gallium: Add support for multiple viewports

Gallium supported only a single viewport/scissor combination. This
commit changes the interface to allow us to add support for multiple
viewports/scissors.

Signed-off-by: Zack Rusin <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Reviewed-by: José Fonseca<[email protected]>
Reviewed-by: Brian Paul <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>

13 files changed, 32 insertions, 19 deletions

diff --git a/src/gallium/auxiliary/cso_cache/cso_context.c b/src/gallium/auxiliary/cso_cache/cso_context.c
index e46f2abf632..b06a070ad83 100644
--- a/src/gallium/auxiliary/cso_cache/cso_context.c
+++ b/src/gallium/auxiliary/cso_cache/cso_context.c
@@ -652,7 +652,7 @@ void cso_set_viewport(struct cso_context *ctx,
 {
    if (memcmp(&ctx->vp, vp, sizeof(*vp))) {
       ctx->vp = *vp;
-      ctx->pipe->set_viewport_state(ctx->pipe, vp);
+      ctx->pipe->set_viewport_states(ctx->pipe, 0, 1, vp);
    }
 }
 
@@ -666,7 +666,7 @@ void cso_restore_viewport(struct cso_context *ctx)
 {
    if (memcmp(&ctx->vp, &ctx->vp_saved, sizeof(ctx->vp))) {
       ctx->vp = ctx->vp_saved;
-      ctx->pipe->set_viewport_state(ctx->pipe, &ctx->vp);
+      ctx->pipe->set_viewport_states(ctx->pipe, 0, 1, &ctx->vp);
    }
 }
 
diff --git a/src/gallium/auxiliary/draw/draw_context.c b/src/gallium/auxiliary/draw/draw_context.c
index 78190388ef1..b555c65e858 100644
--- a/src/gallium/auxiliary/draw/draw_context.c
+++ b/src/gallium/auxiliary/draw/draw_context.c
@@ -311,9 +311,12 @@ void draw_set_clip_state( struct draw_context *draw,
 /**
  * Set the draw module's viewport state.
  */
-void draw_set_viewport_state( struct draw_context *draw,
-                              const struct pipe_viewport_state *viewport )
+void draw_set_viewport_states( struct draw_context *draw,
+                               unsigned start_slot,
+                               unsigned num_viewports,
+                               const struct pipe_viewport_state *vps )
 {
+   const struct pipe_viewport_state *viewport = vps;
    draw_do_flush(draw, DRAW_FLUSH_PARAMETER_CHANGE);
    draw->viewport = *viewport; /* struct copy */
    draw->identity_viewport = (viewport->scale[0] == 1.0f &&
diff --git a/src/gallium/auxiliary/draw/draw_context.h b/src/gallium/auxiliary/draw/draw_context.h
index 47bad0d73d4..2d843b7a047 100644
--- a/src/gallium/auxiliary/draw/draw_context.h
+++ b/src/gallium/auxiliary/draw/draw_context.h
@@ -71,8 +71,10 @@ void draw_destroy( struct draw_context *draw );
 
 void draw_flush(struct draw_context *draw);
 
-void draw_set_viewport_state( struct draw_context *draw,
-                              const struct pipe_viewport_state *viewport );
+void draw_set_viewport_states( struct draw_context *draw,
+                               unsigned start_slot,
+                               unsigned num_viewports,
+                               const struct pipe_viewport_state *viewports );
 
 void draw_set_clip_state( struct draw_context *pipe,
                           const struct pipe_clip_state *clip );
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.c b/src/gallium/auxiliary/tgsi/tgsi_scan.c
index bd79405a8aa..0230267a5de 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.c
@@ -211,6 +211,12 @@ tgsi_scan_shader(const struct tgsi_token *tokens,
                       fulldecl->Semantic.Name == TGSI_SEMANTIC_EDGEFLAG) {
                      info->writes_edgeflag = TRUE;
                   }
+
+                  if (procType == TGSI_PROCESSOR_GEOMETRY &&
+                      fulldecl->Semantic.Name ==
+                      TGSI_SEMANTIC_VIEWPORT_INDEX) {
+                     info->writes_viewport_index = TRUE;
+                  }
                }
 
              }
diff --git a/src/gallium/auxiliary/tgsi/tgsi_scan.h b/src/gallium/auxiliary/tgsi/tgsi_scan.h
index 9debc341f52..676abf0c9a9 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_scan.h
+++ b/src/gallium/auxiliary/tgsi/tgsi_scan.h
@@ -75,6 +75,7 @@ struct tgsi_shader_info
    boolean origin_lower_left;
    boolean pixel_center_integer;
    boolean color0_writes_all_cbufs;
+   boolean writes_viewport_index;
 
    unsigned num_written_clipdistance;
    /**
diff --git a/src/gallium/auxiliary/tgsi/tgsi_strings.c b/src/gallium/auxiliary/tgsi/tgsi_strings.c
index 95a5aded819..6abf9272a26 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_strings.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_strings.c
@@ -78,7 +78,8 @@ const char *tgsi_semantic_names[TGSI_SEMANTIC_COUNT] =
    "BLOCK_SIZE",
    "THREAD_ID",
    "TEXCOORD",
-   "PCOORD"
+   "PCOORD",
+   "VIEWPORT_INDEX"
 };
 
 const char *tgsi_texture_names[TGSI_TEXTURE_COUNT] =
diff --git a/src/gallium/auxiliary/util/u_blitter.c b/src/gallium/auxiliary/util/u_blitter.c
index 2acc5afc2b8..8c871fdf912 100644
--- a/src/gallium/auxiliary/util/u_blitter.c
+++ b/src/gallium/auxiliary/util/u_blitter.c
@@ -504,7 +504,7 @@ static void blitter_restore_fragment_states(struct blitter_context_priv *ctx)
    /* XXX check whether these are saved and whether they need to be restored
     * (depending on the operation) */
    pipe->set_stencil_ref(pipe, &ctx->base.saved_stencil_ref);
-   pipe->set_viewport_state(pipe, &ctx->base.saved_viewport);
+   pipe->set_viewport_states(pipe, 0, 1, &ctx->base.saved_viewport);
 }
 
 static void blitter_check_saved_fb_state(struct blitter_context_priv *ctx)
@@ -599,7 +599,7 @@ static void blitter_set_rectangle(struct blitter_context_priv *ctx,
    ctx->viewport.translate[1] = 0.5f * ctx->dst_height;
    ctx->viewport.translate[2] = 0.0f;
    ctx->viewport.translate[3] = 0.0f;
-   ctx->base.pipe->set_viewport_state(ctx->base.pipe, &ctx->viewport);
+   ctx->base.pipe->set_viewport_states(ctx->base.pipe, 0, 1, &ctx->viewport);
 }
 
 static void blitter_set_clear_color(struct blitter_context_priv *ctx,
@@ -1401,7 +1401,7 @@ void util_blitter_blit_generic(struct blitter_context *blitter,
 
    pipe->bind_vertex_elements_state(pipe, ctx->velem_state);
    if (scissor) {
-      pipe->set_scissor_state(pipe, scissor);
+      pipe->set_scissor_states(pipe, 0, 1, scissor);
    }
 
    blitter_set_common_draw_rect_state(ctx, scissor != NULL);
@@ -1496,7 +1496,7 @@ void util_blitter_blit_generic(struct blitter_context *blitter,
    blitter_restore_textures(ctx);
    blitter_restore_fb_state(ctx);
    if (scissor) {
-      pipe->set_scissor_state(pipe, &ctx->base.saved_scissor);
+      pipe->set_scissor_states(pipe, 0, 1, &ctx->base.saved_scissor);
    }
    blitter_restore_render_cond(ctx);
    blitter_unset_running_flag(ctx);
diff --git a/src/gallium/auxiliary/vl/vl_compositor.c b/src/gallium/auxiliary/vl/vl_compositor.c
index 62f593a3203..4b8308796eb 100644
--- a/src/gallium/auxiliary/vl/vl_compositor.c
+++ b/src/gallium/auxiliary/vl/vl_compositor.c
@@ -723,7 +723,7 @@ draw_layers(struct vl_compositor *c, struct vl_compositor_state *s, struct u_rec
          void *blend = layer->blend ? layer->blend : i ? c->blend_add : c->blend_clear;
 
          c->pipe->bind_blend_state(c->pipe, blend);
-         c->pipe->set_viewport_state(c->pipe, &layer->viewport);
+         c->pipe->set_viewport_states(c->pipe, 0, 1, &layer->viewport);
          c->pipe->bind_fs_state(c->pipe, layer->fs);
          c->pipe->bind_fragment_sampler_states(c->pipe, num_sampler_views, layer->samplers);
          c->pipe->set_fragment_sampler_views(c->pipe, num_sampler_views, samplers);
@@ -1014,7 +1014,7 @@ vl_compositor_render(struct vl_compositor_state *s,
       dirty_area->x1 = dirty_area->y1 = MIN_DIRTY;
    }
 
-   c->pipe->set_scissor_state(c->pipe, &s->scissor);
+   c->pipe->set_scissor_states(c->pipe, 0, 1, &s->scissor);
    c->pipe->set_framebuffer_state(c->pipe, &c->fb_state);
    c->pipe->bind_vs_state(c->pipe, c->vs);
    c->pipe->set_vertex_buffers(c->pipe, 0, 1, &c->vertex_buf);
diff --git a/src/gallium/auxiliary/vl/vl_idct.c b/src/gallium/auxiliary/vl/vl_idct.c
index bd73dfd40f7..5346cbc0ed7 100644
--- a/src/gallium/auxiliary/vl/vl_idct.c
+++ b/src/gallium/auxiliary/vl/vl_idct.c
@@ -830,14 +830,14 @@ vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_
 
    /* mismatch control */
    idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state_mismatch);
-   idct->pipe->set_viewport_state(idct->pipe, &buffer->viewport_mismatch);
+   idct->pipe->set_viewport_states(idct->pipe, 0, 1, &buffer->viewport_mismatch);
    idct->pipe->bind_vs_state(idct->pipe, idct->vs_mismatch);
    idct->pipe->bind_fs_state(idct->pipe, idct->fs_mismatch);
    util_draw_arrays_instanced(idct->pipe, PIPE_PRIM_POINTS, 0, 1, 0, num_instances);
 
    /* first stage */
    idct->pipe->set_framebuffer_state(idct->pipe, &buffer->fb_state);
-   idct->pipe->set_viewport_state(idct->pipe, &buffer->viewport);
+   idct->pipe->set_viewport_states(idct->pipe, 0, 1, &buffer->viewport);
    idct->pipe->bind_vs_state(idct->pipe, idct->vs);
    idct->pipe->bind_fs_state(idct->pipe, idct->fs);
    util_draw_arrays_instanced(idct->pipe, PIPE_PRIM_QUADS, 0, 4, 0, num_instances);
diff --git a/src/gallium/auxiliary/vl/vl_matrix_filter.c b/src/gallium/auxiliary/vl/vl_matrix_filter.c
index cda90ff10eb..9bd7ed15019 100644
--- a/src/gallium/auxiliary/vl/vl_matrix_filter.c
+++ b/src/gallium/auxiliary/vl/vl_matrix_filter.c
@@ -311,7 +311,7 @@ vl_matrix_filter_render(struct vl_matrix_filter *filter,
    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
    filter->pipe->bind_fs_state(filter->pipe, filter->fs);
    filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
-   filter->pipe->set_viewport_state(filter->pipe, &viewport);
+   filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
 
diff --git a/src/gallium/auxiliary/vl/vl_mc.c b/src/gallium/auxiliary/vl/vl_mc.c
index b4272093655..1fd40c37d16 100644
--- a/src/gallium/auxiliary/vl/vl_mc.c
+++ b/src/gallium/auxiliary/vl/vl_mc.c
@@ -600,7 +600,7 @@ prepare_pipe_4_rendering(struct vl_mc *renderer, struct vl_mc_buffer *buffer, un
       renderer->pipe->bind_blend_state(renderer->pipe, renderer->blend_clear[mask]);
 
    renderer->pipe->set_framebuffer_state(renderer->pipe, &buffer->fb_state);
-   renderer->pipe->set_viewport_state(renderer->pipe, &buffer->viewport);
+   renderer->pipe->set_viewport_states(renderer->pipe, 0, 1, &buffer->viewport);
 }
 
 void
diff --git a/src/gallium/auxiliary/vl/vl_median_filter.c b/src/gallium/auxiliary/vl/vl_median_filter.c
index 2db147904b8..158751a22b3 100644
--- a/src/gallium/auxiliary/vl/vl_median_filter.c
+++ b/src/gallium/auxiliary/vl/vl_median_filter.c
@@ -390,7 +390,7 @@ vl_median_filter_render(struct vl_median_filter *filter,
    filter->pipe->bind_vs_state(filter->pipe, filter->vs);
    filter->pipe->bind_fs_state(filter->pipe, filter->fs);
    filter->pipe->set_framebuffer_state(filter->pipe, &fb_state);
-   filter->pipe->set_viewport_state(filter->pipe, &viewport);
+   filter->pipe->set_viewport_states(filter->pipe, 0, 1, &viewport);
    filter->pipe->set_vertex_buffers(filter->pipe, 0, 1, &filter->quad);
    filter->pipe->bind_vertex_elements_state(filter->pipe, filter->ves);
 
diff --git a/src/gallium/auxiliary/vl/vl_zscan.c b/src/gallium/auxiliary/vl/vl_zscan.c
index 262fb0dc491..33baa3d9902 100644
--- a/src/gallium/auxiliary/vl/vl_zscan.c
+++ b/src/gallium/auxiliary/vl/vl_zscan.c
@@ -576,7 +576,7 @@ vl_zscan_render(struct vl_zscan *zscan, struct vl_zscan_buffer *buffer, unsigned
    zscan->pipe->bind_blend_state(zscan->pipe, zscan->blend);
    zscan->pipe->bind_fragment_sampler_states(zscan->pipe, 3, zscan->samplers);
    zscan->pipe->set_framebuffer_state(zscan->pipe, &buffer->fb_state);
-   zscan->pipe->set_viewport_state(zscan->pipe, &buffer->viewport);
+   zscan->pipe->set_viewport_states(zscan->pipe, 0, 1, &buffer->viewport);
    zscan->pipe->set_fragment_sampler_views(zscan->pipe, 3, &buffer->src);
    zscan->pipe->bind_vs_state(zscan->pipe, zscan->vs);
    zscan->pipe->bind_fs_state(zscan->pipe, zscan->fs);