[gtk+/wip/otte/vulkan: 60/62] vulkan: Don't limit number of descriptor sets

[Benjamin Otte <otte src gnome org>]

commit b3388aaca992564b1b244c1df5adb2859a15bd57
Author: Benjamin Otte <otte redhat com>
Date:   Fri Dec 9 06:09:52 2016 +0100

    vulkan: Don't limit number of descriptor sets
    
    If we need more than we have reserved as maximum, recreate the
    descriptor pool with a higher maximum.

 gsk/gskvulkanrender.c |   35 +++++++++++++++++++++++++++++++----
 1 files changed, 31 insertions(+), 4 deletions(-)
---
diff --git a/gsk/gskvulkanrender.c b/gsk/gskvulkanrender.c
index 12b390d..8c14519 100644
--- a/gsk/gskvulkanrender.c
+++ b/gsk/gskvulkanrender.c
@@ -331,11 +331,38 @@ gsk_vulkan_render_prepare_descriptor_sets (GskVulkanRender *self,
   needed_sets = g_hash_table_size (self->descriptor_set_indexes);
   if (needed_sets > self->n_descriptor_sets)
     {
-      g_assert (needed_sets < self->descriptor_pool_maxsets);
+      if (needed_sets > self->descriptor_pool_maxsets)
+        {
+          guint added_sets = needed_sets - self->descriptor_pool_maxsets;
+          added_sets = added_sets + DESCRIPTOR_POOL_MAXSETS_INCREASE - 1;
+          added_sets -= added_sets % DESCRIPTOR_POOL_MAXSETS_INCREASE;
+
+          vkDestroyDescriptorPool (device,
+                                   self->descriptor_pool,
+                                   NULL);
+          self->descriptor_pool_maxsets += added_sets;
+          GSK_VK_CHECK (vkCreateDescriptorPool, device,
+                                                &(VkDescriptorPoolCreateInfo) {
+                                                    .sType = VK_STRUCTURE_TYPE_DESCRIPTOR_POOL_CREATE_INFO,
+                                                    .maxSets = self->descriptor_pool_maxsets,
+                                                    .poolSizeCount = 1,
+                                                    .pPoolSizes = (VkDescriptorPoolSize[1]) {
+                                                        {
+                                                            .type = 
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
+                                                            .descriptorCount = 1
+                                                        }
+                                                    }
+                                                },
+                                                NULL,
+                                                &self->descriptor_pool);
+        }
+      else
+        {
+          GSK_VK_CHECK (vkResetDescriptorPool, device,
+                                               self->descriptor_pool,
+                                               0);
+        }
 
-      GSK_VK_CHECK (vkResetDescriptorPool, device,
-                                           self->descriptor_pool,
-                                           0);
       self->n_descriptor_sets = needed_sets;
       self->descriptor_sets = g_renew (VkDescriptorSet, self->descriptor_sets, needed_sets);