Moved software rasterizer functionality to new directory.

1 files changed, 180 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_masking.c b/src/mesa/swrast/s_masking.c
new file mode 100644
index 0000000000..5831edf9c0
--- /dev/null
+++ b/src/mesa/swrast/s_masking.c
@@ -0,0 +1,180 @@
+/* $Id: s_masking.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.
+ */
+
+
+/*
+ * Implement the effect of glColorMask and glIndexMask in software.
+ */
+
+
+#include "glheader.h"
+#include "enums.h"
+#include "macros.h"
+
+#include "s_alphabuf.h"
+#include "s_masking.h"
+#include "s_pb.h"
+#include "s_span.h"
+
+
+/*
+ * Apply glColorMask to a span of RGBA pixels.
+ */
+void
+_mesa_mask_rgba_span( GLcontext *ctx,
+                      GLuint n, GLint x, GLint y, GLchan rgba[][4] )
+{
+   GLchan dest[MAX_WIDTH][4];
+   GLuint i;
+
+#if CHAN_BITS == 8
+
+   GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
+   GLuint dstMask = ~srcMask;
+   GLuint *rgba32 = (GLuint *) rgba;
+   GLuint *dest32 = (GLuint *) dest;
+
+   gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest );
+   for (i = 0; i < n; i++) {
+      rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
+   }
+
+#else
+
+   const GLint rMask = ctx->Color.ColorMask[RCOMP];
+   const GLint gMask = ctx->Color.ColorMask[GCOMP];
+   const GLint bMask = ctx->Color.ColorMask[BCOMP];
+   const GLint aMask = ctx->Color.ColorMask[ACOMP];
+
+   gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest );
+   for (i = 0; i < n; i++) {
+      if (!rMask)  rgba[i][RCOMP] = dest[i][RCOMP];
+      if (!gMask)  rgba[i][GCOMP] = dest[i][GCOMP];
+      if (!bMask)  rgba[i][BCOMP] = dest[i][BCOMP];
+      if (!aMask)  rgba[i][ACOMP] = dest[i][ACOMP];
+   }
+
+#endif
+}
+
+
+
+/*
+ * Apply glColorMask to an array of RGBA pixels.
+ */
+void
+_mesa_mask_rgba_pixels( GLcontext *ctx,
+                        GLuint n, const GLint x[], const GLint y[],
+                        GLchan rgba[][4], const GLubyte mask[] )
+{
+   GLchan dest[PB_SIZE][4];
+   GLuint i;
+
+#if CHAN_BITS == 8
+
+   GLuint srcMask = *((GLuint*)ctx->Color.ColorMask);
+   GLuint dstMask = ~srcMask;
+   GLuint *rgba32 = (GLuint *) rgba;
+   GLuint *dest32 = (GLuint *) dest;
+
+   (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
+   if (ctx->RasterMask & ALPHABUF_BIT) {
+      _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask );
+   }
+
+   for (i=0; i<n; i++) {
+      rgba32[i] = (rgba32[i] & srcMask) | (dest32[i] & dstMask);
+   }
+
+#else
+
+   const GLint rMask = ctx->Color.ColorMask[RCOMP];
+   const GLint gMask = ctx->Color.ColorMask[GCOMP];
+   const GLint bMask = ctx->Color.ColorMask[BCOMP];
+   const GLint aMask = ctx->Color.ColorMask[ACOMP];
+
+   (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
+   if (ctx->RasterMask & ALPHABUF_BIT) {
+      _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask );
+   }
+
+   for (i = 0; i < n; i++) {
+      if (!rMask)  rgba[i][RCOMP] = dest[i][RCOMP];
+      if (!gMask)  rgba[i][GCOMP] = dest[i][GCOMP];
+      if (!bMask)  rgba[i][BCOMP] = dest[i][BCOMP];
+      if (!aMask)  rgba[i][ACOMP] = dest[i][ACOMP];
+   }
+
+#endif
+}
+
+
+
+/*
+ * Apply glIndexMask to a span of CI pixels.
+ */
+void
+_mesa_mask_index_span( GLcontext *ctx,
+                       GLuint n, GLint x, GLint y, GLuint index[] )
+{
+   GLuint i;
+   GLuint fbindexes[MAX_WIDTH];
+   GLuint msrc, mdest;
+
+   gl_read_index_span( ctx, ctx->DrawBuffer, n, x, y, fbindexes );
+
+   msrc = ctx->Color.IndexMask;
+   mdest = ~msrc;
+
+   for (i=0;i<n;i++) {
+      index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
+   }
+}
+
+
+
+/*
+ * Apply glIndexMask to an array of CI pixels.
+ */
+void
+_mesa_mask_index_pixels( GLcontext *ctx,
+                         GLuint n, const GLint x[], const GLint y[],
+                         GLuint index[], const GLubyte mask[] )
+{
+   GLuint i;
+   GLuint fbindexes[PB_SIZE];
+   GLuint msrc, mdest;
+
+   (*ctx->Driver.ReadCI32Pixels)( ctx, n, x, y, fbindexes, mask );
+
+   msrc = ctx->Color.IndexMask;
+   mdest = ~msrc;
+
+   for (i=0;i<n;i++) {
+      index[i] = (index[i] & msrc) | (fbindexes[i] & mdest);
+   }
+}
+