Mesa (master): st/mesa: implement layered framebuffer clear for the clear_with_quad fallback
Marek Olšák
mareko at kemper.freedesktop.org
Tue Dec 3 18:40:56 UTC 2013
Module: Mesa
Branch: master
Commit: e47af58bb411c7779857ad96a7cc3306980311ae
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=e47af58bb411c7779857ad96a7cc3306980311ae
Author: Marek Olšák <marek.olsak at amd.com>
Date: Thu Nov 21 15:50:31 2013 +0100
st/mesa: implement layered framebuffer clear for the clear_with_quad fallback
Same approach as in u_blitter.
---
src/gallium/auxiliary/cso_cache/cso_context.c | 20 +++++++++
src/gallium/auxiliary/cso_cache/cso_context.h | 5 ++
src/mesa/state_tracker/st_cb_clear.c | 58 ++++++++++++++++++-------
src/mesa/state_tracker/st_context.h | 1 +
4 files changed, 68 insertions(+), 16 deletions(-)
diff --git a/src/gallium/auxiliary/cso_cache/cso_context.c b/src/gallium/auxiliary/cso_cache/cso_context.c
index 33adee8..8d217a4 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.c
+++ b/src/gallium/auxiliary/cso_cache/cso_context.c
@@ -1416,3 +1416,23 @@ cso_draw_arrays(struct cso_context *cso, uint mode, uint start, uint count)
cso_draw_vbo(cso, &info);
}
+
+void
+cso_draw_arrays_instanced(struct cso_context *cso, uint mode,
+ uint start, uint count,
+ uint start_instance, uint instance_count)
+{
+ struct pipe_draw_info info;
+
+ util_draw_init_info(&info);
+
+ info.mode = mode;
+ info.start = start;
+ info.count = count;
+ info.min_index = start;
+ info.max_index = start + count - 1;
+ info.start_instance = start_instance;
+ info.instance_count = instance_count;
+
+ cso_draw_vbo(cso, &info);
+}
diff --git a/src/gallium/auxiliary/cso_cache/cso_context.h b/src/gallium/auxiliary/cso_cache/cso_context.h
index 82c8e18..4b433b1 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.h
+++ b/src/gallium/auxiliary/cso_cache/cso_context.h
@@ -228,6 +228,11 @@ void
cso_draw_vbo(struct cso_context *cso,
const struct pipe_draw_info *info);
+void
+cso_draw_arrays_instanced(struct cso_context *cso, uint mode,
+ uint start, uint count,
+ uint start_instance, uint instance_count);
+
/* helper drawing function */
void
cso_draw_arrays(struct cso_context *cso, uint mode, uint start, uint count);
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
index 8da664a..274cc47 100644
--- a/src/mesa/state_tracker/st_cb_clear.c
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -51,6 +51,7 @@
#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "util/u_format.h"
+#include "util/u_framebuffer.h"
#include "util/u_inlines.h"
#include "util/u_simple_shaders.h"
#include "util/u_draw_quad.h"
@@ -129,6 +130,26 @@ set_vertex_shader(struct st_context *st)
}
+static void
+set_vertex_shader_layered(struct st_context *st)
+{
+ struct pipe_context *pipe = st->pipe;
+
+ if (!pipe->screen->get_param(pipe->screen, PIPE_CAP_TGSI_INSTANCEID) ||
+ !pipe->screen->get_param(pipe->screen, PIPE_CAP_TGSI_VS_LAYER)) {
+ assert(!"Got layered clear, but the VS layer output is unsupported");
+ set_vertex_shader(st);
+ return;
+ }
+
+ if (!st->clear.vs_layered) {
+ st->clear.vs_layered = util_make_layered_clear_vertex_shader(pipe);
+ }
+
+ cso_set_vertex_shader_handle(st->cso_context, st->clear.vs_layered);
+}
+
+
/**
* Draw a screen-aligned quadrilateral.
* Coords are clip coords with y=0=bottom.
@@ -136,15 +157,19 @@ set_vertex_shader(struct st_context *st)
static void
draw_quad(struct st_context *st,
float x0, float y0, float x1, float y1, GLfloat z,
+ unsigned num_instances,
const union pipe_color_union *color)
{
- struct pipe_context *pipe = st->pipe;
- struct pipe_resource *vbuf = NULL;
- GLuint i, offset;
+ struct cso_context *cso = st->cso_context;
+ struct pipe_vertex_buffer vb = {0};
+ GLuint i;
float (*vertices)[2][4]; /**< vertex pos + color */
+ vb.stride = 8 * sizeof(float);
+
if (u_upload_alloc(st->uploader, 0, 4 * sizeof(vertices[0]),
- &offset, &vbuf, (void **) &vertices) != PIPE_OK) {
+ &vb.buffer_offset, &vb.buffer,
+ (void **) &vertices) != PIPE_OK) {
return;
}
@@ -174,16 +199,10 @@ draw_quad(struct st_context *st,
u_upload_unmap(st->uploader);
/* draw */
- util_draw_vertex_buffer(pipe,
- st->cso_context,
- vbuf,
- cso_get_aux_vertex_buffer_slot(st->cso_context),
- offset,
- PIPE_PRIM_TRIANGLE_FAN,
- 4, /* verts */
- 2); /* attribs/vert */
-
- pipe_resource_reference(&vbuf, NULL);
+ cso_set_vertex_buffers(cso, cso_get_aux_vertex_buffer_slot(cso), 1, &vb);
+ cso_draw_arrays_instanced(cso, PIPE_PRIM_TRIANGLE_FAN, 0, 4,
+ 0, num_instances);
+ pipe_resource_reference(&vb.buffer, NULL);
}
@@ -206,6 +225,8 @@ clear_with_quad(struct gl_context *ctx,
const GLfloat y0 = (GLfloat) ctx->DrawBuffer->_Ymin / fb_height * 2.0f - 1.0f;
const GLfloat y1 = (GLfloat) ctx->DrawBuffer->_Ymax / fb_height * 2.0f - 1.0f;
union pipe_color_union clearColor;
+ unsigned num_layers =
+ util_framebuffer_get_num_layers(&st->state.framebuffer);
/*
printf("%s %s%s%s %f,%f %f,%f\n", __FUNCTION__,
@@ -305,9 +326,13 @@ clear_with_quad(struct gl_context *ctx,
}
set_fragment_shader(st);
- set_vertex_shader(st);
cso_set_geometry_shader_handle(st->cso_context, NULL);
+ if (num_layers > 1)
+ set_vertex_shader_layered(st);
+ else
+ set_vertex_shader(st);
+
if (ctx->DrawBuffer->_ColorDrawBuffers[0]) {
struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
GLboolean is_integer = _mesa_is_enum_format_integer(rb->InternalFormat);
@@ -319,7 +344,8 @@ clear_with_quad(struct gl_context *ctx,
}
/* draw quad matching scissor rect */
- draw_quad(st, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, &clearColor);
+ draw_quad(st, x0, y0, x1, y1, (GLfloat) ctx->Depth.Clear, num_layers,
+ &clearColor);
/* Restore pipe state */
cso_restore_blend(st->cso_context);
diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index ab89b49..cd0a5ae 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -178,6 +178,7 @@ struct st_context
struct pipe_viewport_state viewport;
void *vs;
void *fs;
+ void *vs_layered;
} clear;
/** used for anything using util_draw_vertex_buffer */
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