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authorBrian Paul <brian.paul@tungstengraphics.com>2008-09-05 10:09:48 -0600
committerBrian Paul <brian.paul@tungstengraphics.com>2008-09-05 10:09:48 -0600
commit7071e774e49f0e7b5997ab634f5523efb2666952 (patch)
treec77b256caaca3c94a7cd504c5c1f3a556b2e140a
parent78a4589b10b765dfb2a5862f292e51e0f4b06dce (diff)
gallium: new util_unpack_color_ub() function
-rw-r--r--src/gallium/auxiliary/util/u_pack_color.h157
1 files changed, 157 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_pack_color.h b/src/gallium/auxiliary/util/u_pack_color.h
index 39e4ae9d07..43cb7e56ec 100644
--- a/src/gallium/auxiliary/util/u_pack_color.h
+++ b/src/gallium/auxiliary/util/u_pack_color.h
@@ -142,6 +142,161 @@ 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.
*/
static INLINE void
@@ -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:
{