It does nothing now but I want to support edge behavior in the future.

stb_resample.h

@@ -18,7 +18,7 @@ Initial implementation by Jorge L Rodriguez
 #define STBR_INCLUDE_STB_RESAMPLE_H
 
 // Basic usage:
-//    result = stbr_resize(input_data, input_w, input_h, input_components, STBR_FILTER_NEAREST, output_data, output_w, output_h);
+//    result = stbr_resize(input_data, input_w, input_h, input_components, output_data, output_w, output_h, STBR_FILTER_NEAREST, STBR_EDGE_CLAMP);
 //
 //    input_data is your supplied texels.
 //    output_data will be the resized texels. It should be of size output_w * output_h * input_components.
@@ -29,6 +29,11 @@ typedef enum
 	STBR_FILTER_NEAREST = 1,
 } stbr_filter;
 
+typedef enum
+{
+	STBR_EDGE_CLAMP = 1,
+} stbr_edge;
+
 
 typedef unsigned char stbr_uc;
 
@@ -47,7 +52,7 @@ extern "C" {
 	// PRIMARY API - resize an image
 	//
 
-	STBRDEF int stbr_resize(const stbr_uc* input_data, int input_w, int input_h, int input_components, stbr_filter filter, stbr_uc* output_data, int output_w, int output_h);
+	STBRDEF int stbr_resize(const stbr_uc* input_data, int input_w, int input_h, int input_components, stbr_uc* output_data, int output_w, int output_h, stbr_filter filter, stbr_edge edge);
 
 
 #ifdef __cplusplus
@@ -154,7 +159,7 @@ static void stbr__filter_nearest_n(const stbr_uc* input_data, stbr_uc* output_da
 
 typedef void (stbr__filter_fn)(const stbr_uc* input_data, stbr_uc* output_data, size_t input_texel_index, size_t output_texel_index, size_t n);
 
-STBRDEF int stbr_resize(const stbr_uc* input_data, int input_w, int input_h, int input_components, stbr_filter filter, stbr_uc* output_data, int output_w, int output_h)
+STBRDEF int stbr_resize(const stbr_uc* input_data, int input_w, int input_h, int input_components, stbr_uc* output_data, int output_w, int output_h, stbr_filter filter, stbr_edge edge)
 {
 	int x, y;
 	int width_stride_input = input_components * input_w;

tests/resample_test.c

@@ -39,7 +39,7 @@ int main(int argc, char** argv)
 
 	output_data = malloc(out_w * out_h * n);
 
-	stbr_resize(input_data, w, h, n, STBR_FILTER_NEAREST, output_data, out_w, out_h);
+	stbr_resize(input_data, w, h, n, output_data, out_w, out_h, STBR_FILTER_NEAREST, STBR_EDGE_CLAMP);
 
 	stbi_write_png("output.png", out_w, out_h, n, output_data, out_w * n);