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/*
* Copyright 2014 Advanced Micro Devices, Inc.
*
* 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.
*/
#include "si_pipe.h"
#include "sid.h"
#include "radeon/r600_cs.h"
/* For MSAA sample positions. */
#define FILL_SREG(s0x, s0y, s1x, s1y, s2x, s2y, s3x, s3y) \
(((s0x) & 0xf) | (((unsigned)(s0y) & 0xf) << 4) | \
(((unsigned)(s1x) & 0xf) << 8) | (((unsigned)(s1y) & 0xf) << 12) | \
(((unsigned)(s2x) & 0xf) << 16) | (((unsigned)(s2y) & 0xf) << 20) | \
(((unsigned)(s3x) & 0xf) << 24) | (((unsigned)(s3y) & 0xf) << 28))
/* 2xMSAA
* There are two locations (4, 4), (-4, -4). */
static const uint32_t sample_locs_2x[4] = {
FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
FILL_SREG(4, 4, -4, -4, 4, 4, -4, -4),
};
/* 4xMSAA
* There are 4 locations: (-2, -6), (6, -2), (-6, 2), (2, 6). */
static const uint32_t sample_locs_4x[4] = {
FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
FILL_SREG(-2, -6, 6, -2, -6, 2, 2, 6),
};
/* Cayman 8xMSAA */
static const uint32_t sample_locs_8x[] = {
FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
FILL_SREG( 1, -3, -1, 3, 5, 1, -3, -5),
FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
FILL_SREG(-5, 5, -7, -1, 3, 7, 7, -7),
};
/* Cayman 16xMSAA */
static const uint32_t sample_locs_16x[] = {
FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
FILL_SREG( 1, 1, -1, -3, -3, 2, 4, -1),
FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
FILL_SREG(-5, -2, 2, 5, 5, 3, 3, -5),
FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
FILL_SREG(-2, 6, 0, -7, -4, -6, -6, 4),
FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
FILL_SREG(-8, 0, 7, -4, 6, 7, -7, -8),
};
static void si_get_sample_position(struct pipe_context *ctx, unsigned sample_count,
unsigned sample_index, float *out_value)
{
int offset, index;
struct {
int idx:4;
} val;
switch (sample_count) {
case 1:
default:
out_value[0] = out_value[1] = 0.5;
break;
case 2:
offset = 4 * (sample_index * 2);
val.idx = (sample_locs_2x[0] >> offset) & 0xf;
out_value[0] = (float)(val.idx + 8) / 16.0f;
val.idx = (sample_locs_2x[0] >> (offset + 4)) & 0xf;
out_value[1] = (float)(val.idx + 8) / 16.0f;
break;
case 4:
offset = 4 * (sample_index * 2);
val.idx = (sample_locs_4x[0] >> offset) & 0xf;
out_value[0] = (float)(val.idx + 8) / 16.0f;
val.idx = (sample_locs_4x[0] >> (offset + 4)) & 0xf;
out_value[1] = (float)(val.idx + 8) / 16.0f;
break;
case 8:
offset = 4 * (sample_index % 4 * 2);
index = (sample_index / 4) * 4;
val.idx = (sample_locs_8x[index] >> offset) & 0xf;
out_value[0] = (float)(val.idx + 8) / 16.0f;
val.idx = (sample_locs_8x[index] >> (offset + 4)) & 0xf;
out_value[1] = (float)(val.idx + 8) / 16.0f;
break;
case 16:
offset = 4 * (sample_index % 4 * 2);
index = (sample_index / 4) * 4;
val.idx = (sample_locs_16x[index] >> offset) & 0xf;
out_value[0] = (float)(val.idx + 8) / 16.0f;
val.idx = (sample_locs_16x[index] >> (offset + 4)) & 0xf;
out_value[1] = (float)(val.idx + 8) / 16.0f;
break;
}
}
void si_emit_sample_locations(struct radeon_winsys_cs *cs, int nr_samples)
{
switch (nr_samples) {
default:
case 1:
radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 0);
radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, 0);
radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, 0);
radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, 0);
break;
case 2:
radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_2x[0]);
radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_2x[1]);
radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_2x[2]);
radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_2x[3]);
break;
case 4:
radeon_set_context_reg(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_4x[0]);
radeon_set_context_reg(cs, R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_4x[1]);
radeon_set_context_reg(cs, R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_4x[2]);
radeon_set_context_reg(cs, R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_4x[3]);
break;
case 8:
radeon_set_context_reg_seq(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 14);
radeon_emit(cs, sample_locs_8x[0]);
radeon_emit(cs, sample_locs_8x[4]);
radeon_emit(cs, 0);
radeon_emit(cs, 0);
radeon_emit(cs, sample_locs_8x[1]);
radeon_emit(cs, sample_locs_8x[5]);
radeon_emit(cs, 0);
radeon_emit(cs, 0);
radeon_emit(cs, sample_locs_8x[2]);
radeon_emit(cs, sample_locs_8x[6]);
radeon_emit(cs, 0);
radeon_emit(cs, 0);
radeon_emit(cs, sample_locs_8x[3]);
radeon_emit(cs, sample_locs_8x[7]);
break;
case 16:
radeon_set_context_reg_seq(cs, R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 16);
radeon_emit(cs, sample_locs_16x[0]);
radeon_emit(cs, sample_locs_16x[4]);
radeon_emit(cs, sample_locs_16x[8]);
radeon_emit(cs, sample_locs_16x[12]);
radeon_emit(cs, sample_locs_16x[1]);
radeon_emit(cs, sample_locs_16x[5]);
radeon_emit(cs, sample_locs_16x[9]);
radeon_emit(cs, sample_locs_16x[13]);
radeon_emit(cs, sample_locs_16x[2]);
radeon_emit(cs, sample_locs_16x[6]);
radeon_emit(cs, sample_locs_16x[10]);
radeon_emit(cs, sample_locs_16x[14]);
radeon_emit(cs, sample_locs_16x[3]);
radeon_emit(cs, sample_locs_16x[7]);
radeon_emit(cs, sample_locs_16x[11]);
radeon_emit(cs, sample_locs_16x[15]);
break;
}
}
void si_init_msaa_functions(struct si_context *sctx)
{
int i;
sctx->b.b.get_sample_position = si_get_sample_position;
si_get_sample_position(&sctx->b.b, 1, 0, sctx->sample_locations_1x[0]);
for (i = 0; i < 2; i++)
si_get_sample_position(&sctx->b.b, 2, i, sctx->sample_locations_2x[i]);
for (i = 0; i < 4; i++)
si_get_sample_position(&sctx->b.b, 4, i, sctx->sample_locations_4x[i]);
for (i = 0; i < 8; i++)
si_get_sample_position(&sctx->b.b, 8, i, sctx->sample_locations_8x[i]);
for (i = 0; i < 16; i++)
si_get_sample_position(&sctx->b.b, 16, i, sctx->sample_locations_16x[i]);
}
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