Added sRGB variants of BC1/BC2/BC3 compression formats.

doc/changelog.dox

@@ -50,9 +50,10 @@ See also:
 -   New @ref BasicMutableImageView "MutableImageView*D" and
     @ref BasicMutableCompressedImageView "MutableCompressedImageView*D" types
     for mutable views onto image data
--   Added ETC2 and EAC formats to @ref CompressedPixelFormat as well as their
-    conversion to corresponding GL/Vulkan in @ref GL::compressedPixelFormat()
-    and @ref Vk::vkFormat(Magnum::CompressedPixelFormat)
+-   Added sRGB BCn, ETC2 and EAC formats to @ref CompressedPixelFormat as well
+    as their conversion to corresponding GL/Vulkan in
+    @ref GL::compressedPixelFormat() and
+    @ref Vk::vkFormat(Magnum::CompressedPixelFormat)
 
 @subsubsection changelog-latest-new-audio Audio library
 
@@ -157,6 +158,11 @@ See also:
     texture classes now can read the pixels into
     @ref BasicMutableImageView "MutableImageView*D" and
     @ref BasicMutableCompressedImageView "MutableCompressedImageView*D" as well
+-   Added sRGB S3TC formats as defined by the
+    @gl_extension{EXT,texture_sRGB} desktop,
+    @gl_extension{EXT,texture_compression_s3tc_srgb} ES and
+    @webgl_extension{WEBGL,compressed_texture_s3tc_srgb} WebGL extension to
+    @ref GL::CompressedPixelFormat and @ref GL::TextureFormat
 
 @subsubsection changelog-latest-new-math Math library
 

doc/opengl-support.dox

@@ -455,7 +455,7 @@ Extension                                   | Status
 @gl_extension{EXT,texture_compression_s3tc} | done
 @gl_extension{EXT,shader_integer_mix}       | done (shading language only)
 @gl_extension{EXT,polygon_offset_clamp}     | |
-@gl_extension{EXT,texture_compression_s3tc_srgb} | |
+@gl_extension{EXT,texture_compression_s3tc_srgb} | done
 @gl_extension2{KHR,texture_compression_astc_hdr,KHR_texture_compression_astc_hdr} | done
 @gl_extension2{KHR,blend_equation_advanced_coherent,KHR_blend_equation_advanced} | done
 @gl_extension{KHR,context_flush_control}    | |
@@ -525,7 +525,7 @@ Extension                                   | Status
 @webgl_extension{EXT,color_buffer_float}    | |
 @webgl_extension{OES,texture_float_linear}  | done
 @webgl_extension{WEBGL,compressed_texture_s3tc} | done
-@webgl_extension{WEBGL,compressed_texture_s3tc_srgb} |
+@webgl_extension{WEBGL,compressed_texture_s3tc_srgb} | done
 
 @section opengl-unsupported Unsupported OpenGL features
 

src/Magnum/GL/AbstractTexture.cpp

@@ -665,6 +665,7 @@ PixelFormat pixelFormatForInternalFormat(const TextureFormat internalFormat) {
         #ifndef MAGNUM_TARGET_GLES2
         case TextureFormat::SRGB8:
         #endif
+        case TextureFormat::CompressedSRGBS3tcDxt1:
             #ifndef MAGNUM_TARGET_GLES2
             return PixelFormat::RGB;
             #else
@@ -759,6 +760,9 @@ PixelFormat pixelFormatForInternalFormat(const TextureFormat internalFormat) {
         #if !(defined(MAGNUM_TARGET_WEBGL) && defined(MAGNUM_TARGET_GLES2))
         case TextureFormat::SRGB8Alpha8:
         #endif
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt1:
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt3:
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt5:
             #ifndef MAGNUM_TARGET_GLES2
             return PixelFormat::RGBA;
             #else
@@ -879,9 +883,13 @@ PixelType pixelTypeForInternalFormat(const TextureFormat internalFormat) {
         case TextureFormat::CompressedSignedRG11Eac:
         #endif
         case TextureFormat::CompressedRGBS3tcDxt1:
+        case TextureFormat::CompressedSRGBS3tcDxt1:
         case TextureFormat::CompressedRGBAS3tcDxt1:
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt1:
         case TextureFormat::CompressedRGBAS3tcDxt3:
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt3:
         case TextureFormat::CompressedRGBAS3tcDxt5:
+        case TextureFormat::CompressedSRGBAlphaS3tcDxt5:
         #ifndef MAGNUM_TARGET_WEBGL
         case TextureFormat::CompressedRGBAAstc4x4:
         case TextureFormat::CompressedSRGB8Alpha8Astc4x4:

src/Magnum/GL/Implementation/compressedPixelFormatMapping.hpp

@@ -26,9 +26,13 @@
 /* See Magnum/GL/PixelFormat.cpp and Magnum/GL/Test/PixelFormatTest.cpp */
 #ifdef _c
 _c(Bc1RGBUnorm, RGBS3tcDxt1)
+_c(Bc1RGBSrgb, SRGBS3tcDxt1)
 _c(Bc1RGBAUnorm, RGBAS3tcDxt1)
+_c(Bc1RGBASrgb, SRGBAlphaS3tcDxt1)
 _c(Bc2RGBAUnorm, RGBAS3tcDxt3)
+_c(Bc2RGBASrgb, SRGBAlphaS3tcDxt3)
 _c(Bc3RGBAUnorm, RGBAS3tcDxt5)
+_c(Bc3RGBASrgb, SRGBAlphaS3tcDxt5)
 #ifndef MAGNUM_TARGET_GLES2
 _c(EacR11Unorm, R11Eac)
 _c(EacR11Snorm, SignedR11Eac)

src/Magnum/GL/PixelFormat.cpp

@@ -425,9 +425,13 @@ Debug& operator<<(Debug& debug, const CompressedPixelFormat value) {
         _c(SignedRG11Eac)
         #endif
         _c(RGBS3tcDxt1)
+        _c(SRGBS3tcDxt1)
         _c(RGBAS3tcDxt1)
+        _c(SRGBAlphaS3tcDxt1)
         _c(RGBAS3tcDxt3)
+        _c(SRGBAlphaS3tcDxt3)
         _c(RGBAS3tcDxt5)
+        _c(SRGBAlphaS3tcDxt5)
         #ifndef MAGNUM_TARGET_WEBGL
         _c(RGBAAstc4x4)
         _c(SRGB8Alpha8Astc4x4)

src/Magnum/GL/PixelFormat.h

@@ -899,6 +899,15 @@ enum class CompressedPixelFormat: GLenum {
      */
     RGBS3tcDxt1 = GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
 
+    /**
+     * S3TC DXT1 compressed sRGB. **Available only for 2D, 2D array, cube map
+     * and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    SRGBS3tcDxt1 = GL_COMPRESSED_SRGB_S3TC_DXT1_EXT,
+
     /**
      * S3TC DXT1 compressed RGBA. **Available only for 2D, 2D array, cube map
      * and cube map array textures.**
@@ -908,6 +917,15 @@ enum class CompressedPixelFormat: GLenum {
      */
     RGBAS3tcDxt1 = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
 
+    /**
+     * S3TC DXT1 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    SRGBAlphaS3tcDxt1 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT,
+
     /**
      * S3TC DXT3 compressed RGBA. **Available only for 2D, 2D array, cube map
      * and cube map array textures.**
@@ -917,6 +935,15 @@ enum class CompressedPixelFormat: GLenum {
      */
     RGBAS3tcDxt3 = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
 
+    /**
+     * S3TC DXT3 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    SRGBAlphaS3tcDxt3 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT,
+
     /**
      * S3TC DXT5 compressed RGBA. **Available only for 2D, 2D array, cube map
      * and cube map array textures.**
@@ -926,6 +953,15 @@ enum class CompressedPixelFormat: GLenum {
      */
     RGBAS3tcDxt5 = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
 
+    /**
+     * S3TC DXT5 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    SRGBAlphaS3tcDxt5 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT,
+
     #ifndef MAGNUM_TARGET_WEBGL
     /**
      * ASTC compressed RGBA with 4x4 blocks. **Available only on 2D, 3D, 2D

src/Magnum/GL/TextureFormat.h

@@ -1201,6 +1201,15 @@ enum class TextureFormat: GLenum {
      */
     CompressedRGBS3tcDxt1 = GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
 
+    /**
+     * S3TC DXT1 compressed sRGB. **Available only for 2D, 2D array, cube map
+     * and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    CompressedSRGBS3tcDxt1 = GL_COMPRESSED_SRGB_S3TC_DXT1_EXT,
+
     /**
      * S3TC DXT1 compressed RGBA. **Available only on 2D, 2D array, cube map
      * and cube map array textures.**
@@ -1210,6 +1219,15 @@ enum class TextureFormat: GLenum {
      */
     CompressedRGBAS3tcDxt1 = GL_COMPRESSED_RGBA_S3TC_DXT1_EXT,
 
+    /**
+     * S3TC DXT1 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    CompressedSRGBAlphaS3tcDxt1 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT,
+
     /**
      * S3TC DXT3 compressed RGBA. **Available only on 2D, 2D array, cube map
      * and cube map array textures.**
@@ -1219,6 +1237,15 @@ enum class TextureFormat: GLenum {
      */
     CompressedRGBAS3tcDxt3 = GL_COMPRESSED_RGBA_S3TC_DXT3_EXT,
 
+    /**
+     * S3TC DXT3 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    CompressedSRGBAlphaS3tcDxt3 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT,
+
     /**
      * S3TC DXT5 compressed RGBA. **Available only on 2D, 2D array, cube map
      * and cube map array textures.**
@@ -1228,6 +1255,15 @@ enum class TextureFormat: GLenum {
      */
     CompressedRGBAS3tcDxt5 = GL_COMPRESSED_RGBA_S3TC_DXT5_EXT,
 
+    /**
+     * S3TC DXT5 compressed sRGB + linear alpha. **Available only for 2D, 2D
+     * array, cube map and cube map array textures.**
+     * @requires_extension Extension @gl_extension{EXT,texture_compression_s3tc}
+     * @requires_es_extension Extension @gl_extension{EXT,texture_compression_s3tc_srgb}
+     * @requires_webgl_extension Extension @webgl_extension{WEBGL,compressed_texture_s3tc_srgb}
+     */
+    CompressedSRGBAlphaS3tcDxt5 = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT,
+
     #ifndef MAGNUM_TARGET_WEBGL
     /**
      * ASTC compressed RGBA with 4x4 blocks. **Available only on 2D, 3D, 2D

src/Magnum/PixelFormat.cpp

@@ -189,9 +189,13 @@ Debug& operator<<(Debug& debug, const CompressedPixelFormat value) {
         /* LCOV_EXCL_START */
         #define _c(value) case CompressedPixelFormat::value: return debug << "CompressedPixelFormat::" #value;
         _c(Bc1RGBUnorm)
+        _c(Bc1RGBSrgb)
         _c(Bc1RGBAUnorm)
+        _c(Bc1RGBASrgb)
         _c(Bc2RGBAUnorm)
+        _c(Bc2RGBASrgb)
         _c(Bc3RGBAUnorm)
+        _c(Bc3RGBASrgb)
         _c(EacR11Unorm)
         _c(EacR11Snorm)
         _c(EacRG11Unorm)

src/Magnum/PixelFormat.h

@@ -580,6 +580,16 @@ enum class CompressedPixelFormat: UnsignedInt {
      */
     Bc1RGBUnorm,
 
+    /**
+     * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC1
+     * compressed sRGB, normalized unsigned byte (DXT1).
+     *
+     * Corresponds to @ref GL::CompressedPixelFormat::SRGBS3tcDxt1,
+     * @ref GL::TextureFormat::CompressedSRGBS3tcDxt1 /
+     * @def_vk_keyword{FORMAT_BC1_RGB_SRGB_BLOCK,Format}.
+     */
+    Bc1RGBSrgb,
+
     /**
      * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC1
      * compressed RGBA, normalized unsigned byte (DXT1).
@@ -590,6 +600,16 @@ enum class CompressedPixelFormat: UnsignedInt {
      */
     Bc1RGBAUnorm,
 
+    /**
+     * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC1
+     * compressed sRGB + linear alpha, normalized unsigned byte (DXT1).
+     *
+     * Corresponds to @ref GL::CompressedPixelFormat::SRGBAlphaS3tcDxt1,
+     * @ref GL::TextureFormat::CompressedSRGBAlphaS3tcDxt1 /
+     * @def_vk_keyword{FORMAT_BC1_RGBA_SRGB_BLOCK,Format}.
+     */
+    Bc1RGBASrgb,
+
     /**
      * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC2
      * compressed RGBA, normalized unsigned byte (DXT3).
@@ -600,6 +620,16 @@ enum class CompressedPixelFormat: UnsignedInt {
      */
     Bc2RGBAUnorm,
 
+    /**
+     * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC2
+     * compressed sRGB + linear alpha, normalized unsigned byte (DXT3).
+     *
+     * Corresponds to @ref GL::CompressedPixelFormat::SRGBAlphaS3tcDxt3,
+     * @ref GL::TextureFormat::CompressedSRGBAlphaS3tcDxt3 /
+     * @def_vk_keyword{FORMAT_BC2_SRGB_BLOCK,Format}.
+     */
+    Bc2RGBASrgb,
+
     /**
      * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC3
      * compressed RGBA, normalized unsigned byte (DXT5).
@@ -610,6 +640,16 @@ enum class CompressedPixelFormat: UnsignedInt {
      */
     Bc3RGBAUnorm,
 
+    /**
+     * [S3TC](https://en.wikipedia.org/wiki/S3_Texture_Compression) BC3
+     * compressed sRGB + linear alpha, normalized unsigned byte (DXT5).
+     *
+     * Corresponds to @ref GL::CompressedPixelFormat::SRGBAlphaS3tcDxt5,
+     * @ref GL::TextureFormat::CompressedSRGBAlphaS3tcDxt5 /
+     * @def_vk_keyword{FORMAT_BC3_SRGB_BLOCK,Format}.
+     */
+    Bc3RGBASrgb,
+
     /**
      * [EAC](https://en.wikipedia.org/wiki/Ericsson_Texture_Compression#ETC2_and_EAC)
      * compressed red component, normalized unsigned 11-bit.

src/Magnum/Vk/Implementation/compressedFormatMapping.hpp

@@ -26,9 +26,13 @@
 /* See Magnum/Vk/Enums.cpp and Magnum/Vk/Test/EnumsTest.cpp */
 #ifdef _c
 _c(Bc1RGBUnorm, BC1_RGB_UNORM_BLOCK)
+_c(Bc1RGBSrgb, BC1_RGB_SRGB_BLOCK)
 _c(Bc1RGBAUnorm, BC1_RGBA_UNORM_BLOCK)
+_c(Bc1RGBASrgb, BC1_RGBA_SRGB_BLOCK)
 _c(Bc2RGBAUnorm, BC2_UNORM_BLOCK)
+_c(Bc2RGBASrgb, BC2_SRGB_BLOCK)
 _c(Bc3RGBAUnorm, BC3_UNORM_BLOCK)
+_c(Bc3RGBASrgb, BC3_SRGB_BLOCK)
 _c(EacR11Unorm, EAC_R11_UNORM_BLOCK)
 _c(EacR11Snorm, EAC_R11_SNORM_BLOCK)
 _c(EacRG11Unorm, EAC_R11G11_UNORM_BLOCK)