From f4092abdf94af6a99aff944d6264bc1284e8bdd4 Mon Sep 17 00:00:00 2001
From: Reinhard Tartler <siretart@tauware.de>
Date: Mon, 10 Oct 2011 17:43:39 +0200
Subject: Imported nx-X11-3.1.0-1.tar.gz

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository
---
 nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c | 111 ++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c

(limited to 'nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c')

diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c
new file mode 100644
index 000000000..1c65290d4
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/swrast/s_pixeltex.c
@@ -0,0 +1,111 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2004  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 "imports.h"
+
+#include "s_context.h"
+#include "s_pixeltex.h"
+#include "s_texture.h"
+
+
+/*
+ * Convert RGBA values into strq texture coordinates.
+ */
+static void
+pixeltexgen(GLcontext *ctx, GLuint n, const GLchan rgba[][4],
+            GLfloat texcoord[][4])
+{
+   if (ctx->Pixel.FragmentRgbSource == GL_CURRENT_RASTER_COLOR) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         texcoord[i][0] = ctx->Current.RasterColor[RCOMP];
+         texcoord[i][1] = ctx->Current.RasterColor[GCOMP];
+         texcoord[i][2] = ctx->Current.RasterColor[BCOMP];
+      }
+   }
+   else {
+      GLuint i;
+      ASSERT(ctx->Pixel.FragmentRgbSource == GL_PIXEL_GROUP_COLOR_SGIS);
+      for (i = 0; i < n; i++) {
+         texcoord[i][0] = CHAN_TO_FLOAT(rgba[i][RCOMP]);
+         texcoord[i][1] = CHAN_TO_FLOAT(rgba[i][GCOMP]);
+         texcoord[i][2] = CHAN_TO_FLOAT(rgba[i][BCOMP]);
+      }
+   }
+
+   if (ctx->Pixel.FragmentAlphaSource == GL_CURRENT_RASTER_COLOR) {
+      GLuint i;
+      for (i = 0; i < n; i++) {
+         texcoord[i][3] = ctx->Current.RasterColor[ACOMP];
+      }
+   }
+   else {
+      GLuint i;
+      ASSERT(ctx->Pixel.FragmentAlphaSource == GL_PIXEL_GROUP_COLOR_SGIS);
+      for (i = 0; i < n; i++) {
+         texcoord[i][3] = CHAN_TO_FLOAT(rgba[i][ACOMP]);
+      }
+   }
+}
+
+
+
+/*
+ * Used by glDraw/CopyPixels: the incoming image colors are treated
+ * as texture coordinates.  Use those coords to texture the image.
+ * This is for GL_SGIS_pixel_texture / GL_SGIX_pixel_texture.
+ */
+void
+_swrast_pixel_texture(GLcontext *ctx, struct sw_span *span)
+{
+   GLuint unit;
+
+   ASSERT(!(span->arrayMask & SPAN_TEXTURE));
+   span->arrayMask |= SPAN_TEXTURE;
+   span->interpMask &= ~SPAN_TEXTURE;
+
+   /* convert colors into texture coordinates */
+   pixeltexgen( ctx, span->end,
+                (const GLchan (*)[4]) span->array->rgba,
+                span->array->texcoords[0] );
+
+   /* copy the new texture units for all enabled units */
+   for (unit = 1; unit < ctx->Const.MaxTextureUnits; unit++) {
+      if (ctx->Texture.Unit[unit]._ReallyEnabled) {
+         MEMCPY( span->array->texcoords[unit], span->array->texcoords[0],
+                 span->end * 4 * sizeof(GLfloat) );
+      }
+   }
+}
-- 
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