radeonsi: import cayman_msaa.c from drivers/radeon

Reviewed-by: Nicolai Hähnle <[email protected]>

1 files changed, 209 insertions, 0 deletions

diff --git a/src/gallium/drivers/radeonsi/si_state_msaa.c b/src/gallium/drivers/radeonsi/si_state_msaa.c
new file mode 100644
index 00000000000..977f54b9078
--- /dev/null
+++ b/src/gallium/drivers/radeonsi/si_state_msaa.c
@@ -0,0 +1,209 @@
+/*
+ * 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.
+ *
+ * Authors: Marek Olšák <[email protected]>
+ *
+ */
+
+#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, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, 0);
+		radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, 0);
+		radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, 0);
+		radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, 0);
+		break;
+	case 2:
+		radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_2x[0]);
+		radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_2x[1]);
+		radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_2x[2]);
+		radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_2x[3]);
+		break;
+	case 4:
+		radeon_set_context_reg(cs, CM_R_028BF8_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y0_0, sample_locs_4x[0]);
+		radeon_set_context_reg(cs, CM_R_028C08_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y0_0, sample_locs_4x[1]);
+		radeon_set_context_reg(cs, CM_R_028C18_PA_SC_AA_SAMPLE_LOCS_PIXEL_X0Y1_0, sample_locs_4x[2]);
+		radeon_set_context_reg(cs, CM_R_028C28_PA_SC_AA_SAMPLE_LOCS_PIXEL_X1Y1_0, sample_locs_4x[3]);
+		break;
+	case 8:
+		radeon_set_context_reg_seq(cs, CM_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, CM_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]);
+}