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softpipe: add layered rendering support.

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This adds support for GL 3.2 layered rendering to softpipe.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Dave Airlie 2014-06-10 13:32:25 +10:00
parent dc8fc39ada
commit 740d5bed77
7 changed files with 55 additions and 9 deletions
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3
src/gallium/drivers/softpipe/sp_context.h
View file

@ -121,6 +121,9 @@ struct softpipe_context {
/** Which vertex shader output slot contains point size */
int psize_slot;
/** Which vertex shader output slot contains layer */
int layer_slot;
/** The reduced version of the primitive supplied by the state tracker */
unsigned reduced_api_prim;

1
src/gallium/drivers/softpipe/sp_quad.h
View file

@ -62,6 +62,7 @@
struct quad_header_input
{
int x0, y0; /**< quad window pos, always even */
unsigned layer;
float coverage[TGSI_QUAD_SIZE]; /**< fragment coverage for antialiasing */
unsigned facing:1; /**< Front (0) or back (1) facing? */
unsigned prim:2; /**< QUAD_PRIM_POINT, LINE, TRI */

8
src/gallium/drivers/softpipe/sp_quad_blend.c
View file

@ -935,7 +935,7 @@ blend_fallback(struct quad_stage *qs,
struct softpipe_cached_tile *tile
= sp_get_cached_tile(softpipe->cbuf_cache[cbuf],
quads[0]->input.x0,
quads[0]->input.y0, 0);
quads[0]->input.y0, quads[0]->input.layer);
const boolean clamp = bqs->clamp[cbuf];
const float *blend_color;
const boolean dual_source_blend = util_blend_state_is_dual(blend, cbuf);
@ -1038,7 +1038,7 @@ blend_single_add_src_alpha_inv_src_alpha(struct quad_stage *qs,
struct softpipe_cached_tile *tile
= sp_get_cached_tile(qs->softpipe->cbuf_cache[0],
quads[0]->input.x0,
quads[0]->input.y0, 0);
quads[0]->input.y0, quads[0]->input.layer);
for (q = 0; q < nr; q++) {
struct quad_header *quad = quads[q];
@ -1112,7 +1112,7 @@ blend_single_add_one_one(struct quad_stage *qs,
struct softpipe_cached_tile *tile
= sp_get_cached_tile(qs->softpipe->cbuf_cache[0],
quads[0]->input.x0,
quads[0]->input.y0, 0);
quads[0]->input.y0, quads[0]->input.layer);
for (q = 0; q < nr; q++) {
struct quad_header *quad = quads[q];
@ -1180,7 +1180,7 @@ single_output_color(struct quad_stage *qs,
struct softpipe_cached_tile *tile
= sp_get_cached_tile(qs->softpipe->cbuf_cache[0],
quads[0]->input.x0,
quads[0]->input.y0, 0);
quads[0]->input.y0, quads[0]->input.layer);
for (q = 0; q < nr; q++) {
struct quad_header *quad = quads[q];

2
src/gallium/drivers/softpipe/sp_quad_depth_test.c
View file

@ -801,7 +801,7 @@ depth_test_quads_fallback(struct quad_stage *qs,
data.format = data.ps->format;
data.tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache,
quads[0]->input.x0,
quads[0]->input.y0, 0);
quads[0]->input.y0, quads[0]->input.layer);
data.clamp = !qs->softpipe->rasterizer->depth_clip;
near_val = qs->softpipe->viewport.translate[2] - qs->softpipe->viewport.scale[2];

2
src/gallium/drivers/softpipe/sp_quad_depth_test_tmp.h
View file

@ -71,7 +71,7 @@ NAME(struct quad_stage *qs,
depth_step = (ushort)(dzdx * scale);
tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache, ix, iy, 0);
tile = sp_get_cached_tile(qs->softpipe->zsbuf_cache, ix, iy, quads[0]->input.layer);
for (i = 0; i < nr; i++) {
const unsigned outmask = quads[i]->inout.mask;

42
src/gallium/drivers/softpipe/sp_setup.c
View file

@ -92,6 +92,7 @@ struct setup_context {
int facing;
float pixel_offset;
unsigned max_layer;
struct quad_header quad[MAX_QUADS];
struct quad_header *quad_ptrs[MAX_QUADS];
@ -801,7 +802,7 @@ sp_setup_tri(struct setup_context *setup,
const float (*v2)[4])
{
float det;
uint layer = 0;
#if DEBUG_VERTS
debug_printf("Setup triangle:\n");
print_vertex(setup, v0);
@ -834,6 +835,11 @@ sp_setup_tri(struct setup_context *setup,
setup->span.right[0] = 0;
setup->span.right[1] = 0;
/* setup->span.z_mode = tri_z_mode( setup->ctx ); */
if (setup->softpipe->layer_slot > 0) {
layer = *(unsigned *)v1[setup->softpipe->layer_slot];
layer = MIN2(layer, setup->max_layer);
}
setup->quad[0].input.layer = layer;
/* init_constant_attribs( setup ); */
@ -1072,6 +1078,7 @@ sp_setup_line(struct setup_context *setup,
int dx = x1 - x0;
int dy = y1 - y0;
int xstep, ystep;
uint layer = 0;
#if DEBUG_VERTS
debug_printf("Setup line:\n");
@ -1115,6 +1122,11 @@ sp_setup_line(struct setup_context *setup,
setup->quad[0].input.x0 = setup->quad[0].input.y0 = -1;
setup->quad[0].inout.mask = 0x0;
if (setup->softpipe->layer_slot > 0) {
layer = *(unsigned *)v1[setup->softpipe->layer_slot];
layer = MIN2(layer, setup->max_layer);
}
setup->quad[0].input.layer = layer;
/* XXX temporary: set coverage to 1.0 so the line appears
* if AA mode happens to be enabled.
@ -1206,7 +1218,7 @@ sp_setup_point(struct setup_context *setup,
const float y = v0[0][1];
const struct vertex_info *vinfo = softpipe_get_vertex_info(softpipe);
uint fragSlot;
uint layer = 0;
#if DEBUG_VERTS
debug_printf("Setup point:\n");
print_vertex(setup, v0);
@ -1217,6 +1229,12 @@ sp_setup_point(struct setup_context *setup,
assert(setup->softpipe->reduced_prim == PIPE_PRIM_POINTS);
if (setup->softpipe->layer_slot > 0) {
layer = *(unsigned *)v0[setup->softpipe->layer_slot];
layer = MIN2(layer, setup->max_layer);
}
setup->quad[0].input.layer = layer;
/* For points, all interpolants are constant-valued.
* However, for point sprites, we'll need to setup texcoords appropriately.
* XXX: which coefficients are the texcoords???
@ -1401,7 +1419,8 @@ void
sp_setup_prepare(struct setup_context *setup)
{
struct softpipe_context *sp = setup->softpipe;
int i;
unsigned max_layer = ~0;
if (sp->dirty) {
softpipe_update_derived(sp, sp->reduced_api_prim);
}
@ -1409,6 +1428,23 @@ sp_setup_prepare(struct setup_context *setup)
/* Note: nr_attrs is only used for debugging (vertex printing) */
setup->nr_vertex_attrs = draw_num_shader_outputs(sp->draw);
/*
* Determine how many layers the fb has (used for clamping layer value).
* OpenGL (but not d3d10) permits different amount of layers per rt, however
* results are undefined if layer exceeds the amount of layers of ANY
* attachment hence don't need separate per cbuf and zsbuf max.
*/
for (i = 0; i < setup->softpipe->framebuffer.nr_cbufs; i++) {
struct pipe_surface *cbuf = setup->softpipe->framebuffer.cbufs[i];
if (cbuf) {
max_layer = MIN2(max_layer,
cbuf->u.tex.last_layer - cbuf->u.tex.first_layer);
}
}
setup->max_layer = max_layer;
sp->quad.first->begin( sp->quad.first );
if (sp->reduced_api_prim == PIPE_PRIM_TRIANGLES &&

6
src/gallium/drivers/softpipe/sp_state_derived.c
View file

@ -142,6 +142,12 @@ softpipe_get_vertex_info(struct softpipe_context *softpipe)
softpipe->psize_slot);
}
softpipe->layer_slot = draw_find_shader_output(softpipe->draw,
TGSI_SEMANTIC_LAYER, 0);
if (softpipe->layer_slot >= 0) {
draw_emit_vertex_attr(vinfo, EMIT_4F, INTERP_CONSTANT, softpipe->layer_slot);
}
draw_compute_vertex_size(vinfo);
}