/// <summary>
/// Function to expand a 16BPP scan line in an image to a 32BPP RGBA line.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="srcFormat">Format to convert from.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="ArgumentException">Thrown when the <paramref name="srcFormat" /> is not a 16 BPP format.</exception>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>
/// <para>
/// Use this to expand a 16 BPP (B5G6R5 or B5G5R5A1 format) into a 32 BPP R8G8B8A8 (normalized unsigned integer) format.
/// </para>
/// </remarks>
public static unsafe void Expand16BPPScanline(void *src, int srcPitch, BufferFormat srcFormat, void *dest, int destPitch, ImageBitFlags bitFlags)
{
ushort *srcPtr = (ushort *)src;
uint * destPtr = (uint *)dest;
if ((srcFormat != BufferFormat.B5G5R5A1_UNorm) && (srcFormat != BufferFormat.B5G6R5_UNorm) && (srcFormat != BufferFormat.B4G4R4A4_UNorm))
{
throw new ArgumentException(string.Format(Resources.GORIMG_ERR_FORMAT_IS_NOT_16BPP, srcFormat), nameof(srcFormat));
}
if (src == null)
{
throw new ArgumentNullException(nameof(src));
}
if (dest == null)
{
throw new ArgumentNullException(nameof(dest));
}
for (int srcCount = 0, destCount = 0; ((srcCount < srcPitch) && (destCount < destPitch)); srcCount += 2, destCount += 4)
{
ushort srcPixel = *(srcPtr++);
uint R = 0, G = 0, B = 0, A = 0;
switch (srcFormat)
{
case BufferFormat.B5G6R5_UNorm:
R = (uint)((srcPixel & 0xF800) >> 11);
G = (uint)((srcPixel & 0x07E0) >> 5);
B = (uint)(srcPixel & 0x001F);
R = ((R << 3) | (R >> 2));
G = ((G << 2) | (G >> 4)) << 8;
B = ((B << 3) | (B >> 2)) << 16;
A = 0xFF000000;
break;
case BufferFormat.B5G5R5A1_UNorm:
R = (uint)((srcPixel & 0x7C00) >> 10);
G = (uint)((srcPixel & 0x03E0) >> 5);
B = (uint)(srcPixel & 0x001F);
R = ((R << 3) | (R >> 2));
G = ((G << 3) | (G >> 2)) << 8;
B = ((B << 3) | (B >> 2)) << 16;
A = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha)
? 0xFF000000
: (((srcPixel & 0x8000) != 0) ? 0xFF000000 : 0);
break;
case BufferFormat.B4G4R4A4_UNorm:
A = (uint)((srcPixel & 0xF000) >> 12);
R = (uint)((srcPixel & 0xF00) >> 8);
G = (uint)((srcPixel & 0xF0) >> 4);
B = (uint)(srcPixel & 0xF);
R = ((R << 4) | R);
G = ((G << 4) | G) << 8;
B = ((B << 4) | B) << 16;
A = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha)
? 0xFF000000
: ((A << 4) | A) << 24;
break;
}
*(destPtr++) = R | G | B | A;
}
}
/// <summary>
/// Function to copy (or update in-place) with bits swizzled to match another format.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="format">Format of the destination buffer.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="ArgumentException">Thrown when the <paramref name="format"/> parameter is Unknown.</exception>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>
/// <para>
/// Use this method to copy a single scanline and swizzle the bits of an image and (optionally) set an opaque constant alpha value.
/// </para>
/// </remarks>
public static unsafe void SwizzleScanline(void *src, int srcPitch, void *dest, int destPitch, BufferFormat format, ImageBitFlags bitFlags)
{
int size = srcPitch.Min(destPitch);
uint r, g, b, a, pixel;
if (src == null)
{
throw new ArgumentNullException(nameof(src));
}
if (dest == null)
{
throw new ArgumentNullException(nameof(dest));
}
if (format == BufferFormat.Unknown)
{
throw new ArgumentException(string.Format(Resources.GORIMG_ERR_FORMAT_NOT_SUPPORTED, format),
nameof(format));
}
uint *srcPtr = (uint *)src;
uint *destPtr = (uint *)dest;
switch (format)
{
case BufferFormat.R10G10B10A2_Typeless:
case BufferFormat.R10G10B10A2_UInt:
case BufferFormat.R10G10B10A2_UNorm:
case BufferFormat.R10G10B10_Xr_Bias_A2_UNorm:
for (int i = 0; i < size; i += 4)
{
if (src != dest)
{
pixel = *(srcPtr++);
}
else
{
pixel = *(destPtr);
}
r = ((pixel & 0x3FF00000) >> 20);
g = (pixel & 0x000FFC00);
b = ((pixel & 0x000003FF) << 20);
a = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha) ? 0xC0000000 : pixel & 0xC0000000;
*destPtr = r | g | b | a;
destPtr++;
}
return;
case BufferFormat.R8G8B8A8_Typeless:
case BufferFormat.R8G8B8A8_UNorm:
case BufferFormat.R8G8B8A8_UNorm_SRgb:
case BufferFormat.B8G8R8A8_UNorm:
case BufferFormat.B8G8R8X8_UNorm:
case BufferFormat.B8G8R8A8_Typeless:
case BufferFormat.B8G8R8A8_UNorm_SRgb:
case BufferFormat.B8G8R8X8_Typeless:
case BufferFormat.B8G8R8X8_UNorm_SRgb:
for (int i = 0; i < size; i += 4)
{
if (src != dest)
{
pixel = *(srcPtr++);
}
else
{
pixel = *(destPtr);
}
r = ((pixel & 0xFF0000) >> 16);
g = (pixel & 0x00FF00);
b = ((pixel & 0x0000FF) << 16);
a = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha) ? 0xFF000000 : pixel & 0xFF000000;
*destPtr = r | g | b | a;
destPtr++;
}
return;
}
if (src != dest)
{
Unsafe.CopyBlock(dest, src, (uint)size);
}
}
/// <summary>
/// Function to copy (or update in-place) a line with opaque alpha substituion (if required).
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="format">Format of the destination buffer.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="ArgumentEmptyException">Thrown when the <paramref name="format"/> parameter is Unknown.</exception>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>Use this method to copy a single scanline of an image and (optionally) set an opaque constant alpha value.</remarks>
public static unsafe void CopyScanline(void *src, int srcPitch, void *dest, int destPitch, BufferFormat format, ImageBitFlags bitFlags)
{
if (src == null)
{
throw new ArgumentNullException(nameof(src));
}
if (dest == null)
{
throw new ArgumentNullException(nameof(dest));
}
if (format == BufferFormat.Unknown)
{
throw new ArgumentException(string.Format(Resources.GORIMG_ERR_FORMAT_NOT_SUPPORTED, format), nameof(format));
}
int size = (src == dest) ? destPitch : (srcPitch.Min(destPitch));
if ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha)
{
// Do a straight copy.
switch (format)
{
case BufferFormat.R32G32B32A32_Typeless:
case BufferFormat.R32G32B32A32_Float:
case BufferFormat.R32G32B32A32_UInt:
case BufferFormat.R32G32B32A32_SInt:
{
uint alpha = (format == BufferFormat.R32G32B32_Float) ? 0x3F800000
: ((format == BufferFormat.R32G32B32_SInt) ? 0x7FFFFFFF : 0xFFFFFFFF);
uint *srcPtr = (uint *)src;
uint *destPtr = (uint *)dest;
for (int i = 0; i < size; i += 16)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*(destPtr++) = *(srcPtr++);
*(destPtr++) = *(srcPtr++);
*(destPtr++) = *(srcPtr++);
}
*(destPtr++) = alpha;
}
}
return;
case BufferFormat.R16G16B16A16_Typeless:
case BufferFormat.R16G16B16A16_Float:
case BufferFormat.R16G16B16A16_UNorm:
case BufferFormat.R16G16B16A16_UInt:
case BufferFormat.R16G16B16A16_SNorm:
case BufferFormat.R16G16B16A16_SInt:
{
ushort alpha = 0xFFFF;
switch (format)
{
case BufferFormat.R16G16B16A16_Float:
alpha = 0x3C00;
break;
case BufferFormat.R16G16B16A16_SInt:
case BufferFormat.R16G16B16A16_SNorm:
alpha = 0x7FFF;
break;
}
ushort *srcPtr = (ushort *)src;
ushort *destPtr = (ushort *)dest;
for (int i = 0; i < size; i += 8)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = *srcPtr;
srcPtr += 4;
}
*destPtr += 3;
*(destPtr++) = alpha;
}
}
return;
case BufferFormat.R10G10B10A2_Typeless:
case BufferFormat.R10G10B10A2_UNorm:
case BufferFormat.R10G10B10A2_UInt:
case BufferFormat.R10G10B10_Xr_Bias_A2_UNorm:
{
uint *srcPtr = (uint *)src;
uint *destPtr = (uint *)dest;
for (int i = 0; i < size; i += 4)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = (*srcPtr) & 0x3FFFFFFF;
srcPtr++;
}
*destPtr |= 0xC0000000;
destPtr++;
}
}
return;
case BufferFormat.R8G8B8A8_Typeless:
case BufferFormat.R8G8B8A8_UNorm:
case BufferFormat.R8G8B8A8_UNorm_SRgb:
case BufferFormat.R8G8B8A8_UInt:
case BufferFormat.R8G8B8A8_SNorm:
case BufferFormat.R8G8B8A8_SInt:
case BufferFormat.B8G8R8A8_UNorm:
case BufferFormat.B8G8R8A8_Typeless:
case BufferFormat.B8G8R8A8_UNorm_SRgb:
{
uint alpha = ((format == BufferFormat.R8G8B8A8_SInt) || (format == BufferFormat.R8G8B8A8_SNorm)) ? 0x7F000000 : 0xFF000000;
uint *srcPtr = (uint *)src;
uint *destPtr = (uint *)dest;
for (int i = 0; i < size; i += 4)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = (*srcPtr) & 0xFFFFFF;
srcPtr++;
}
*destPtr |= alpha;
destPtr++;
}
}
return;
case BufferFormat.B4G4R4A4_UNorm:
{
ushort *srcPtr = (ushort *)src;
ushort *destPtr = (ushort *)dest;
for (int i = 0; i < size; i += 2)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*(destPtr++) = (ushort)((*srcPtr++) | 0xF000);
}
else
{
*(destPtr++) |= 0xF000;
}
}
}
return;
case BufferFormat.B5G5R5A1_UNorm:
{
ushort *srcPtr = (ushort *)src;
ushort *destPtr = (ushort *)dest;
for (int i = 0; i < size; i += 2)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*(destPtr++) = (ushort)((*srcPtr++) | 0x8000);
}
else
{
*(destPtr++) |= 0x8000;
}
}
}
return;
case BufferFormat.A8_UNorm:
Unsafe.InitBlock(dest, 0xff, (uint)size);
return;
}
}
// Copy if not doing an in-place update.
if (dest != src)
{
Unsafe.CopyBlock(dest, src, (uint)size);
}
}
/// <summary>
/// Function to copy (or update in-place) a line with opaque alpha substituion (if required).
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="format">Format of the destination buffer.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="System.ArgumentException">Thrown when the <paramref name="format"/> parameter is Unknown.</exception>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is NULL.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>Use this method to copy a single scanline of an image and (optionally) set an opaque constant alpha value.</remarks>
protected unsafe void CopyScanline(void *src, int srcPitch, void *dest, int destPitch, BufferFormat format, ImageBitFlags bitFlags)
{
if (src == null)
{
throw new ArgumentNullException("src");
}
if (dest == null)
{
throw new ArgumentNullException("dest");
}
if (format == BufferFormat.Unknown)
{
throw new ArgumentException(string.Format(Resources.GORGFX_FORMAT_NOT_SUPPORTED, BufferFormat.Unknown),
"format");
}
int size = (src == dest) ? destPitch : (srcPitch.Min(destPitch));
if ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha)
{
// Do a straight copy.
switch (format)
{
case BufferFormat.R32G32B32A32:
case BufferFormat.R32G32B32A32_Float:
case BufferFormat.R32G32B32A32_UInt:
case BufferFormat.R32G32B32A32_Int:
{
uint alpha = (format == BufferFormat.R32G32B32_Float) ? 0x3F800000
: ((format == BufferFormat.R32G32B32_Int) ? 0x7FFFFFFF : 0xFFFFFFFF);
var srcPtr = (uint *)src;
var destPtr = (uint *)dest;
for (int i = 0; i < size; i += 16)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = *srcPtr;
srcPtr += 4;
}
*destPtr += 3;
*(destPtr++) = alpha;
}
}
return;
case BufferFormat.R16G16B16A16:
case BufferFormat.R16G16B16A16_Float:
case BufferFormat.R16G16B16A16_UIntNormal:
case BufferFormat.R16G16B16A16_UInt:
case BufferFormat.R16G16B16A16_IntNormal:
case BufferFormat.R16G16B16A16_Int:
{
ushort alpha = 0xFFFF;
switch (format)
{
case BufferFormat.R16G16B16A16_Float:
alpha = 0x3C00;
break;
case BufferFormat.R16G16B16A16_Int:
case BufferFormat.R16G16B16A16_IntNormal:
alpha = 0x7FFF;
break;
}
var srcPtr = (ushort *)src;
var destPtr = (ushort *)dest;
for (int i = 0; i < size; i += 8)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = *srcPtr;
srcPtr += 4;
}
*destPtr += 3;
*(destPtr++) = alpha;
}
}
return;
case BufferFormat.R10G10B10A2:
case BufferFormat.R10G10B10A2_UIntNormal:
case BufferFormat.R10G10B10A2_UInt:
case BufferFormat.R10G10B10_XR_BIAS_A2_UIntNormal:
{
var srcPtr = (uint *)src;
var destPtr = (uint *)dest;
for (int i = 0; i < size; i += 4)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = (*srcPtr) & 0x3FFFFFFF;
srcPtr++;
}
*destPtr |= 0xC0000000;
destPtr++;
}
}
return;
case BufferFormat.R8G8B8A8:
case BufferFormat.R8G8B8A8_UIntNormal:
case BufferFormat.R8G8B8A8_UIntNormal_sRGB:
case BufferFormat.R8G8B8A8_UInt:
case BufferFormat.R8G8B8A8_IntNormal:
case BufferFormat.R8G8B8A8_Int:
case BufferFormat.B8G8R8A8_UIntNormal:
case BufferFormat.B8G8R8A8:
case BufferFormat.B8G8R8A8_UIntNormal_sRGB:
{
uint alpha = ((format == BufferFormat.R8G8B8A8_Int) || (format == BufferFormat.R8G8B8A8_IntNormal)) ? 0x7F000000 : 0xFF000000;
var srcPtr = (uint *)src;
var destPtr = (uint *)dest;
for (int i = 0; i < size; i += 4)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*destPtr = (*srcPtr) & 0xFFFFFF;
srcPtr++;
}
*destPtr |= alpha;
destPtr++;
}
}
return;
case BufferFormat.B5G5R5A1_UIntNormal:
{
var srcPtr = (ushort *)src;
var destPtr = (ushort *)dest;
for (int i = 0; i < size; i += 2)
{
// If not in-place copy, then copy from the source.
if (src != dest)
{
*(destPtr++) = (ushort)((*srcPtr++) | 0x8000);
}
else
{
*(destPtr++) |= 0x8000;
}
}
}
return;
case BufferFormat.A8_UIntNormal:
DirectAccess.FillMemory(dest, 0xFF, size);
return;
}
}
// Copy if not doing an in-place update.
if (dest != src)
{
DirectAccess.MemoryCopy(dest, src, size);
}
}
/// <summary>
/// Function to copy (or update in-place) with bits swizzled to match another format.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="format">Format of the destination buffer.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="System.ArgumentException">Thrown when the <paramref name="format"/> parameter is Unknown.</exception>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is NULL.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>Use this method to copy a single scanline and swizzle the bits of an image and (optionally) set an opaque constant alpha value.</remarks>
protected unsafe void SwizzleScanline(void *src, int srcPitch, void *dest, int destPitch, BufferFormat format, ImageBitFlags bitFlags)
{
int size = srcPitch.Min(destPitch);
uint r, g, b, a, pixel;
if (src == null)
{
throw new ArgumentNullException("src");
}
if (dest == null)
{
throw new ArgumentNullException("dest");
}
if (format == BufferFormat.Unknown)
{
throw new ArgumentException(string.Format(Resources.GORGFX_FORMAT_NOT_SUPPORTED, BufferFormat.Unknown),
"format");
}
var srcPtr = (uint *)src;
var destPtr = (uint *)dest;
switch (format)
{
case BufferFormat.R10G10B10A2:
case BufferFormat.R10G10B10A2_UInt:
case BufferFormat.R10G10B10A2_UIntNormal:
case BufferFormat.R10G10B10_XR_BIAS_A2_UIntNormal:
for (int i = 0; i < size; i += 4)
{
if (src != dest)
{
pixel = *(srcPtr++);
}
else
{
pixel = *(destPtr);
}
r = ((pixel & 0x3FF00000) >> 20);
g = (pixel & 0x000FFC00);
b = ((pixel & 0x000003FF) << 20);
a = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha) ? 0xC0000000 : pixel & 0xC0000000;
*destPtr = r | g | b | a;
destPtr++;
}
return;
case BufferFormat.R8G8B8A8:
case BufferFormat.R8G8B8A8_UIntNormal:
case BufferFormat.R8G8B8A8_UIntNormal_sRGB:
case BufferFormat.B8G8R8A8_UIntNormal:
case BufferFormat.B8G8R8X8_UIntNormal:
case BufferFormat.B8G8R8A8:
case BufferFormat.B8G8R8A8_UIntNormal_sRGB:
case BufferFormat.B8G8R8X8:
case BufferFormat.B8G8R8X8_UIntNormal_sRGB:
for (int i = 0; i < size; i += 4)
{
if (src != dest)
{
pixel = *(srcPtr++);
}
else
{
pixel = *(destPtr);
}
r = ((pixel & 0xFF0000) >> 16);
g = (pixel & 0x00FF00);
b = ((pixel & 0x0000FF) << 16);
a = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha) ? 0xFF000000 : pixel & 0xFF000000;
*destPtr = r | g | b | a;
destPtr++;
}
return;
}
if (src != dest)
{
DirectAccess.MemoryCopy(dest, src, size);
}
}
/// <summary>
/// Function to copy (or update in-place) with bits swizzled to match another format.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="format">Format of the destination buffer.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="System.ArgumentException">Thrown when the <paramref name="format"/> parameter is Unknown.</exception>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is NULL.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>Use this method to copy a single scanline and swizzle the bits of an image and (optionally) set an opaque constant alpha value.</remarks>
protected unsafe void SwizzleScanline(IntPtr src, int srcPitch, IntPtr dest, int destPitch, BufferFormat format, ImageBitFlags bitFlags)
{
SwizzleScanline(src.ToPointer(), srcPitch, dest.ToPointer(), destPitch, format, bitFlags);
}
/// <summary>
/// Function to expand a 16BPP scan line in an image to a 32BPP RGBA line.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="srcFormat">Format to convert from.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="System.ArgumentException">Thrown when the <paramref name="srcFormat" /> is not a 16 BPP format.</exception>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is NULL.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>
/// Use this to expand a 16 BPP (B5G6R5 or B5G5R5A1 format) into a 32 BPP R8G8B8A8 (normalized unsigned integer) format.
/// </remarks>
protected unsafe void Expand16BPPScanline(void *src, int srcPitch, BufferFormat srcFormat, void *dest, int destPitch, ImageBitFlags bitFlags)
{
var srcPtr = (ushort *)src;
var destPtr = (uint *)dest;
if ((srcFormat != BufferFormat.B5G5R5A1_UIntNormal) && (srcFormat != BufferFormat.B5G6R5_UIntNormal))
{
throw new ArgumentException(string.Format(Resources.GORGFX_IMAGE_NOT_16BPP, srcFormat), "srcFormat");
}
if (src == null)
{
throw new ArgumentNullException("src");
}
if (dest == null)
{
throw new ArgumentNullException("dest");
}
for (int srcCount = 0, destCount = 0; ((srcCount < srcPitch) && (destCount < destPitch)); srcCount += 2, destCount += 4)
{
ushort srcPixel = *(srcPtr++);
uint R = 0, G = 0, B = 0, A = 0;
switch (srcFormat)
{
case BufferFormat.B5G6R5_UIntNormal:
R = (uint)((srcPixel & 0xF800) >> 11);
G = (uint)((srcPixel & 0x07E0) >> 5);
B = (uint)(srcPixel & 0x001F);
R = ((R << 3) | (R >> 2));
G = ((G << 2) | (G >> 4)) << 8;
B = ((B << 3) | (B >> 2)) << 16;
A = 0xFF000000;
break;
case BufferFormat.B5G5R5A1_UIntNormal:
R = (uint)((srcPixel & 0x7C00) >> 10);
G = (uint)((srcPixel & 0x03E0) >> 5);
B = (uint)(srcPixel & 0x001F);
R = ((R << 3) | (R >> 2));
G = ((G << 3) | (G >> 2)) << 8;
B = ((B << 3) | (B >> 2)) << 16;
A = ((bitFlags & ImageBitFlags.OpaqueAlpha) == ImageBitFlags.OpaqueAlpha)
? 0xFF000000
: (((srcPixel & 0x8000) != 0) ? 0xFF000000 : 0);
break;
}
*(destPtr++) = R | G | B | A;
}
}
/// <summary>
/// Function to expand a 16BPP line in an image to a 32BPP RGBA line.
/// </summary>
/// <param name="src">The pointer to the source data.</param>
/// <param name="srcPitch">The pitch of the source data.</param>
/// <param name="srcFormat">Format to convert from.</param>
/// <param name="dest">The pointer to the destination data.</param>
/// <param name="destPitch">The pitch of the destination data.</param>
/// <param name="bitFlags">Image bit conversion control flags.</param>
/// <exception cref="System.ArgumentException">Thrown when the <paramref name="srcFormat"/> is not a 16 BPP format.</exception>
/// <exception cref="System.ArgumentNullException">Thrown when the <paramref name="src"/> or the <paramref name="dest"/> parameter is IntPtr.Zero.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown when the <paramref name="srcPitch"/> or the <paramref name="destPitch"/> parameter is less than 0.</exception>
/// <remarks>Use this to expand a 16 BPP (B5G6R5 or B5G5R5A1 format) into a 32 BPP R8G8B8A8 (normalized unsigned integer) format.
/// <para>This overload is for languages that don't support unsafe code (e.g. Visual Basic .NET).</para>
/// </remarks>
protected unsafe void Expand16BPPScanline(IntPtr src, int srcPitch, BufferFormat srcFormat, IntPtr dest, int destPitch, ImageBitFlags bitFlags)
{
Expand16BPPScanline(src.ToPointer(), srcPitch, srcFormat, dest.ToPointer(), destPitch, bitFlags);
}