Revert "Implement loading DDS textures at run-time"

This reverts commit 34ab1c8a36e61b386c210fb908b9ebfa86513149.

9 files changed, 357 insertions, 506 deletions

diff --git a/core/io/image.cpp b/core/io/image.cpp
index 3ca39f98c0..ce2f47371a 100644
--- a/core/io/image.cpp
+++ b/core/io/image.cpp
@@ -3017,7 +3017,6 @@ ImageMemLoadFunc Image::_webp_mem_loader_func = nullptr;
 ImageMemLoadFunc Image::_tga_mem_loader_func = nullptr;
 ImageMemLoadFunc Image::_bmp_mem_loader_func = nullptr;
 ScalableImageMemLoadFunc Image::_svg_scalable_mem_loader_func = nullptr;
-ImageMemLoadFunc Image::_dds_mem_loader_func = nullptr;
 ImageMemLoadFunc Image::_ktx_mem_loader_func = nullptr;
 
 void (*Image::_image_compress_bc_func)(Image *, Image::UsedChannels) = nullptr;
@@ -3490,7 +3489,6 @@ void Image::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("load_webp_from_buffer", "buffer"), &Image::load_webp_from_buffer);
 	ClassDB::bind_method(D_METHOD("load_tga_from_buffer", "buffer"), &Image::load_tga_from_buffer);
 	ClassDB::bind_method(D_METHOD("load_bmp_from_buffer", "buffer"), &Image::load_bmp_from_buffer);
-	ClassDB::bind_method(D_METHOD("load_dds_from_buffer", "buffer"), &Image::load_dds_from_buffer);
 	ClassDB::bind_method(D_METHOD("load_ktx_from_buffer", "buffer"), &Image::load_ktx_from_buffer);
 
 	ClassDB::bind_method(D_METHOD("load_svg_from_buffer", "buffer", "scale"), &Image::load_svg_from_buffer, DEFVAL(1.0));
@@ -3867,14 +3865,6 @@ Error Image::load_svg_from_string(const String &p_svg_str, float scale) {
 	return load_svg_from_buffer(p_svg_str.to_utf8_buffer(), scale);
 }
 
-Error Image::load_dds_from_buffer(const Vector<uint8_t> &p_array) {
-	ERR_FAIL_NULL_V_MSG(
-			_dds_mem_loader_func,
-			ERR_UNAVAILABLE,
-			"The DDS module isn't enabled. Recompile the Godot editor or export template binary with the `module_dds_enabled=yes` SCons option.");
-	return _load_from_buffer(p_array, _dds_mem_loader_func);
-}
-
 Error Image::load_ktx_from_buffer(const Vector<uint8_t> &p_array) {
 	ERR_FAIL_NULL_V_MSG(
 			_ktx_mem_loader_func,
diff --git a/core/io/image.h b/core/io/image.h
index cb7c6bff52..a21d05187b 100644
--- a/core/io/image.h
+++ b/core/io/image.h
@@ -150,7 +150,6 @@ public:
 	static ImageMemLoadFunc _tga_mem_loader_func;
 	static ImageMemLoadFunc _bmp_mem_loader_func;
 	static ScalableImageMemLoadFunc _svg_scalable_mem_loader_func;
-	static ImageMemLoadFunc _dds_mem_loader_func;
 	static ImageMemLoadFunc _ktx_mem_loader_func;
 
 	static void (*_image_compress_bc_func)(Image *, UsedChannels p_channels);
@@ -404,7 +403,6 @@ public:
 	Error load_webp_from_buffer(const Vector<uint8_t> &p_array);
 	Error load_tga_from_buffer(const Vector<uint8_t> &p_array);
 	Error load_bmp_from_buffer(const Vector<uint8_t> &p_array);
-	Error load_dds_from_buffer(const Vector<uint8_t> &p_array);
 	Error load_ktx_from_buffer(const Vector<uint8_t> &p_array);
 
 	Error load_svg_from_buffer(const Vector<uint8_t> &p_array, float scale = 1.0);
diff --git a/doc/classes/Image.xml b/doc/classes/Image.xml
index 6451062fc5..5f1f9e6c18 100644
--- a/doc/classes/Image.xml
+++ b/doc/classes/Image.xml
@@ -312,13 +312,6 @@
 				[b]Note:[/b] Godot's BMP module doesn't support 16-bit per pixel images. Only 1-bit, 4-bit, 8-bit, 24-bit, and 32-bit per pixel images are supported.
 			</description>
 		</method>
-		<method name="load_dds_from_buffer">
-			<return type="int" enum="Error" />
-			<param index="0" name="buffer" type="PackedByteArray" />
-			<description>
-				Loads an image from the binary contents of a DDS file.
-			</description>
-		</method>
 		<method name="load_from_file" qualifiers="static">
 			<return type="Image" />
 			<param index="0" name="path" type="String" />
diff --git a/modules/dds/image_loader_dds.cpp b/modules/dds/image_loader_dds.cpp
deleted file mode 100644
index d661f6664a..0000000000
--- a/modules/dds/image_loader_dds.cpp
+++ /dev/null
@@ -1,421 +0,0 @@
-/**************************************************************************/
-/*  image_loader_dds.cpp                                                  */
-/**************************************************************************/
-/*                         This file is part of:                          */
-/*                             GODOT ENGINE                               */
-/*                        https://godotengine.org                         */
-/**************************************************************************/
-/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
-/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
-/*                                                                        */
-/* Permission is hereby granted, free of charge, to any person obtaining  */
-/* a copy of this software and associated documentation files (the        */
-/* "Software"), to deal in the Software without restriction, including    */
-/* without limitation the rights to use, copy, modify, merge, publish,    */
-/* distribute, sublicense, and/or sell copies of the Software, and to     */
-/* permit persons to whom the Software is furnished to do so, subject to  */
-/* the following conditions:                                              */
-/*                                                                        */
-/* The above copyright notice and this permission notice shall be         */
-/* included in all copies or substantial portions of the Software.        */
-/*                                                                        */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
-/**************************************************************************/
-
-#include "image_loader_dds.h"
-
-#include "core/os/os.h"
-
-#include "core/io/file_access.h"
-#include "core/io/file_access_memory.h"
-
-#include <string.h>
-
-#define PF_FOURCC(s) ((uint32_t)(((s)[3] << 24U) | ((s)[2] << 16U) | ((s)[1] << 8U) | ((s)[0])))
-
-// Reference: https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dds-header
-
-enum {
-	DDS_MAGIC = 0x20534444,
-	DDSD_PITCH = 0x00000008,
-	DDSD_LINEARSIZE = 0x00080000,
-	DDSD_MIPMAPCOUNT = 0x00020000,
-	DDPF_FOURCC = 0x00000004,
-	DDPF_ALPHAPIXELS = 0x00000001,
-	DDPF_INDEXED = 0x00000020,
-	DDPF_RGB = 0x00000040,
-};
-
-enum DDSFormat {
-	DDS_DXT1,
-	DDS_DXT3,
-	DDS_DXT5,
-	DDS_ATI1,
-	DDS_ATI2,
-	DDS_A2XY,
-	DDS_BGRA8,
-	DDS_BGR8,
-	DDS_RGBA8, //flipped in dds
-	DDS_RGB8, //flipped in dds
-	DDS_BGR5A1,
-	DDS_BGR565,
-	DDS_BGR10A2,
-	DDS_LUMINANCE,
-	DDS_LUMINANCE_ALPHA,
-	DDS_MAX
-};
-
-struct DDSFormatInfo {
-	const char *name = nullptr;
-	bool compressed = false;
-	bool palette = false;
-	uint32_t divisor = 0;
-	uint32_t block_size = 0;
-	Image::Format format = Image::Format::FORMAT_BPTC_RGBA;
-};
-
-static const DDSFormatInfo dds_format_info[DDS_MAX] = {
-	{ "DXT1/BC1", true, false, 4, 8, Image::FORMAT_DXT1 },
-	{ "DXT3/BC2", true, false, 4, 16, Image::FORMAT_DXT3 },
-	{ "DXT5/BC3", true, false, 4, 16, Image::FORMAT_DXT5 },
-	{ "ATI1/BC4", true, false, 4, 8, Image::FORMAT_RGTC_R },
-	{ "ATI2/3DC/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
-	{ "A2XY/DXN/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
-	{ "BGRA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
-	{ "BGR8", false, false, 1, 3, Image::FORMAT_RGB8 },
-	{ "RGBA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
-	{ "RGB8", false, false, 1, 3, Image::FORMAT_RGB8 },
-	{ "BGR5A1", false, false, 1, 2, Image::FORMAT_RGBA8 },
-	{ "BGR565", false, false, 1, 2, Image::FORMAT_RGB8 },
-	{ "BGR10A2", false, false, 1, 4, Image::FORMAT_RGBA8 },
-	{ "GRAYSCALE", false, false, 1, 1, Image::FORMAT_L8 },
-	{ "GRAYSCALE_ALPHA", false, false, 1, 2, Image::FORMAT_LA8 }
-};
-
-static Ref<Image> _dds_mem_loader_func(const uint8_t *p_buffer, int p_buffer_len) {
-	Ref<FileAccessMemory> memfile;
-	memfile.instantiate();
-	Error open_memfile_error = memfile->open_custom(p_buffer, p_buffer_len);
-	ERR_FAIL_COND_V_MSG(open_memfile_error, Ref<Image>(), "Could not create memfile for DDS image buffer.");
-
-	Ref<Image> img;
-	img.instantiate();
-	Error load_error = ImageLoaderDDS().load_image(img, memfile, false, 1.0f);
-	ERR_FAIL_COND_V_MSG(load_error, Ref<Image>(), "Failed to load DDS image.");
-	return img;
-}
-
-Error ImageLoaderDDS::load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale) {
-	uint32_t magic = f->get_32();
-	uint32_t hsize = f->get_32();
-	uint32_t flags = f->get_32();
-	uint32_t height = f->get_32();
-	uint32_t width = f->get_32();
-	uint32_t pitch = f->get_32();
-	/* uint32_t depth = */ f->get_32();
-	uint32_t mipmaps = f->get_32();
-
-	//skip 11
-	for (int i = 0; i < 11; i++) {
-		f->get_32();
-	}
-
-	//validate
-
-	// We don't check DDSD_CAPS or DDSD_PIXELFORMAT, as they're mandatory when writing,
-	// but non-mandatory when reading (as some writers don't set them)...
-	if (magic != DDS_MAGIC || hsize != 124) {
-		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Invalid or unsupported DDS texture file '" + f->get_path() + "'.");
-	}
-
-	/* uint32_t format_size = */ f->get_32();
-	uint32_t format_flags = f->get_32();
-	uint32_t format_fourcc = f->get_32();
-	uint32_t format_rgb_bits = f->get_32();
-	uint32_t format_red_mask = f->get_32();
-	uint32_t format_green_mask = f->get_32();
-	uint32_t format_blue_mask = f->get_32();
-	uint32_t format_alpha_mask = f->get_32();
-
-	/* uint32_t caps_1 = */ f->get_32();
-	/* uint32_t caps_2 = */ f->get_32();
-	/* uint32_t caps_ddsx = */ f->get_32();
-
-	//reserved skip
-	f->get_32();
-	f->get_32();
-
-	/*
-	print_line("DDS width: "+itos(width));
-	print_line("DDS height: "+itos(height));
-	print_line("DDS mipmaps: "+itos(mipmaps));
-
-	printf("fourcc: %x fflags: %x, rgbbits: %x, fsize: %x\n",format_fourcc,format_flags,format_rgb_bits,format_size);
-	printf("rmask: %x gmask: %x, bmask: %x, amask: %x\n",format_red_mask,format_green_mask,format_blue_mask,format_alpha_mask);
-	*/
-
-	//must avoid this later
-	while (f->get_position() < 128) {
-		f->get_8();
-	}
-
-	DDSFormat dds_format;
-
-	if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT1")) {
-		dds_format = DDS_DXT1;
-	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT3")) {
-		dds_format = DDS_DXT3;
-
-	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT5")) {
-		dds_format = DDS_DXT5;
-	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("ATI1")) {
-		dds_format = DDS_ATI1;
-	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("ATI2")) {
-		dds_format = DDS_ATI2;
-	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("A2XY")) {
-		dds_format = DDS_A2XY;
-
-	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0xff0000 && format_green_mask == 0xff00 && format_blue_mask == 0xff && format_alpha_mask == 0xff000000) {
-		dds_format = DDS_BGRA8;
-	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 24 && format_red_mask == 0xff0000 && format_green_mask == 0xff00 && format_blue_mask == 0xff) {
-		dds_format = DDS_BGR8;
-	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0xff && format_green_mask == 0xff00 && format_blue_mask == 0xff0000 && format_alpha_mask == 0xff000000) {
-		dds_format = DDS_RGBA8;
-	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 24 && format_red_mask == 0xff && format_green_mask == 0xff00 && format_blue_mask == 0xff0000) {
-		dds_format = DDS_RGB8;
-
-	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 16 && format_red_mask == 0x00007c00 && format_green_mask == 0x000003e0 && format_blue_mask == 0x0000001f && format_alpha_mask == 0x00008000) {
-		dds_format = DDS_BGR5A1;
-	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0x3ff00000 && format_green_mask == 0xffc00 && format_blue_mask == 0x3ff && format_alpha_mask == 0xc0000000) {
-		dds_format = DDS_BGR10A2;
-	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 16 && format_red_mask == 0x0000f800 && format_green_mask == 0x000007e0 && format_blue_mask == 0x0000001f) {
-		dds_format = DDS_BGR565;
-	} else if (!(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 8 && format_red_mask == 0xff) {
-		dds_format = DDS_LUMINANCE;
-	} else if ((format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 16 && format_red_mask == 0xff && format_alpha_mask == 0xff00) {
-		dds_format = DDS_LUMINANCE_ALPHA;
-	} else if (format_flags & DDPF_INDEXED && format_rgb_bits == 8) {
-		dds_format = DDS_BGR565;
-	} else {
-		//printf("unrecognized fourcc %x format_flags: %x - rgbbits %i - red_mask %x green mask %x blue mask %x alpha mask %x\n", format_fourcc, format_flags, format_rgb_bits, format_red_mask, format_green_mask, format_blue_mask, format_alpha_mask);
-		ERR_FAIL_V_MSG(ERR_FILE_CORRUPT, "Unrecognized or unsupported color layout in DDS '" + f->get_path() + "'.");
-	}
-
-	if (!(flags & DDSD_MIPMAPCOUNT)) {
-		mipmaps = 1;
-	}
-
-	Vector<uint8_t> src_data;
-
-	const DDSFormatInfo &info = dds_format_info[dds_format];
-	uint32_t w = width;
-	uint32_t h = height;
-
-	if (info.compressed) {
-		//compressed bc
-
-		uint32_t size = MAX(info.divisor, w) / info.divisor * MAX(info.divisor, h) / info.divisor * info.block_size;
-		ERR_FAIL_COND_V(size != pitch, ERR_FILE_CORRUPT);
-		ERR_FAIL_COND_V(!(flags & DDSD_LINEARSIZE), ERR_FILE_CORRUPT);
-
-		for (uint32_t i = 1; i < mipmaps; i++) {
-			w = MAX(1u, w >> 1);
-			h = MAX(1u, h >> 1);
-			uint32_t bsize = MAX(info.divisor, w) / info.divisor * MAX(info.divisor, h) / info.divisor * info.block_size;
-			//printf("%i x %i - block: %i\n",w,h,bsize);
-			size += bsize;
-		}
-
-		src_data.resize(size);
-		uint8_t *wb = src_data.ptrw();
-		f->get_buffer(wb, size);
-
-	} else if (info.palette) {
-		//indexed
-		ERR_FAIL_COND_V(!(flags & DDSD_PITCH), ERR_FILE_CORRUPT);
-		ERR_FAIL_COND_V(format_rgb_bits != 8, ERR_FILE_CORRUPT);
-
-		uint32_t size = pitch * height;
-		ERR_FAIL_COND_V(size != width * height * info.block_size, ERR_FILE_CORRUPT);
-
-		uint8_t palette[256 * 4];
-		f->get_buffer(palette, 256 * 4);
-
-		int colsize = 3;
-		for (int i = 0; i < 256; i++) {
-			if (palette[i * 4 + 3] < 255) {
-				colsize = 4;
-			}
-		}
-
-		int w2 = width;
-		int h2 = height;
-
-		for (uint32_t i = 1; i < mipmaps; i++) {
-			w2 = (w2 + 1) >> 1;
-			h2 = (h2 + 1) >> 1;
-			size += w2 * h2 * info.block_size;
-		}
-
-		src_data.resize(size + 256 * colsize);
-		uint8_t *wb = src_data.ptrw();
-		f->get_buffer(wb, size);
-
-		for (int i = 0; i < 256; i++) {
-			int dst_ofs = size + i * colsize;
-			int src_ofs = i * 4;
-			wb[dst_ofs + 0] = palette[src_ofs + 2];
-			wb[dst_ofs + 1] = palette[src_ofs + 1];
-			wb[dst_ofs + 2] = palette[src_ofs + 0];
-			if (colsize == 4) {
-				wb[dst_ofs + 3] = palette[src_ofs + 3];
-			}
-		}
-	} else {
-		//uncompressed generic...
-
-		uint32_t size = width * height * info.block_size;
-
-		for (uint32_t i = 1; i < mipmaps; i++) {
-			w = (w + 1) >> 1;
-			h = (h + 1) >> 1;
-			size += w * h * info.block_size;
-		}
-
-		if (dds_format == DDS_BGR565) {
-			size = size * 3 / 2;
-		} else if (dds_format == DDS_BGR5A1) {
-			size = size * 2;
-		}
-
-		src_data.resize(size);
-		uint8_t *wb = src_data.ptrw();
-		f->get_buffer(wb, size);
-
-		switch (dds_format) {
-			case DDS_BGR5A1: {
-				// TO RGBA
-				int colcount = size / 4;
-
-				for (int i = colcount - 1; i >= 0; i--) {
-					int src_ofs = i * 2;
-					int dst_ofs = i * 4;
-
-					uint8_t a = wb[src_ofs + 1] & 0x80;
-					uint8_t b = wb[src_ofs] & 0x1F;
-					uint8_t g = (wb[src_ofs] >> 5) | ((wb[src_ofs + 1] & 0x3) << 3);
-					uint8_t r = (wb[src_ofs + 1] >> 2) & 0x1F;
-					wb[dst_ofs + 0] = r << 3;
-					wb[dst_ofs + 1] = g << 3;
-					wb[dst_ofs + 2] = b << 3;
-					wb[dst_ofs + 3] = a ? 255 : 0;
-				}
-			} break;
-			case DDS_BGR565: {
-				int colcount = size / 3;
-
-				for (int i = colcount - 1; i >= 0; i--) {
-					int src_ofs = i * 2;
-					int dst_ofs = i * 3;
-
-					uint8_t b = wb[src_ofs] & 0x1F;
-					uint8_t g = (wb[src_ofs] >> 5) | ((wb[src_ofs + 1] & 0x7) << 3);
-					uint8_t r = wb[src_ofs + 1] >> 3;
-					wb[dst_ofs + 0] = r << 3;
-					wb[dst_ofs + 1] = g << 2;
-					wb[dst_ofs + 2] = b << 3; //b<<3;
-				}
-
-			} break;
-			case DDS_BGR10A2: {
-				// TO RGBA
-				int colcount = size / 4;
-
-				for (int i = colcount - 1; i >= 0; i--) {
-					int ofs = i * 4;
-
-					uint32_t w32 = uint32_t(wb[ofs + 0]) | (uint32_t(wb[ofs + 1]) << 8) | (uint32_t(wb[ofs + 2]) << 16) | (uint32_t(wb[ofs + 3]) << 24);
-
-					uint8_t a = (w32 & 0xc0000000) >> 24;
-					uint8_t r = (w32 & 0x3ff00000) >> 22;
-					uint8_t g = (w32 & 0xffc00) >> 12;
-					uint8_t b = (w32 & 0x3ff) >> 2;
-
-					wb[ofs + 0] = r;
-					wb[ofs + 1] = g;
-					wb[ofs + 2] = b;
-					wb[ofs + 3] = a == 0xc0 ? 255 : a; //0xc0 should be opaque
-				}
-			} break;
-			case DDS_BGRA8: {
-				int colcount = size / 4;
-
-				for (int i = 0; i < colcount; i++) {
-					SWAP(wb[i * 4 + 0], wb[i * 4 + 2]);
-				}
-
-			} break;
-			case DDS_BGR8: {
-				int colcount = size / 3;
-
-				for (int i = 0; i < colcount; i++) {
-					SWAP(wb[i * 3 + 0], wb[i * 3 + 2]);
-				}
-			} break;
-			case DDS_RGBA8: {
-				/* do nothing either
-				int colcount = size/4;
-
-				for(int i=0;i<colcount;i++) {
-					uint8_t r = wb[i*4+1];
-					uint8_t g = wb[i*4+2];
-					uint8_t b = wb[i*4+3];
-					uint8_t a = wb[i*4+0];
-
-					wb[i*4+0]=r;
-					wb[i*4+1]=g;
-					wb[i*4+2]=b;
-					wb[i*4+3]=a;
-				}
-				*/
-			} break;
-			case DDS_RGB8: {
-				// do nothing
-				/*
-				int colcount = size/3;
-
-				for(int i=0;i<colcount;i++) {
-					SWAP( wb[i*3+0],wb[i*3+2] );
-				}*/
-			} break;
-			case DDS_LUMINANCE: {
-				// do nothing i guess?
-
-			} break;
-			case DDS_LUMINANCE_ALPHA: {
-				// do nothing i guess?
-
-			} break;
-
-			default: {
-			}
-		}
-	}
-
-	p_image->set_data(width, height, mipmaps - 1, info.format, src_data);
-	return OK;
-}
-
-ImageLoaderDDS::ImageLoaderDDS() {
-	Image::_dds_mem_loader_func = _dds_mem_loader_func;
-}
-
-void ImageLoaderDDS::get_recognized_extensions(List<String> *p_extensions) const {
-	p_extensions->push_back("dds");
-}
diff --git a/modules/dds/image_loader_dds.h b/modules/dds/image_loader_dds.h
deleted file mode 100644
index 81cfd43551..0000000000
--- a/modules/dds/image_loader_dds.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/**************************************************************************/
-/*  image_loader_dds.h                                                    */
-/**************************************************************************/
-/*                         This file is part of:                          */
-/*                             GODOT ENGINE                               */
-/*                        https://godotengine.org                         */
-/**************************************************************************/
-/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
-/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
-/*                                                                        */
-/* Permission is hereby granted, free of charge, to any person obtaining  */
-/* a copy of this software and associated documentation files (the        */
-/* "Software"), to deal in the Software without restriction, including    */
-/* without limitation the rights to use, copy, modify, merge, publish,    */
-/* distribute, sublicense, and/or sell copies of the Software, and to     */
-/* permit persons to whom the Software is furnished to do so, subject to  */
-/* the following conditions:                                              */
-/*                                                                        */
-/* The above copyright notice and this permission notice shall be         */
-/* included in all copies or substantial portions of the Software.        */
-/*                                                                        */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
-/**************************************************************************/
-
-#ifndef IMAGE_LOADER_DDS_H
-#define IMAGE_LOADER_DDS_H
-
-#include "core/io/image_loader.h"
-
-class ImageLoaderDDS : public ImageFormatLoader {
-public:
-	virtual Error load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale);
-	virtual void get_recognized_extensions(List<String> *p_extensions) const;
-	ImageLoaderDDS();
-};
-
-#endif // IMAGE_LOADER_DDS_H
diff --git a/modules/dds/register_types.cpp b/modules/dds/register_types.cpp
index b4d406eda9..d336269eb3 100644
--- a/modules/dds/register_types.cpp
+++ b/modules/dds/register_types.cpp
@@ -30,11 +30,9 @@
 
 #include "register_types.h"
 
-#include "image_loader_dds.h"
 #include "texture_loader_dds.h"
 
 static Ref<ResourceFormatDDS> resource_loader_dds;
-static Ref<ImageLoaderDDS> image_loader_dds;
 
 void initialize_dds_module(ModuleInitializationLevel p_level) {
 	if (p_level != MODULE_INITIALIZATION_LEVEL_SCENE) {
@@ -43,9 +41,6 @@ void initialize_dds_module(ModuleInitializationLevel p_level) {
 
 	resource_loader_dds.instantiate();
 	ResourceLoader::add_resource_format_loader(resource_loader_dds);
-
-	image_loader_dds.instantiate();
-	ImageLoader::add_image_format_loader(image_loader_dds);
 }
 
 void uninitialize_dds_module(ModuleInitializationLevel p_level) {
@@ -55,7 +50,4 @@ void uninitialize_dds_module(ModuleInitializationLevel p_level) {
 
 	ResourceLoader::remove_resource_format_loader(resource_loader_dds);
 	resource_loader_dds.unref();
-
-	ImageLoader::remove_image_format_loader(image_loader_dds);
-	image_loader_dds.unref();
 }
diff --git a/modules/dds/texture_loader_dds.cpp b/modules/dds/texture_loader_dds.cpp
index 861cf20cc2..8a3a36e84b 100644
--- a/modules/dds/texture_loader_dds.cpp
+++ b/modules/dds/texture_loader_dds.cpp
@@ -29,11 +29,72 @@
 /**************************************************************************/
 
 #include "texture_loader_dds.h"
-#include "image_loader_dds.h"
 
 #include "core/io/file_access.h"
 #include "scene/resources/image_texture.h"
 
+#define PF_FOURCC(s) ((uint32_t)(((s)[3] << 24U) | ((s)[2] << 16U) | ((s)[1] << 8U) | ((s)[0])))
+
+// Reference: https://docs.microsoft.com/en-us/windows/win32/direct3ddds/dds-header
+
+enum {
+	DDS_MAGIC = 0x20534444,
+	DDSD_PITCH = 0x00000008,
+	DDSD_LINEARSIZE = 0x00080000,
+	DDSD_MIPMAPCOUNT = 0x00020000,
+	DDPF_FOURCC = 0x00000004,
+	DDPF_ALPHAPIXELS = 0x00000001,
+	DDPF_INDEXED = 0x00000020,
+	DDPF_RGB = 0x00000040,
+};
+
+enum DDSFormat {
+	DDS_DXT1,
+	DDS_DXT3,
+	DDS_DXT5,
+	DDS_ATI1,
+	DDS_ATI2,
+	DDS_A2XY,
+	DDS_BGRA8,
+	DDS_BGR8,
+	DDS_RGBA8, //flipped in dds
+	DDS_RGB8, //flipped in dds
+	DDS_BGR5A1,
+	DDS_BGR565,
+	DDS_BGR10A2,
+	DDS_INDEXED,
+	DDS_LUMINANCE,
+	DDS_LUMINANCE_ALPHA,
+	DDS_MAX
+};
+
+struct DDSFormatInfo {
+	const char *name = nullptr;
+	bool compressed = false;
+	bool palette = false;
+	uint32_t divisor = 0;
+	uint32_t block_size = 0;
+	Image::Format format = Image::Format::FORMAT_BPTC_RGBA;
+};
+
+static const DDSFormatInfo dds_format_info[DDS_MAX] = {
+	{ "DXT1/BC1", true, false, 4, 8, Image::FORMAT_DXT1 },
+	{ "DXT3/BC2", true, false, 4, 16, Image::FORMAT_DXT3 },
+	{ "DXT5/BC3", true, false, 4, 16, Image::FORMAT_DXT5 },
+	{ "ATI1/BC4", true, false, 4, 8, Image::FORMAT_RGTC_R },
+	{ "ATI2/3DC/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
+	{ "A2XY/DXN/BC5", true, false, 4, 16, Image::FORMAT_RGTC_RG },
+	{ "BGRA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "BGR8", false, false, 1, 3, Image::FORMAT_RGB8 },
+	{ "RGBA8", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "RGB8", false, false, 1, 3, Image::FORMAT_RGB8 },
+	{ "BGR5A1", false, false, 1, 2, Image::FORMAT_RGBA8 },
+	{ "BGR565", false, false, 1, 2, Image::FORMAT_RGB8 },
+	{ "BGR10A2", false, false, 1, 4, Image::FORMAT_RGBA8 },
+	{ "GRAYSCALE", false, false, 1, 1, Image::FORMAT_L8 },
+	{ "GRAYSCALE_ALPHA", false, false, 1, 2, Image::FORMAT_LA8 }
+};
+
 Ref<Resource> ResourceFormatDDS::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
 	if (r_error) {
 		*r_error = ERR_CANT_OPEN;
@@ -52,12 +113,303 @@ Ref<Resource> ResourceFormatDDS::load(const String &p_path, const String &p_orig
 
 	ERR_FAIL_COND_V_MSG(err != OK, Ref<Resource>(), "Unable to open DDS texture file '" + p_path + "'.");
 
-	Ref<Image> img = memnew(Image);
-	Error i_error = ImageLoaderDDS().load_image(img, f, false, 1.0);
-	if (r_error) {
-		*r_error = i_error;
+	uint32_t magic = f->get_32();
+	uint32_t hsize = f->get_32();
+	uint32_t flags = f->get_32();
+	uint32_t height = f->get_32();
+	uint32_t width = f->get_32();
+	uint32_t pitch = f->get_32();
+	/* uint32_t depth = */ f->get_32();
+	uint32_t mipmaps = f->get_32();
+
+	//skip 11
+	for (int i = 0; i < 11; i++) {
+		f->get_32();
+	}
+
+	//validate
+
+	// We don't check DDSD_CAPS or DDSD_PIXELFORMAT, as they're mandatory when writing,
+	// but non-mandatory when reading (as some writers don't set them)...
+	if (magic != DDS_MAGIC || hsize != 124) {
+		ERR_FAIL_V_MSG(Ref<Resource>(), "Invalid or unsupported DDS texture file '" + p_path + "'.");
+	}
+
+	/* uint32_t format_size = */ f->get_32();
+	uint32_t format_flags = f->get_32();
+	uint32_t format_fourcc = f->get_32();
+	uint32_t format_rgb_bits = f->get_32();
+	uint32_t format_red_mask = f->get_32();
+	uint32_t format_green_mask = f->get_32();
+	uint32_t format_blue_mask = f->get_32();
+	uint32_t format_alpha_mask = f->get_32();
+
+	/* uint32_t caps_1 = */ f->get_32();
+	/* uint32_t caps_2 = */ f->get_32();
+	/* uint32_t caps_ddsx = */ f->get_32();
+
+	//reserved skip
+	f->get_32();
+	f->get_32();
+
+	/*
+	print_line("DDS width: "+itos(width));
+	print_line("DDS height: "+itos(height));
+	print_line("DDS mipmaps: "+itos(mipmaps));
+
+	printf("fourcc: %x fflags: %x, rgbbits: %x, fsize: %x\n",format_fourcc,format_flags,format_rgb_bits,format_size);
+	printf("rmask: %x gmask: %x, bmask: %x, amask: %x\n",format_red_mask,format_green_mask,format_blue_mask,format_alpha_mask);
+	*/
+
+	//must avoid this later
+	while (f->get_position() < 128) {
+		f->get_8();
+	}
+
+	DDSFormat dds_format;
+
+	if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT1")) {
+		dds_format = DDS_DXT1;
+	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT3")) {
+		dds_format = DDS_DXT3;
+
+	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("DXT5")) {
+		dds_format = DDS_DXT5;
+	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("ATI1")) {
+		dds_format = DDS_ATI1;
+	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("ATI2")) {
+		dds_format = DDS_ATI2;
+	} else if (format_flags & DDPF_FOURCC && format_fourcc == PF_FOURCC("A2XY")) {
+		dds_format = DDS_A2XY;
+
+	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0xff0000 && format_green_mask == 0xff00 && format_blue_mask == 0xff && format_alpha_mask == 0xff000000) {
+		dds_format = DDS_BGRA8;
+	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 24 && format_red_mask == 0xff0000 && format_green_mask == 0xff00 && format_blue_mask == 0xff) {
+		dds_format = DDS_BGR8;
+	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0xff && format_green_mask == 0xff00 && format_blue_mask == 0xff0000 && format_alpha_mask == 0xff000000) {
+		dds_format = DDS_RGBA8;
+	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 24 && format_red_mask == 0xff && format_green_mask == 0xff00 && format_blue_mask == 0xff0000) {
+		dds_format = DDS_RGB8;
+
+	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 16 && format_red_mask == 0x00007c00 && format_green_mask == 0x000003e0 && format_blue_mask == 0x0000001f && format_alpha_mask == 0x00008000) {
+		dds_format = DDS_BGR5A1;
+	} else if (format_flags & DDPF_RGB && format_flags & DDPF_ALPHAPIXELS && format_rgb_bits == 32 && format_red_mask == 0x3ff00000 && format_green_mask == 0xffc00 && format_blue_mask == 0x3ff && format_alpha_mask == 0xc0000000) {
+		dds_format = DDS_BGR10A2;
+	} else if (format_flags & DDPF_RGB && !(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 16 && format_red_mask == 0x0000f800 && format_green_mask == 0x000007e0 && format_blue_mask == 0x0000001f) {
+		dds_format = DDS_BGR565;
+	} else if (!(format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 8 && format_red_mask == 0xff && format_green_mask == 0xff && format_blue_mask == 0xff) {
+		dds_format = DDS_LUMINANCE;
+	} else if ((format_flags & DDPF_ALPHAPIXELS) && format_rgb_bits == 16 && format_red_mask == 0xff && format_green_mask == 0xff && format_blue_mask == 0xff && format_alpha_mask == 0xff00) {
+		dds_format = DDS_LUMINANCE_ALPHA;
+	} else if (format_flags & DDPF_INDEXED && format_rgb_bits == 8) {
+		dds_format = DDS_BGR565;
+	} else {
+		//printf("unrecognized fourcc %x format_flags: %x - rgbbits %i - red_mask %x green mask %x blue mask %x alpha mask %x\n", format_fourcc, format_flags, format_rgb_bits, format_red_mask, format_green_mask, format_blue_mask, format_alpha_mask);
+		ERR_FAIL_V_MSG(Ref<Resource>(), "Unrecognized or unsupported color layout in DDS '" + p_path + "'.");
+	}
+
+	if (!(flags & DDSD_MIPMAPCOUNT)) {
+		mipmaps = 1;
+	}
+
+	Vector<uint8_t> src_data;
+
+	const DDSFormatInfo &info = dds_format_info[dds_format];
+	uint32_t w = width;
+	uint32_t h = height;
+
+	if (info.compressed) {
+		//compressed bc
+
+		uint32_t size = MAX(info.divisor, w) / info.divisor * MAX(info.divisor, h) / info.divisor * info.block_size;
+		ERR_FAIL_COND_V(size != pitch, Ref<Resource>());
+		ERR_FAIL_COND_V(!(flags & DDSD_LINEARSIZE), Ref<Resource>());
+
+		for (uint32_t i = 1; i < mipmaps; i++) {
+			w = MAX(1u, w >> 1);
+			h = MAX(1u, h >> 1);
+			uint32_t bsize = MAX(info.divisor, w) / info.divisor * MAX(info.divisor, h) / info.divisor * info.block_size;
+			//printf("%i x %i - block: %i\n",w,h,bsize);
+			size += bsize;
+		}
+
+		src_data.resize(size);
+		uint8_t *wb = src_data.ptrw();
+		f->get_buffer(wb, size);
+
+	} else if (info.palette) {
+		//indexed
+		ERR_FAIL_COND_V(!(flags & DDSD_PITCH), Ref<Resource>());
+		ERR_FAIL_COND_V(format_rgb_bits != 8, Ref<Resource>());
+
+		uint32_t size = pitch * height;
+		ERR_FAIL_COND_V(size != width * height * info.block_size, Ref<Resource>());
+
+		uint8_t palette[256 * 4];
+		f->get_buffer(palette, 256 * 4);
+
+		int colsize = 3;
+		for (int i = 0; i < 256; i++) {
+			if (palette[i * 4 + 3] < 255) {
+				colsize = 4;
+			}
+		}
+
+		int w2 = width;
+		int h2 = height;
+
+		for (uint32_t i = 1; i < mipmaps; i++) {
+			w2 = (w2 + 1) >> 1;
+			h2 = (h2 + 1) >> 1;
+			size += w2 * h2 * info.block_size;
+		}
+
+		src_data.resize(size + 256 * colsize);
+		uint8_t *wb = src_data.ptrw();
+		f->get_buffer(wb, size);
+
+		for (int i = 0; i < 256; i++) {
+			int dst_ofs = size + i * colsize;
+			int src_ofs = i * 4;
+			wb[dst_ofs + 0] = palette[src_ofs + 2];
+			wb[dst_ofs + 1] = palette[src_ofs + 1];
+			wb[dst_ofs + 2] = palette[src_ofs + 0];
+			if (colsize == 4) {
+				wb[dst_ofs + 3] = palette[src_ofs + 3];
+			}
+		}
+	} else {
+		//uncompressed generic...
+
+		uint32_t size = width * height * info.block_size;
+
+		for (uint32_t i = 1; i < mipmaps; i++) {
+			w = (w + 1) >> 1;
+			h = (h + 1) >> 1;
+			size += w * h * info.block_size;
+		}
+
+		if (dds_format == DDS_BGR565) {
+			size = size * 3 / 2;
+		} else if (dds_format == DDS_BGR5A1) {
+			size = size * 2;
+		}
+
+		src_data.resize(size);
+		uint8_t *wb = src_data.ptrw();
+		f->get_buffer(wb, size);
+
+		switch (dds_format) {
+			case DDS_BGR5A1: {
+				// TO RGBA
+				int colcount = size / 4;
+
+				for (int i = colcount - 1; i >= 0; i--) {
+					int src_ofs = i * 2;
+					int dst_ofs = i * 4;
+
+					uint8_t a = wb[src_ofs + 1] & 0x80;
+					uint8_t b = wb[src_ofs] & 0x1F;
+					uint8_t g = (wb[src_ofs] >> 5) | ((wb[src_ofs + 1] & 0x3) << 3);
+					uint8_t r = (wb[src_ofs + 1] >> 2) & 0x1F;
+					wb[dst_ofs + 0] = r << 3;
+					wb[dst_ofs + 1] = g << 3;
+					wb[dst_ofs + 2] = b << 3;
+					wb[dst_ofs + 3] = a ? 255 : 0;
+				}
+			} break;
+			case DDS_BGR565: {
+				int colcount = size / 3;
+
+				for (int i = colcount - 1; i >= 0; i--) {
+					int src_ofs = i * 2;
+					int dst_ofs = i * 3;
+
+					uint8_t b = wb[src_ofs] & 0x1F;
+					uint8_t g = (wb[src_ofs] >> 5) | ((wb[src_ofs + 1] & 0x7) << 3);
+					uint8_t r = wb[src_ofs + 1] >> 3;
+					wb[dst_ofs + 0] = r << 3;
+					wb[dst_ofs + 1] = g << 2;
+					wb[dst_ofs + 2] = b << 3; //b<<3;
+				}
+
+			} break;
+			case DDS_BGR10A2: {
+				// TO RGBA
+				int colcount = size / 4;
+
+				for (int i = colcount - 1; i >= 0; i--) {
+					int ofs = i * 4;
+
+					uint32_t w32 = uint32_t(wb[ofs + 0]) | (uint32_t(wb[ofs + 1]) << 8) | (uint32_t(wb[ofs + 2]) << 16) | (uint32_t(wb[ofs + 3]) << 24);
+
+					uint8_t a = (w32 & 0xc0000000) >> 24;
+					uint8_t r = (w32 & 0x3ff00000) >> 22;
+					uint8_t g = (w32 & 0xffc00) >> 12;
+					uint8_t b = (w32 & 0x3ff) >> 2;
+
+					wb[ofs + 0] = r;
+					wb[ofs + 1] = g;
+					wb[ofs + 2] = b;
+					wb[ofs + 3] = a == 0xc0 ? 255 : a; //0xc0 should be opaque
+				}
+			} break;
+			case DDS_BGRA8: {
+				int colcount = size / 4;
+
+				for (int i = 0; i < colcount; i++) {
+					SWAP(wb[i * 4 + 0], wb[i * 4 + 2]);
+				}
+
+			} break;
+			case DDS_BGR8: {
+				int colcount = size / 3;
+
+				for (int i = 0; i < colcount; i++) {
+					SWAP(wb[i * 3 + 0], wb[i * 3 + 2]);
+				}
+			} break;
+			case DDS_RGBA8: {
+				/* do nothing either
+				int colcount = size/4;
+
+				for(int i=0;i<colcount;i++) {
+					uint8_t r = wb[i*4+1];
+					uint8_t g = wb[i*4+2];
+					uint8_t b = wb[i*4+3];
+					uint8_t a = wb[i*4+0];
+
+					wb[i*4+0]=r;
+					wb[i*4+1]=g;
+					wb[i*4+2]=b;
+					wb[i*4+3]=a;
+				}
+				*/
+			} break;
+			case DDS_RGB8: {
+				// do nothing
+				/*
+				int colcount = size/3;
+
+				for(int i=0;i<colcount;i++) {
+					SWAP( wb[i*3+0],wb[i*3+2] );
+				}*/
+			} break;
+			case DDS_LUMINANCE: {
+				// do nothing i guess?
+
+			} break;
+			case DDS_LUMINANCE_ALPHA: {
+				// do nothing i guess?
+
+			} break;
+
+			default: {
+			}
+		}
 	}
 
+	Ref<Image> img = memnew(Image(width, height, mipmaps - 1, info.format, src_data));
 	Ref<ImageTexture> texture = ImageTexture::create_from_image(img);
 
 	if (r_error) {
diff --git a/tests/core/io/test_image.h b/tests/core/io/test_image.h
index 1897971113..07c7c04e36 100644
--- a/tests/core/io/test_image.h
+++ b/tests/core/io/test_image.h
@@ -115,16 +115,6 @@ TEST_CASE("[Image] Saving and loading") {
 			image_bmp->load_bmp_from_buffer(data_bmp) == OK,
 			"The BMP image should load successfully.");
 
-	// Load DDS
-	Ref<Image> image_dds = memnew(Image());
-	Ref<FileAccess> f_dds = FileAccess::open(TestUtils::get_data_path("images/icon.dds"), FileAccess::READ, &err);
-	PackedByteArray data_dds;
-	data_dds.resize(f_dds->get_length() + 1);
-	f_dds->get_buffer(data_dds.ptrw(), f_dds->get_length());
-	CHECK_MESSAGE(
-			image_dds->load_dds_from_buffer(data_dds) == OK,
-			"The DDS image should load successfully.");
-
 	// Load JPG
 	Ref<Image> image_jpg = memnew(Image());
 	Ref<FileAccess> f_jpg = FileAccess::open(TestUtils::get_data_path("images/icon.jpg"), FileAccess::READ, &err);
diff --git a/tests/data/images/icon.dds b/tests/data/images/icon.dds
deleted file mode 100644
index 8a9de402cb..0000000000
--- a/tests/data/images/icon.dds
+++ /dev/null