public static unsafe extern int stbir_resize(
void *input_pixels, int input_w, int input_h, int input_stride_in_bytes,
void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context
);
public static int stbir_resize(void *input_pixels, int input_w, int input_h, int input_stride_in_bytes,
void *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
stbir_datatype datatype, int num_channels, int alpha_channel, stbir__resize_flag flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical, stbir_colorspace space)
{
return(stbir_resize(input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
(int)datatype, num_channels, alpha_channel, (int)flags,
(int)edge_mode_horizontal, (int)edge_mode_vertical, (int)filter_horizontal, (int)filter_vertical, (int)space));
}
public static unsafe MipGeneratorFn Get(
MipFormat format,
stbir_filter filter_horizontal = stbir_filter.DEFAULT,
stbir_filter filter_vertical = stbir_filter.DEFAULT,
stbir_edge edge_horizontal = stbir_edge.CLAMP,
stbir_edge edge_vertical = stbir_edge.CLAMP
)
{
var masked = (format & ~MipFormat.sRGB);
var datatype = (masked == MipFormat.Vector4) ||
(masked == MipFormat.pVector4) ||
(masked == MipFormat.Single)
? stbir_datatype.FLOAT
: stbir_datatype.UINT8;
var colorspace = (format & MipFormat.sRGB) == MipFormat.sRGB
? stbir_colorspace.SRGB
: stbir_colorspace.LINEAR;
var channels = masked == MipFormat.Gray1 ? 1 : 4;
var flags = (masked == MipFormat.pRGBA) ||
(masked == MipFormat.pGray4) ||
(masked == MipFormat.pVector4)
? stbir_flags.ALPHA_PREMULTIPLIED
: default;
var alpha_channel = (masked == MipFormat.Gray1) ? -1 : 3;
unsafe void Implementation(
void *src, int srcWidth, int srcHeight, int srcStrideBytes,
void *dest, int destWidth, int destHeight, int destStrideBytes
)
{
var result = API.stbir_resize(
src, srcWidth, srcHeight, srcStrideBytes,
dest, destWidth, destHeight, destStrideBytes,
datatype, channels, alpha_channel, (int)flags,
edge_horizontal, edge_vertical,
filter_horizontal, filter_vertical,
colorspace, null
);
if (result != 1)
{
throw new Exception("An error occurred in stb_image_resize");
}
}
return(Implementation);
}
}
public static int stbir_resize_uint16_generic(ushort[] input_pixels, int input_w, int input_h, int input_stride_in_bytes,
ushort[] output_pixels, int output_w, int output_h, int output_stride_in_bytes,
int num_channels, int alpha_channel, stbir__resize_flag flags, stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space)
{
fixed(ushort *inputPtr = input_pixels)
fixed(ushort *outputPtr = output_pixels)
{
return(stbir_resize_uint16_generic(inputPtr, input_w, input_h, input_stride_in_bytes,
outputPtr, output_w, output_h, output_stride_in_bytes,
num_channels, alpha_channel, (int)flags, (int)edge_wrap_mode, (int)filter, (int)space));
}
}
public static int stbir_resize_uint8_srgb_edgemode(byte[] input_pixels, int input_w, int input_h,
int input_stride_in_bytes, byte[] output_pixels, int output_w, int output_h, int output_stride_in_bytes,
int num_channels, int alpha_channel, stbir__resize_flag flags, stbir_edge edge_wrap_mode)
{
fixed(byte *inputPtr = input_pixels)
fixed(byte *outputPtr = output_pixels)
{
return(stbir_resize_uint8_srgb_edgemode(inputPtr, input_w, input_h, input_stride_in_bytes,
outputPtr, output_w, output_h, output_stride_in_bytes,
num_channels, alpha_channel, (int)flags, (int)edge_wrap_mode));
}
}
