public static int stbi_write_hdr_core(StbiWriteContext s, int x, int y, int comp, float *data)
{
if ((y <= 0) || (x <= 0) || (data == null))
{
return(0);
}
var scratch = (byte *)(CRuntime.Malloc((ulong)(x * 4)));
int i;
var header = "#?RADIANCE\n# Written by stb_image_write.h\nFORMAT=32-bit_rle_rgbe\n";
var bytes = Encoding.UTF8.GetBytes(header);
fixed(byte *ptr = bytes)
{
s.Func(s.Context, ((sbyte *)ptr), bytes.Length);
}
var str = string.Format("EXPOSURE= 1.0000000000000\n\n-Y {0} +X {1}\n", y, x);
bytes = Encoding.UTF8.GetBytes(str);
fixed(byte *ptr = bytes)
{
s.Func(s.Context, ((sbyte *)ptr), bytes.Length);
}
for (i = 0; i < y; i++)
{
stbiw__write_hdr_scanline(s, x, comp, scratch, data + comp * i * x);
}
CRuntime.Free(scratch);
return(1);
}
public static int stbiw__outfile(StbiWriteContext s, int rgbDir, int vdir, int x, int y, int comp,
int expandMono, void *data, int alpha, int pad, string fmt, params object[] v)
{
if ((y < 0) || (x < 0))
{
return(0);
}
stbiw__writefv(s, fmt, v);
stbiw__write_pixels(s, rgbDir, vdir, x, y, comp, data, alpha, pad, expandMono);
return(1);
}
public static int stbi_write_tga_to_func(WriteCallback func,
void *context,
int x,
int y,
int comp,
void *data
)
{
var s = new StbiWriteContext();
stbi__start_write_callbacks(s, func, context);
return(stbi_write_tga_core(s, x, y, comp, data));
}
public static int stbi_write_jpg_to_func(WriteCallback func,
void *context,
int x,
int y,
int comp,
void *data,
int quality
)
{
StbiWriteContext s = new StbiWriteContext();
stbi__start_write_callbacks(s, func, context);
return(stbi_write_jpg_core(s, x, y, comp, data, quality));
}
public static void stbiw__writefv(StbiWriteContext s, string fmt, params object[] v)
{
var vindex = 0;
for (var i = 0; i < fmt.Length; ++i)
{
var c = fmt[i];
switch (c)
{
case ' ':
break;
case '1':
{
var x = (byte)((int)v[vindex++] & 0xff);
s.Func(s.Context, &x, 1);
break;
}
case '2':
{
var x = (int)v[vindex++];
var b = stackalloc byte[2];
b[0] = (byte)(x & 0xff);
b[1] = (byte)((x >> 8) & 0xff);
s.Func(s.Context, b, 2);
break;
}
case '4':
{
var x = (int)v[vindex++];
var b = stackalloc byte[4];
b[0] = (byte)(x & 0xff);
b[1] = (byte)((x >> 8) & 0xff);
b[2] = (byte)((x >> 16) & 0xff);
b[3] = (byte)((x >> 24) & 0xff);
s.Func(s.Context, b, 4);
break;
}
}
}
}
public static void stbiw__writef(StbiWriteContext s, string fmt, params object[] v)
{
stbiw__writefv(s, fmt, v);
}
public static void stbi__start_write_callbacks(StbiWriteContext s, WriteCallback c, void *context)
{
s.Func = c;
s.Context = context;
}
