Fix T81206: Do not limit gl texture size in image editor

This patch will show textures in the image editor with the maximum
available resolution determined by the GPU Hardware/Driver.
Currently the size is limited by the user preference texture size limit.

An image user can set the `IMA_SHOW_MAX_RESOLUTION` flag to request
gpu textures in the max supported resolution. When this flag isn't
set the gpu texture is limited by the user preference setting.

When the gl resolution limit is disabled the GPU texture is always
created for the max supported resolution.

Reviewed By: Clément Foucault

Maniphest Tasks: T81206

Differential Revision: https://developer.blender.org/D9160

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_image_types.h b/source/blender/makesdna/DNA_image_types.h
index b1d752d6197..22408687daf 100644
--- a/source/blender/makesdna/DNA_image_types.h
+++ b/source/blender/makesdna/DNA_image_types.h
@@ -119,6 +119,10 @@ typedef struct ImageTile {
 /* #define IMA_UNUSED_2         (1 << 2) */
 #define IMA_NEED_FRAME_RECALC (1 << 3)
 #define IMA_SHOW_STEREO (1 << 4)
+/* Do not limit the resolution by the limit texture size option in the user preferences.
+ * Images in the image editor or used as a backdrop are always shown using the maximum
+ * possible resolution. */
+#define IMA_SHOW_MAX_RESOLUTION (1 << 5)
 
 /* Used to get the correct gpu texture from an Image datablock. */
 typedef enum eGPUTextureTarget {
@@ -229,6 +233,8 @@ enum {
   IMA_GPU_PARTIAL_REFRESH = (1 << 1),
   /** All mipmap levels in OpenGL texture set? */
   IMA_GPU_MIPMAP_COMPLETE = (1 << 2),
+  /** Current texture resolution won't be limited by the GL Texture Limit user preference. */
+  IMA_GPU_MAX_RESOLUTION = (1 << 3),
 };
 
 /* Image.source, where the image comes from */