From e3a051e0538a605551f4d58294c94f5eb00ed07f Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Tue, 31 Oct 2000 18:00:04 +0000
Subject: Moved software rasterizer functionality to new directory.

---
 src/mesa/swrast/s_logic.c | 360 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 360 insertions(+)
 create mode 100644 src/mesa/swrast/s_logic.c

(limited to 'src/mesa/swrast/s_logic.c')

diff --git a/src/mesa/swrast/s_logic.c b/src/mesa/swrast/s_logic.c
new file mode 100644
index 00000000000..760d7e7065d
--- /dev/null
+++ b/src/mesa/swrast/s_logic.c
@@ -0,0 +1,360 @@
+/* $Id: s_logic.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.
+ */
+
+
+#include "glheader.h"
+#include "context.h"
+#include "macros.h"
+
+#include "s_alphabuf.h"
+#include "s_logic.h"
+#include "s_pb.h"
+#include "s_span.h"
+
+
+
+/*
+ * Apply logic op to array of CI pixels.
+ */
+static void index_logicop( GLcontext *ctx, GLuint n,
+                           GLuint index[], const GLuint dest[],
+                           const GLubyte mask[] )
+{
+   GLuint i;
+   switch (ctx->Color.LogicOp) {
+      case GL_CLEAR:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = 0;
+	    }
+	 }
+	 break;
+      case GL_SET:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = 1;
+	    }
+	 }
+	 break;
+      case GL_COPY:
+	 /* do nothing */
+	 break;
+      case GL_COPY_INVERTED:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~index[i];
+	    }
+	 }
+	 break;
+      case GL_NOOP:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = dest[i];
+	    }
+	 }
+	 break;
+      case GL_INVERT:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~dest[i];
+	    }
+	 }
+	 break;
+      case GL_AND:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] &= dest[i];
+	    }
+	 }
+	 break;
+      case GL_NAND:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~(index[i] & dest[i]);
+	    }
+	 }
+	 break;
+      case GL_OR:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] |= dest[i];
+	    }
+	 }
+	 break;
+      case GL_NOR:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~(index[i] | dest[i]);
+	    }
+	 }
+	 break;
+      case GL_XOR:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] ^= dest[i];
+	    }
+	 }
+	 break;
+      case GL_EQUIV:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~(index[i] ^ dest[i]);
+	    }
+	 }
+	 break;
+      case GL_AND_REVERSE:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = index[i] & ~dest[i];
+	    }
+	 }
+	 break;
+      case GL_AND_INVERTED:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~index[i] & dest[i];
+	    }
+	 }
+	 break;
+      case GL_OR_REVERSE:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = index[i] | ~dest[i];
+	    }
+	 }
+	 break;
+      case GL_OR_INVERTED:
+         for (i=0;i<n;i++) {
+	    if (mask[i]) {
+	       index[i] = ~index[i] | dest[i];
+	    }
+	 }
+	 break;
+      default:
+	 gl_error( ctx, GL_INVALID_ENUM, "gl_logic error" );
+   }
+}
+
+
+
+/*
+ * Apply the current logic operator to a span of CI pixels.  This is only
+ * used if the device driver can't do logic ops.
+ */
+void
+_mesa_logicop_ci_span( GLcontext *ctx, GLuint n, GLint x, GLint y,
+                       GLuint index[], const GLubyte mask[] )
+{
+   GLuint dest[MAX_WIDTH];
+   /* Read dest values from frame buffer */
+   (*ctx->Driver.ReadCI32Span)( ctx, n, x, y, dest );
+   index_logicop( ctx, n, index, dest, mask );
+}
+
+
+
+/*
+ * Apply the current logic operator to an array of CI pixels.  This is only
+ * used if the device driver can't do logic ops.
+ */
+void
+_mesa_logicop_ci_pixels( GLcontext *ctx,
+                         GLuint n, const GLint x[], const GLint y[],
+                         GLuint index[], const GLubyte mask[] )
+{
+   GLuint dest[PB_SIZE];
+   /* Read dest values from frame buffer */
+   (*ctx->Driver.ReadCI32Pixels)( ctx, n, x, y, dest, mask );
+   index_logicop( ctx, n, index, dest, mask );
+}
+
+
+
+/*
+ * Apply logic operator to rgba pixels.
+ * Input:  ctx - the context
+ *         n - number of pixels
+ *         mask - pixel mask array
+ * In/Out:  src - incoming pixels which will be modified
+ * Input:  dest - frame buffer values
+ *
+ * Note:  Since the R, G, B, and A channels are all treated the same we
+ * process them as 4-byte GLuints instead of four GLubytes.
+ */
+static void rgba_logicop( const GLcontext *ctx, GLuint n,
+                          const GLubyte mask[],
+                          GLuint src[], const GLuint dest[] )
+{
+   GLuint i;
+   switch (ctx->Color.LogicOp) {
+      case GL_CLEAR:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = 0;
+            }
+         }
+         break;
+      case GL_SET:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = 0xffffffff;
+            }
+         }
+         break;
+      case GL_COPY:
+         /* do nothing */
+         break;
+      case GL_COPY_INVERTED:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~src[i];
+            }
+         }
+         break;
+      case GL_NOOP:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = dest[i];
+            }
+         }
+         break;
+      case GL_INVERT:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~dest[i];
+            }
+         }
+         break;
+      case GL_AND:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] &= dest[i];
+            }
+         }
+         break;
+      case GL_NAND:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~(src[i] & src[i]);
+            }
+         }
+         break;
+      case GL_OR:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i]|= dest[i];
+            }
+         }
+         break;
+      case GL_NOR:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~(src[i] | dest[i]);
+            }
+         }
+         break;
+      case GL_XOR:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] ^= dest[i];
+            }
+         }
+         break;
+      case GL_EQUIV:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~(src[i] ^ dest[i]);
+            }
+         }
+         break;
+      case GL_AND_REVERSE:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = src[i] & ~dest[i];
+            }
+         }
+         break;
+      case GL_AND_INVERTED:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~src[i] & dest[i];
+            }
+         }
+         break;
+      case GL_OR_REVERSE:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = src[i] | ~dest[i];
+            }
+         }
+         break;
+      case GL_OR_INVERTED:
+         for (i=0;i<n;i++) {
+            if (mask[i]) {
+               src[i] = ~src[i] | dest[i];
+            }
+         }
+         break;
+      default:
+         /* should never happen */
+         gl_problem(ctx, "Bad function in rgba_logicop");
+   }
+}
+
+
+
+/*
+ * Apply the current logic operator to a span of RGBA pixels.
+ * This is only used if the device driver can't do logic ops.
+ */
+void
+_mesa_logicop_rgba_span( GLcontext *ctx,
+                         GLuint n, GLint x, GLint y,
+                         GLchan rgba[][4], const GLubyte mask[] )
+{
+   GLchan dest[MAX_WIDTH][4];
+   gl_read_rgba_span( ctx, ctx->DrawBuffer, n, x, y, dest );
+   rgba_logicop( ctx, n, mask, (GLuint *) rgba, (const GLuint *) dest );
+}
+
+
+
+/*
+ * Apply the current logic operator to an array of RGBA pixels.
+ * This is only used if the device driver can't do logic ops.
+ */
+void
+_mesa_logicop_rgba_pixels( GLcontext *ctx,
+                           GLuint n, const GLint x[], const GLint y[],
+                           GLchan rgba[][4], const GLubyte mask[] )
+{
+   GLchan dest[PB_SIZE][4];
+   (*ctx->Driver.ReadRGBAPixels)( ctx, n, x, y, dest, mask );
+   if (ctx->RasterMask & ALPHABUF_BIT) {
+      _mesa_read_alpha_pixels( ctx, n, x, y, dest, mask );
+   }
+   rgba_logicop( ctx, n, mask, (GLuint *) rgba, (const GLuint *) dest );
+}
-- 
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