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gallium: new util_unpack_color_ub() function

This commit is contained in:
Brian Paul 2008-09-05 10:09:48 -06:00
parent 78a4589b10
commit 7071e774e4
1 changed files with 157 additions and 0 deletions
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157
src/gallium/auxiliary/util/u_pack_color.h
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@ -141,6 +141,161 @@ util_pack_color_ub(ubyte r, ubyte g, ubyte b, ubyte a,
}
/**
* Unpack RGBA from a packed pixel, returning values as ubytes in [0,255].
*/
static INLINE void
util_unpack_color_ub(enum pipe_format format, const void *src,
ubyte *r, ubyte *g, ubyte *b, ubyte *a)
{
switch (format) {
case PIPE_FORMAT_R8G8B8A8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 24) & 0xff);
*g = (ubyte) ((p >> 16) & 0xff);
*b = (ubyte) ((p >> 8) & 0xff);
*a = (ubyte) ((p >> 0) & 0xff);
}
return;
case PIPE_FORMAT_R8G8B8X8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 24) & 0xff);
*g = (ubyte) ((p >> 16) & 0xff);
*b = (ubyte) ((p >> 8) & 0xff);
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_A8R8G8B8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 16) & 0xff);
*g = (ubyte) ((p >> 8) & 0xff);
*b = (ubyte) ((p >> 0) & 0xff);
*a = (ubyte) ((p >> 24) & 0xff);
}
return;
case PIPE_FORMAT_X8R8G8B8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 16) & 0xff);
*g = (ubyte) ((p >> 8) & 0xff);
*b = (ubyte) ((p >> 0) & 0xff);
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_B8G8R8A8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 8) & 0xff);
*g = (ubyte) ((p >> 16) & 0xff);
*b = (ubyte) ((p >> 24) & 0xff);
*a = (ubyte) ((p >> 0) & 0xff);
}
return;
case PIPE_FORMAT_B8G8R8X8_UNORM:
{
uint p = ((const uint *) src)[0];
*r = (ubyte) ((p >> 8) & 0xff);
*g = (ubyte) ((p >> 16) & 0xff);
*b = (ubyte) ((p >> 24) & 0xff);
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_R5G6B5_UNORM:
{
ushort p = ((const ushort *) src)[0];
*r = (ubyte) (((p >> 8) & 0xf8) | ((p >> 13) & 0x7));
*g = (ubyte) (((p >> 3) & 0xfc) | ((p >> 9) & 0x3));
*b = (ubyte) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_A1R5G5B5_UNORM:
{
ushort p = ((const ushort *) src)[0];
*r = (ubyte) (((p >> 7) & 0xf8) | ((p >> 12) & 0x7));
*g = (ubyte) (((p >> 2) & 0xf8) | ((p >> 7) & 0x7));
*b = (ubyte) (((p << 3) & 0xf8) | ((p >> 2) & 0x7));
*a = (ubyte) (0xff * (p >> 15));
}
return;
case PIPE_FORMAT_A4R4G4B4_UNORM:
{
ushort p = ((const ushort *) src)[0];
*r = (ubyte) (((p >> 4) & 0xf0) | ((p >> 8) & 0xf));
*g = (ubyte) (((p >> 0) & 0xf0) | ((p >> 4) & 0xf));
*b = (ubyte) (((p << 4) & 0xf0) | ((p >> 0) & 0xf));
*a = (ubyte) (((p >> 8) & 0xf0) | ((p >> 12) & 0xf));
}
return;
case PIPE_FORMAT_A8_UNORM:
{
ubyte p = ((const ubyte *) src)[0];
*r = *g = *b = (ubyte) 0xff;
*a = p;
}
return;
case PIPE_FORMAT_L8_UNORM:
{
ubyte p = ((const ubyte *) src)[0];
*r = *g = *b = p;
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_I8_UNORM:
{
ubyte p = ((const ubyte *) src)[0];
*r = *g = *b = *a = p;
}
return;
case PIPE_FORMAT_R32G32B32A32_FLOAT:
{
const float *p = (const float *) src;
*r = float_to_ubyte(p[0]);
*g = float_to_ubyte(p[1]);
*b = float_to_ubyte(p[2]);
*a = float_to_ubyte(p[3]);
}
return;
case PIPE_FORMAT_R32G32B32_FLOAT:
{
const float *p = (const float *) src;
*r = float_to_ubyte(p[0]);
*g = float_to_ubyte(p[1]);
*b = float_to_ubyte(p[2]);
*a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_R32G32_FLOAT:
{
const float *p = (const float *) src;
*r = float_to_ubyte(p[0]);
*g = float_to_ubyte(p[1]);
*b = *a = (ubyte) 0xff;
}
return;
case PIPE_FORMAT_R32_FLOAT:
{
const float *p = (const float *) src;
*r = float_to_ubyte(p[0]);
*g = *b = *a = (ubyte) 0xff;
}
return;
/* XXX lots more cases to add */
default:
debug_print_format("gallium: unhandled format in util_unpack_color_ub()",
format);
assert(0);
}
}
/**
* Note rgba outside [0,1] will be clamped for int pixel formats.
*/
@ -157,6 +312,8 @@ util_pack_color(const float rgba[4], enum pipe_format format, void *dest)
a = float_to_ubyte(rgba[3]);
}
printf("%s %s\n", __FUNCTION__, pf_name(format));
switch (format) {
case PIPE_FORMAT_R8G8B8A8_UNORM:
{