Imported nx-X11-3.1.0-1.tar.gznx-X11/3.1.0-1

Summary: Imported nx-X11-3.1.0-1.tar.gz
Keywords:

Imported nx-X11-3.1.0-1.tar.gz
into Git repository

1 files changed, 1527 insertions, 0 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/main/convolve.c b/nx-X11/extras/Mesa/src/mesa/main/convolve.c
new file mode 100644
index 000000000..6b97c7f56
--- /dev/null
+++ b/nx-X11/extras/Mesa/src/mesa/main/convolve.c
@@ -0,0 +1,1527 @@
+/*
+ * Mesa 3-D graphics library
+ * Version:  6.3
+ *
+ * Copyright (C) 1999-2004  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.
+ */
+
+
+/*
+ * Image convolution functions.
+ *
+ * Notes: filter kernel elements are indexed by <n> and <m> as in
+ * the GL spec.
+ */
+
+
+#include "glheader.h"
+#include "bufferobj.h"
+#include "colormac.h"
+#include "convolve.h"
+#include "context.h"
+#include "image.h"
+#include "mtypes.h"
+#include "pixel.h"
+#include "state.h"
+
+
+/*
+ * Given an internalFormat token passed to glConvolutionFilter
+ * or glSeparableFilter, return the corresponding base format.
+ * Return -1 if invalid token.
+ */
+static GLint
+base_filter_format( GLenum format )
+{
+   switch (format) {
+      case GL_ALPHA:
+      case GL_ALPHA4:
+      case GL_ALPHA8:
+      case GL_ALPHA12:
+      case GL_ALPHA16:
+         return GL_ALPHA;
+      case GL_LUMINANCE:
+      case GL_LUMINANCE4:
+      case GL_LUMINANCE8:
+      case GL_LUMINANCE12:
+      case GL_LUMINANCE16:
+         return GL_LUMINANCE;
+      case GL_LUMINANCE_ALPHA:
+      case GL_LUMINANCE4_ALPHA4:
+      case GL_LUMINANCE6_ALPHA2:
+      case GL_LUMINANCE8_ALPHA8:
+      case GL_LUMINANCE12_ALPHA4:
+      case GL_LUMINANCE12_ALPHA12:
+      case GL_LUMINANCE16_ALPHA16:
+         return GL_LUMINANCE_ALPHA;
+      case GL_INTENSITY:
+      case GL_INTENSITY4:
+      case GL_INTENSITY8:
+      case GL_INTENSITY12:
+      case GL_INTENSITY16:
+         return GL_INTENSITY;
+      case GL_RGB:
+      case GL_R3_G3_B2:
+      case GL_RGB4:
+      case GL_RGB5:
+      case GL_RGB8:
+      case GL_RGB10:
+      case GL_RGB12:
+      case GL_RGB16:
+         return GL_RGB;
+      case 4:
+      case GL_RGBA:
+      case GL_RGBA2:
+      case GL_RGBA4:
+      case GL_RGB5_A1:
+      case GL_RGBA8:
+      case GL_RGB10_A2:
+      case GL_RGBA12:
+      case GL_RGBA16:
+         return GL_RGBA;
+      default:
+         return -1;  /* error */
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionFilter1D(GLenum target, GLenum internalFormat, GLsizei width, GLenum format, GLenum type, const GLvoid *image)
+{
+   GLint baseFormat;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (target != GL_CONVOLUTION_1D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(target)");
+      return;
+   }
+
+   baseFormat = base_filter_format(internalFormat);
+   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(internalFormat)");
+      return;
+   }
+
+   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter1D(width)");
+      return;
+   }
+
+   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glConvolutionFilter1D(format or type)");
+      return;
+   }
+
+   if (format == GL_COLOR_INDEX ||
+       format == GL_STENCIL_INDEX ||
+       format == GL_DEPTH_COMPONENT ||
+       format == GL_INTENSITY ||
+       type == GL_BITMAP) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter1D(format or type)");
+      return;
+   }
+
+   ctx->Convolution1D.Format = format;
+   ctx->Convolution1D.InternalFormat = internalFormat;
+   ctx->Convolution1D.Width = width;
+   ctx->Convolution1D.Height = 1;
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack filter from PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(1, &ctx->Unpack, width, 1, 1,
+                                     format, type, image)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glConvolutionFilter1D(invalid PBO access)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glConvolutionFilter1D(PBO is mapped)");
+         return;
+      }
+      image = ADD_POINTERS(buf, image);
+   }
+   else if (!image) {
+      return;
+   }
+
+   _mesa_unpack_color_span_float(ctx, width, GL_RGBA,
+                                 ctx->Convolution1D.Filter,
+                                 format, type, image, &ctx->Unpack,
+                                 0); /* transferOps */
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+
+   _mesa_scale_and_bias_rgba(width,
+                             (GLfloat (*)[4]) ctx->Convolution1D.Filter,
+                             ctx->Pixel.ConvolutionFilterScale[0][0],
+                             ctx->Pixel.ConvolutionFilterScale[0][1],
+                             ctx->Pixel.ConvolutionFilterScale[0][2],
+                             ctx->Pixel.ConvolutionFilterScale[0][3],
+                             ctx->Pixel.ConvolutionFilterBias[0][0],
+                             ctx->Pixel.ConvolutionFilterBias[0][1],
+                             ctx->Pixel.ConvolutionFilterBias[0][2],
+                             ctx->Pixel.ConvolutionFilterBias[0][3]);
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionFilter2D(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *image)
+{
+   GLint baseFormat;
+   GLint i;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (target != GL_CONVOLUTION_2D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(target)");
+      return;
+   }
+
+   baseFormat = base_filter_format(internalFormat);
+   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(internalFormat)");
+      return;
+   }
+
+   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter2D(width)");
+      return;
+   }
+   if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glConvolutionFilter2D(height)");
+      return;
+   }
+
+   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glConvolutionFilter2D(format or type)");
+      return;
+   }
+   if (format == GL_COLOR_INDEX ||
+       format == GL_STENCIL_INDEX ||
+       format == GL_DEPTH_COMPONENT ||
+       format == GL_INTENSITY ||
+       type == GL_BITMAP) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionFilter2D(format or type)");
+      return;
+   }
+
+   /* this should have been caught earlier */
+   assert(_mesa_components_in_format(format));
+
+   ctx->Convolution2D.Format = format;
+   ctx->Convolution2D.InternalFormat = internalFormat;
+   ctx->Convolution2D.Width = width;
+   ctx->Convolution2D.Height = height;
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack filter from PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(2, &ctx->Unpack, width, height, 1,
+                                     format, type, image)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glConvolutionFilter2D(invalid PBO access)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glConvolutionFilter2D(PBO is mapped)");
+         return;
+      }
+      image = ADD_POINTERS(buf, image);
+   }
+   else if (!image) {
+      return;
+   }
+
+   /* Unpack filter image.  We always store filters in RGBA format. */
+   for (i = 0; i < height; i++) {
+      const GLvoid *src = _mesa_image_address2d(&ctx->Unpack, image, width,
+                                                height, format, type, i, 0);
+      GLfloat *dst = ctx->Convolution2D.Filter + i * width * 4;
+      _mesa_unpack_color_span_float(ctx, width, GL_RGBA, dst,
+                                    format, type, src, &ctx->Unpack,
+                                    0); /* transferOps */
+   }
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+
+   _mesa_scale_and_bias_rgba(width * height,
+                             (GLfloat (*)[4]) ctx->Convolution2D.Filter,
+                             ctx->Pixel.ConvolutionFilterScale[1][0],
+                             ctx->Pixel.ConvolutionFilterScale[1][1],
+                             ctx->Pixel.ConvolutionFilterScale[1][2],
+                             ctx->Pixel.ConvolutionFilterScale[1][3],
+                             ctx->Pixel.ConvolutionFilterBias[1][0],
+                             ctx->Pixel.ConvolutionFilterBias[1][1],
+                             ctx->Pixel.ConvolutionFilterBias[1][2],
+                             ctx->Pixel.ConvolutionFilterBias[1][3]);
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionParameterf(GLenum target, GLenum pname, GLfloat param)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_MODE:
+         if (param == (GLfloat) GL_REDUCE ||
+             param == (GLfloat) GL_CONSTANT_BORDER ||
+             param == (GLfloat) GL_REPLICATE_BORDER) {
+            ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) param;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(params)");
+            return;
+         }
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterf(pname)");
+         return;
+   }
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionParameterfv(GLenum target, GLenum pname, const GLfloat *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_COLOR:
+         COPY_4V(ctx->Pixel.ConvolutionBorderColor[c], params);
+         break;
+      case GL_CONVOLUTION_BORDER_MODE:
+         if (params[0] == (GLfloat) GL_REDUCE ||
+             params[0] == (GLfloat) GL_CONSTANT_BORDER ||
+             params[0] == (GLfloat) GL_REPLICATE_BORDER) {
+            ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) params[0];
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(params)");
+            return;
+         }
+         break;
+      case GL_CONVOLUTION_FILTER_SCALE:
+         COPY_4V(ctx->Pixel.ConvolutionFilterScale[c], params);
+         break;
+      case GL_CONVOLUTION_FILTER_BIAS:
+         COPY_4V(ctx->Pixel.ConvolutionFilterBias[c], params);
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameterfv(pname)");
+         return;
+   }
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionParameteri(GLenum target, GLenum pname, GLint param)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_MODE:
+         if (param == (GLint) GL_REDUCE ||
+             param == (GLint) GL_CONSTANT_BORDER ||
+             param == (GLint) GL_REPLICATE_BORDER) {
+            ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) param;
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(params)");
+            return;
+         }
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteri(pname)");
+         return;
+   }
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_ConvolutionParameteriv(GLenum target, GLenum pname, const GLint *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_COLOR:
+	 ctx->Pixel.ConvolutionBorderColor[c][0] = INT_TO_FLOAT(params[0]);
+	 ctx->Pixel.ConvolutionBorderColor[c][1] = INT_TO_FLOAT(params[1]);
+	 ctx->Pixel.ConvolutionBorderColor[c][2] = INT_TO_FLOAT(params[2]);
+	 ctx->Pixel.ConvolutionBorderColor[c][3] = INT_TO_FLOAT(params[3]);
+         break;
+      case GL_CONVOLUTION_BORDER_MODE:
+         if (params[0] == (GLint) GL_REDUCE ||
+             params[0] == (GLint) GL_CONSTANT_BORDER ||
+             params[0] == (GLint) GL_REPLICATE_BORDER) {
+            ctx->Pixel.ConvolutionBorderMode[c] = (GLenum) params[0];
+         }
+         else {
+            _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(params)");
+            return;
+         }
+         break;
+      case GL_CONVOLUTION_FILTER_SCALE:
+	 /* COPY_4V(ctx->Pixel.ConvolutionFilterScale[c], params); */
+	 /* need cast to prevent compiler warnings */  
+	 ctx->Pixel.ConvolutionFilterScale[c][0] = (GLfloat) params[0]; 
+	 ctx->Pixel.ConvolutionFilterScale[c][1] = (GLfloat) params[1]; 
+	 ctx->Pixel.ConvolutionFilterScale[c][2] = (GLfloat) params[2]; 
+	 ctx->Pixel.ConvolutionFilterScale[c][3] = (GLfloat) params[3]; 
+         break;
+      case GL_CONVOLUTION_FILTER_BIAS:
+	 /* COPY_4V(ctx->Pixel.ConvolutionFilterBias[c], params); */
+	 /* need cast to prevent compiler warnings */  
+	 ctx->Pixel.ConvolutionFilterBias[c][0] = (GLfloat) params[0]; 
+	 ctx->Pixel.ConvolutionFilterBias[c][1] = (GLfloat) params[1]; 
+	 ctx->Pixel.ConvolutionFilterBias[c][2] = (GLfloat) params[2]; 
+	 ctx->Pixel.ConvolutionFilterBias[c][3] = (GLfloat) params[3]; 
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glConvolutionParameteriv(pname)");
+         return;
+   }
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+void GLAPIENTRY
+_mesa_CopyConvolutionFilter1D(GLenum target, GLenum internalFormat, GLint x, GLint y, GLsizei width)
+{
+   GLint baseFormat;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (target != GL_CONVOLUTION_1D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter1D(target)");
+      return;
+   }
+
+   baseFormat = base_filter_format(internalFormat);
+   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter1D(internalFormat)");
+      return;
+   }
+
+   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter1D(width)");
+      return;
+   }
+
+   ctx->Driver.CopyConvolutionFilter1D( ctx, target, 
+					internalFormat, x, y, width);
+}
+
+
+void GLAPIENTRY
+_mesa_CopyConvolutionFilter2D(GLenum target, GLenum internalFormat, GLint x, GLint y, GLsizei width, GLsizei height)
+{
+   GLint baseFormat;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (target != GL_CONVOLUTION_2D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(target)");
+      return;
+   }
+
+   baseFormat = base_filter_format(internalFormat);
+   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glCopyConvolutionFilter2D(internalFormat)");
+      return;
+   }
+
+   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(width)");
+      return;
+   }
+   if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glCopyConvolutionFilter2D(height)");
+      return;
+   }
+
+   ctx->Driver.CopyConvolutionFilter2D( ctx, target, internalFormat, x, y, 
+					width, height );
+}
+
+
+void GLAPIENTRY
+_mesa_GetConvolutionFilter(GLenum target, GLenum format, GLenum type, GLvoid *image)
+{
+   const struct gl_convolution_attrib *filter;
+   GLuint row;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (ctx->NewState) {
+      _mesa_update_state(ctx);
+   }
+
+   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetConvolutionFilter(format or type)");
+      return;
+   }
+
+   if (format == GL_COLOR_INDEX ||
+       format == GL_STENCIL_INDEX ||
+       format == GL_DEPTH_COMPONENT ||
+       format == GL_INTENSITY ||
+       type == GL_BITMAP) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(format or type)");
+      return;
+   }
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         filter = &(ctx->Convolution1D);
+         break;
+      case GL_CONVOLUTION_2D:
+         filter = &(ctx->Convolution2D);
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(target)");
+         return;
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* Pack the filter into a PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(2, &ctx->Pack,
+                                     filter->Width, filter->Height,
+                                     1, format, type, image)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetConvolutionFilter(invalid PBO access)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetConvolutionFilter(PBO is mapped)");
+         return;
+      }
+      image = ADD_POINTERS(image, buf);
+   }
+
+   for (row = 0; row < filter->Height; row++) {
+      GLvoid *dst = _mesa_image_address2d(&ctx->Pack, image, filter->Width,
+                                          filter->Height, format, type,
+                                          row, 0);
+      const GLfloat *src = filter->Filter + row * filter->Width * 4;
+      _mesa_pack_rgba_span_float(ctx, filter->Width,
+                                 (const GLfloat (*)[4]) src,
+                                 format, type, dst, &ctx->Pack, 0);
+   }
+
+   if (ctx->Pack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                              ctx->Pack.BufferObj);
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetConvolutionParameterfv(GLenum target, GLenum pname, GLfloat *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_convolution_attrib *conv;
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         conv = &ctx->Convolution1D;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         conv = &ctx->Convolution2D;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         conv = &ctx->Separable2D;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameterfv(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_COLOR:
+         COPY_4V(params, ctx->Pixel.ConvolutionBorderColor[c]);
+         break;
+      case GL_CONVOLUTION_BORDER_MODE:
+         *params = (GLfloat) ctx->Pixel.ConvolutionBorderMode[c];
+         break;
+      case GL_CONVOLUTION_FILTER_SCALE:
+         COPY_4V(params, ctx->Pixel.ConvolutionFilterScale[c]);
+         break;
+      case GL_CONVOLUTION_FILTER_BIAS:
+         COPY_4V(params, ctx->Pixel.ConvolutionFilterBias[c]);
+         break;
+      case GL_CONVOLUTION_FORMAT:
+         *params = (GLfloat) conv->Format;
+         break;
+      case GL_CONVOLUTION_WIDTH:
+         *params = (GLfloat) conv->Width;
+         break;
+      case GL_CONVOLUTION_HEIGHT:
+         *params = (GLfloat) conv->Height;
+         break;
+      case GL_MAX_CONVOLUTION_WIDTH:
+         *params = (GLfloat) ctx->Const.MaxConvolutionWidth;
+         break;
+      case GL_MAX_CONVOLUTION_HEIGHT:
+         *params = (GLfloat) ctx->Const.MaxConvolutionHeight;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameterfv(pname)");
+         return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetConvolutionParameteriv(GLenum target, GLenum pname, GLint *params)
+{
+   GET_CURRENT_CONTEXT(ctx);
+   const struct gl_convolution_attrib *conv;
+   GLuint c;
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   switch (target) {
+      case GL_CONVOLUTION_1D:
+         c = 0;
+         conv = &ctx->Convolution1D;
+         break;
+      case GL_CONVOLUTION_2D:
+         c = 1;
+         conv = &ctx->Convolution2D;
+         break;
+      case GL_SEPARABLE_2D:
+         c = 2;
+         conv = &ctx->Separable2D;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameteriv(target)");
+         return;
+   }
+
+   switch (pname) {
+      case GL_CONVOLUTION_BORDER_COLOR:
+         params[0] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][0]);
+         params[1] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][1]);
+         params[2] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][2]);
+         params[3] = FLOAT_TO_INT(ctx->Pixel.ConvolutionBorderColor[c][3]);
+         break;
+      case GL_CONVOLUTION_BORDER_MODE:
+         *params = (GLint) ctx->Pixel.ConvolutionBorderMode[c];
+         break;
+      case GL_CONVOLUTION_FILTER_SCALE:
+         params[0] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][0];
+         params[1] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][1];
+         params[2] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][2];
+         params[3] = (GLint) ctx->Pixel.ConvolutionFilterScale[c][3];
+         break;
+      case GL_CONVOLUTION_FILTER_BIAS:
+         params[0] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][0];
+         params[1] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][1];
+         params[2] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][2];
+         params[3] = (GLint) ctx->Pixel.ConvolutionFilterBias[c][3];
+         break;
+      case GL_CONVOLUTION_FORMAT:
+         *params = (GLint) conv->Format;
+         break;
+      case GL_CONVOLUTION_WIDTH:
+         *params = (GLint) conv->Width;
+         break;
+      case GL_CONVOLUTION_HEIGHT:
+         *params = (GLint) conv->Height;
+         break;
+      case GL_MAX_CONVOLUTION_WIDTH:
+         *params = (GLint) ctx->Const.MaxConvolutionWidth;
+         break;
+      case GL_MAX_CONVOLUTION_HEIGHT:
+         *params = (GLint) ctx->Const.MaxConvolutionHeight;
+         break;
+      default:
+         _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionParameteriv(pname)");
+         return;
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_GetSeparableFilter(GLenum target, GLenum format, GLenum type, GLvoid *row, GLvoid *column, GLvoid *span)
+{
+   const GLint colStart = MAX_CONVOLUTION_WIDTH * 4;
+   const struct gl_convolution_attrib *filter;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END(ctx);
+
+   if (ctx->NewState) {
+      _mesa_update_state(ctx);
+   }
+
+   if (target != GL_SEPARABLE_2D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetSeparableFilter(target)");
+      return;
+   }
+
+   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glGetConvolutionFilter(format or type)");
+      return;
+   }
+
+   if (format == GL_COLOR_INDEX ||
+       format == GL_STENCIL_INDEX ||
+       format == GL_DEPTH_COMPONENT ||
+       format == GL_INTENSITY ||
+       type == GL_BITMAP) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glGetConvolutionFilter(format or type)");
+      return;
+   }
+
+   filter = &ctx->Separable2D;
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* Pack filter into PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(1, &ctx->Pack, filter->Width, 1, 1,
+                                     format, type, row)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetSeparableFilter(invalid PBO access, width)");
+         return;
+      }
+      if (!_mesa_validate_pbo_access(1, &ctx->Pack, filter->Height, 1, 1,
+                                     format, type, column)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetSeparableFilter(invalid PBO access, height)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_PACK_BUFFER_EXT,
+                                              GL_WRITE_ONLY_ARB,
+                                              ctx->Pack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glGetSeparableFilter(PBO is mapped)");
+         return;
+      }
+      row = ADD_POINTERS(buf, row);
+      column = ADD_POINTERS(buf, column);
+   }
+
+   /* Row filter */
+   if (row) {
+      GLvoid *dst = _mesa_image_address1d(&ctx->Pack, row, filter->Width,
+                                          format, type, 0);
+      _mesa_pack_rgba_span_float(ctx, filter->Width,
+                                 (const GLfloat (*)[4]) filter->Filter,
+                                 format, type, dst, &ctx->Pack, 0);
+   }
+
+   /* Column filter */
+   if (column) {
+      GLvoid *dst = _mesa_image_address1d(&ctx->Pack, column, filter->Height,
+                                          format, type, 0);
+      const GLfloat *src = filter->Filter + colStart;
+      _mesa_pack_rgba_span_float(ctx, filter->Height,
+                                 (const GLfloat (*)[4]) src,
+                                 format, type, dst, &ctx->Pack, 0);
+   }
+
+   (void) span;  /* unused at this time */
+
+   if (ctx->Pack.BufferObj->Name) {
+      /* Pack filter into PBO */
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+}
+
+
+void GLAPIENTRY
+_mesa_SeparableFilter2D(GLenum target, GLenum internalFormat, GLsizei width, GLsizei height, GLenum format, GLenum type, const GLvoid *row, const GLvoid *column)
+{
+   const GLint colStart = MAX_CONVOLUTION_WIDTH * 4;
+   GLint baseFormat;
+   GET_CURRENT_CONTEXT(ctx);
+   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);
+
+   if (target != GL_SEPARABLE_2D) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(target)");
+      return;
+   }
+
+   baseFormat = base_filter_format(internalFormat);
+   if (baseFormat < 0 || baseFormat == GL_COLOR_INDEX) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(internalFormat)");
+      return;
+   }
+
+   if (width < 0 || width > MAX_CONVOLUTION_WIDTH) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glSeparableFilter2D(width)");
+      return;
+   }
+   if (height < 0 || height > MAX_CONVOLUTION_HEIGHT) {
+      _mesa_error(ctx, GL_INVALID_VALUE, "glSeparableFilter2D(height)");
+      return;
+   }
+
+   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
+      _mesa_error(ctx, GL_INVALID_OPERATION, "glSeparableFilter2D(format or type)");
+      return;
+   }
+
+   if (format == GL_COLOR_INDEX ||
+       format == GL_STENCIL_INDEX ||
+       format == GL_DEPTH_COMPONENT ||
+       format == GL_INTENSITY ||
+       type == GL_BITMAP) {
+      _mesa_error(ctx, GL_INVALID_ENUM, "glSeparableFilter2D(format or type)");
+      return;
+   }
+
+   ctx->Separable2D.Format = format;
+   ctx->Separable2D.InternalFormat = internalFormat;
+   ctx->Separable2D.Width = width;
+   ctx->Separable2D.Height = height;
+
+   if (ctx->Unpack.BufferObj->Name) {
+      /* unpack filter from PBO */
+      GLubyte *buf;
+      if (!_mesa_validate_pbo_access(1, &ctx->Unpack, width, 1, 1,
+                                     format, type, row)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glSeparableFilter2D(invalid PBO access, width)");
+         return;
+      }
+      if (!_mesa_validate_pbo_access(1, &ctx->Unpack, height, 1, 1,
+                                     format, type, column)) {
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glSeparableFilter2D(invalid PBO access, height)");
+         return;
+      }
+      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                                              GL_READ_ONLY_ARB,
+                                              ctx->Unpack.BufferObj);
+      if (!buf) {
+         /* buffer is already mapped - that's an error */
+         _mesa_error(ctx, GL_INVALID_OPERATION,
+                     "glSeparableFilter2D(PBO is mapped)");
+         return;
+      }
+      row = ADD_POINTERS(buf, row);
+      column = ADD_POINTERS(buf, column);
+   }
+
+   /* unpack row filter */
+   if (row) {
+      _mesa_unpack_color_span_float(ctx, width, GL_RGBA,
+                                    ctx->Separable2D.Filter,
+                                    format, type, row, &ctx->Unpack,
+                                    0);  /* transferOps */
+
+      _mesa_scale_and_bias_rgba(width,
+                             (GLfloat (*)[4]) ctx->Separable2D.Filter,
+                             ctx->Pixel.ConvolutionFilterScale[2][0],
+                             ctx->Pixel.ConvolutionFilterScale[2][1],
+                             ctx->Pixel.ConvolutionFilterScale[2][2],
+                             ctx->Pixel.ConvolutionFilterScale[2][3],
+                             ctx->Pixel.ConvolutionFilterBias[2][0],
+                             ctx->Pixel.ConvolutionFilterBias[2][1],
+                             ctx->Pixel.ConvolutionFilterBias[2][2],
+                             ctx->Pixel.ConvolutionFilterBias[2][3]);
+   }
+
+   /* unpack column filter */
+   if (column) {
+      _mesa_unpack_color_span_float(ctx, height, GL_RGBA,
+                                    &ctx->Separable2D.Filter[colStart],
+                                    format, type, column, &ctx->Unpack,
+                                    0); /* transferOps */
+
+      _mesa_scale_and_bias_rgba(height,
+                       (GLfloat (*)[4]) (ctx->Separable2D.Filter + colStart),
+                       ctx->Pixel.ConvolutionFilterScale[2][0],
+                       ctx->Pixel.ConvolutionFilterScale[2][1],
+                       ctx->Pixel.ConvolutionFilterScale[2][2],
+                       ctx->Pixel.ConvolutionFilterScale[2][3],
+                       ctx->Pixel.ConvolutionFilterBias[2][0],
+                       ctx->Pixel.ConvolutionFilterBias[2][1],
+                       ctx->Pixel.ConvolutionFilterBias[2][2],
+                       ctx->Pixel.ConvolutionFilterBias[2][3]);
+   }
+
+   if (ctx->Unpack.BufferObj->Name) {
+      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
+                              ctx->Unpack.BufferObj);
+   }
+
+   ctx->NewState |= _NEW_PIXEL;
+}
+
+
+/**********************************************************************/
+/***                   image convolution functions                  ***/
+/**********************************************************************/
+
+static void
+convolve_1d_reduce(GLint srcWidth, const GLfloat src[][4],
+                   GLint filterWidth, const GLfloat filter[][4],
+                   GLfloat dest[][4])
+{
+   GLint dstWidth;
+   GLint i, n;
+
+   if (filterWidth >= 1)
+      dstWidth = srcWidth - (filterWidth - 1);
+   else
+      dstWidth = srcWidth;
+
+   if (dstWidth <= 0)
+      return;  /* null result */
+
+   for (i = 0; i < dstWidth; i++) {
+      GLfloat sumR = 0.0;
+      GLfloat sumG = 0.0;
+      GLfloat sumB = 0.0;
+      GLfloat sumA = 0.0;
+      for (n = 0; n < filterWidth; n++) {
+         sumR += src[i + n][RCOMP] * filter[n][RCOMP];
+         sumG += src[i + n][GCOMP] * filter[n][GCOMP];
+         sumB += src[i + n][BCOMP] * filter[n][BCOMP];
+         sumA += src[i + n][ACOMP] * filter[n][ACOMP];
+      }
+      dest[i][RCOMP] = sumR;
+      dest[i][GCOMP] = sumG;
+      dest[i][BCOMP] = sumB;
+      dest[i][ACOMP] = sumA;
+   }
+}
+
+
+static void
+convolve_1d_constant(GLint srcWidth, const GLfloat src[][4],
+                     GLint filterWidth, const GLfloat filter[][4],
+                     GLfloat dest[][4],
+                     const GLfloat borderColor[4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   GLint i, n;
+
+   for (i = 0; i < srcWidth; i++) {
+      GLfloat sumR = 0.0;
+      GLfloat sumG = 0.0;
+      GLfloat sumB = 0.0;
+      GLfloat sumA = 0.0;
+      for (n = 0; n < filterWidth; n++) {
+         if (i + n < halfFilterWidth || i + n - halfFilterWidth >= srcWidth) {
+            sumR += borderColor[RCOMP] * filter[n][RCOMP];
+            sumG += borderColor[GCOMP] * filter[n][GCOMP];
+            sumB += borderColor[BCOMP] * filter[n][BCOMP];
+            sumA += borderColor[ACOMP] * filter[n][ACOMP];
+         }
+         else {
+            sumR += src[i + n - halfFilterWidth][RCOMP] * filter[n][RCOMP];
+            sumG += src[i + n - halfFilterWidth][GCOMP] * filter[n][GCOMP];
+            sumB += src[i + n - halfFilterWidth][BCOMP] * filter[n][BCOMP];
+            sumA += src[i + n - halfFilterWidth][ACOMP] * filter[n][ACOMP];
+         }
+      }
+      dest[i][RCOMP] = sumR;
+      dest[i][GCOMP] = sumG;
+      dest[i][BCOMP] = sumB;
+      dest[i][ACOMP] = sumA;
+   }
+}
+
+
+static void
+convolve_1d_replicate(GLint srcWidth, const GLfloat src[][4],
+                      GLint filterWidth, const GLfloat filter[][4],
+                      GLfloat dest[][4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   GLint i, n;
+
+   for (i = 0; i < srcWidth; i++) {
+      GLfloat sumR = 0.0;
+      GLfloat sumG = 0.0;
+      GLfloat sumB = 0.0;
+      GLfloat sumA = 0.0;
+      for (n = 0; n < filterWidth; n++) {
+         if (i + n < halfFilterWidth) {
+            sumR += src[0][RCOMP] * filter[n][RCOMP];
+            sumG += src[0][GCOMP] * filter[n][GCOMP];
+            sumB += src[0][BCOMP] * filter[n][BCOMP];
+            sumA += src[0][ACOMP] * filter[n][ACOMP];
+         }
+         else if (i + n - halfFilterWidth >= srcWidth) {
+            sumR += src[srcWidth - 1][RCOMP] * filter[n][RCOMP];
+            sumG += src[srcWidth - 1][GCOMP] * filter[n][GCOMP];
+            sumB += src[srcWidth - 1][BCOMP] * filter[n][BCOMP];
+            sumA += src[srcWidth - 1][ACOMP] * filter[n][ACOMP];
+         }
+         else {
+            sumR += src[i + n - halfFilterWidth][RCOMP] * filter[n][RCOMP];
+            sumG += src[i + n - halfFilterWidth][GCOMP] * filter[n][GCOMP];
+            sumB += src[i + n - halfFilterWidth][BCOMP] * filter[n][BCOMP];
+            sumA += src[i + n - halfFilterWidth][ACOMP] * filter[n][ACOMP];
+         }
+      }
+      dest[i][RCOMP] = sumR;
+      dest[i][GCOMP] = sumG;
+      dest[i][BCOMP] = sumB;
+      dest[i][ACOMP] = sumA;
+   }
+}
+
+
+static void
+convolve_2d_reduce(GLint srcWidth, GLint srcHeight,
+                   const GLfloat src[][4],
+                   GLint filterWidth, GLint filterHeight,
+                   const GLfloat filter[][4],
+                   GLfloat dest[][4])
+{
+   GLint dstWidth, dstHeight;
+   GLint i, j, n, m;
+
+   if (filterWidth >= 1)
+      dstWidth = srcWidth - (filterWidth - 1);
+   else
+      dstWidth = srcWidth;
+
+   if (filterHeight >= 1)
+      dstHeight = srcHeight - (filterHeight - 1);
+   else
+      dstHeight = srcHeight;
+
+   if (dstWidth <= 0 || dstHeight <= 0)
+      return;
+
+   for (j = 0; j < dstHeight; j++) {
+      for (i = 0; i < dstWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               const GLint k = (j + m) * srcWidth + i + n;
+               const GLint f = m * filterWidth + n;
+               sumR += src[k][RCOMP] * filter[f][RCOMP];
+               sumG += src[k][GCOMP] * filter[f][GCOMP];
+               sumB += src[k][BCOMP] * filter[f][BCOMP];
+               sumA += src[k][ACOMP] * filter[f][ACOMP];
+            }
+         }
+         dest[j * dstWidth + i][RCOMP] = sumR;
+         dest[j * dstWidth + i][GCOMP] = sumG;
+         dest[j * dstWidth + i][BCOMP] = sumB;
+         dest[j * dstWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+static void
+convolve_2d_constant(GLint srcWidth, GLint srcHeight,
+                     const GLfloat src[][4],
+                     GLint filterWidth, GLint filterHeight,
+                     const GLfloat filter[][4],
+                     GLfloat dest[][4],
+                     const GLfloat borderColor[4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   const GLint halfFilterHeight = filterHeight / 2;
+   GLint i, j, n, m;
+
+   for (j = 0; j < srcHeight; j++) {
+      for (i = 0; i < srcWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               const GLint f = m * filterWidth + n;
+               const GLint is = i + n - halfFilterWidth;
+               const GLint js = j + m - halfFilterHeight;
+               if (is < 0 || is >= srcWidth ||
+                   js < 0 || js >= srcHeight) {
+                  sumR += borderColor[RCOMP] * filter[f][RCOMP];
+                  sumG += borderColor[GCOMP] * filter[f][GCOMP];
+                  sumB += borderColor[BCOMP] * filter[f][BCOMP];
+                  sumA += borderColor[ACOMP] * filter[f][ACOMP];
+               }
+               else {
+                  const GLint k = js * srcWidth + is;
+                  sumR += src[k][RCOMP] * filter[f][RCOMP];
+                  sumG += src[k][GCOMP] * filter[f][GCOMP];
+                  sumB += src[k][BCOMP] * filter[f][BCOMP];
+                  sumA += src[k][ACOMP] * filter[f][ACOMP];
+               }
+            }
+         }
+         dest[j * srcWidth + i][RCOMP] = sumR;
+         dest[j * srcWidth + i][GCOMP] = sumG;
+         dest[j * srcWidth + i][BCOMP] = sumB;
+         dest[j * srcWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+static void
+convolve_2d_replicate(GLint srcWidth, GLint srcHeight,
+                      const GLfloat src[][4],
+                      GLint filterWidth, GLint filterHeight,
+                      const GLfloat filter[][4],
+                      GLfloat dest[][4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   const GLint halfFilterHeight = filterHeight / 2;
+   GLint i, j, n, m;
+
+   for (j = 0; j < srcHeight; j++) {
+      for (i = 0; i < srcWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               const GLint f = m * filterWidth + n;
+               GLint is = i + n - halfFilterWidth;
+               GLint js = j + m - halfFilterHeight;
+               GLint k;
+               if (is < 0)
+                  is = 0;
+               else if (is >= srcWidth)
+                  is = srcWidth - 1;
+               if (js < 0)
+                  js = 0;
+               else if (js >= srcHeight)
+                  js = srcHeight - 1;
+               k = js * srcWidth + is;
+               sumR += src[k][RCOMP] * filter[f][RCOMP];
+               sumG += src[k][GCOMP] * filter[f][GCOMP];
+               sumB += src[k][BCOMP] * filter[f][BCOMP];
+               sumA += src[k][ACOMP] * filter[f][ACOMP];
+            }
+         }
+         dest[j * srcWidth + i][RCOMP] = sumR;
+         dest[j * srcWidth + i][GCOMP] = sumG;
+         dest[j * srcWidth + i][BCOMP] = sumB;
+         dest[j * srcWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+static void
+convolve_sep_reduce(GLint srcWidth, GLint srcHeight,
+                    const GLfloat src[][4],
+                    GLint filterWidth, GLint filterHeight,
+                    const GLfloat rowFilt[][4],
+                    const GLfloat colFilt[][4],
+                    GLfloat dest[][4])
+{
+   GLint dstWidth, dstHeight;
+   GLint i, j, n, m;
+
+   if (filterWidth >= 1)
+      dstWidth = srcWidth - (filterWidth - 1);
+   else
+      dstWidth = srcWidth;
+
+   if (filterHeight >= 1)
+      dstHeight = srcHeight - (filterHeight - 1);
+   else
+      dstHeight = srcHeight;
+
+   if (dstWidth <= 0 || dstHeight <= 0)
+      return;
+
+   for (j = 0; j < dstHeight; j++) {
+      for (i = 0; i < dstWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               GLint k = (j + m) * srcWidth + i + n;
+               sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP];
+               sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP];
+               sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP];
+               sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP];
+            }
+         }
+         dest[j * dstWidth + i][RCOMP] = sumR;
+         dest[j * dstWidth + i][GCOMP] = sumG;
+         dest[j * dstWidth + i][BCOMP] = sumB;
+         dest[j * dstWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+static void
+convolve_sep_constant(GLint srcWidth, GLint srcHeight,
+                      const GLfloat src[][4],
+                      GLint filterWidth, GLint filterHeight,
+                      const GLfloat rowFilt[][4],
+                      const GLfloat colFilt[][4],
+                      GLfloat dest[][4],
+                      const GLfloat borderColor[4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   const GLint halfFilterHeight = filterHeight / 2;
+   GLint i, j, n, m;
+
+   for (j = 0; j < srcHeight; j++) {
+      for (i = 0; i < srcWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               const GLint is = i + n - halfFilterWidth;
+               const GLint js = j + m - halfFilterHeight;
+               if (is < 0 || is >= srcWidth ||
+                   js < 0 || js >= srcHeight) {
+                  sumR += borderColor[RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP];
+                  sumG += borderColor[GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP];
+                  sumB += borderColor[BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP];
+                  sumA += borderColor[ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP];
+               }
+               else {
+                  GLint k = js * srcWidth + is;
+                  sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP];
+                  sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP];
+                  sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP];
+                  sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP];
+               }
+
+            }
+         }
+         dest[j * srcWidth + i][RCOMP] = sumR;
+         dest[j * srcWidth + i][GCOMP] = sumG;
+         dest[j * srcWidth + i][BCOMP] = sumB;
+         dest[j * srcWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+static void
+convolve_sep_replicate(GLint srcWidth, GLint srcHeight,
+                       const GLfloat src[][4],
+                       GLint filterWidth, GLint filterHeight,
+                       const GLfloat rowFilt[][4],
+                       const GLfloat colFilt[][4],
+                       GLfloat dest[][4])
+{
+   const GLint halfFilterWidth = filterWidth / 2;
+   const GLint halfFilterHeight = filterHeight / 2;
+   GLint i, j, n, m;
+
+   for (j = 0; j < srcHeight; j++) {
+      for (i = 0; i < srcWidth; i++) {
+         GLfloat sumR = 0.0;
+         GLfloat sumG = 0.0;
+         GLfloat sumB = 0.0;
+         GLfloat sumA = 0.0;
+         for (m = 0; m < filterHeight; m++) {
+            for (n = 0; n < filterWidth; n++) {
+               GLint is = i + n - halfFilterWidth;
+               GLint js = j + m - halfFilterHeight;
+               GLint k;
+               if (is < 0)
+                  is = 0;
+               else if (is >= srcWidth)
+                  is = srcWidth - 1;
+               if (js < 0)
+                  js = 0;
+               else if (js >= srcHeight)
+                  js = srcHeight - 1;
+               k = js * srcWidth + is;
+               sumR += src[k][RCOMP] * rowFilt[n][RCOMP] * colFilt[m][RCOMP];
+               sumG += src[k][GCOMP] * rowFilt[n][GCOMP] * colFilt[m][GCOMP];
+               sumB += src[k][BCOMP] * rowFilt[n][BCOMP] * colFilt[m][BCOMP];
+               sumA += src[k][ACOMP] * rowFilt[n][ACOMP] * colFilt[m][ACOMP];
+            }
+         }
+         dest[j * srcWidth + i][RCOMP] = sumR;
+         dest[j * srcWidth + i][GCOMP] = sumG;
+         dest[j * srcWidth + i][BCOMP] = sumB;
+         dest[j * srcWidth + i][ACOMP] = sumA;
+      }
+   }
+}
+
+
+
+void
+_mesa_convolve_1d_image(const GLcontext *ctx, GLsizei *width,
+                        const GLfloat *srcImage, GLfloat *dstImage)
+{
+   switch (ctx->Pixel.ConvolutionBorderMode[0]) {
+      case GL_REDUCE:
+         convolve_1d_reduce(*width, (const GLfloat (*)[4]) srcImage,
+                            ctx->Convolution1D.Width,
+                            (const GLfloat (*)[4]) ctx->Convolution1D.Filter,
+                            (GLfloat (*)[4]) dstImage);
+         *width = *width - (MAX2(ctx->Convolution1D.Width, 1) - 1);
+         break;
+      case GL_CONSTANT_BORDER:
+         convolve_1d_constant(*width, (const GLfloat (*)[4]) srcImage,
+                              ctx->Convolution1D.Width,
+                              (const GLfloat (*)[4]) ctx->Convolution1D.Filter,
+                              (GLfloat (*)[4]) dstImage,
+                              ctx->Pixel.ConvolutionBorderColor[0]);
+         break;
+      case GL_REPLICATE_BORDER:
+         convolve_1d_replicate(*width, (const GLfloat (*)[4]) srcImage,
+                              ctx->Convolution1D.Width,
+                              (const GLfloat (*)[4]) ctx->Convolution1D.Filter,
+                              (GLfloat (*)[4]) dstImage);
+         break;
+      default:
+         ;
+   }
+}
+
+
+void
+_mesa_convolve_2d_image(const GLcontext *ctx, GLsizei *width, GLsizei *height,
+                        const GLfloat *srcImage, GLfloat *dstImage)
+{
+   switch (ctx->Pixel.ConvolutionBorderMode[1]) {
+      case GL_REDUCE:
+         convolve_2d_reduce(*width, *height,
+                            (const GLfloat (*)[4]) srcImage,
+                            ctx->Convolution2D.Width,
+                            ctx->Convolution2D.Height,
+                            (const GLfloat (*)[4]) ctx->Convolution2D.Filter,
+                            (GLfloat (*)[4]) dstImage);
+         *width = *width - (MAX2(ctx->Convolution2D.Width, 1) - 1);
+         *height = *height - (MAX2(ctx->Convolution2D.Height, 1) - 1);
+         break;
+      case GL_CONSTANT_BORDER:
+         convolve_2d_constant(*width, *height,
+                              (const GLfloat (*)[4]) srcImage,
+                              ctx->Convolution2D.Width,
+                              ctx->Convolution2D.Height,
+                              (const GLfloat (*)[4]) ctx->Convolution2D.Filter,
+                              (GLfloat (*)[4]) dstImage,
+                              ctx->Pixel.ConvolutionBorderColor[1]);
+         break;
+      case GL_REPLICATE_BORDER:
+         convolve_2d_replicate(*width, *height,
+                               (const GLfloat (*)[4]) srcImage,
+                               ctx->Convolution2D.Width,
+                               ctx->Convolution2D.Height,
+                               (const GLfloat (*)[4])ctx->Convolution2D.Filter,
+                               (GLfloat (*)[4]) dstImage);
+         break;
+      default:
+         ;
+      }
+}
+
+
+void
+_mesa_convolve_sep_image(const GLcontext *ctx,
+                         GLsizei *width, GLsizei *height,
+                         const GLfloat *srcImage, GLfloat *dstImage)
+{
+   const GLfloat *rowFilter = ctx->Separable2D.Filter;
+   const GLfloat *colFilter = rowFilter + 4 * MAX_CONVOLUTION_WIDTH;
+
+   switch (ctx->Pixel.ConvolutionBorderMode[2]) {
+      case GL_REDUCE:
+         convolve_sep_reduce(*width, *height,
+                             (const GLfloat (*)[4]) srcImage,
+                             ctx->Separable2D.Width,
+                             ctx->Separable2D.Height,
+                             (const GLfloat (*)[4]) rowFilter,
+                             (const GLfloat (*)[4]) colFilter,
+                             (GLfloat (*)[4]) dstImage);
+         *width = *width - (MAX2(ctx->Separable2D.Width, 1) - 1);
+         *height = *height - (MAX2(ctx->Separable2D.Height, 1) - 1);
+         break;
+      case GL_CONSTANT_BORDER:
+         convolve_sep_constant(*width, *height,
+                               (const GLfloat (*)[4]) srcImage,
+                               ctx->Separable2D.Width,
+                               ctx->Separable2D.Height,
+                               (const GLfloat (*)[4]) rowFilter,
+                               (const GLfloat (*)[4]) colFilter,
+                               (GLfloat (*)[4]) dstImage,
+                               ctx->Pixel.ConvolutionBorderColor[2]);
+         break;
+      case GL_REPLICATE_BORDER:
+         convolve_sep_replicate(*width, *height,
+                                (const GLfloat (*)[4]) srcImage,
+                                ctx->Separable2D.Width,
+                                ctx->Separable2D.Height,
+                                (const GLfloat (*)[4]) rowFilter,
+                                (const GLfloat (*)[4]) colFilter,
+                                (GLfloat (*)[4]) dstImage);
+         break;
+      default:
+         ;
+   }
+}
+
+
+
+/*
+ * This function computes an image's size after convolution.
+ * If the convolution border mode is GL_REDUCE, the post-convolution
+ * image will be smaller than the original.
+ */
+void
+_mesa_adjust_image_for_convolution(const GLcontext *ctx, GLuint dimensions,
+                                   GLsizei *width, GLsizei *height)
+{
+   if (ctx->Pixel.Convolution1DEnabled
+       && dimensions == 1
+       && ctx->Pixel.ConvolutionBorderMode[0] == GL_REDUCE) {
+      *width = *width - (MAX2(ctx->Convolution1D.Width, 1) - 1);
+   }
+   else if (ctx->Pixel.Convolution2DEnabled
+            && dimensions > 1
+            && ctx->Pixel.ConvolutionBorderMode[1] == GL_REDUCE) {
+      *width = *width - (MAX2(ctx->Convolution2D.Width, 1) - 1);
+      *height = *height - (MAX2(ctx->Convolution2D.Height, 1) - 1);
+   }
+   else if (ctx->Pixel.Separable2DEnabled
+            && dimensions > 1
+            && ctx->Pixel.ConvolutionBorderMode[2] == GL_REDUCE) {
+      *width = *width - (MAX2(ctx->Separable2D.Width, 1) - 1);
+      *height = *height - (MAX2(ctx->Separable2D.Height, 1) - 1);
+   }
+}