From 3e5a35269b201d25e2a63743d8d4b1b4311b6fb0 Mon Sep 17 00:00:00 2001
From: Brian Paul <brianp@vmware.com>
Date: Sat, 19 Sep 2009 16:32:42 -0600
Subject: [PATCH] mesa: meta functions for glCopyColorTable,
 glCopyConvolutionFilter, etc

---
 src/mesa/drivers/common/meta.c | 122 +++++++++++++++++++++++++++++++++
 src/mesa/drivers/common/meta.h |  19 +++++
 2 files changed, 141 insertions(+)

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index b1465d1fbac..5857feb4b51 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -38,6 +38,7 @@
 #include "main/blend.h"
 #include "main/bufferobj.h"
 #include "main/buffers.h"
+#include "main/colortab.h"
 #include "main/convolve.h"
 #include "main/depth.h"
 #include "main/enable.h"
@@ -2365,3 +2366,124 @@ _mesa_meta_CopyTexSubImage3D(GLcontext *ctx, GLenum target, GLint level,
    copy_tex_sub_image(ctx, 3, target, level, xoffset, yoffset, zoffset,
                       x, y, width, height);
 }
+
+
+void
+_mesa_meta_CopyColorTable(GLcontext *ctx,
+                          GLenum target, GLenum internalformat,
+                          GLint x, GLint y, GLsizei width)
+{
+   GLfloat *buf;
+
+   buf = (GLfloat *) _mesa_malloc(width * 4 * sizeof(GLfloat));
+   if (!buf) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorTable");
+      return;
+   }
+
+   /*
+    * Read image from framebuffer (disable pixel transfer ops)
+    */
+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
+   ctx->Driver.ReadPixels(ctx, x, y, width, 1,
+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
+
+   _mesa_ColorTable(target, internalformat, width, GL_RGBA, GL_FLOAT, buf);
+
+   _mesa_meta_end(ctx);
+
+   _mesa_free(buf);
+}
+
+
+void
+_mesa_meta_CopyColorSubTable(GLcontext *ctx,GLenum target, GLsizei start,
+                             GLint x, GLint y, GLsizei width)
+{
+   GLfloat *buf;
+
+   buf = (GLfloat *) _mesa_malloc(width * 4 * sizeof(GLfloat));
+   if (!buf) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyColorSubTable");
+      return;
+   }
+
+   /*
+    * Read image from framebuffer (disable pixel transfer ops)
+    */
+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
+   ctx->Driver.ReadPixels(ctx, x, y, width, 1,
+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
+
+   _mesa_ColorSubTable(target, start, width, GL_RGBA, GL_FLOAT, buf);
+
+   _mesa_meta_end(ctx);
+
+   _mesa_free(buf);
+}
+
+
+void
+_mesa_meta_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
+                                   GLenum internalFormat,
+                                   GLint x, GLint y, GLsizei width)
+{
+   GLfloat *buf;
+
+   buf = (GLfloat *) _mesa_malloc(width * 4 * sizeof(GLfloat));
+   if (!buf) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyConvolutionFilter2D");
+      return;
+   }
+
+   /*
+    * Read image from framebuffer (disable pixel transfer ops)
+    */
+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
+   _mesa_update_state(ctx);
+   ctx->Driver.ReadPixels(ctx, x, y, width, 1,
+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
+
+   _mesa_ConvolutionFilter1D(target, internalFormat, width,
+                             GL_RGBA, GL_FLOAT, buf);
+
+   _mesa_meta_end(ctx);
+
+   _mesa_free(buf);
+}
+
+
+void
+_mesa_meta_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
+                                   GLenum internalFormat, GLint x, GLint y,
+                                   GLsizei width, GLsizei height)
+{
+   GLfloat *buf;
+
+   if (!ctx->ReadBuffer->_ColorReadBuffer) {
+      /* no readbuffer - OK */
+      return;
+   }
+
+   buf = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
+   if (!buf) {
+      _mesa_error(ctx, GL_OUT_OF_MEMORY, "glCopyConvolutionFilter2D");
+      return;
+   }
+
+   /*
+    * Read image from framebuffer (disable pixel transfer ops)
+    */
+   _mesa_meta_begin(ctx, META_PIXEL_STORE | META_PIXEL_TRANSFER);
+   _mesa_update_state(ctx);
+
+   ctx->Driver.ReadPixels(ctx, x, y, width, height,
+                          GL_RGBA, GL_FLOAT, &ctx->Pack, buf);
+
+   _mesa_ConvolutionFilter2D(target, internalFormat, width, height,
+                             GL_RGBA, GL_FLOAT, buf);
+
+   _mesa_meta_end(ctx);
+
+   _mesa_free(buf);
+}
diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index 9f7100f09c1..c30671741fe 100644
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -91,5 +91,24 @@ _mesa_meta_CopyTexSubImage3D(GLcontext *ctx, GLenum target, GLint level,
                              GLint x, GLint y,
                              GLsizei width, GLsizei height);
 
+extern void
+_mesa_meta_CopyColorTable(GLcontext *ctx,
+                          GLenum target, GLenum internalformat,
+                          GLint x, GLint y, GLsizei width);
+
+extern void
+_mesa_meta_CopyColorSubTable(GLcontext *ctx,GLenum target, GLsizei start,
+                             GLint x, GLint y, GLsizei width);
+
+extern void
+_mesa_meta_CopyConvolutionFilter1D(GLcontext *ctx, GLenum target,
+                                   GLenum internalFormat,
+                                   GLint x, GLint y, GLsizei width);
+
+extern void
+_mesa_meta_CopyConvolutionFilter2D(GLcontext *ctx, GLenum target,
+                                   GLenum internalFormat, GLint x, GLint y,
+                                   GLsizei width, GLsizei height);
+
 
 #endif /* META_H */
-- 
2.30.2