New files

1 files changed, 150 insertions, 0 deletions

diff --git a/src/mesa/swrast/s_imaging.c b/src/mesa/swrast/s_imaging.c
new file mode 100644
index 00000000000..56cf9ca7edc
--- /dev/null
+++ b/src/mesa/swrast/s_imaging.c
@@ -0,0 +1,150 @@
+/* $Id: s_imaging.c,v 1.4 2001/03/19 02:28:59 keithw Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.5
+ *
+ * Copyright (C) 1999-2001  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.
+ */
+
+/* KW:  Moved these here to remove knowledge of swrast from core mesa.
+ * Should probably pull the entire software implementation of these
+ * extensions into either swrast or a sister module.  
+ */
+
+#include "s_context.h"
+#include "s_span.h"
+
+void
+_swrast_CopyColorTable( GLcontext *ctx, 
+			GLenum target, GLenum internalformat,
+			GLint x, GLint y, GLsizei width)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLchan data[MAX_WIDTH][4];
+
+   /* Select buffer to read from */
+   (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+                                 ctx->Pixel.DriverReadBuffer );
+
+   if (width > MAX_WIDTH)
+      width = MAX_WIDTH;
+
+   /* read the data from framebuffer */
+   _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data );
+
+   /* Restore reading from draw buffer (the default) */
+   (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+                                 ctx->Color.DriverDrawBuffer );
+
+   glColorTable(target, internalformat, width, GL_RGBA, GL_UNSIGNED_BYTE, data);
+}
+
+void
+_swrast_CopyColorSubTable( GLcontext *ctx,GLenum target, GLsizei start,
+			   GLint x, GLint y, GLsizei width)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLchan data[MAX_WIDTH][4];
+
+   /* Select buffer to read from */
+   (*swrast->Driver.SetReadBuffer)( ctx, ctx->ReadBuffer,
+                                 ctx->Pixel.DriverReadBuffer );
+
+   if (width > MAX_WIDTH)
+      width = MAX_WIDTH;
+
+   /* read the data from framebuffer */
+   _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y, data );
+
+   /* Restore reading from draw buffer (the default) */
+   (*swrast->Driver.SetReadBuffer)( ctx, ctx->DrawBuffer,
+                                 ctx->Color.DriverDrawBuffer );
+
+   glColorSubTable(target, start, width, GL_RGBA, GL_UNSIGNED_BYTE, data);
+}
+
+
+void
+_swrast_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target, 
+				GLenum internalFormat, 
+				GLint x, GLint y, GLsizei width)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   GLchan rgba[MAX_CONVOLUTION_WIDTH][4];
+
+   RENDER_START( swrast, ctx );
+
+   /* read the data from framebuffer */
+   _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y,
+				(GLchan (*)[4]) rgba );
+   
+   RENDER_FINISH( swrast, ctx );
+
+   /* store as convolution filter */
+   glConvolutionFilter1D(target, internalFormat, width,
+			 GL_RGBA, CHAN_TYPE, rgba);
+}
+
+
+void
+_swrast_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target, 
+				GLenum internalFormat, 
+				GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   SWcontext *swrast = SWRAST_CONTEXT(ctx);
+   struct gl_pixelstore_attrib packSave;
+   GLchan rgba[MAX_CONVOLUTION_HEIGHT][MAX_CONVOLUTION_WIDTH][4];
+   GLint i;
+
+   RENDER_START(swrast,ctx);
+   
+   /* read pixels from framebuffer */
+   for (i = 0; i < height; i++) {
+      _mesa_read_rgba_span( ctx, ctx->ReadBuffer, width, x, y + i,
+				(GLchan (*)[4]) rgba[i] );
+   }
+
+   RENDER_FINISH(swrast,ctx);
+
+   /*
+    * HACK: save & restore context state so we can store this as a
+    * convolution filter via the GL api.  Doesn't call any callbacks
+    * hanging off ctx->Unpack statechanges.
+    */
+
+   packSave = ctx->Unpack;  /* save pixel packing params */
+
+   ctx->Unpack.Alignment = 1;
+   ctx->Unpack.RowLength = MAX_CONVOLUTION_WIDTH;
+   ctx->Unpack.SkipPixels = 0;
+   ctx->Unpack.SkipRows = 0;
+   ctx->Unpack.ImageHeight = 0;
+   ctx->Unpack.SkipImages = 0;
+   ctx->Unpack.SwapBytes = GL_FALSE;
+   ctx->Unpack.LsbFirst = GL_FALSE;
+   ctx->NewState |= _NEW_PACKUNPACK;
+
+   glConvolutionFilter2D(target, internalFormat, width, height,
+			 GL_RGBA, CHAN_TYPE, rgba);
+
+   ctx->Unpack = packSave;  /* restore pixel packing params */
+   ctx->NewState |= _NEW_PACKUNPACK; 
+}