Refactor high quality texture import

* Only two texture import modes for low/high quality now:
  * S3TC/BPTC
  * ETC2/ASTC
* Makes sense given this is the general preferred and most compatible combination in most platforms.
* Removed lossy_quality from VRAM texture compression options. It was unused everywhere.
* Added a new "high_quality" option to texture import. When enabled, it uses BPTC/ASTC (BC7/ASTC4x4) instead of S3TC/ETC2 (DXT1-5/ETC2,ETCA).
* Changed MacOS export settings so required texture formats depend on the architecture selected.

This solves the following problems:

* Makes it simpler to import textures as high quality, without having to worry about the specific format used.
* As the editor can now run on platforms such as web, Mac OS with Apple Silicion and Android, it should no longer be assumed that S3TC/BPTC is available by default for it.

2 files changed, 13 insertions, 2 deletions

diff --git a/editor/export/editor_export.cpp b/editor/export/editor_export.cpp
index 4900ced2e4..bc429e1111 100644
--- a/editor/export/editor_export.cpp
+++ b/editor/export/editor_export.cpp
@@ -129,10 +129,20 @@ void EditorExport::add_export_preset(const Ref<EditorExportPreset> &p_preset, in
 }
 
 String EditorExportPlatform::test_etc2() const {
-	const bool etc2_supported = GLOBAL_GET("rendering/textures/vram_compression/import_etc2");
+	const bool etc2_supported = GLOBAL_GET("rendering/textures/vram_compression/import_etc2_astc");
 
 	if (!etc2_supported) {
-		return TTR("Target platform requires 'ETC2' texture compression. Enable 'Import Etc 2' in Project Settings.");
+		return TTR("Target platform requires 'ETC2/ASTC' texture compression. Enable 'Import ETC2 ASTC' in Project Settings.");
+	}
+
+	return String();
+}
+
+String EditorExportPlatform::test_bc() const {
+	const bool bc_supported = GLOBAL_GET("rendering/textures/vram_compression/import_s3tc_bptc");
+
+	if (!bc_supported) {
+		return TTR("Target platform requires 'S3TC/BPTC' texture compression. Enable 'Import S3TC BPTC' in Project Settings.");
 	}
 
 	return String();
diff --git a/editor/export/editor_export_platform.h b/editor/export/editor_export_platform.h
index 3b4e92c9bd..05d985eb6a 100644
--- a/editor/export/editor_export_platform.h
+++ b/editor/export/editor_export_platform.h
@@ -229,6 +229,7 @@ public:
 	virtual Ref<Texture2D> get_run_icon() const { return get_logo(); }
 
 	String test_etc2() const;
+	String test_bc() const;
 	bool can_export(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const;
 	virtual bool has_valid_export_configuration(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const = 0;
 	virtual bool has_valid_project_configuration(const Ref<EditorExportPreset> &p_preset, String &r_error) const = 0;