Fix exporting R8 files as PNG using libpng

brunoanc · brunoanc · commit 9cf30e28947d · 2024-09-01T17:58:27.000-06:00
Fixes an incorrect stride value for R8 images being exported to PNG on
the experimental libpng SaveToPNGFile implementation.
diff --git a/Auxiliary/DirectXTexPNG.cpp b/Auxiliary/DirectXTexPNG.cpp
@@ -266,6 +266,7 @@ namespace
             {
             case DXGI_FORMAT_R8_UNORM:
                 color_type = PNG_COLOR_TYPE_GRAY;
+                channel = 1;
                 break;
             case DXGI_FORMAT_B8G8R8A8_UNORM:
             case DXGI_FORMAT_B8G8R8X8_UNORM:

Original file line number	Diff line number	Diff line change
`@@ -266,6 +266,7 @@ namespace`
`266`	`266`	`{`
`267`	`267`	`case DXGI_FORMAT_R8_UNORM:`
`268`	`268`	`color_type = PNG_COLOR_TYPE_GRAY;`
	`269`	`+ channel = 1;`
`269`	`270`	`break;`
`270`	`271`	`case DXGI_FORMAT_B8G8R8A8_UNORM:`
`271`	`272`	`case DXGI_FORMAT_B8G8R8X8_UNORM:`