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Replace core:image's sidecar with explicit metadata_ptr and metadata_type.

Browse Source 
To unpack, use:
```odin

v: ^png.Info;

if img.metadata_ptr != nil && img.metadata_type == png.Info {
	v = (^png.Info)(img.metadata_ptr);
	...
}
```
This commit is contained in:
Jeroen van Rijn
2021-06-21 16:32:42 +02:00
parent 18471f358e
commit e036a321a0
3 changed files with 23 additions and 23 deletions
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core/image/png/png.odin
+3 -6
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@@ -392,10 +392,7 @@ load_from_stream :: proc(stream: io.Stream, options := Options{}, allocator := c
img = new(Image);
}
info: ^Info;
if img.sidecar == nil {
info = new(Info);
}
info := new(Info, context.allocator);
ctx := &compress.Context{
input = stream,
@@ -417,7 +414,6 @@ load_from_stream :: proc(stream: io.Stream, options := Options{}, allocator := c
header: IHDR;
img.sidecar = info;
info.chunks.allocator = context.temp_allocator;
// State to ensure correct chunk ordering.
@@ -659,7 +655,8 @@ load_from_stream :: proc(stream: io.Stream, options := Options{}, allocator := c
}
if .return_header in options || .return_metadata in options {
img.sidecar = info;
img.metadata_ptr = info;
img.metadata_type = typeid_of(Info);
}
if .do_not_decompress_image in options {
img.channels = final_image_channels;