refactor(png): Relocate ff_png_bpp to png.c from png.h

1 files changed, 1 insertions, 18 deletions

diff --git a/include/tinyff/image/png.h b/include/tinyff/image/png.h
index 3937e8d..fd8d29d 100644
--- a/include/tinyff/image/png.h
+++ b/include/tinyff/image/png.h
@@ -60,24 +60,7 @@ typedef struct {
 
 // Small BpP helper function
 
-static inline uint16_t ff_png_bpp(ff_png_ctx *ctx)
-{
-    int16_t byte_depth = ctx->bit_depth / 8;
-    switch (ctx->color_type) {
-        case 0: // Grayscale
-            return byte_depth * 1; // Gray
-        case 2: // Truecolor
-            return byte_depth * 3; // R, G, B
-        case 3: // Indexed-color
-            return byte_depth * 1; // Index
-        case 4: // Grayscale with alpha
-            return byte_depth * 2; // Gray w/ alpha
-        case 6: // Truecolor with alpha
-            return byte_depth * 4; // R, G, B w/ alpha
-        default:
-            return 0; // damn, you corrupt
-    }
-}
+static inline uint16_t ff_png_bpp(ff_png_ctx *ctx);
 
 
 // Chunk handling