1 files changed, 80 insertions, 0 deletions
diff --git a/src/mesa/swrast/s_pixeltex.c b/src/mesa/swrast/s_pixeltex.c
new file mode 100644
index 00000000000..854482a2516
--- /dev/null
+++ b/src/mesa/swrast/s_pixeltex.c
@@ -0,0 +1,80 @@
+/* $Id: s_pixeltex.c,v 1.1 2000/10/31 18:00:04 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ * 
+ * Copyright (C) 1999-2000  Brian Paul   All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+
+/*
+ * This file implements both the GL_SGIX_pixel_texture and
+ * GL_SIGS_pixel_texture extensions. Luckily, they pretty much
+ * overlap in functionality so we use the same state variables
+ * and execution code for both.
+ */
+
+
+#include "glheader.h"
+#include "colormac.h"
+
+#include "s_pixeltex.h"
+
+
+/*
+ * Convert RGBA values into strq texture coordinates.
+ */
+void
+_mesa_pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
+                  GLfloat s[], GLfloat t[], GLfloat r[], GLfloat q[])
+{
+   if (ctx->Pixel.FragmentRgbSource == GL_CURRENT_RASTER_COLOR) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         s[i] = ctx->Current.RasterColor[RCOMP];
+         t[i] = ctx->Current.RasterColor[GCOMP];
+         r[i] = ctx->Current.RasterColor[BCOMP];
+      }
+   }
+   else {
+      GLuint i;
+      ASSERT(ctx->Pixel.FragmentRgbSource == GL_PIXEL_GROUP_COLOR_SGIS);
+      for (i = 0; i < n; i++) {
+         s[i] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
+         t[i] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
+         r[i] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
+      }
+   }
+
+   if (ctx->Pixel.FragmentAlphaSource == GL_CURRENT_RASTER_COLOR) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         q[i] = ctx->Current.RasterColor[ACOMP];
+      }
+   }
+   else {
+      GLuint i;
+      ASSERT(ctx->Pixel.FragmentAlphaSource == GL_PIXEL_GROUP_COLOR_SGIS);
+      for (i = 0; i < n; i++) {
+         q[i] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
+      }
+   }
+}