[Mesa-dev] [PATCH 2/4] i965: create code path to handle primitive restart in hardware
Jordan Justen
jordan.l.justen at intel.com
Sun May 13 07:06:25 PDT 2012
For newer hardware we disable the VBO module's software handling
of primitive restart. We now handle primitive restarts in
brw_handle_primitive_restart.
The initial version of brw_handle_primitive_restart simply calls
vbo_sw_primitive_restart, and therefore still uses the VBO
module software primitive restart support.
Signed-off-by: Jordan Justen <jordan.l.justen at intel.com>
---
src/mesa/drivers/dri/i965/Makefile.sources | 1 +
src/mesa/drivers/dri/i965/brw_context.c | 2 +
src/mesa/drivers/dri/i965/brw_context.h | 5 ++
src/mesa/drivers/dri/i965/brw_draw.c | 6 ++
src/mesa/drivers/dri/i965/brw_draw.h | 10 ++-
src/mesa/drivers/dri/i965/brw_primitive_restart.c | 80 +++++++++++++++++++++
src/mesa/drivers/dri/intel/intel_extensions.c | 4 +-
7 files changed, 104 insertions(+), 4 deletions(-)
create mode 100644 src/mesa/drivers/dri/i965/brw_primitive_restart.c
diff --git a/src/mesa/drivers/dri/i965/Makefile.sources b/src/mesa/drivers/dri/i965/Makefile.sources
index c99a034..36d4831 100644
--- a/src/mesa/drivers/dri/i965/Makefile.sources
+++ b/src/mesa/drivers/dri/i965/Makefile.sources
@@ -55,6 +55,7 @@ i965_C_FILES = \
brw_misc_state.c \
brw_optimize.c \
brw_program.c \
+ brw_primitive_restart.c \
brw_queryobj.c \
brw_sf.c \
brw_sf_emit.c \
diff --git a/src/mesa/drivers/dri/i965/brw_context.c b/src/mesa/drivers/dri/i965/brw_context.c
index 65de260..3ef5a57 100644
--- a/src/mesa/drivers/dri/i965/brw_context.c
+++ b/src/mesa/drivers/dri/i965/brw_context.c
@@ -295,6 +295,8 @@ brwCreateContext(int api,
brw->has_negative_rhw_bug = true;
}
+ brw->prim_restart.in_progress = false;
+
brw_init_state( brw );
brw->curbe.last_buf = calloc(1, 4096);
diff --git a/src/mesa/drivers/dri/i965/brw_context.h b/src/mesa/drivers/dri/i965/brw_context.h
index 141fb65..dabfdf4 100644
--- a/src/mesa/drivers/dri/i965/brw_context.h
+++ b/src/mesa/drivers/dri/i965/brw_context.h
@@ -1000,6 +1000,11 @@ struct brw_context
uint32_t render_target_format[MESA_FORMAT_COUNT];
bool format_supported_as_render_target[MESA_FORMAT_COUNT];
+
+ /* PrimitiveRestart */
+ struct {
+ bool in_progress;
+ } prim_restart;
};
diff --git a/src/mesa/drivers/dri/i965/brw_draw.c b/src/mesa/drivers/dri/i965/brw_draw.c
index 813f7c8..16ce994 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.c
+++ b/src/mesa/drivers/dri/i965/brw_draw.c
@@ -545,6 +545,12 @@ void brw_draw_prims( struct gl_context *ctx,
if (!_mesa_check_conditional_render(ctx))
return;
+ /* Handle primitive restart if needed */
+ if (brw_handle_primitive_restart(ctx, prim, nr_prims, ib)) {
+ /* The draw was handled, so we can exit now */
+ return;
+ }
+
if (!vbo_all_varyings_in_vbos(arrays)) {
if (!index_bounds_valid)
vbo_get_minmax_indices(ctx, prim, ib, &min_index, &max_index, nr_prims);
diff --git a/src/mesa/drivers/dri/i965/brw_draw.h b/src/mesa/drivers/dri/i965/brw_draw.h
index 2cc4cb3..2f25e5c 100644
--- a/src/mesa/drivers/dri/i965/brw_draw.h
+++ b/src/mesa/drivers/dri/i965/brw_draw.h
@@ -30,9 +30,7 @@
#include "main/mtypes.h" /* for struct gl_context... */
#include "vbo/vbo.h"
-
-struct brw_context;
-
+#include "brw_context.h"
void brw_draw_prims( struct gl_context *ctx,
const struct _mesa_prim *prims,
@@ -51,4 +49,10 @@ void brw_draw_destroy( struct brw_context *brw );
void brw_init_current_values(struct gl_context *ctx,
struct gl_client_array *arrays);
+/* brw_primitive_restart.c */
+bool brw_handle_primitive_restart(struct gl_context *ctx,
+ const struct _mesa_prim *prim,
+ GLuint nr_prims,
+ const struct _mesa_index_buffer *ib);
+
#endif
diff --git a/src/mesa/drivers/dri/i965/brw_primitive_restart.c b/src/mesa/drivers/dri/i965/brw_primitive_restart.c
new file mode 100644
index 0000000..20a9226
--- /dev/null
+++ b/src/mesa/drivers/dri/i965/brw_primitive_restart.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright © 2012 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:
+ * Jordan Justen <jordan.l.justen at intel.com>
+ *
+ */
+
+#include "main/imports.h"
+#include "main/bufferobj.h"
+
+#include "brw_context.h"
+#include "brw_draw.h"
+
+bool brw_handle_primitive_restart(struct gl_context *ctx,
+ const struct _mesa_prim *prim,
+ GLuint nr_prims,
+ const struct _mesa_index_buffer *ib)
+{
+ struct brw_context *brw = brw_context(ctx);
+
+ /* We only need to handle cases where there is an index buffer. */
+ if (ib == NULL) {
+ return false;
+ }
+
+ /* If the driver has requested software handling of primitive restarts,
+ * then the VBO module has already taken care of things, and we can
+ * just draw as normal.
+ */
+ if (ctx->Const.PrimitiveRestartInSoftware) {
+ return false;
+ }
+
+ /* If we have set the in_progress flag, then we are in the middle
+ * of handling the primitive restart draw.
+ */
+ if (brw->prim_restart.in_progress) {
+ return false;
+ }
+
+ /* If PrimitiveRestart is not enabled, then we aren't concerned about
+ * handling this draw.
+ */
+ if (!(ctx->Array.PrimitiveRestart)) {
+ return false;
+ }
+
+ /* Signal that we are in the process of handling the
+ * primitive restart draw
+ */
+ brw->prim_restart.in_progress = true;
+
+ vbo_sw_primitive_restart(ctx, prim, nr_prims, ib);
+
+ brw->prim_restart.in_progress = false;
+
+ /* The primitive restart draw was completed, so return true. */
+ return true;
+}
+
diff --git a/src/mesa/drivers/dri/intel/intel_extensions.c b/src/mesa/drivers/dri/intel/intel_extensions.c
index 858606d..9c64e0f 100755
--- a/src/mesa/drivers/dri/intel/intel_extensions.c
+++ b/src/mesa/drivers/dri/intel/intel_extensions.c
@@ -168,6 +168,8 @@ intelInitExtensions(struct gl_context *ctx)
ctx->Extensions.EXT_texture_compression_s3tc = true;
}
- ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
+ if (intel->gen < 4) {
+ ctx->Const.PrimitiveRestartInSoftware = GL_TRUE;
+ }
ctx->Extensions.NV_primitive_restart = true;
}
--
1.7.9.5
More information about the mesa-dev
mailing list