[gtk+/wip/matthiasc/renderpasses: 7/10] Add an api to create intermediate textures

[Matthias Clasen <matthiasc src gnome org>]

commit d297201e5c25e0d2236a5ba40f773ce789abb425
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 26 19:12:20 2017 -0400

    Add an api to create intermediate textures

 gsk/gskvulkanimage.c        |   21 +++++++++++++++++++++
 gsk/gskvulkanimageprivate.h |    3 +++
 2 files changed, 24 insertions(+), 0 deletions(-)
---
diff --git a/gsk/gskvulkanimage.c b/gsk/gskvulkanimage.c
index 1eb9c3a..5a286e1 100644
--- a/gsk/gskvulkanimage.c
+++ b/gsk/gskvulkanimage.c
@@ -604,6 +604,27 @@ gsk_vulkan_image_new_for_atlas (GdkVulkanContext *context,
   return self;
 }
 
+GskVulkanImage *
+gsk_vulkan_image_new_for_texture (GdkVulkanContext *context,
+                                  gsize             width,
+                                  gsize             height)
+{
+  GskVulkanImage *self;
+
+  self = gsk_vulkan_image_new (context,
+                               width,
+                               height,
+                               VK_IMAGE_TILING_OPTIMAL,
+                               VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT,
+                               VK_IMAGE_LAYOUT_UNDEFINED,
+                               VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT,
+                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
+
+  gsk_vulkan_image_ensure_view (self, VK_FORMAT_B8G8R8A8_UNORM);
+
+  return self;
+}
+
 GskTexture *
 gsk_vulkan_image_download (GskVulkanImage    *self,
                            GskVulkanUploader *uploader)
diff --git a/gsk/gskvulkanimageprivate.h b/gsk/gskvulkanimageprivate.h
index 8676062..f6223e9 100644
--- a/gsk/gskvulkanimageprivate.h
+++ b/gsk/gskvulkanimageprivate.h
@@ -51,6 +51,9 @@ GskVulkanImage *        gsk_vulkan_image_new_for_framebuffer            (GdkVulk
 GskVulkanImage *        gsk_vulkan_image_new_for_atlas                  (GdkVulkanContext       *context,
                                                                          gsize                   width,
                                                                          gsize                   height);
+GskVulkanImage *        gsk_vulkan_image_new_for_texture                (GdkVulkanContext       *context,
+                                                                         gsize                   width,
+                                                                         gsize                   height);
 
 GskTexture *            gsk_vulkan_image_download                       (GskVulkanImage         *self,
                                                                          GskVulkanUploader      *uploader);