public static void *stbi__gif_load(StbiContext s, int *x, int *y, int *comp, int reqComp,
StbiResultInfo *ri)
{
byte *u = null;
var g = new StbiGif();
u = stbi__gif_load_next(s, g, comp, reqComp, null);
if (u != null)
{
*x = g.W;
*y = g.H;
if (reqComp != 0 && reqComp != 4)
{
u = stbi__convert_format(u, 4, reqComp, (uint)g.W, (uint)g.H);
}
}
else if (g.Out != null)
{
CRuntime.Free(g.Out);
}
CRuntime.Free(g.History);
CRuntime.Free(g.Background);
return(u);
}
public static IMemoryHolder Load(BinReader s, ReadState ri)
{
var info = new PsdInfo();
if (!ParseHeader(s, ri, ref info))
{
return(null);
}
if (AreValidMad3Sizes(4, ri.Width, ri.Height, 0) == 0)
{
s.Error(ErrorCode.TooLarge);
return(null);
}
byte *_out_ = (byte *)MAllocMad3((4 * ri.OutDepth + 7) / 8, ri.Width, ri.Height, 0);
if (_out_ == null)
{
s.Error(ErrorCode.OutOfMemory);
return(null);
}
int pixelCount = ri.Width * ri.Height;
if (info.compression != 0)
{
s.Skip(ri.Height * info.channelCount * 2);
for (int channel = 0; channel < 4; channel++)
{
byte *dst;
dst = _out_ + channel;
if (channel >= info.channelCount)
{
for (int i = 0; i < pixelCount; i++, dst += 4)
{
*dst = (byte)(channel == 3 ? 255 : 0);
}
}
else
{
if (!DecodeRLE(s, dst, pixelCount))
{
CRuntime.Free(_out_);
throw new StbImageReadException(ErrorCode.Corrupt);
}
}
}
}
else
{
for (int channel = 0; channel < 4; channel++)
{
if (channel >= info.channelCount)
{
if (ri.Depth == 16)
{
ushort *q = ((ushort *)_out_) + channel;
ushort val = (ushort)(channel == 3 ? 65535 : 0);
for (int i = 0; i < pixelCount; i++, q += 4)
{
*q = val;
}
}
else
{
byte *p = _out_ + channel;
byte val = (byte)(channel == 3 ? 255 : 0);
for (int i = 0; i < pixelCount; i++, p += 4)
{
*p = val;
}
}
}
else
{
if (ri.OutDepth == 16)
{
ushort *q = ((ushort *)_out_) + channel;
for (int i = 0; i < pixelCount; i++, q += 4)
{
*q = (ushort)s.ReadInt16BE();
}
}
else
{
byte *p = _out_ + channel;
if (ri.OutDepth == 16)
{
for (int i = 0; i < pixelCount; i++, p += 4)
{
*p = (byte)(s.ReadInt16BE() >> 8);
}
}
else
{
for (int i = 0; i < pixelCount; i++, p += 4)
{
*p = s.ReadByte();
}
}
}
}
}
}
if (info.channelCount >= 4)
{
if (ri.OutDepth == 16)
{
for (int i = 0; i < pixelCount; ++i)
{
ushort *pixel = (ushort *)_out_ + 4 * i;
if ((pixel[3] != 0) && (pixel[3] != 65535))
{
float a = pixel[3] / 65535.0f;
float ra = 1f / a;
float inv_a = 65535.0f * (1 - ra);
pixel[0] = (ushort)(pixel[0] * ra + inv_a);
pixel[1] = (ushort)(pixel[1] * ra + inv_a);
pixel[2] = (ushort)(pixel[2] * ra + inv_a);
}
}
}
else
{
for (int i = 0; i < pixelCount; ++i)
{
byte *pixel = _out_ + 4 * i;
if ((pixel[3] != 0) && (pixel[3] != 255))
{
float a = pixel[3] / 255f;
float ra = 1f / a;
float inv_a = 255f * (1 - ra);
pixel[0] = (byte)(pixel[0] * ra + inv_a);
pixel[1] = (byte)(pixel[1] * ra + inv_a);
pixel[2] = (byte)(pixel[2] * ra + inv_a);
}
}
}
}
IMemoryHolder result = new HGlobalMemoryHolder(
_out_, (ri.Width * ri.Height * ri.OutComponents * ri.OutDepth + 7) / 8);
var errorCode = ConvertFormat(result, ri, out var convertedResult);
if (errorCode != ErrorCode.Ok)
{
return(null);
}
return(convertedResult);
}
public static void *stbi__tga_load(StbiContext s, int *x, int *y, int *comp, int reqComp,
StbiResultInfo *ri)
{
var tga_offset = (int)stbi__get8(s);
var tga_indexed = (int)stbi__get8(s);
var tga_image_type = (int)stbi__get8(s);
var tga_is_rle = 0;
var tga_palette_start = stbi__get16le(s);
var tga_palette_len = stbi__get16le(s);
var tga_palette_bits = (int)stbi__get8(s);
var tga_x_origin = stbi__get16le(s);
var tga_y_origin = stbi__get16le(s);
var tga_width = stbi__get16le(s);
var tga_height = stbi__get16le(s);
var tga_bits_per_pixel = (int)stbi__get8(s);
var tga_comp = 0;
var tga_rgb16 = 0;
var tga_inverted = (int)stbi__get8(s);
byte *tga_data;
byte *tga_palette = null;
var i = 0;
var j = 0;
var raw_data = stackalloc byte[4];
raw_data[0] = 0;
var rle_count = 0;
var rle_repeating = 0;
var read_next_pixel = 1;
if (tga_image_type >= 8)
{
tga_image_type -= 8;
tga_is_rle = 1;
}
tga_inverted = 1 - ((tga_inverted >> 5) & 1);
if (tga_indexed != 0)
{
tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
}
else
{
tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, tga_image_type == 3 ? 1 : 0, &tga_rgb16);
}
if (tga_comp == 0)
{
return((byte *)(ulong)(stbi__err("bad format") != 0 ? (byte *)null : null));
}
*x = tga_width;
*y = tga_height;
if (comp != null)
{
*comp = tga_comp;
}
if (stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0) == 0)
{
return((byte *)(ulong)(stbi__err("too large") != 0 ? (byte *)null : null));
}
tga_data = (byte *)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
if (tga_data == null)
{
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
stbi__skip(s, tga_offset);
if (tga_indexed == 0 && tga_is_rle == 0 && tga_rgb16 == 0)
{
for (i = 0; i < tga_height; ++i)
{
var row = tga_inverted != 0 ? tga_height - i - 1 : i;
var tga_row = tga_data + row * tga_width * tga_comp;
stbi__getn(s, tga_row, tga_width * tga_comp);
}
}
else
{
if (tga_indexed != 0)
{
stbi__skip(s, tga_palette_start);
tga_palette = (byte *)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
if (tga_palette == null)
{
CRuntime.Free(tga_data);
return((byte *)(ulong)(stbi__err("outofmem") != 0 ? (byte *)null : null));
}
if (tga_rgb16 != 0)
{
var pal_entry = tga_palette;
for (i = 0; i < tga_palette_len; ++i)
{
stbi__tga_read_rgb16(s, pal_entry);
pal_entry += tga_comp;
}
}
else if (stbi__getn(s, tga_palette, tga_palette_len * tga_comp) == 0)
{
CRuntime.Free(tga_data);
CRuntime.Free(tga_palette);
return((byte *)(ulong)(stbi__err("bad palette") != 0 ? (byte *)null : null));
}
}
for (i = 0; i < tga_width * tga_height; ++i)
{
if (tga_is_rle != 0)
{
if (rle_count == 0)
{
var rle_cmd = (int)stbi__get8(s);
rle_count = 1 + (rle_cmd & 127);
rle_repeating = rle_cmd >> 7;
read_next_pixel = 1;
}
else if (rle_repeating == 0)
{
read_next_pixel = 1;
}
}
else
{
read_next_pixel = 1;
}
if (read_next_pixel != 0)
{
if (tga_indexed != 0)
{
var pal_idx = tga_bits_per_pixel == 8 ? stbi__get8(s) : stbi__get16le(s);
if (pal_idx >= tga_palette_len)
{
pal_idx = 0;
}
pal_idx *= tga_comp;
for (j = 0; j < tga_comp; ++j)
{
raw_data[j] = tga_palette[pal_idx + j];
}
}
else if (tga_rgb16 != 0)
{
stbi__tga_read_rgb16(s, raw_data);
}
else
{
for (j = 0; j < tga_comp; ++j)
{
raw_data[j] = stbi__get8(s);
}
}
read_next_pixel = 0;
}
for (j = 0; j < tga_comp; ++j)
{
tga_data[i * tga_comp + j] = raw_data[j];
}
--rle_count;
}
if (tga_inverted != 0)
{
for (j = 0; j * 2 < tga_height; ++j)
{
var index1 = j * tga_width * tga_comp;
var index2 = (tga_height - 1 - j) * tga_width * tga_comp;
for (i = tga_width * tga_comp; i > 0; --i)
{
var temp = tga_data[index1];
tga_data[index1] = tga_data[index2];
tga_data[index2] = temp;
++index1;
++index2;
}
}
}
if (tga_palette != null)
{
CRuntime.Free(tga_palette);
}
}
if (tga_comp >= 3 && tga_rgb16 == 0)
{
var tga_pixel = tga_data;
for (i = 0; i < tga_width * tga_height; ++i)
{
var temp = tga_pixel[0];
tga_pixel[0] = tga_pixel[2];
tga_pixel[2] = temp;
tga_pixel += tga_comp;
}
}
if (reqComp != 0 && reqComp != tga_comp)
{
tga_data = stbi__convert_format(tga_data, tga_comp, reqComp, (uint)tga_width, (uint)tga_height);
}
tga_palette_start = tga_palette_len = tga_palette_bits = tga_x_origin = tga_y_origin = 0;
return(tga_data);
}
public static void *stbi__load_gif_main(StbiContext s, int **delays, int *x, int *y, int *z, int *comp,
int reqComp)
{
if (stbi__gif_test(s) != 0)
{
var layers = 0;
byte *u = null;
byte *out_ = null;
byte *two_back = null;
var g = new StbiGif();
var stride = 0;
if (delays != null)
{
*delays = null;
}
do
{
u = stbi__gif_load_next(s, g, comp, reqComp, two_back);
if (u != null)
{
*x = g.W;
*y = g.H;
++layers;
stride = g.W * g.H * 4;
if (out_ != null)
{
out_ = (byte *)CRuntime.Realloc(out_, (ulong)(layers * stride));
if (delays != null)
{
*delays = (int *)CRuntime.Realloc(*delays, (ulong)(sizeof(int) * layers));
}
}
else
{
out_ = (byte *)stbi__malloc((ulong)(layers * stride));
if (delays != null)
{
*delays = (int *)stbi__malloc((ulong)(layers * sizeof(int)));
}
}
CRuntime.Memcpy(out_ + (layers - 1) * stride, u, (ulong)stride);
if (layers >= 2)
{
two_back = out_ - 2 * stride;
}
if (delays != null)
{
(*delays)[layers - 1U] = g.Delay;
}
}
} while (u != null);
CRuntime.Free(g.Out);
CRuntime.Free(g.History);
CRuntime.Free(g.Background);
if (reqComp != 0 && reqComp != 4)
{
out_ = stbi__convert_format(out_, 4, reqComp, (uint)(layers * g.W), (uint)g.H);
}
*z = layers;
return(out_);
}
return((byte *)(ulong)(stbi__err("not GIF") != 0 ? (byte *)null : null));
}
