From dbda49a9e65f684ca46c7af84cc52d63b0622978 Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
Date: Tue, 20 Jan 2009 11:12:17 +0100
Subject: Add RGBA4444 and RGBA5551 texture formats.

---
 src/mesa/main/texformat_tmp.h | 47 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/mesa/main/texformat_tmp.h')

diff --git a/src/mesa/main/texformat_tmp.h b/src/mesa/main/texformat_tmp.h
index 7499ba7b36..197593df74 100644
--- a/src/mesa/main/texformat_tmp.h
+++ b/src/mesa/main/texformat_tmp.h
@@ -803,6 +803,30 @@ static void store_texel_rgb565_rev(struct gl_texture_image *texImage,
 }
 #endif
 
+/* MESA_FORMAT_RGBA4444 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb444 texture, return 4 GLchans */
+static void FETCH(rgba4444)( const struct gl_texture_image *texImage,
+			     GLint i, GLint j, GLint k, GLchan *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = UBYTE_TO_CHAN( ((s >> 12) & 0xf) | ((s >> 8) & 0xf0) );
+   texel[GCOMP] = UBYTE_TO_CHAN( ((s >>  8) & 0xf) | ((s >> 4) & 0xf0) );
+   texel[BCOMP] = UBYTE_TO_CHAN( ((s >>  4) & 0xf) | ((s     ) & 0xf0) );
+   texel[ACOMP] = UBYTE_TO_CHAN( ((s      ) & 0xf) | ((s << 4) & 0xf0) );
+}
+
+#if DIM == 3
+static void store_texel_rgba4444(struct gl_texture_image *texImage,
+                                 GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_4444(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP], rgba[ACOMP]);
+}
+#endif
+
 
 /* MESA_FORMAT_ARGB4444 ******************************************************/
 
@@ -852,6 +876,29 @@ static void store_texel_argb4444_rev(struct gl_texture_image *texImage,
 }
 #endif
 
+/* MESA_FORMAT_RGBA5551 ******************************************************/
+
+/* Fetch texel from 1D, 2D or 3D argb1555 texture, return 4 GLchans */
+static void FETCH(rgba5551)( const struct gl_texture_image *texImage,
+			     GLint i, GLint j, GLint k, GLchan *texel )
+{
+   const GLushort *src = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   const GLushort s = *src;
+   texel[RCOMP] = UBYTE_TO_CHAN( ((s >>  8) & 0xf8) | ((s >> 13) & 0x7) );
+   texel[GCOMP] = UBYTE_TO_CHAN( ((s >>  3) & 0xf8) | ((s >>  8) & 0x7) );
+   texel[BCOMP] = UBYTE_TO_CHAN( ((s <<  2) & 0xf8) | ((s >>  3) & 0x7) );
+   texel[ACOMP] = UBYTE_TO_CHAN( ((s) & 0x01) ? 255 : 0);
+}
+
+#if DIM == 3
+static void store_texel_rgba5551(struct gl_texture_image *texImage,
+                                 GLint i, GLint j, GLint k, const void *texel)
+{
+   const GLubyte *rgba = (const GLubyte *) texel;
+   GLushort *dst = TEXEL_ADDR(GLushort, texImage, i, j, k, 1);
+   *dst = PACK_COLOR_5551(rgba[RCOMP], rgba[GCOMP], rgba[BCOMP], rgba[ACOMP]);
+}
+#endif
 
 /* MESA_FORMAT_ARGB1555 ******************************************************/
 
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