Merge branch 'master' into KTX_supportKTX_support

1 files changed, 119 insertions, 0 deletions

diff --git a/source/blender/draw/engines/image/image_instance_data.hh b/source/blender/draw/engines/image/image_instance_data.hh
new file mode 100644
index 00000000000..1a7a20b8b9a
--- /dev/null
+++ b/source/blender/draw/engines/image/image_instance_data.hh
@@ -0,0 +1,119 @@
+/*
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Copyright 2021, Blender Foundation.
+ */
+
+/** \file
+ * \ingroup draw_engine
+ */
+
+#pragma once
+
+#include "image_batches.hh"
+#include "image_partial_updater.hh"
+#include "image_private.hh"
+#include "image_shader_params.hh"
+#include "image_texture_info.hh"
+#include "image_wrappers.hh"
+
+#include "DRW_render.h"
+
+/**
+ * \brief max allowed textures to use by the ScreenSpaceDrawingMode.
+ *
+ * 4 textures are used to reduce uploading screen space textures when translating the image.
+ */
+constexpr int SCREEN_SPACE_DRAWING_MODE_TEXTURE_LEN = 4;
+
+struct IMAGE_InstanceData {
+  struct Image *image;
+
+  PartialImageUpdater partial_update;
+
+  struct DRWView *view;
+  ShaderParameters sh_params;
+  struct {
+    /**
+     * \brief should we perform tiled drawing (wrap repeat).
+     *
+     * Option is true when image is capable of tile drawing (image is not tile) and the tiled
+     * option is set in the space.
+     */
+    bool do_tile_drawing : 1;
+  } flags;
+
+  struct {
+    DRWPass *image_pass;
+    DRWPass *depth_pass;
+  } passes;
+
+  /** \brief Transform matrix to convert a normalized screen space coordinates to texture space. */
+  float ss_to_texture[4][4];
+  TextureInfo texture_infos[SCREEN_SPACE_DRAWING_MODE_TEXTURE_LEN];
+
+ public:
+  void clear_dirty_flag()
+  {
+    reset_dirty_flag(false);
+  }
+  void mark_all_texture_slots_dirty()
+  {
+    reset_dirty_flag(true);
+  }
+
+  void update_gpu_texture_allocations()
+  {
+    for (int i = 0; i < SCREEN_SPACE_DRAWING_MODE_TEXTURE_LEN; i++) {
+      TextureInfo &info = texture_infos[i];
+      const bool is_allocated = info.texture != nullptr;
+      const bool is_visible = info.visible;
+      const bool should_be_freed = !is_visible && is_allocated;
+      const bool should_be_created = is_visible && !is_allocated;
+
+      if (should_be_freed) {
+        GPU_texture_free(info.texture);
+        info.texture = nullptr;
+      }
+
+      if (should_be_created) {
+        DRW_texture_ensure_fullscreen_2d(
+            &info.texture, GPU_RGBA16F, static_cast<DRWTextureFlag>(0));
+      }
+      info.dirty |= should_be_created;
+    }
+  }
+
+  void update_batches()
+  {
+    for (int i = 0; i < SCREEN_SPACE_DRAWING_MODE_TEXTURE_LEN; i++) {
+      TextureInfo &info = texture_infos[i];
+      if (!info.dirty) {
+        continue;
+      }
+      BatchUpdater batch_updater(info);
+      batch_updater.update_batch();
+    }
+  }
+
+ private:
+  /** \brief Set dirty flag of all texture slots to the given value. */
+  void reset_dirty_flag(bool new_value)
+  {
+    for (int i = 0; i < SCREEN_SPACE_DRAWING_MODE_TEXTURE_LEN; i++) {
+      texture_infos[i].dirty = new_value;
+    }
+  }
+};