);
}
OUT_BATCH(0); /* point sprite texcoord bitmask */
OUT_BATCH(0); /* constant interp bitmask */
OUT_BATCH(0); /* wrapshortest enables 0-7 */
OUT_BATCH(0); /* wrapshortest enables 8-15 */
ADVANCE_BATCH();
intel_batchbuffer_emit_mi_flush(intel->batch);
}
const struct brw_tracked_state gen6_sf_state = {
.dirty = {
.mesa = (_NEW_LIGHT |
_NEW_POLYGON |
_NEW_LINE |
_NEW_SCISSOR |
_NEW_BUFFERS),
.brw = BRW_NEW_CONTEXT,
.cache = CACHE_NEW_VS_PROG
},
.emit = upload_sf_state,
};
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