LibGfx: Add support for DDS images

6 files changed, 1332 insertions, 10 deletions

diff --git a/Userland/Libraries/LibGfx/Bitmap.cpp b/Userland/Libraries/LibGfx/Bitmap.cpp
index 0d9cb01d19..bc4d586513 100644
--- a/Userland/Libraries/LibGfx/Bitmap.cpp
+++ b/Userland/Libraries/LibGfx/Bitmap.cpp
@@ -13,6 +13,7 @@
 #include <AK/String.h>
 #include <LibGfx/BMPLoader.h>
 #include <LibGfx/Bitmap.h>
+#include <LibGfx/DDSLoader.h>
 #include <LibGfx/GIFLoader.h>
 #include <LibGfx/ICOLoader.h>
 #include <LibGfx/JPGLoader.h>
diff --git a/Userland/Libraries/LibGfx/Bitmap.h b/Userland/Libraries/LibGfx/Bitmap.h
index 9a6cfee8a3..461645a97b 100644
--- a/Userland/Libraries/LibGfx/Bitmap.h
+++ b/Userland/Libraries/LibGfx/Bitmap.h
@@ -13,16 +13,17 @@
 #include <LibGfx/Forward.h>
 #include <LibGfx/Rect.h>
 
-#define ENUMERATE_IMAGE_FORMATS           \
-    __ENUMERATE_IMAGE_FORMAT(pbm, ".pbm") \
-    __ENUMERATE_IMAGE_FORMAT(pgm, ".pgm") \
-    __ENUMERATE_IMAGE_FORMAT(png, ".png") \
-    __ENUMERATE_IMAGE_FORMAT(ppm, ".ppm") \
-    __ENUMERATE_IMAGE_FORMAT(gif, ".gif") \
-    __ENUMERATE_IMAGE_FORMAT(bmp, ".bmp") \
-    __ENUMERATE_IMAGE_FORMAT(ico, ".ico") \
-    __ENUMERATE_IMAGE_FORMAT(jpg, ".jpg") \
-    __ENUMERATE_IMAGE_FORMAT(jpg, ".jpeg")
+#define ENUMERATE_IMAGE_FORMATS            \
+    __ENUMERATE_IMAGE_FORMAT(pbm, ".pbm")  \
+    __ENUMERATE_IMAGE_FORMAT(pgm, ".pgm")  \
+    __ENUMERATE_IMAGE_FORMAT(png, ".png")  \
+    __ENUMERATE_IMAGE_FORMAT(ppm, ".ppm")  \
+    __ENUMERATE_IMAGE_FORMAT(gif, ".gif")  \
+    __ENUMERATE_IMAGE_FORMAT(bmp, ".bmp")  \
+    __ENUMERATE_IMAGE_FORMAT(ico, ".ico")  \
+    __ENUMERATE_IMAGE_FORMAT(jpg, ".jpg")  \
+    __ENUMERATE_IMAGE_FORMAT(jpg, ".jpeg") \
+    __ENUMERATE_IMAGE_FORMAT(dds, ".dds")
 
 namespace Gfx {
 
diff --git a/Userland/Libraries/LibGfx/CMakeLists.txt b/Userland/Libraries/LibGfx/CMakeLists.txt
index 17dd58938b..ad84121ece 100644
--- a/Userland/Libraries/LibGfx/CMakeLists.txt
+++ b/Userland/Libraries/LibGfx/CMakeLists.txt
@@ -8,6 +8,7 @@ set(SOURCES
     ClassicStylePainter.cpp
     ClassicWindowTheme.cpp
     Color.cpp
+    DDSLoader.cpp
     DisjointRectSet.cpp
     Emoji.cpp
     FontDatabase.cpp
diff --git a/Userland/Libraries/LibGfx/DDSLoader.cpp b/Userland/Libraries/LibGfx/DDSLoader.cpp
new file mode 100644
index 0000000000..d83721ef9a
--- /dev/null
+++ b/Userland/Libraries/LibGfx/DDSLoader.cpp
@@ -0,0 +1,1054 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <AK/Debug.h>
+#include <AK/Endian.h>
+#include <AK/LexicalPath.h>
+#include <AK/MappedFile.h>
+#include <AK/MemoryStream.h>
+#include <AK/StringBuilder.h>
+#include <AK/Vector.h>
+#include <LibGfx/DDSLoader.h>
+#include <fcntl.h>
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#ifdef __serenity__
+#    include <serenity.h>
+#endif
+
+namespace Gfx {
+
+struct DDSLoadingContext {
+    enum State {
+        NotDecoded = 0,
+        Error,
+        BitmapDecoded,
+    };
+
+    State state { State::NotDecoded };
+
+    const u8* data { nullptr };
+    size_t data_size { 0 };
+
+    DDSHeader header;
+    DDSHeaderDXT10 header10;
+    RefPtr<Gfx::Bitmap> bitmap;
+
+    void dump_debug();
+};
+
+static constexpr u32 create_four_cc(char c0, char c1, char c2, char c3)
+{
+    return c0 | c1 << 8 | c2 << 16 | c3 << 24;
+}
+
+static bool is_planar(DXGIFormat format)
+{
+    switch (format) {
+    case DXGI_FORMAT_NV12:
+    case DXGI_FORMAT_420_OPAQUE:
+    case DXGI_FORMAT_P208:
+    case DXGI_FORMAT_P010:
+    case DXGI_FORMAT_P016:
+        return true;
+    default:
+        return false;
+    }
+}
+
+static bool is_packed(DXGIFormat format)
+{
+    switch (format) {
+    case DXGI_FORMAT_R8G8_B8G8_UNORM:
+    case DXGI_FORMAT_G8R8_G8B8_UNORM:
+    case DXGI_FORMAT_YUY2:
+    case DXGI_FORMAT_Y210:
+    case DXGI_FORMAT_Y216:
+        return true;
+    default:
+        return false;
+    }
+}
+
+static u64 get_width(DDSHeader header, size_t mipmap_level)
+{
+    if (mipmap_level >= header.mip_map_count) {
+        return header.width;
+    }
+
+    return header.width >> mipmap_level;
+}
+
+static u64 get_height(DDSHeader header, size_t mipmap_level)
+{
+    if (mipmap_level >= header.mip_map_count) {
+        return header.height;
+    }
+
+    return header.height >> mipmap_level;
+}
+
+static constexpr bool has_bitmask(DDSPixelFormat format, u32 r, u32 g, u32 b, u32 a)
+{
+    return format.r_bit_mask == r && format.g_bit_mask == g && format.b_bit_mask == b && format.a_bit_mask == a;
+}
+
+static DXGIFormat get_format(DDSPixelFormat format)
+{
+    if ((format.flags & PixelFormatFlags::DDPF_RGB) == PixelFormatFlags::DDPF_RGB) {
+        switch (format.rgb_bit_count) {
+        case 32: {
+            if (has_bitmask(format, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000))
+                return DXGI_FORMAT_R8G8B8A8_UNORM;
+            if (has_bitmask(format, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000))
+                return DXGI_FORMAT_B8G8R8A8_UNORM;
+            if (has_bitmask(format, 0x00FF0000, 0x0000FF00, 0x000000FF, 0x00000000))
+                return DXGI_FORMAT_B8G8R8X8_UNORM;
+            if (has_bitmask(format, 0x3FF00000, 0x000FFC00, 0x000003FF, 0xC0000000))
+                return DXGI_FORMAT_R10G10B10A2_UNORM;
+            if (has_bitmask(format, 0x0000FFFF, 0xFFFF0000, 0x00000000, 0x00000000))
+                return DXGI_FORMAT_R16G16_UNORM;
+            if (has_bitmask(format, 0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000))
+                return DXGI_FORMAT_R32_FLOAT;
+            break;
+        }
+        case 24:
+            break;
+        case 16: {
+            if (has_bitmask(format, 0x7C00, 0x03E0, 0x001F, 0x8000))
+                return DXGI_FORMAT_B5G5R5A1_UNORM;
+            if (has_bitmask(format, 0xF800, 0x07E0, 0x001F, 0x0000))
+                return DXGI_FORMAT_B5G6R5_UNORM;
+            if (has_bitmask(format, 0xF800, 0x07E0, 0x001F, 0x0000))
+                return DXGI_FORMAT_B5G6R5_UNORM;
+            if (has_bitmask(format, 0x0F00, 0x00F0, 0x000F, 0xF000))
+                return DXGI_FORMAT_B4G4R4A4_UNORM;
+            if (has_bitmask(format, 0x00FF, 0x0000, 0x0000, 0xFF00))
+                return DXGI_FORMAT_R8G8_UNORM;
+            if (has_bitmask(format, 0xFFFF, 0x0000, 0x0000, 0x0000))
+                return DXGI_FORMAT_R16_UNORM;
+            break;
+        }
+        case 8: {
+            if (has_bitmask(format, 0xFF, 0x00, 0x00, 0x00))
+                return DXGI_FORMAT_R8_UNORM;
+            break;
+        }
+        }
+    } else if ((format.flags & PixelFormatFlags::DDPF_LUMINANCE) == PixelFormatFlags::DDPF_LUMINANCE) {
+        switch (format.rgb_bit_count) {
+        case 16: {
+            if (has_bitmask(format, 0xFFFF, 0x0000, 0x0000, 0x0000))
+                return DXGI_FORMAT_R16_UNORM;
+            if (has_bitmask(format, 0x00FF, 0x0000, 0x0000, 0xFF00))
+                return DXGI_FORMAT_R8G8_UNORM;
+            break;
+        }
+        case 8: {
+            if (has_bitmask(format, 0xFF, 0x00, 0x00, 0x00))
+                return DXGI_FORMAT_R8_UNORM;
+
+            // Some writers mistakenly write this as 8 bpp.
+            if (has_bitmask(format, 0x00FF, 0x0000, 0x0000, 0xFF00))
+                return DXGI_FORMAT_R8G8_UNORM;
+            break;
+        }
+        }
+    } else if ((format.flags & PixelFormatFlags::DDPF_ALPHA) == PixelFormatFlags::DDPF_ALPHA) {
+        if (format.rgb_bit_count == 8)
+            return DXGI_FORMAT_A8_UNORM;
+    } else if ((format.flags & PixelFormatFlags::DDPF_BUMPDUDV) == PixelFormatFlags::DDPF_BUMPDUDV) {
+        switch (format.rgb_bit_count) {
+        case 32: {
+            if (has_bitmask(format, 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000))
+                return DXGI_FORMAT_R8G8B8A8_SNORM;
+            if (has_bitmask(format, 0x0000FFFF, 0xFFFF0000, 0x00000000, 0x00000000))
+                return DXGI_FORMAT_R16G16_SNORM;
+            break;
+        }
+        case 16: {
+            if (has_bitmask(format, 0x00FF, 0xFF00, 0x0000, 0x0000))
+                return DXGI_FORMAT_R8G8_SNORM;
+            break;
+        }
+        }
+    } else if ((format.flags & PixelFormatFlags::DDPF_FOURCC) == PixelFormatFlags::DDPF_FOURCC) {
+        if (format.four_cc == create_four_cc('D', 'X', 'T', '1'))
+            return DXGI_FORMAT_BC1_UNORM;
+        if (format.four_cc == create_four_cc('D', 'X', 'T', '2'))
+            return DXGI_FORMAT_BC2_UNORM;
+        if (format.four_cc == create_four_cc('D', 'X', 'T', '3'))
+            return DXGI_FORMAT_BC2_UNORM;
+        if (format.four_cc == create_four_cc('D', 'X', 'T', '4'))
+            return DXGI_FORMAT_BC3_UNORM;
+        if (format.four_cc == create_four_cc('D', 'X', 'T', '5'))
+            return DXGI_FORMAT_BC3_UNORM;
+        if (format.four_cc == create_four_cc('A', 'T', 'I', '1'))
+            return DXGI_FORMAT_BC4_UNORM;
+        if (format.four_cc == create_four_cc('B', 'C', '4', 'U'))
+            return DXGI_FORMAT_BC4_UNORM;
+        if (format.four_cc == create_four_cc('B', 'C', '4', 'S'))
+            return DXGI_FORMAT_BC4_SNORM;
+        if (format.four_cc == create_four_cc('A', 'T', 'I', '2'))
+            return DXGI_FORMAT_BC5_UNORM;
+        if (format.four_cc == create_four_cc('B', 'C', '5', 'U'))
+            return DXGI_FORMAT_BC5_UNORM;
+        if (format.four_cc == create_four_cc('B', 'C', '5', 'S'))
+            return DXGI_FORMAT_BC5_SNORM;
+        if (format.four_cc == create_four_cc('R', 'G', 'B', 'G'))
+            return DXGI_FORMAT_R8G8_B8G8_UNORM;
+        if (format.four_cc == create_four_cc('G', 'R', 'G', 'B'))
+            return DXGI_FORMAT_G8R8_G8B8_UNORM;
+        if (format.four_cc == create_four_cc('Y', 'U', 'Y', '2'))
+            return DXGI_FORMAT_YUY2;
+
+        switch (format.four_cc) {
+        case 36:
+            return DXGI_FORMAT_R16G16B16A16_UNORM;
+        case 110:
+            return DXGI_FORMAT_R16G16B16A16_SNORM;
+        case 111:
+            return DXGI_FORMAT_R16_FLOAT;
+        case 112:
+            return DXGI_FORMAT_R16G16_FLOAT;
+        case 113:
+            return DXGI_FORMAT_R16G16B16A16_FLOAT;
+        case 114:
+            return DXGI_FORMAT_R32_FLOAT;
+        case 115:
+            return DXGI_FORMAT_R32G32_FLOAT;
+        case 116:
+            return DXGI_FORMAT_R32G32B32A32_FLOAT;
+        }
+    }
+
+    return DXGI_FORMAT_UNKNOWN;
+}
+
+static bool is_block_compressed(DXGIFormat format)
+{
+    switch (format) {
+    case DXGI_FORMAT_BC1_TYPELESS:
+    case DXGI_FORMAT_BC1_UNORM:
+    case DXGI_FORMAT_BC1_UNORM_SRGB:
+    case DXGI_FORMAT_BC4_TYPELESS:
+    case DXGI_FORMAT_BC4_UNORM:
+    case DXGI_FORMAT_BC4_SNORM:
+    case DXGI_FORMAT_BC2_TYPELESS:
+    case DXGI_FORMAT_BC2_UNORM:
+    case DXGI_FORMAT_BC2_UNORM_SRGB:
+    case DXGI_FORMAT_BC3_TYPELESS:
+    case DXGI_FORMAT_BC3_UNORM:
+    case DXGI_FORMAT_BC3_UNORM_SRGB:
+    case DXGI_FORMAT_BC5_TYPELESS:
+    case DXGI_FORMAT_BC5_UNORM:
+    case DXGI_FORMAT_BC5_SNORM:
+    case DXGI_FORMAT_BC6H_TYPELESS:
+    case DXGI_FORMAT_BC6H_UF16:
+    case DXGI_FORMAT_BC6H_SF16:
+    case DXGI_FORMAT_BC7_TYPELESS:
+    case DXGI_FORMAT_BC7_UNORM:
+    case DXGI_FORMAT_BC7_UNORM_SRGB:
+        return true;
+
+    default:
+        return false;
+    }
+}
+
+static size_t block_size(DXGIFormat format)
+{
+    switch (format) {
+    case DXGI_FORMAT_BC2_TYPELESS:
+    case DXGI_FORMAT_BC2_UNORM:
+    case DXGI_FORMAT_BC2_UNORM_SRGB:
+    case DXGI_FORMAT_BC3_TYPELESS:
+    case DXGI_FORMAT_BC3_UNORM:
+    case DXGI_FORMAT_BC3_UNORM_SRGB:
+    case DXGI_FORMAT_BC5_TYPELESS:
+    case DXGI_FORMAT_BC5_UNORM:
+    case DXGI_FORMAT_BC5_SNORM:
+    case DXGI_FORMAT_BC6H_TYPELESS:
+    case DXGI_FORMAT_BC6H_UF16:
+    case DXGI_FORMAT_BC6H_SF16:
+    case DXGI_FORMAT_BC7_TYPELESS:
+    case DXGI_FORMAT_BC7_UNORM:
+    case DXGI_FORMAT_BC7_UNORM_SRGB:
+        return 16;
+
+    case DXGI_FORMAT_BC1_TYPELESS:
+    case DXGI_FORMAT_BC1_UNORM:
+    case DXGI_FORMAT_BC1_UNORM_SRGB:
+    case DXGI_FORMAT_BC4_TYPELESS:
+    case DXGI_FORMAT_BC4_UNORM:
+    case DXGI_FORMAT_BC4_SNORM:
+    case DXGI_FORMAT_Y210:
+    case DXGI_FORMAT_Y216:
+        return 8;
+
+    case DXGI_FORMAT_R8G8_B8G8_UNORM:
+    case DXGI_FORMAT_G8R8_G8B8_UNORM:
+    case DXGI_FORMAT_YUY2:
+    case DXGI_FORMAT_P010:
+    case DXGI_FORMAT_P016:
+        return 4;
+
+    case DXGI_FORMAT_NV12:
+    case DXGI_FORMAT_420_OPAQUE:
+    case DXGI_FORMAT_P208:
+        return 2;
+
+    default:
+        return 0;
+    }
+}
+
+static size_t bits_per_pixel(DXGIFormat format)
+{
+    switch (format) {
+    case DXGI_FORMAT_R32G32B32A32_TYPELESS:
+    case DXGI_FORMAT_R32G32B32A32_FLOAT:
+    case DXGI_FORMAT_R32G32B32A32_UINT:
+    case DXGI_FORMAT_R32G32B32A32_SINT:
+        return 128;
+
+    case DXGI_FORMAT_R32G32B32_TYPELESS:
+    case DXGI_FORMAT_R32G32B32_FLOAT:
+    case DXGI_FORMAT_R32G32B32_UINT:
+    case DXGI_FORMAT_R32G32B32_SINT:
+        return 96;
+
+    case DXGI_FORMAT_R16G16B16A16_TYPELESS:
+    case DXGI_FORMAT_R16G16B16A16_FLOAT:
+    case DXGI_FORMAT_R16G16B16A16_UNORM:
+    case DXGI_FORMAT_R16G16B16A16_UINT:
+    case DXGI_FORMAT_R16G16B16A16_SNORM:
+    case DXGI_FORMAT_R16G16B16A16_SINT:
+    case DXGI_FORMAT_R32G32_TYPELESS:
+    case DXGI_FORMAT_R32G32_FLOAT:
+    case DXGI_FORMAT_R32G32_UINT:
+    case DXGI_FORMAT_R32G32_SINT:
+    case DXGI_FORMAT_R32G8X24_TYPELESS:
+    case DXGI_FORMAT_D32_FLOAT_S8X24_UINT:
+    case DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS:
+    case DXGI_FORMAT_X32_TYPELESS_G8X24_UINT:
+    case DXGI_FORMAT_Y416:
+    case DXGI_FORMAT_Y210:
+    case DXGI_FORMAT_Y216:
+        return 64;
+
+    case DXGI_FORMAT_R10G10B10A2_TYPELESS:
+    case DXGI_FORMAT_R10G10B10A2_UNORM:
+    case DXGI_FORMAT_R10G10B10A2_UINT:
+    case DXGI_FORMAT_R11G11B10_FLOAT:
+    case DXGI_FORMAT_R8G8B8A8_TYPELESS:
+    case DXGI_FORMAT_R8G8B8A8_UNORM:
+    case DXGI_FORMAT_R8G8B8A8_UNORM_SRGB:
+    case DXGI_FORMAT_R8G8B8A8_UINT:
+    case DXGI_FORMAT_R8G8B8A8_SNORM:
+    case DXGI_FORMAT_R8G8B8A8_SINT:
+    case DXGI_FORMAT_R16G16_TYPELESS:
+    case DXGI_FORMAT_R16G16_FLOAT:
+    case DXGI_FORMAT_R16G16_UNORM:
+    case DXGI_FORMAT_R16G16_UINT:
+    case DXGI_FORMAT_R16G16_SNORM:
+    case DXGI_FORMAT_R16G16_SINT:
+    case DXGI_FORMAT_R32_TYPELESS:
+    case DXGI_FORMAT_D32_FLOAT:
+    case DXGI_FORMAT_R32_FLOAT:
+    case DXGI_FORMAT_R32_UINT:
+    case DXGI_FORMAT_R32_SINT:
+    case DXGI_FORMAT_R24G8_TYPELESS:
+    case DXGI_FORMAT_D24_UNORM_S8_UINT:
+    case DXGI_FORMAT_R24_UNORM_X8_TYPELESS:
+    case DXGI_FORMAT_X24_TYPELESS_G8_UINT:
+    case DXGI_FORMAT_R9G9B9E5_SHAREDEXP:
+    case DXGI_FORMAT_R8G8_B8G8_UNORM:
+    case DXGI_FORMAT_G8R8_G8B8_UNORM:
+    case DXGI_FORMAT_B8G8R8A8_UNORM:
+    case DXGI_FORMAT_B8G8R8X8_UNORM:
+    case DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM:
+    case DXGI_FORMAT_B8G8R8A8_TYPELESS:
+    case DXGI_FORMAT_B8G8R8A8_UNORM_SRGB:
+    case DXGI_FORMAT_B8G8R8X8_TYPELESS:
+    case DXGI_FORMAT_B8G8R8X8_UNORM_SRGB:
+    case DXGI_FORMAT_AYUV:
+    case DXGI_FORMAT_Y410:
+    case DXGI_FORMAT_YUY2:
+        return 32;
+
+    case DXGI_FORMAT_P010:
+    case DXGI_FORMAT_P016:
+    case DXGI_FORMAT_V408:
+        return 24;
+
+    case DXGI_FORMAT_R8G8_TYPELESS:
+    case DXGI_FORMAT_R8G8_UNORM:
+    case DXGI_FORMAT_R8G8_UINT:
+    case DXGI_FORMAT_R8G8_SNORM:
+    case DXGI_FORMAT_R8G8_SINT:
+    case DXGI_FORMAT_R16_TYPELESS:
+    case DXGI_FORMAT_R16_FLOAT:
+    case DXGI_FORMAT_D16_UNORM:
+    case DXGI_FORMAT_R16_UNORM:
+    case DXGI_FORMAT_R16_UINT:
+    case DXGI_FORMAT_R16_SNORM:
+    case DXGI_FORMAT_R16_SINT:
+    case DXGI_FORMAT_B5G6R5_UNORM:
+    case DXGI_FORMAT_B5G5R5A1_UNORM:
+    case DXGI_FORMAT_A8P8:
+    case DXGI_FORMAT_B4G4R4A4_UNORM:
+    case DXGI_FORMAT_P208:
+    case DXGI_FORMAT_V208:
+        return 16;
+
+    case DXGI_FORMAT_NV12:
+    case DXGI_FORMAT_420_OPAQUE:
+    case DXGI_FORMAT_NV11:
+        return 12;
+
+    case DXGI_FORMAT_R8_TYPELESS:
+    case DXGI_FORMAT_R8_UNORM:
+    case DXGI_FORMAT_R8_UINT:
+    case DXGI_FORMAT_R8_SNORM:
+    case DXGI_FORMAT_R8_SINT:
+    case DXGI_FORMAT_A8_UNORM:
+    case DXGI_FORMAT_BC2_TYPELESS:
+    case DXGI_FORMAT_BC2_UNORM:
+    case DXGI_FORMAT_BC2_UNORM_SRGB:
+    case DXGI_FORMAT_BC3_TYPELESS:
+    case DXGI_FORMAT_BC3_UNORM:
+    case DXGI_FORMAT_BC3_UNORM_SRGB:
+    case DXGI_FORMAT_BC5_TYPELESS:
+    case DXGI_FORMAT_BC5_UNORM:
+    case DXGI_FORMAT_BC5_SNORM:
+    case DXGI_FORMAT_BC6H_TYPELESS:
+    case DXGI_FORMAT_BC6H_UF16:
+    case DXGI_FORMAT_BC6H_SF16:
+    case DXGI_FORMAT_BC7_TYPELESS:
+    case DXGI_FORMAT_BC7_UNORM:
+    case DXGI_FORMAT_BC7_UNORM_SRGB:
+    case DXGI_FORMAT_AI44:
+    case DXGI_FORMAT_IA44:
+    case DXGI_FORMAT_P8:
+        return 8;
+
+    case DXGI_FORMAT_R1_UNORM:
+        return 1;
+
+    case DXGI_FORMAT_BC1_TYPELESS:
+    case DXGI_FORMAT_BC1_UNORM:
+    case DXGI_FORMAT_BC1_UNORM_SRGB:
+    case DXGI_FORMAT_BC4_TYPELESS:
+    case DXGI_FORMAT_BC4_UNORM:
+    case DXGI_FORMAT_BC4_SNORM:
+        return 4;
+
+    default:
+        return 0;
+    }
+}
+
+static void decode_dx5_alpha_block(InputMemoryStream& stream, DDSLoadingContext& context, u64 bitmap_x, u64 bitmap_y)
+{
+    LittleEndian<u8> color0 {}, color1 {};
+    LittleEndian<u8> code0 {}, code1 {}, code2 {}, code3 {}, code4 {}, code5 {};
+
+    stream >> color0;
+    stream >> color1;
+    stream >> code0;
+    stream >> code1;
+    stream >> code2;
+    stream >> code3;
+    stream >> code4;
+    stream >> code5;
+
+    u32 codes[6] = { 0 };
+    codes[0] = code0 + 256 * (code1 + 256);
+    codes[1] = code1 + 256 * (code2 + 256);
+    codes[2] = code2 + 256 * (code3 + 256);
+    codes[3] = code3 + 256 * (code4 + 256);
+    codes[4] = code4 + 256 * code5;
+    codes[5] = code5;
+
+    u32 color[8] = { 0 };
+
+    if (color0 > 128) {
+        color[0] = color0;
+    }
+
+    if (color1 > 128) {
+        color[1] = color1;
+    }
+
+    if (color0 > color1) {
+        color[2] = (6 * color[0] + 1 * color[1]) / 7;
+        color[3] = (5 * color[0] + 2 * color[1]) / 7;
+        color[4] = (4 * color[0] + 3 * color[1]) / 7;
+        color[5] = (3 * color[0] + 4 * color[1]) / 7;
+        color[6] = (2 * color[0] + 5 * color[1]) / 7;
+        color[7] = (1 * color[0] + 6 * color[1]) / 7;
+    } else {
+        color[2] = (4 * color[0] + 1 * color[1]) / 5;
+        color[3] = (3 * color[0] + 2 * color[1]) / 5;
+        color[4] = (2 * color[0] + 3 * color[1]) / 5;
+        color[5] = (1 * color[0] + 4 * color[1]) / 5;
+        color[6] = 0;
+        color[7] = 255;
+    }
+
+    for (size_t y = 0; y < 4; y++) {
+        for (size_t x = 0; x < 4; x++) {
+            u8 index = 3 * (4 * y + x);
+            u8 bit_location = floor(index / 8.0);
+            u8 adjusted_index = index - (bit_location * 8);
+
+            u8 code = (codes[bit_location] >> adjusted_index) & 7;
+            u8 alpha = color[code];
+
+            Color color = Color(0, 0, 0, alpha);
+            context.bitmap->set_pixel(bitmap_x + x, bitmap_y + y, color);
+        }
+    }
+}
+
+static void decode_dx3_alpha_block(InputMemoryStream& stream, DDSLoadingContext& context, u64 bitmap_x, u64 bitmap_y)
+{
+    LittleEndian<u8> a0 {}, a1 {}, a2 {}, a3 {}, a4 {}, a5 {}, a6 {}, a7 {};
+
+    stream >> a0;
+    stream >> a1;
+    stream >> a2;
+    stream >> a3;
+    stream >> a4;
+    stream >> a5;
+    stream >> a6;
+    stream >> a7;
+
+    u64 alpha_0 = a0 + 256u * (a1 + 256u * (a2 + 256u * (a3 + 256u)));
+    u64 alpha_1 = a4 + 256u * (a5 + 256u * (a6 + 256u * a7));
+
+    for (size_t y = 0; y < 4; y++) {
+        for (size_t x = 0; x < 4; x++) {
+            u8 code = 4 * (4 * y + x);
+
+            if (code >= 32) {
+                code = code - 32;
+                u8 alpha = ((alpha_1 >> code) & 0x0F) * 17;
+
+                Color color = Color(0, 0, 0, alpha);
+                context.bitmap->set_pixel(bitmap_x + x, bitmap_y + y, color);
+            } else {
+                u8 alpha = ((alpha_0 >> code) & 0x0F) * 17;
+
+                Color color = Color(0, 0, 0, alpha);
+                context.bitmap->set_pixel(bitmap_x + x, bitmap_y + y, color);
+            }
+        }
+    }
+}
+
+static void unpack_rbg_565(u32 rgb, u8* output)
+{
+    u8 r = (rgb >> 11) & 0x1F;
+    u8 g = (rgb >> 5) & 0x3F;
+    u8 b = rgb & 0x1F;
+
+    output[0] = (r << 3) | (r >> 2);
+    output[1] = (g << 2) | (g >> 4);
+    output[2] = (b << 3) | (b >> 2);
+    output[3] = 255;
+}
+
+static void decode_color_block(InputMemoryStream& stream, DDSLoadingContext& context, bool dxt1, u64 bitmap_x, u64 bitmap_y)
+{
+    LittleEndian<u8> c0_low {}, c0_high {}, c1_low {}, c1_high {};
+    LittleEndian<u8> codes_0 {}, codes_1 {}, codes_2 {}, codes_3 {};
+
+    stream >> c0_low;
+    stream >> c0_high;
+    stream >> c1_low;
+    stream >> c1_high;
+    stream >> codes_0;
+    stream >> codes_1;
+    stream >> codes_2;
+    stream >> codes_3;
+
+    u64 code = codes_0 + 256 * (codes_1 + 256 * (codes_2 + 256 * codes_3));
+    u32 color_0 = c0_low + (c0_high * 256);
+    u32 color_1 = c1_low + (c1_high * 256);
+
+    u8 rgba[4][4];
+    unpack_rbg_565(color_0, rgba[0]);
+    unpack_rbg_565(color_1, rgba[1]);
+
+    if (color_0 > color_1) {
+        for (size_t i = 0; i < 3; i++) {
+            rgba[2][i] = (2 * rgba[0][i] + rgba[1][i]) / 3;
+            rgba[3][i] = (rgba[0][i] + 2 * rgba[1][i]) / 3;
+        }
+
+        rgba[2][3] = 255;
+        rgba[3][3] = 255;
+    } else {
+        for (size_t i = 0; i < 3; i++) {
+            rgba[2][i] = (rgba[0][i] + rgba[1][i]) / 2;
+            rgba[3][i] = 0;
+        }
+
+        rgba[2][3] = 255;
+        rgba[3][3] = dxt1 ? 0 : 255;
+    }
+
+    size_t i = 0;
+    for (size_t y = 0; y < 4; y++) {
+        for (size_t x = 0; x < 4; x++) {
+            u8 code_byte = (code >> (i * 2)) & 3;
+            u8 r = rgba[code_byte][0];
+            u8 g = rgba[code_byte][1];
+            u8 b = rgba[code_byte][2];
+            u8 a = dxt1 ? rgba[code_byte][3] : context.bitmap->get_pixel(bitmap_x + x, bitmap_y + y).alpha();
+
+            Color color = Color(r, g, b, a);
+            context.bitmap->set_pixel(bitmap_x + x, bitmap_y + y, color);
+            i++;
+        }
+    }
+}
+
+static void decode_dxt(InputMemoryStream& stream, DDSLoadingContext& context, DXGIFormat format, u64 width, u64 y)
+{
+    if (format == DXGI_FORMAT_BC1_UNORM) {
+        for (size_t x = 0; x < width; x += 4) {
+            decode_color_block(stream, context, true, x, y);
+        }
+    }
+
+    if (format == DXGI_FORMAT_BC2_UNORM) {
+        for (size_t x = 0; x < width; x += 4) {
+            decode_dx3_alpha_block(stream, context, x, y);
+            decode_color_block(stream, context, false, x, y);
+        }
+    }
+
+    if (format == DXGI_FORMAT_BC3_UNORM) {
+        for (size_t x = 0; x < width; x += 4) {
+            decode_dx5_alpha_block(stream, context, x, y);
+            decode_color_block(stream, context, false, x, y);
+        }
+    }
+}
+static void decode_bitmap(InputMemoryStream& stream, DDSLoadingContext& context, DXGIFormat format, u64 width, u64 height)
+{
+    Vector<u32> dxt_formats = { DXGI_FORMAT_BC1_UNORM, DXGI_FORMAT_BC2_UNORM, DXGI_FORMAT_BC3_UNORM };
+    if (dxt_formats.contains_slow(format)) {
+        for (u64 y = 0; y < height; y += 4) {
+            decode_dxt(stream, context, format, width, y);
+        }
+    }
+
+    // FIXME: Support more encodings (ATI, YUV, RAW, etc...).
+}
+
+static size_t get_minimum_bytes_for_mipmap(DXGIFormat format, u64 width, u64 height)
+{
+    u64 row_bytes {};
+    u64 row_count {};
+
+    if (is_block_compressed(format)) {
+        u64 width_in_blocks {};
+        u64 height_in_blocks {};
+
+        if (width > 0) {
+            width_in_blocks = max(static_cast<u64>(1), (width + 3u) / 4u);
+        }
+
+        if (height > 0) {
+            height_in_blocks = max(static_cast<u64>(1), (height + 3u) / 4u);
+        }
+
+        row_bytes = width_in_blocks * block_size(format);
+        row_count = height_in_blocks;
+        return row_bytes * row_count;
+    } else if (is_packed(format)) {
+        row_bytes = ((width + 1u) >> 1) * block_size(format);
+        row_count = height;
+        return row_bytes * row_count;
+    } else if (format == DXGI_FORMAT_NV11) {
+        row_bytes = ((width + 3u) >> 2) * 4u;
+        row_count = height * 2u;
+        return row_bytes * row_count;
+    } else if (is_planar(format)) {
+        row_bytes = ((width + 1u) >> 1) * block_size(format);
+        row_count = height + ((height + 1u) >> 1);
+        return (row_bytes * row_count) + (((row_bytes * row_count) + 1) >> 1);
+    } else {
+        u32 bpp = bits_per_pixel(format);
+
+        row_bytes = (width * bpp + 7u) / 8u;
+        row_count = height;
+        return row_bytes * row_count;
+    }
+}
+
+static bool decode_dds(DDSLoadingContext& context)
+{
+    InputMemoryStream stream({ context.data, context.data_size });
+
+    // All valid DDS files are at least 128 bytes long.
+    if (stream.remaining() < 128) {
+        dbgln_if(DDS_DEBUG, "File is too short for DDS");
+        context.state = DDSLoadingContext::State::Error;
+        return false;
+    }
+
+    u32 magic;
+    stream >> magic;
+
+    if (magic != create_four_cc('D', 'D', 'S', ' ')) {
+        dbgln_if(DDS_DEBUG, "Missing magic number");
+        context.state = DDSLoadingContext::State::Error;
+        return false;
+    }
+
+    stream >> context.header.size;
+    stream >> context.header.flags;
+    stream >> context.header.height;
+    stream >> context.header.width;
+    stream >> context.header.pitch;
+    stream >> context.header.depth;
+    stream >> context.header.mip_map_count;
+    // The bytes in context.header.reserved are unused, so we just skip over them (11 * 4 bytes).
+    stream.discard_or_error(44);
+    stream >> context.header.pixel_format.size;
+    stream >> context.header.pixel_format.flags;
+    stream >> context.header.pixel_format.four_cc;
+    stream >> context.header.pixel_format.rgb_bit_count;
+    stream >> context.header.pixel_format.r_bit_mask;
+    stream >> context.header.pixel_format.g_bit_mask;
+    stream >> context.header.pixel_format.b_bit_mask;
+    stream >> context.header.pixel_format.a_bit_mask;
+    stream >> context.header.caps1;
+    stream >> context.header.caps2;
+    stream >> context.header.caps3;
+    stream >> context.header.caps4;
+    stream >> context.header.reserved2;
+
+    if (context.header.size != 124) {
+        dbgln_if(DDS_DEBUG, "Header size is malformed");
+        context.state = DDSLoadingContext::State::Error;
+        return false;
+    }
+    if (context.header.pixel_format.size != 32) {
+        dbgln_if(DDS_DEBUG, "Pixel format size is malformed");
+        context.state = DDSLoadingContext::State::Error;
+        return false;
+    }
+
+    if ((context.header.pixel_format.flags & PixelFormatFlags::DDPF_FOURCC) == PixelFormatFlags::DDPF_FOURCC) {
+        if (context.header.pixel_format.four_cc == create_four_cc('D', 'X', '1', '0')) {
+            if (stream.bytes().size() < 148) {
+                dbgln_if(DDS_DEBUG, "DX10 header is too short");
+                context.state = DDSLoadingContext::State::Error;
+                return false;
+            }
+
+            u32 format {};
+            stream >> format;
+            context.header10.format = static_cast<DXGIFormat>(format);
+            stream >> context.header10.resource_dimension;
+            stream >> context.header10.misc_flag;
+            stream >> context.header10.array_size;
+            stream >> context.header10.misc_flag2;
+        }
+    }
+
+    if constexpr (DDS_DEBUG) {
+        context.dump_debug();
+    }
+
+    DXGIFormat format = get_format(context.header.pixel_format);
+
+    Vector<u32> supported_formats = { DXGI_FORMAT_BC1_UNORM, DXGI_FORMAT_BC2_UNORM, DXGI_FORMAT_BC3_UNORM };
+    if (!supported_formats.contains_slow(format)) {
+        dbgln_if(DDS_DEBUG, "Format of type {} is not supported at the moment", static_cast<u32>(format));
+        context.state = DDSLoadingContext::State::Error;
+        return false;
+    }
+
+    for (size_t mipmap_level = 0; mipmap_level < max(context.header.mip_map_count, 1u); mipmap_level++) {
+        u64 width = get_width(context.header, mipmap_level);
+        u64 height = get_height(context.header, mipmap_level);
+
+        u64 needed_bytes = get_minimum_bytes_for_mipmap(format, width, height);
+        dbgln_if(DDS_DEBUG, "There are {} bytes remaining, we need {} for mipmap level {} of the image", stream.remaining(), needed_bytes, mipmap_level);
+        VERIFY(stream.remaining() >= needed_bytes);
+
+        context.bitmap = Bitmap::create_purgeable(BitmapFormat::BGRA8888, { width, height });
+
+        decode_bitmap(stream, context, format, width, height);
+
+        // We support parsing mipmaps, but we only care about the largest one :^) (Atleast for now)
+        break;
+    }
+
+    context.state = DDSLoadingContext::State::BitmapDecoded;
+
+    return true;
+}
+
+void DDSLoadingContext::dump_debug()
+{
+    StringBuilder builder;
+
+    builder.append("\nDDS:\n");
+    builder.appendff("\tHeader Size: {}\n", header.size);
+
+    builder.append("\tFlags:");
+    if ((header.flags & DDSFlags::DDSD_CAPS) == DDSFlags::DDSD_CAPS)
+        builder.append(" DDSD_CAPS");
+    if ((header.flags & DDSFlags::DDSD_HEIGHT) == DDSFlags::DDSD_HEIGHT)
+        builder.append(" DDSD_HEIGHT");
+    if ((header.flags & DDSFlags::DDSD_WIDTH) == DDSFlags::DDSD_WIDTH)
+        builder.append(" DDSD_WIDTH");
+    if ((header.flags & DDSFlags::DDSD_PITCH) == DDSFlags::DDSD_PITCH)
+        builder.append(" DDSD_PITCH");
+    if ((header.flags & DDSFlags::DDSD_PIXELFORMAT) == DDSFlags::DDSD_PIXELFORMAT)
+        builder.append(" DDSD_PIXELFORMAT");
+    if ((header.flags & DDSFlags::DDSD_MIPMAPCOUNT) == DDSFlags::DDSD_MIPMAPCOUNT)
+        builder.append(" DDSD_MIPMAPCOUNT");
+    if ((header.flags & DDSFlags::DDSD_LINEARSIZE) == DDSFlags::DDSD_LINEARSIZE)
+        builder.append(" DDSD_LINEARSIZE");
+    if ((header.flags & DDSFlags::DDSD_DEPTH) == DDSFlags::DDSD_DEPTH)
+        builder.append(" DDSD_DEPTH");
+    builder.append("\n");
+
+    builder.appendff("\tHeight: {}\n", header.height);
+    builder.appendff("\tWidth: {}\n", header.width);
+    builder.appendff("\tPitch: {}\n", header.pitch);
+    builder.appendff("\tDepth: {}\n", header.depth);
+    builder.appendff("\tMipmap Count: {}\n", header.mip_map_count);
+
+    builder.append("\tCaps:");
+    if ((header.caps1 & Caps1Flags::DDSCAPS_COMPLEX) == Caps1Flags::DDSCAPS_COMPLEX)
+        builder.append(" DDSCAPS_COMPLEX");
+    if ((header.caps1 & Caps1Flags::DDSCAPS_MIPMAP) == Caps1Flags::DDSCAPS_MIPMAP)
+        builder.append(" DDSCAPS_MIPMAP");
+    if ((header.caps1 & Caps1Flags::DDSCAPS_TEXTURE) == Caps1Flags::DDSCAPS_TEXTURE)
+        builder.append(" DDSCAPS_TEXTURE");
+    builder.append("\n");
+
+    builder.append("\tCaps2:");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP) == Caps2Flags::DDSCAPS2_CUBEMAP)
+        builder.append(" DDSCAPS2_CUBEMAP");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEX) == Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEX)
+        builder.append(" DDSCAPS2_CUBEMAP_POSITIVEX");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEX) == Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEX)
+        builder.append(" DDSCAPS2_CUBEMAP_NEGATIVEX");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEY) == Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEY)
+        builder.append(" DDSCAPS2_CUBEMAP_POSITIVEY");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEY) == Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEY)
+        builder.append(" DDSCAPS2_CUBEMAP_NEGATIVEY");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEZ) == Caps2Flags::DDSCAPS2_CUBEMAP_POSITIVEZ)
+        builder.append(" DDSCAPS2_CUBEMAP_POSITIVEZ");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEZ) == Caps2Flags::DDSCAPS2_CUBEMAP_NEGATIVEZ)
+        builder.append(" DDSCAPS2_CUBEMAP_NEGATIVEZ");
+    if ((header.caps2 & Caps2Flags::DDSCAPS2_VOLUME) == Caps2Flags::DDSCAPS2_VOLUME)
+        builder.append(" DDSCAPS2_VOLUME");
+    builder.append("\n");
+
+    builder.append("Pixel Format:\n");
+    builder.appendff("\tStruct Size: {}\n", header.pixel_format.size);
+
+    builder.append("\tFlags:");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_ALPHAPIXELS) == PixelFormatFlags::DDPF_ALPHAPIXELS)
+        builder.append(" DDPF_ALPHAPIXELS");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_ALPHA) == PixelFormatFlags::DDPF_ALPHA)
+        builder.append(" DDPF_ALPHA");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_FOURCC) == PixelFormatFlags::DDPF_FOURCC)
+        builder.append(" DDPF_FOURCC");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_PALETTEINDEXED8) == PixelFormatFlags::DDPF_PALETTEINDEXED8)
+        builder.append(" DDPF_PALETTEINDEXED8");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_RGB) == PixelFormatFlags::DDPF_RGB)
+        builder.append(" DDPF_RGB");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_YUV) == PixelFormatFlags::DDPF_YUV)
+        builder.append(" DDPF_YUV");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_LUMINANCE) == PixelFormatFlags::DDPF_LUMINANCE)
+        builder.append(" DDPF_LUMINANCE");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_BUMPDUDV) == PixelFormatFlags::DDPF_BUMPDUDV)
+        builder.append(" DDPF_BUMPDUDV");
+    if ((header.pixel_format.flags & PixelFormatFlags::DDPF_NORMAL) == PixelFormatFlags::DDPF_NORMAL)
+        builder.append(" DDPF_NORMAL");
+    builder.append("\n");
+
+    builder.append("\tFour CC: ");
+    builder.appendff("{:c}", (header.pixel_format.four_cc >> (8 * 0)) & 0xFF);
+    builder.appendff("{:c}", (header.pixel_format.four_cc >> (8 * 1)) & 0xFF);
+    builder.appendff("{:c}", (header.pixel_format.four_cc >> (8 * 2)) & 0xFF);
+    builder.appendff("{:c}", (header.pixel_format.four_cc >> (8 * 3)) & 0xFF);
+    builder.append("\n");
+    builder.appendff("\tRGB Bit Count: {}\n", header.pixel_format.rgb_bit_count);
+    builder.appendff("\tR Bit Mask: {}\n", header.pixel_format.r_bit_mask);
+    builder.appendff("\tG Bit Mask: {}\n", header.pixel_format.g_bit_mask);
+    builder.appendff("\tB Bit Mask: {}\n", header.pixel_format.b_bit_mask);
+    builder.appendff("\tA Bit Mask: {}\n", header.pixel_format.a_bit_mask);
+
+    builder.append("DDS10:\n");
+    builder.appendff("\tFormat: {}\n", static_cast<u32>(header10.format));
+
+    builder.append("\tResource Dimension:");
+    if ((header10.resource_dimension & ResourceDimensions::DDS_DIMENSION_UNKNOWN) == ResourceDimensions::DDS_DIMENSION_UNKNOWN)
+        builder.append(" DDS_DIMENSION_UNKNOWN");
+    if ((header10.resource_dimension & ResourceDimensions::DDS_DIMENSION_BUFFER) == ResourceDimensions::DDS_DIMENSION_BUFFER)
+        builder.append(" DDS_DIMENSION_BUFFER");
+    if ((header10.resource_dimension & ResourceDimensions::DDS_DIMENSION_TEXTURE1D) == ResourceDimensions::DDS_DIMENSION_TEXTURE1D)
+        builder.append(" DDS_DIMENSION_TEXTURE1D");
+    if ((header10.resource_dimension & ResourceDimensions::DDS_DIMENSION_TEXTURE2D) == ResourceDimensions::DDS_DIMENSION_TEXTURE2D)
+        builder.append(" DDS_DIMENSION_TEXTURE2D");
+    if ((header10.resource_dimension & ResourceDimensions::DDS_DIMENSION_TEXTURE3D) == ResourceDimensions::DDS_DIMENSION_TEXTURE3D)
+        builder.append(" DDS_DIMENSION_TEXTURE3D");
+    builder.append("\n");
+
+    builder.appendff("\tArray Size: {}\n", header10.array_size);
+
+    builder.append("\tMisc Flags:");
+    if ((header10.misc_flag & MiscFlags::DDS_RESOURCE_MISC_TEXTURECUBE) == MiscFlags::DDS_RESOURCE_MISC_TEXTURECUBE)
+        builder.append(" DDS_RESOURCE_MISC_TEXTURECUBE");
+    builder.append("\n");
+
+    builder.append("\tMisc Flags 2:");
+    if ((header10.misc_flag2 & Misc2Flags::DDS_ALPHA_MODE_UNKNOWN) == Misc2Flags::DDS_ALPHA_MODE_UNKNOWN)
+        builder.append(" DDS_ALPHA_MODE_UNKNOWN");
+    if ((header10.misc_flag2 & Misc2Flags::DDS_ALPHA_MODE_STRAIGHT) == Misc2Flags::DDS_ALPHA_MODE_STRAIGHT)
+        builder.append(" DDS_ALPHA_MODE_STRAIGHT");
+    if ((header10.misc_flag2 & Misc2Flags::DDS_ALPHA_MODE_PREMULTIPLIED) == Misc2Flags::DDS_ALPHA_MODE_PREMULTIPLIED)
+        builder.append(" DDS_ALPHA_MODE_PREMULTIPLIED");
+    if ((header10.misc_flag2 & Misc2Flags::DDS_ALPHA_MODE_OPAQUE) == Misc2Flags::DDS_ALPHA_MODE_OPAQUE)
+        builder.append(" DDS_ALPHA_MODE_OPAQUE");
+    if ((header10.misc_flag2 & Misc2Flags::DDS_ALPHA_MODE_CUSTOM) == Misc2Flags::DDS_ALPHA_MODE_CUSTOM)
+        builder.append(" DDS_ALPHA_MODE_CUSTOM");
+    builder.append("\n");
+
+    dbgln("{}", builder.to_string());
+}
+
+static RefPtr<Gfx::Bitmap> load_dds_impl(const u8* data, size_t length)
+{
+    DDSLoadingContext context;
+    context.data = data;
+    context.data_size = length;
+
+    if (!decode_dds(context))
+        return nullptr;
+
+    return context.bitmap;
+}
+
+RefPtr<Gfx::Bitmap> load_dds(String const& path)
+{
+    auto file_or_error = MappedFile::map(path);
+    if (file_or_error.is_error())
+        return nullptr;
+    auto bitmap = load_dds_impl((const u8*)file_or_error.value()->data(), file_or_error.value()->size());
+    if (bitmap)
+        bitmap->set_mmap_name(String::formatted("Gfx::Bitmap [{}] - Decoded DDS: {}", bitmap->size(), LexicalPath::canonicalized_path(path)));
+    return bitmap;
+}
+
+RefPtr<Gfx::Bitmap> load_dds_from_memory(const u8* data, size_t length)
+{
+    auto bitmap = load_dds_impl(data, length);
+    if (bitmap)
+        bitmap->set_mmap_name(String::formatted("Gfx::Bitmap [{}] - Decoded DDS: <memory>", bitmap->size()));
+    return bitmap;
+}
+
+DDSImageDecoderPlugin::DDSImageDecoderPlugin(const u8* data, size_t size)
+{
+    m_context = make<DDSLoadingContext>();
+    m_context->data = data;
+    m_context->data_size = size;
+}
+
+DDSImageDecoderPlugin::~DDSImageDecoderPlugin()
+{
+}
+
+IntSize DDSImageDecoderPlugin::size()
+{
+    if (m_context->state == DDSLoadingContext::State::Error)
+        return {};
+
+    if (m_context->state == DDSLoadingContext::State::BitmapDecoded)
+        return { m_context->header.width, m_context->header.height };
+
+    return {};
+}
+
+RefPtr<Gfx::Bitmap> DDSImageDecoderPlugin::bitmap()
+{
+    if (m_context->state == DDSLoadingContext::State::Error)
+        return nullptr;
+
+    if (m_context->state < DDSLoadingContext::State::BitmapDecoded) {
+        bool success = decode_dds(*m_context);
+        if (!success)
+            return nullptr;
+    }
+
+    VERIFY(m_context->bitmap);
+    return m_context->bitmap;
+}
+
+void DDSImageDecoderPlugin::set_volatile()
+{
+    if (m_context->bitmap)
+        m_context->bitmap->set_volatile();
+}
+
+bool DDSImageDecoderPlugin::set_nonvolatile()
+{
+    if (!m_context->bitmap)
+        return false;
+    return m_context->bitmap->set_nonvolatile();
+}
+
+bool DDSImageDecoderPlugin::sniff()
+{
+    // The header is always atleast 128 bytes, so if the file is smaller, it cant be a DDS.
+    return m_context->data_size > 128
+        && m_context->data[0] == 0x44
+        && m_context->data[1] == 0x44
+        && m_context->data[2] == 0x53
+        && m_context->data[3] == 0x20;
+}
+
+bool DDSImageDecoderPlugin::is_animated()
+{
+    return false;
+}
+
+size_t DDSImageDecoderPlugin::loop_count()
+{
+    return 0;
+}
+
+size_t DDSImageDecoderPlugin::frame_count()
+{
+    return 1;
+}
+
+ImageFrameDescriptor DDSImageDecoderPlugin::frame([[maybe_unused]] size_t i)
+{
+    // We have "frames", but they are all the same image, so lets just use the largest version.
+    return { bitmap(), 0 };
+}
+}
diff --git a/Userland/Libraries/LibGfx/DDSLoader.h b/Userland/Libraries/LibGfx/DDSLoader.h
new file mode 100644
index 0000000000..8b5eab464b
--- /dev/null
+++ b/Userland/Libraries/LibGfx/DDSLoader.h
@@ -0,0 +1,260 @@
+/*
+ * Copyright (c) 2021, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibGfx/Bitmap.h>
+#include <LibGfx/ImageDecoder.h>
+
+namespace Gfx {
+
+enum MiscFlags : u32 {
+    DDS_RESOURCE_MISC_TEXTURECUBE = 0x4,
+};
+
+enum Misc2Flags : u32 {
+    DDS_ALPHA_MODE_UNKNOWN = 0x0,
+    DDS_ALPHA_MODE_STRAIGHT = 0x1,
+    DDS_ALPHA_MODE_PREMULTIPLIED = 0x2,
+    DDS_ALPHA_MODE_OPAQUE = 0x3,
+    DDS_ALPHA_MODE_CUSTOM = 0x4,
+};
+
+enum Caps1Flags : u32 {
+    DDSCAPS_COMPLEX = 0x8,
+    DDSCAPS_TEXTURE = 0x1000,
+    DDSCAPS_MIPMAP = 0x400000,
+};
+
+enum Caps2Flags : u32 {
+    DDSCAPS2_CUBEMAP = 0x200,
+    DDSCAPS2_CUBEMAP_POSITIVEX = 0x400,
+    DDSCAPS2_CUBEMAP_NEGATIVEX = 0x800,
+    DDSCAPS2_CUBEMAP_POSITIVEY = 0x1000,
+    DDSCAPS2_CUBEMAP_NEGATIVEY = 0x2000,
+    DDSCAPS2_CUBEMAP_POSITIVEZ = 0x4000,
+    DDSCAPS2_CUBEMAP_NEGATIVEZ = 0x8000,
+    DDSCAPS2_VOLUME = 0x200000,
+};
+
+enum ResourceDimensions : u32 {
+    DDS_DIMENSION_UNKNOWN,
+    DDS_DIMENSION_BUFFER,
+    DDS_DIMENSION_TEXTURE1D = 2,
+    DDS_DIMENSION_TEXTURE2D = 3,
+    DDS_DIMENSION_TEXTURE3D = 4,
+};
+
+enum DXGIFormat : u32 {
+    DXGI_FORMAT_UNKNOWN = 0,
+    DXGI_FORMAT_R32G32B32A32_TYPELESS,
+    DXGI_FORMAT_R32G32B32A32_FLOAT,
+    DXGI_FORMAT_R32G32B32A32_UINT,
+    DXGI_FORMAT_R32G32B32A32_SINT,
+    DXGI_FORMAT_R32G32B32_TYPELESS,
+    DXGI_FORMAT_R32G32B32_FLOAT,
+    DXGI_FORMAT_R32G32B32_UINT,
+    DXGI_FORMAT_R32G32B32_SINT,
+    DXGI_FORMAT_R16G16B16A16_TYPELESS,
+    DXGI_FORMAT_R16G16B16A16_FLOAT,
+    DXGI_FORMAT_R16G16B16A16_UNORM,
+    DXGI_FORMAT_R16G16B16A16_UINT,
+    DXGI_FORMAT_R16G16B16A16_SNORM,
+    DXGI_FORMAT_R16G16B16A16_SINT,
+    DXGI_FORMAT_R32G32_TYPELESS,
+    DXGI_FORMAT_R32G32_FLOAT,
+    DXGI_FORMAT_R32G32_UINT,
+    DXGI_FORMAT_R32G32_SINT,
+    DXGI_FORMAT_R32G8X24_TYPELESS,
+    DXGI_FORMAT_D32_FLOAT_S8X24_UINT,
+    DXGI_FORMAT_R32_FLOAT_X8X24_TYPELESS,
+    DXGI_FORMAT_X32_TYPELESS_G8X24_UINT,
+    DXGI_FORMAT_R10G10B10A2_TYPELESS,
+    DXGI_FORMAT_R10G10B10A2_UNORM,
+    DXGI_FORMAT_R10G10B10A2_UINT,
+    DXGI_FORMAT_R11G11B10_FLOAT,
+    DXGI_FORMAT_R8G8B8A8_TYPELESS,
+    DXGI_FORMAT_R8G8B8A8_UNORM,
+    DXGI_FORMAT_R8G8B8A8_UNORM_SRGB,
+    DXGI_FORMAT_R8G8B8A8_UINT,
+    DXGI_FORMAT_R8G8B8A8_SNORM,
+    DXGI_FORMAT_R8G8B8A8_SINT,
+    DXGI_FORMAT_R16G16_TYPELESS,
+    DXGI_FORMAT_R16G16_FLOAT,
+    DXGI_FORMAT_R16G16_UNORM,
+    DXGI_FORMAT_R16G16_UINT,
+    DXGI_FORMAT_R16G16_SNORM,
+    DXGI_FORMAT_R16G16_SINT,
+    DXGI_FORMAT_R32_TYPELESS,
+    DXGI_FORMAT_D32_FLOAT,
+    DXGI_FORMAT_R32_FLOAT,
+    DXGI_FORMAT_R32_UINT,
+    DXGI_FORMAT_R32_SINT,
+    DXGI_FORMAT_R24G8_TYPELESS,
+    DXGI_FORMAT_D24_UNORM_S8_UINT,
+    DXGI_FORMAT_R24_UNORM_X8_TYPELESS,
+    DXGI_FORMAT_X24_TYPELESS_G8_UINT,
+    DXGI_FORMAT_R8G8_TYPELESS,
+    DXGI_FORMAT_R8G8_UNORM,
+    DXGI_FORMAT_R8G8_UINT,
+    DXGI_FORMAT_R8G8_SNORM,
+    DXGI_FORMAT_R8G8_SINT,
+    DXGI_FORMAT_R16_TYPELESS,
+    DXGI_FORMAT_R16_FLOAT,
+    DXGI_FORMAT_D16_UNORM,
+    DXGI_FORMAT_R16_UNORM,
+    DXGI_FORMAT_R16_UINT,
+    DXGI_FORMAT_R16_SNORM,
+    DXGI_FORMAT_R16_SINT,
+    DXGI_FORMAT_R8_TYPELESS,
+    DXGI_FORMAT_R8_UNORM,
+    DXGI_FORMAT_R8_UINT,
+    DXGI_FORMAT_R8_SNORM,
+    DXGI_FORMAT_R8_SINT,
+    DXGI_FORMAT_A8_UNORM,
+    DXGI_FORMAT_R1_UNORM,
+    DXGI_FORMAT_R9G9B9E5_SHAREDEXP,
+    DXGI_FORMAT_R8G8_B8G8_UNORM,
+    DXGI_FORMAT_G8R8_G8B8_UNORM,
+    DXGI_FORMAT_BC1_TYPELESS,
+    DXGI_FORMAT_BC1_UNORM,
+    DXGI_FORMAT_BC1_UNORM_SRGB,
+    DXGI_FORMAT_BC2_TYPELESS,
+    DXGI_FORMAT_BC2_UNORM,
+    DXGI_FORMAT_BC2_UNORM_SRGB,
+    DXGI_FORMAT_BC3_TYPELESS,
+    DXGI_FORMAT_BC3_UNORM,
+    DXGI_FORMAT_BC3_UNORM_SRGB,
+    DXGI_FORMAT_BC4_TYPELESS,
+    DXGI_FORMAT_BC4_UNORM,
+    DXGI_FORMAT_BC4_SNORM,
+    DXGI_FORMAT_BC5_TYPELESS,
+    DXGI_FORMAT_BC5_UNORM,
+    DXGI_FORMAT_BC5_SNORM,
+    DXGI_FORMAT_B5G6R5_UNORM,
+    DXGI_FORMAT_B5G5R5A1_UNORM,
+    DXGI_FORMAT_B8G8R8A8_UNORM,
+    DXGI_FORMAT_B8G8R8X8_UNORM,
+    DXGI_FORMAT_R10G10B10_XR_BIAS_A2_UNORM,
+    DXGI_FORMAT_B8G8R8A8_TYPELESS,
+    DXGI_FORMAT_B8G8R8A8_UNORM_SRGB,
+    DXGI_FORMAT_B8G8R8X8_TYPELESS,
+    DXGI_FORMAT_B8G8R8X8_UNORM_SRGB,
+    DXGI_FORMAT_BC6H_TYPELESS,
+    DXGI_FORMAT_BC6H_UF16,
+    DXGI_FORMAT_BC6H_SF16,
+    DXGI_FORMAT_BC7_TYPELESS,
+    DXGI_FORMAT_BC7_UNORM,
+    DXGI_FORMAT_BC7_UNORM_SRGB,
+    DXGI_FORMAT_AYUV,
+    DXGI_FORMAT_Y410,
+    DXGI_FORMAT_Y416,
+    DXGI_FORMAT_NV12,
+    DXGI_FORMAT_P010,
+    DXGI_FORMAT_P016,
+    DXGI_FORMAT_420_OPAQUE,
+    DXGI_FORMAT_YUY2,
+    DXGI_FORMAT_Y210,
+    DXGI_FORMAT_Y216,
+    DXGI_FORMAT_NV11,
+    DXGI_FORMAT_AI44,
+    DXGI_FORMAT_IA44,
+    DXGI_FORMAT_P8,
+    DXGI_FORMAT_A8P8,
+    DXGI_FORMAT_B4G4R4A4_UNORM,
+    DXGI_FORMAT_P208,
+    DXGI_FORMAT_V208,
+    DXGI_FORMAT_V408,
+    DXGI_FORMAT_SAMPLER_FEEDBACK_MIN_MIP_OPAQUE,
+    DXGI_FORMAT_SAMPLER_FEEDBACK_MIP_REGION_USED_OPAQUE,
+    DXGI_FORMAT_FORCE_UINT
+};
+
+enum DDSFlags : u32 {
+    DDSD_CAPS = 0x1,
+    DDSD_HEIGHT = 0x2,
+    DDSD_WIDTH = 0x4,
+    DDSD_PITCH = 0x8,
+    DDSD_PIXELFORMAT = 0x1000,
+    DDSD_MIPMAPCOUNT = 0x20000,
+    DDSD_LINEARSIZE = 0x80000,
+    DDSD_DEPTH = 0x800000,
+};
+
+enum PixelFormatFlags : u32 {
+    DDPF_ALPHAPIXELS = 0x1,
+    DDPF_ALPHA = 0x2,
+    DDPF_FOURCC = 0x4,
+    DDPF_PALETTEINDEXED8 = 0x20,
+    DDPF_RGB = 0x40,
+    DDPF_YUV = 0x200,
+    DDPF_LUMINANCE = 0x20000,
+    DDPF_BUMPDUDV = 0x80000,
+    DDPF_NORMAL = 0x80000000,
+};
+
+struct DDSPixelFormat {
+    u32 size {};
+    u32 flags {};
+    u32 four_cc {};
+    u32 rgb_bit_count {};
+    u32 r_bit_mask {};
+    u32 g_bit_mask {};
+    u32 b_bit_mask {};
+    u32 a_bit_mask {};
+};
+
+struct DDSHeader {
+    u32 size {};
+    u32 flags {};
+    u32 height {};
+    u32 width {};
+    u32 pitch {};
+    u32 depth {};
+    u32 mip_map_count {};
+    u32 reserved[11];
+    DDSPixelFormat pixel_format;
+    u32 caps1 {};
+    u32 caps2 {};
+    u32 caps3 {};
+    u32 caps4 {};
+    u32 reserved2 {};
+};
+
+struct DDSHeaderDXT10 {
+    DXGIFormat format {};
+    u32 resource_dimension {};
+    u32 misc_flag {};
+    u32 array_size {};
+    u32 misc_flag2 {};
+};
+
+RefPtr<Gfx::Bitmap> load_dds(String const& path);
+RefPtr<Gfx::Bitmap> load_dds_from_memory(const u8*, size_t);
+
+struct DDSLoadingContext;
+
+class DDSImageDecoderPlugin final : public ImageDecoderPlugin {
+public:
+    virtual ~DDSImageDecoderPlugin() override;
+    DDSImageDecoderPlugin(const u8*, size_t);
+
+    virtual IntSize size() override;
+    virtual RefPtr<Gfx::Bitmap> bitmap() override;
+    virtual void set_volatile() override;
+    [[nodiscard]] virtual bool set_nonvolatile() override;
+    virtual bool sniff() override;
+    virtual bool is_animated() override;
+    virtual size_t loop_count() override;
+    virtual size_t frame_count() override;
+    virtual ImageFrameDescriptor frame(size_t i) override;
+
+private:
+    OwnPtr<DDSLoadingContext> m_context;
+    void dump_debug();
+};
+
+}
diff --git a/Userland/Libraries/LibGfx/ImageDecoder.cpp b/Userland/Libraries/LibGfx/ImageDecoder.cpp
index 30e21a07c2..3e0690189c 100644
--- a/Userland/Libraries/LibGfx/ImageDecoder.cpp
+++ b/Userland/Libraries/LibGfx/ImageDecoder.cpp
@@ -5,6 +5,7 @@
  */
 
 #include <LibGfx/BMPLoader.h>
+#include <LibGfx/DDSLoader.h>
 #include <LibGfx/GIFLoader.h>
 #include <LibGfx/ICOLoader.h>
 #include <LibGfx/ImageDecoder.h>
@@ -50,6 +51,10 @@ ImageDecoder::ImageDecoder(const u8* data, size_t size)
     if (m_plugin->sniff())
         return;
 
+    m_plugin = make<DDSImageDecoderPlugin>(data, size);
+    if (m_plugin->sniff())
+        return;
+
     m_plugin = nullptr;
 }