Cleanup: sanatize namespaces in image engine.

Some files were missing namespaces and sometimes the closing comment of
namespaces were incorrectly placed. No functional changes.

source/blender/draw/engines/image/image_batches.hh

@@ -9,6 +9,8 @@
 
 #include "image_texture_info.hh"
 
+namespace blender::draw::image_engine {
+
 /** \brief Create GPUBatch for a IMAGE_ScreenSpaceTextureInfo. */
 class BatchUpdater {
   TextureInfo &info;
@@ -89,3 +91,5 @@ class BatchUpdater {
     }
   }
 };
+
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_buffer_cache.hh

@@ -13,6 +13,8 @@
 #include "IMB_imbuf.h"
 #include "IMB_imbuf_types.h"
 
+namespace blender::draw::image_engine {
+
 struct FloatImageBuffer {
   ImBuf *source_buffer = nullptr;
   ImBuf *float_buffer = nullptr;
@@ -62,7 +64,7 @@ struct FloatImageBuffer {
  */
 struct FloatBufferCache {
  private:
-  blender::Vector<FloatImageBuffer> cache_;
+  Vector<FloatImageBuffer> cache_;
 
  public:
   ImBuf *cached_float_buffer(ImBuf *image_buffer)
@@ -130,3 +132,5 @@ struct FloatBufferCache {
     cache_.clear();
   }
 };
+
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_engine.cc

@@ -128,7 +128,7 @@ class ImageEngine {
   {
     drawing_mode.draw_scene(vedata);
   }
-};  // namespace blender::draw::image_engine
+};
 
 /* -------------------------------------------------------------------- */
 /** \name Engine Callbacks

source/blender/draw/engines/image/image_instance_data.hh

@@ -19,6 +19,8 @@
 
 #include "DRW_render.h"
 
+namespace blender::draw::image_engine {
+
 /**
  * \brief max allowed textures to use by the ScreenSpaceDrawingMode.
  *
@@ -124,3 +126,5 @@ struct IMAGE_InstanceData {
     }
   }
 };
+
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_shader_params.hh

@@ -19,6 +19,8 @@
 
 #include "image_space.hh"
 
+namespace blender::draw::image_engine {
+
 struct ShaderParameters {
   int flags = 0;
   float shuffle[4];
@@ -40,3 +42,5 @@ struct ShaderParameters {
     space->get_shader_parameters(*this, image_buffer);
   }
 };
+
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_space.hh

@@ -7,6 +7,8 @@
 
 #pragma once
 
+namespace blender::draw::image_engine {
+
 struct ShaderParameters;
 
 /**
@@ -79,5 +81,6 @@ class AbstractSpaceAccessor {
   virtual void init_ss_to_texture_matrix(const ARegion *region,
                                          const float image_resolution[2],
                                          float r_uv_to_texture[4][4]) const = 0;
+};
 
-};  // namespace blender::draw::image_engine
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_texture_info.hh

@@ -13,6 +13,8 @@
 #include "GPU_batch.h"
 #include "GPU_texture.h"
 
+namespace blender::draw::image_engine {
+
 struct TextureInfo {
   /**
    * \brief does this texture need a full update.
@@ -82,3 +84,5 @@ struct TextureInfo {
                   top_right_region.y);
   }
 };
+
+}  // namespace blender::draw::image_engine

source/blender/draw/engines/image/image_usage.hh

@@ -7,6 +7,8 @@
 
 #pragma once
 
+namespace blender::draw::image_engine {
+
 /**
  * ImageUsage contains data of the image and image user to identify changes that require a rebuild
  * the texture slots.
@@ -47,3 +49,5 @@ struct ImageUsage {
     return !(*this == other);
   }
 };
+
+}  // namespace blender::draw::image_engine