From 069965f1709d7bcaecca0db9baf6b18e6f20f598 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Sat, 22 Jan 2000 20:08:36 +0000
Subject: updated SVGA sources from Mesa 3.2

---
 src/mesa/drivers/svga/svgamesa15.c | 178 +++++++++++++++++++++++++++++++++++++
 1 file changed, 178 insertions(+)
 create mode 100644 src/mesa/drivers/svga/svgamesa15.c

(limited to 'src/mesa/drivers/svga/svgamesa15.c')

diff --git a/src/mesa/drivers/svga/svgamesa15.c b/src/mesa/drivers/svga/svgamesa15.c
new file mode 100644
index 0000000000..f5a4df515b
--- /dev/null
+++ b/src/mesa/drivers/svga/svgamesa15.c
@@ -0,0 +1,178 @@
+/* $Id: svgamesa15.c,v 1.2 2000/01/22 20:08:36 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.2
+ * Copyright (C) 1995-2000  Brian Paul
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+/*
+ * SVGA driver for Mesa.
+ * Original author:  Brian Paul
+ * Additional authors:  Slawomir Szczyrba <steev@hot.pl>  (Mesa 3.2)
+ */
+
+
+#include "svgapix.h"
+
+GLshort * shortBuffer;
+
+int __svga_drawpixel15(int x, int y, unsigned long c)
+{
+    unsigned long offset;
+    
+    shortBuffer=(void *)SVGABuffer.BackBuffer;
+    y = SVGAInfo->height-y-1;
+    offset = y * SVGAInfo->width + x;
+    shortBuffer[offset]=c;
+    return 0;
+}
+
+unsigned long __svga_getpixel15(int x, int y)
+{
+    unsigned long offset;
+
+    shortBuffer=(void *)SVGABuffer.BackBuffer;
+    y = SVGAInfo->height-y-1;
+    offset = y * SVGAInfo->width + x;
+    return shortBuffer[offset];
+}
+
+void __set_color15( GLcontext *ctx,
+                    GLubyte red, GLubyte green,
+                    GLubyte blue, GLubyte alpha )
+{
+   SVGAMesa->hicolor=(red>>3)<<10 | (green>>3)<<5 | (blue>>3); 
+/*   SVGAMesa->hicolor=(red)<<10 | (green)<<5 | (blue); */
+}   
+
+void __clear_color15( GLcontext *ctx,
+                      GLubyte red, GLubyte green,
+                      GLubyte blue, GLubyte alpha )
+{
+   SVGAMesa->clear_hicolor=(red>>3)<<10 | (green>>3)<<5 | (blue>>3);  
+/*   SVGAMesa->clear_hicolor=(red)<<10 | (green)<<5 | (blue);*/
+}   
+
+GLbitfield __clear15( GLcontext *ctx, GLbitfield mask, GLboolean all,
+                      GLint x, GLint y, GLint width, GLint height )
+{
+   int i,j;
+   
+   if (mask & GL_COLOR_BUFFER_BIT) {
+    shortBuffer=(void *)SVGABuffer.BackBuffer;
+    if (all) {
+     for (i=0;i<SVGABuffer.BufferSize / 2;i++) shortBuffer[i]=SVGAMesa->clear_hicolor;
+    } else {
+    for (i=x;i<width;i++)    
+     for (j=y;j<height;j++)    
+      __svga_drawpixel15(i,j,SVGAMesa->clear_hicolor);
+    }	
+   }    
+   return mask & (~GL_COLOR_BUFFER_BIT);
+}
+
+void __write_rgba_span15( const GLcontext *ctx, GLuint n, GLint x, GLint y,
+                          const GLubyte rgba[][4], const GLubyte mask[] )
+{
+   int i;
+   if (mask) {
+      /* draw some pixels */
+      for (i=0; i<n; i++, x++) {
+         if (mask[i]) {
+         __svga_drawpixel15( x, y, (rgba[i][RCOMP]>>3)<<10 | \
+			           (rgba[i][GCOMP]>>3)<<5 |  \
+			           (rgba[i][BCOMP]>>3));
+         }
+      }
+   }
+   else {
+      /* draw all pixels */
+      for (i=0; i<n; i++, x++) {
+         __svga_drawpixel15( x, y, (rgba[i][RCOMP]>>3)<<10 | \
+			           (rgba[i][GCOMP]>>3)<<5  | \
+			           (rgba[i][BCOMP]>>3));
+      }
+   }
+}
+
+void __write_mono_rgba_span15( const GLcontext *ctx,
+                               GLuint n, GLint x, GLint y,
+                               const GLubyte mask[])
+{
+   int i;
+   for (i=0; i<n; i++, x++) {
+      if (mask[i]) {
+         __svga_drawpixel15( x, y, SVGAMesa->hicolor);
+      }
+   }
+}
+
+void __read_rgba_span15( const GLcontext *ctx, GLuint n, GLint x, GLint y,
+                         GLubyte rgba[][4] )
+{
+   int i,pix;
+   for (i=0; i<n; i++, x++) {
+    pix = __svga_getpixel15( x, y);
+    rgba[i][RCOMP] = ((pix>>10)<<3) & 0xff;
+    rgba[i][GCOMP] = ((pix>> 5)<<3) & 0xff;
+    rgba[i][BCOMP] = ((pix    )<<3) & 0xff;
+   }
+}
+
+void __write_rgba_pixels15( const GLcontext *ctx,
+                            GLuint n, const GLint x[], const GLint y[],
+                            const GLubyte rgba[][4], const GLubyte mask[] )
+{
+   int i;
+   for (i=0; i<n; i++) {
+      if (mask[i]) {
+         __svga_drawpixel15( x[i], y[i], (rgba[i][RCOMP]>>3)<<10 | \
+			                 (rgba[i][GCOMP]>>3)<<5  | \
+			                 (rgba[i][BCOMP]>>3));
+      }
+   }
+}
+
+
+void __write_mono_rgba_pixels15( const GLcontext *ctx,
+                                 GLuint n,
+                                 const GLint x[], const GLint y[],
+                                 const GLubyte mask[] )
+{
+   int i;
+   /* use current rgb color */
+   for (i=0; i<n; i++) {
+      if (mask[i]) {
+         __svga_drawpixel15( x[i], y[i], SVGAMesa->hicolor );
+      }
+   }
+}
+
+void __read_rgba_pixels15( const GLcontext *ctx,
+                           GLuint n, const GLint x[], const GLint y[],
+                           GLubyte rgba[][4], const GLubyte mask[] )
+{
+   int i,pix;
+   for (i=0; i<n; i++,x++) {
+    pix = __svga_getpixel15( x[i], y[i] );
+    rgba[i][RCOMP] = ((pix>>10)<<3) & 0xff;
+    rgba[i][GCOMP] = ((pix>> 5)<<3) & 0xff;
+    rgba[i][BCOMP] = ((pix    )<<3) & 0xff;
+   }
+}
-- 
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