updated SVGA sources from Mesa 3.2

1 files changed, 176 insertions, 0 deletions

diff --git a/src/mesa/drivers/svga/svgamesa32.c b/src/mesa/drivers/svga/svgamesa32.c
new file mode 100644
index 00000000000..204d582cf3d
--- /dev/null
+++ b/src/mesa/drivers/svga/svgamesa32.c
@@ -0,0 +1,176 @@
+/* $Id: svgamesa32.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 <[email protected]>  (Mesa 3.2)
+ */
+
+
+#include "svgapix.h"
+
+GLint * intBuffer;
+
+inline int RGB2BGR32(int c)
+{
+	asm("rorw  $8, %0\n"	 
+	    "rorl $16, %0\n"	 
+	    "rorw  $8, %0\n"	 
+	    "shrl  $8, %0\n"	 
+      : "=q"(c):"0"(c));
+    return c;
+}
+
+int __svga_drawpixel32(int x, int y, unsigned long c)
+{
+    unsigned long offset;
+
+    intBuffer=(void *)SVGABuffer.BackBuffer;
+    y = SVGAInfo->height-y-1;
+    offset = y * SVGAInfo->width + x;
+    intBuffer[offset]=c;
+    return 0;
+}
+
+unsigned long __svga_getpixel32(int x, int y)
+{
+    unsigned long offset;
+
+    intBuffer=(void *)SVGABuffer.BackBuffer;
+    y = SVGAInfo->height-y-1;
+    offset = y * SVGAInfo->width + x;
+    return intBuffer[offset];
+}
+
+void __set_color32( GLcontext *ctx,
+                    GLubyte red, GLubyte green,
+                    GLubyte blue, GLubyte alpha )
+{
+   SVGAMesa->red = red;
+   SVGAMesa->green = green;
+   SVGAMesa->blue = blue;
+   SVGAMesa->truecolor = red<<16 | green<<8 | blue;
+}
+
+void __clear_color32( GLcontext *ctx,
+                      GLubyte red, GLubyte green,
+                      GLubyte blue, GLubyte alpha )
+{
+   SVGAMesa->clear_truecolor = red<<16 | green<<8 | blue;
+}
+
+GLbitfield __clear32( GLcontext *ctx, GLbitfield mask, GLboolean all,
+                        GLint x, GLint y, GLint width, GLint height )
+{
+   int i,j;
+   
+   if (mask & GL_COLOR_BUFFER_BIT) {
+    if (all) {
+     intBuffer=(void *)SVGABuffer.BackBuffer;
+     for (i=0;i<SVGABuffer.BufferSize / 4;i++) intBuffer[i]=SVGAMesa->clear_truecolor;
+    } else {
+    for (i=x;i<width;i++)    
+     for (j=y;j<height;j++)    
+      __svga_drawpixel32(i,j,SVGAMesa->clear_truecolor);
+    }	
+   }
+   return mask & (~GL_COLOR_BUFFER_BIT);
+}
+
+void __write_rgba_span32( 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_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i])));
+         }
+      }
+   }
+   else {
+      /* draw all pixels */
+      for (i=0; i<n; i++, x++) {
+         __svga_drawpixel32( x, y, RGB2BGR32(*((GLint*)rgba[i])));
+      }
+   }
+}
+
+void __write_mono_rgba_span32( 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_drawpixel32( x, y, SVGAMesa->truecolor);
+      }
+   }
+}
+
+void __read_rgba_span32( const GLcontext *ctx, GLuint n, GLint x, GLint y,
+                         GLubyte rgba[][4] )
+{
+   int i;
+   for (i=0; i<n; i++, x++) {
+     *((GLint*)rgba[i]) = RGB2BGR32(__svga_getpixel32( x, y ));
+   }
+}
+
+void __write_rgba_pixels32( 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_drawpixel32( x[i], y[i], RGB2BGR32(*((GLint*)rgba[i])));
+      }
+   }
+}
+
+void __write_mono_rgba_pixels32( 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_drawpixel32( x[i], y[i], SVGAMesa->truecolor );
+      }
+   }
+}
+
+void __read_rgba_pixels32( const GLcontext *ctx,
+                           GLuint n, const GLint x[], const GLint y[],
+                           GLubyte rgba[][4], const GLubyte mask[] )
+{
+   int i;
+   for (i=0; i<n; i++,x++) {
+    *((GLint*)rgba[i]) = RGB2BGR32(__svga_getpixel32( x[i], y[i] ));
+   }
+}