Minor color/texture format fixes.

Just fooling around. Also, I hate random four-letter abbreviations.

src/Magnum/AbstractTexture.cpp

@@ -391,7 +391,7 @@ ColorFormat AbstractTexture::imageFormatForInternalFormat(const TextureFormat in
         #endif
         #ifndef MAGNUM_TARGET_GLES
         case TextureFormat::CompressedRed:
-        case TextureFormat::CompressedRedRtgc1:
+        case TextureFormat::CompressedRedRgtc1:
         case TextureFormat::CompressedSignedRedRgtc1:
         #endif
             return ColorFormat::Red;
@@ -594,7 +594,7 @@ ColorType AbstractTexture::imageTypeForInternalFormat(const TextureFormat intern
         case TextureFormat::CompressedRG:
         case TextureFormat::CompressedRGB:
         case TextureFormat::CompressedRGBA:
-        case TextureFormat::CompressedRedRtgc1:
+        case TextureFormat::CompressedRedRgtc1:
         case TextureFormat::CompressedRGRgtc2:
         case TextureFormat::CompressedRGBABptcUnorm:
         case TextureFormat::CompressedSRGBAlphaBptcUnorm:

src/Magnum/ColorFormat.h

@@ -372,8 +372,8 @@ enum class ColorType: GLenum {
     #ifndef MAGNUM_TARGET_GLES
     /**
      * BGR, unsigned short, red and blue 5bit, green 6bit.
-     * @requires_gl Only @ref Magnum::ColorType::RGB565 "ColorType::RGB565" is
-     *      available in OpenGL ES.
+     * @requires_gl Only @ref Magnum::ColorType::UnsignedShort565 "ColorType::UnsignedShort565"
+     *      is available in OpenGL ES.
      */
     UnsignedShort565Rev = GL_UNSIGNED_SHORT_5_6_5_REV,
     #endif

src/Magnum/TextureFormat.h

@@ -704,15 +704,15 @@ enum class TextureFormat: GLenum {
     CompressedRGBA = GL_COMPRESSED_RGBA,
 
     /**
-     * RTGC compressed red channel, normalized unsigned. **Not available on
+     * RGTC compressed red channel, normalized unsigned. **Not available on
      * multisample textures.**
      * @requires_gl30 %Extension @extension{EXT,texture_compression_rgtc}
      * @requires_gl RGTC texture compression is not available in OpenGL ES.
      */
-    CompressedRedRtgc1 = GL_COMPRESSED_RED_RGTC1,
+    CompressedRedRgtc1 = GL_COMPRESSED_RED_RGTC1,
 
     /**
-     * RTGC compressed red and green channel, normalized unsigned. **Not
+     * RGTC compressed red and green channel, normalized unsigned. **Not
      * available on multisample textures.**
      * @requires_gl30 %Extension @extension{EXT,texture_compression_rgtc}
      * @requires_gl RGTC texture compression is not available in OpenGL ES.
@@ -720,7 +720,7 @@ enum class TextureFormat: GLenum {
     CompressedRGRgtc2 = GL_COMPRESSED_RG_RGTC2,
 
     /**
-     * RTGC compressed red channel, normalized signed. **Not available on
+     * RGTC compressed red channel, normalized signed. **Not available on
      * multisample textures.**
      * @requires_gl30 %Extension @extension{EXT,texture_compression_rgtc}
      * @requires_gl RGTC texture compression is not available in OpenGL ES.
@@ -728,7 +728,7 @@ enum class TextureFormat: GLenum {
     CompressedSignedRedRgtc1 = GL_COMPRESSED_SIGNED_RED_RGTC1,
 
     /**
-     * RTGC compressed red and green channel, normalized signed. **Not
+     * RGTC compressed red and green channel, normalized signed. **Not
      * available on multisample textures.**
      * @requires_gl30 %Extension @extension{EXT,texture_compression_rgtc}
      * @requires_gl RGTC texture compression is not available in OpenGL ES.