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.

5 files changed, 84 insertions, 0 deletions

diff --git a/drivers/gles3/storage/config.cpp b/drivers/gles3/storage/config.cpp
index d1a83e6851..77a4553c76 100644
--- a/drivers/gles3/storage/config.cpp
+++ b/drivers/gles3/storage/config.cpp
@@ -65,6 +65,10 @@ Config::Config() {
 	}
 
 	bptc_supported = extensions.has("GL_ARB_texture_compression_bptc") || extensions.has("EXT_texture_compression_bptc");
+	astc_supported = extensions.has("GL_KHR_texture_compression_astc") || extensions.has("GL_OES_texture_compression_astc") || extensions.has("GL_KHR_texture_compression_astc_ldr") || extensions.has("GL_KHR_texture_compression_astc_hdr");
+	astc_hdr_supported = extensions.has("GL_KHR_texture_compression_astc_ldr");
+	astc_layered_supported = extensions.has("GL_KHR_texture_compression_astc_sliced_3d");
+
 #ifdef GLES_OVER_GL
 	float_texture_supported = true;
 	etc2_supported = false;
diff --git a/drivers/gles3/storage/config.h b/drivers/gles3/storage/config.h
index 8399502675..623f0442bd 100644
--- a/drivers/gles3/storage/config.h
+++ b/drivers/gles3/storage/config.h
@@ -77,6 +77,9 @@ public:
 	bool rgtc_supported = false;
 	bool bptc_supported = false;
 	bool etc2_supported = false;
+	bool astc_supported = false;
+	bool astc_hdr_supported = false;
+	bool astc_layered_supported = false;
 
 	bool force_vertex_shading = false;
 
diff --git a/drivers/gles3/storage/texture_storage.cpp b/drivers/gles3/storage/texture_storage.cpp
index 67526bc003..97698af0a0 100644
--- a/drivers/gles3/storage/texture_storage.cpp
+++ b/drivers/gles3/storage/texture_storage.cpp
@@ -594,6 +594,50 @@ Ref<Image> TextureStorage::_get_gl_image_and_format(const Ref<Image> &p_image, I
 			}
 			decompress_ra_to_rg = true;
 		} break;
+		case Image::FORMAT_ASTC_4x4: {
+			if (config->astc_supported) {
+				r_gl_internal_format = _EXT_COMPRESSED_RGBA_ASTC_4x4_KHR;
+				r_gl_format = GL_RGBA;
+				r_gl_type = GL_UNSIGNED_BYTE;
+				r_compressed = true;
+
+			} else {
+				need_decompress = true;
+			}
+		} break;
+		case Image::FORMAT_ASTC_4x4_HDR: {
+			if (config->astc_hdr_supported) {
+				r_gl_internal_format = _EXT_COMPRESSED_RGBA_ASTC_4x4_KHR;
+				r_gl_format = GL_RGBA;
+				r_gl_type = GL_UNSIGNED_BYTE;
+				r_compressed = true;
+
+			} else {
+				need_decompress = true;
+			}
+		} break;
+		case Image::FORMAT_ASTC_8x8: {
+			if (config->astc_supported) {
+				r_gl_internal_format = _EXT_COMPRESSED_RGBA_ASTC_8x8_KHR;
+				r_gl_format = GL_RGBA;
+				r_gl_type = GL_UNSIGNED_BYTE;
+				r_compressed = true;
+
+			} else {
+				need_decompress = true;
+			}
+		} break;
+		case Image::FORMAT_ASTC_8x8_HDR: {
+			if (config->astc_hdr_supported) {
+				r_gl_internal_format = _EXT_COMPRESSED_RGBA_ASTC_8x8_KHR;
+				r_gl_format = GL_RGBA;
+				r_gl_type = GL_UNSIGNED_BYTE;
+				r_compressed = true;
+
+			} else {
+				need_decompress = true;
+			}
+		} break;
 		default: {
 			ERR_FAIL_V_MSG(Ref<Image>(), "Image Format: " + itos(p_format) + " is not supported by the OpenGL3 Renderer");
 		}
diff --git a/drivers/gles3/storage/texture_storage.h b/drivers/gles3/storage/texture_storage.h
index 9d3f407226..522be64d35 100644
--- a/drivers/gles3/storage/texture_storage.h
+++ b/drivers/gles3/storage/texture_storage.h
@@ -84,6 +84,36 @@ namespace GLES3 {
 #define _EXT_COMPRESSED_RGBA8_ETC2_EAC 0x9278
 #define _EXT_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC 0x9279
 
+#define _EXT_COMPRESSED_RGBA_ASTC_4x4_KHR 0x93B0
+#define _EXT_COMPRESSED_RGBA_ASTC_5x4_KHR 0x93B1
+#define _EXT_COMPRESSED_RGBA_ASTC_5x5_KHR 0x93B2
+#define _EXT_COMPRESSED_RGBA_ASTC_6x5_KHR 0x93B3
+#define _EXT_COMPRESSED_RGBA_ASTC_6x6_KHR 0x93B4
+#define _EXT_COMPRESSED_RGBA_ASTC_8x5_KHR 0x93B5
+#define _EXT_COMPRESSED_RGBA_ASTC_8x6_KHR 0x93B6
+#define _EXT_COMPRESSED_RGBA_ASTC_8x8_KHR 0x93B7
+#define _EXT_COMPRESSED_RGBA_ASTC_10x5_KHR 0x93B8
+#define _EXT_COMPRESSED_RGBA_ASTC_10x6_KHR 0x93B9
+#define _EXT_COMPRESSED_RGBA_ASTC_10x8_KHR 0x93BA
+#define _EXT_COMPRESSED_RGBA_ASTC_10x10_KHR 0x93BB
+#define _EXT_COMPRESSED_RGBA_ASTC_12x10_KHR 0x93BC
+#define _EXT_COMPRESSED_RGBA_ASTC_12x12_KHR 0x93BD
+
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR 0x93D0
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR 0x93D1
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR 0x93D2
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR 0x93D3
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR 0x93D4
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR 0x93D5
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR 0x93D6
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR 0x93D7
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR 0x93D8
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR 0x93D9
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR 0x93DA
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR 0x93DB
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR 0x93DC
+#define _EXT_COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR 0x93DD
+
 #define _GL_TEXTURE_EXTERNAL_OES 0x8D65
 
 #define _EXT_TEXTURE_CUBE_MAP_SEAMLESS 0x884F
diff --git a/drivers/gles3/storage/utilities.cpp b/drivers/gles3/storage/utilities.cpp
index e72240c69b..30c3e61ee7 100644
--- a/drivers/gles3/storage/utilities.cpp
+++ b/drivers/gles3/storage/utilities.cpp
@@ -309,6 +309,9 @@ bool Utilities::has_os_feature(const String &p_feature) const {
 	if (p_feature == "bptc") {
 		return config->bptc_supported;
 	}
+	if (p_feature == "astc") {
+		return config->astc_supported;
+	}
 
 	if (p_feature == "etc" || p_feature == "etc2") {
 		return config->etc2_supported;