renderer: refactor draw time ubo binding

This refactors out the shader type code into a separate function,
makes it easier to add compute support later.

Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/vrend_renderer.c

@@ -3033,51 +3033,56 @@ static void vrend_draw_bind_samplers(struct vrend_context *ctx)
    ctx->sub->sampler_state_dirty = false;
 }
 
-static void vrend_draw_bind_ubo(struct vrend_context *ctx)
+static void vrend_draw_bind_ubo_shader(struct vrend_context *ctx,
+                                       int shader_type, int *ubo_id)
 {
-   int i;
-   int ubo_id;
-   int shader_type;
+   uint32_t mask;
+   int shader_ubo_idx;
+   struct pipe_constant_buffer *cb;
+   struct vrend_resource *res;
+   struct vrend_shader_info* sinfo;
 
-   ubo_id = 0;
-   for (shader_type = PIPE_SHADER_VERTEX; shader_type <= ctx->sub->last_shader_idx; shader_type++) {
-      uint32_t mask;
-      int shader_ubo_idx;
-      struct pipe_constant_buffer *cb;
-      struct vrend_resource *res;
-      struct vrend_shader_info* sinfo;
+   if (!ctx->sub->const_bufs_used_mask[shader_type])
+      return;
 
-      if (!ctx->sub->const_bufs_used_mask[shader_type])
-         continue;
+   if (!ctx->sub->prog->ubo_locs[shader_type])
+      return;
 
-      if (!ctx->sub->prog->ubo_locs[shader_type])
-         continue;
+   sinfo = &ctx->sub->prog->ss[shader_type]->sel->sinfo;
 
-      sinfo = &ctx->sub->prog->ss[shader_type]->sel->sinfo;
+   mask = ctx->sub->const_bufs_used_mask[shader_type];
+   while (mask) {
+      /* The const_bufs_used_mask stores the gallium uniform buffer indices */
+      int i = u_bit_scan(&mask);
 
-      mask = ctx->sub->const_bufs_used_mask[shader_type];
-      while (mask) {
-         /* The const_bufs_used_mask stores the gallium uniform buffer indices */
-         i = u_bit_scan(&mask);
+      /* The cbs array is indexed using the gallium uniform buffer index */
+      cb = &ctx->sub->cbs[shader_type][i];
+      res = (struct vrend_resource *)cb->buffer;
 
-         /* The cbs array is indexed using the gallium uniform buffer index */
-         cb = &ctx->sub->cbs[shader_type][i];
-         res = (struct vrend_resource *)cb->buffer;
+      /* Find the index of the uniform buffer in the array of shader ubo data */
+      for (shader_ubo_idx = 0; shader_ubo_idx < sinfo->num_ubos; shader_ubo_idx++) {
+         if (sinfo->ubo_idx[shader_ubo_idx] == i)
+            break;
+      }
+      if (shader_ubo_idx == sinfo->num_ubos)
+         continue;
 
-         /* Find the index of the uniform buffer in the array of shader ubo data */
-         for (shader_ubo_idx = 0; shader_ubo_idx < sinfo->num_ubos; shader_ubo_idx++) {
-            if (sinfo->ubo_idx[shader_ubo_idx] == i)
-               break;
-         }
-         if (shader_ubo_idx == sinfo->num_ubos)
-             continue;
+      glBindBufferRange(GL_UNIFORM_BUFFER, *ubo_id, res->id,
+                        cb->buffer_offset, cb->buffer_size);
+      /* The ubo_locs array is indexed using the shader ubo index */
+      glUniformBlockBinding(ctx->sub->prog->id, ctx->sub->prog->ubo_locs[shader_type][shader_ubo_idx], *ubo_id);
+      (*ubo_id)++;
+   }
+}
 
-         glBindBufferRange(GL_UNIFORM_BUFFER, ubo_id, res->id,
-                           cb->buffer_offset, cb->buffer_size);
-         /* The ubo_locs array is indexed using the shader ubo index */
-         glUniformBlockBinding(ctx->sub->prog->id, ctx->sub->prog->ubo_locs[shader_type][shader_ubo_idx], ubo_id);
-         ubo_id++;
-      }
+static void vrend_draw_bind_ubo(struct vrend_context *ctx)
+{
+   int ubo_id;
+   int shader_type;
+
+   ubo_id = 0;
+   for (shader_type = PIPE_SHADER_VERTEX; shader_type <= ctx->sub->last_shader_idx; shader_type++) {
+      vrend_draw_bind_ubo_shader(ctx, shader_type, &ubo_id);
    }
 }