Mesa (master): mesa: Add driver hooks for texture image mapping/unmapping.

[Eric Anholt]

Module: Mesa
Branch: master
Commit: 570016cef27b8b2078d1495fcbce86e3c86c0ee4
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=570016cef27b8b2078d1495fcbce86e3c86c0ee4

Author: Brian Paul <brianp at vmware.com>
Date:   Thu Jul 14 20:57:34 2011 -0600

mesa: Add driver hooks for texture image mapping/unmapping.

ctx->Driver.MapTextureImage() / UnmapTextureImage() will be called by
the glTex[Sub]Image(), glGetTexImage() functions, etc. when we're
accessing texture data, and also for software rendering when accessing
texture data.

Reviewed-by: Brian Paul <brianp at vmware.com>

---

 src/mesa/main/dd.h |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/src/mesa/main/dd.h b/src/mesa/main/dd.h
index 3164ac8..d918b1e 100644
--- a/src/mesa/main/dd.h
+++ b/src/mesa/main/dd.h
@@ -481,6 +481,25 @@ struct dd_function_table {
     */
    void (*FreeTextureImageBuffer)( struct gl_context *ctx, struct gl_texture_image *tImage );
 
+   /** Map a slice of a texture image into user space.
+    * \param texImage  the texture image
+    * \param slice  the 3D image slice or array texture slice
+    * \param x, y, w, h  region of interest
+    * \param mode  bitmask of GL_MAP_READ_BIT, GL_MAP_WRITE_BIT
+    * \param mapOut  returns start of mapping of region of interest
+    * \param rowStrideOut  returns row stride (in bytes)
+    */
+   void (*MapTextureImage)(struct gl_context *ctx,
+			   struct gl_texture_image *texImage,
+			   GLuint slice,
+			   GLuint x, GLuint y, GLuint w, GLuint h,
+			   GLbitfield mode,
+			   GLubyte **mapOut, GLint *rowStrideOut);
+
+   void (*UnmapTextureImage)(struct gl_context *ctx,
+			     struct gl_texture_image *texImage,
+			     GLuint slice);
+
    /** Map texture image data into user space */
    void (*MapTexture)( struct gl_context *ctx, struct gl_texture_object *tObj );
    /** Unmap texture images from user space */