Add support for IEEEFP RGB/RGBA/CMYK(32) decoding

Pipfile

@@ -0,0 +1,11 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+
+[requires]
+python_version = "3.7"

README.md

@@ -19,10 +19,10 @@ This table lists photometric interpretations and sample formats which are suppor
 |-|-|-|
 | `WhiteIsZero` | Gray(8\|16\|32\|64) | Gray(32) |
 | `BlackIsZero` | Gray(8\|16\|32\|64) | Gray(32) |
-| `RGB` | RGB(8\|16\|32\|64), RGBA(8\|16\|32\|64) | |
+| `RGB` | RGB(8\|16\|32\|64), RGBA(8\|16\|32\|64) | RGB(32), RGBA(32) |
 | `RGBPalette` | | |
 | `Mask` | | |
-| `CMYK` | CMYK(8\|16\|32\|64) | |
+| `CMYK` | CMYK(8\|16\|32\|64) | CMYK(32) |
 | `YCbCr` | | |
 | `CIELab` | | |
 

src/decoder/mod.rs

@@ -672,6 +672,12 @@ impl<R: Read + Seek> Decoder<R> {
                 reader.read_u32_into(&mut buffer[..bytes / 4])?;
                 bytes / 4
             }
+            (ColorType::RGBA(32), DecodingBuffer::F32(ref mut buffer))
+            | (ColorType::RGB(32), DecodingBuffer::F32(ref mut buffer))
+            | (ColorType::CMYK(32), DecodingBuffer::F32(ref mut buffer)) => {
+                reader.read_f32_into(&mut buffer[..bytes / 4])?;
+                bytes / 4
+            }
             (ColorType::RGBA(64), DecodingBuffer::U64(ref mut buffer))
             | (ColorType::RGB(64), DecodingBuffer::U64(ref mut buffer))
             | (ColorType::CMYK(64), DecodingBuffer::U64(ref mut buffer)) => {

tests/decode_images.rs

@@ -58,6 +58,11 @@ fn test_cmyk_u16() {
     test_image_sum_u16("cmyk-3c-16b.tiff", ColorType::CMYK(16), 2181426827);
 }
 
+#[test]
+fn test_cmyk_f32() {
+    test_image_sum_f32("cmyk-3c-32b-float.tiff", ColorType::CMYK(32), 496.0405);
+}
+
 #[test]
 fn test_gray_u8() {
     test_image_sum_u8("minisblack-1c-8b.tiff", ColorType::Gray(8), 2840893);
@@ -113,6 +118,11 @@ fn test_rgb_u64() {
     test_image_sum_u64("gradient-3c-64b.tiff", ColorType::RGB(64), 2030834111716);
 }
 
+#[test]
+fn test_rgb_f32() {
+    test_image_sum_f32("gradient-3c-32b-float.tiff", ColorType::RGB(32), 472.8405);
+}
+
 #[test]
 fn test_string_tags() {
     // these files have null-terminated strings for their Software tag. One has extra bytes after