DRI2: Make setTexBuffer take a __DRIdrawable instead of a BO handle.

This fixes a problem where texturing from the same Pixmap more than
once per batchbuffer would hang the DRI driver.  We just use the region
associated with the front left renderbuffer of the __DRIdrawable for
texturing, which avoids creating different regions for the same BO.

This change also make GLX_EXT_texture_from_pixmap work for direct
rendering, since tracking the __DRIdrawable -> BO handle now uses
the standard DRI2 event buffer.  Of course, DRI2 direct rendering
doesn't exist yet.

Finally, this commit bumps the DRI interface version again, accounting
for the change in the DRI_TEX_BUFFER extension and the change in
commit 0bba0e5be7 to pass in the
event buffer head index on drawable creation.

include/GL/internal/dri_interface.h

@@ -216,16 +216,14 @@ struct __DRItexBufferExtensionRec {
     __DRIextension base;
 
     /**
-     * Method to override base texture image with a DRM memory manager
-     * buffer object.  The depth passed in allows e.g. to ignore the
-     * alpha channel of texture images where the non-alpha components
-     * don't occupy a whole texel.
+     * Method to override base texture image with the contents of a
+     * __DRIdrawable. 
      *
      * For GLX_EXT_texture_from_pixmap with AIGLX.
      */
     void (*setTexBuffer)(__DRIcontext *pDRICtx,
-			 GLint target, unsigned long handle,
-			 GLint cpp, GLuint pitch, GLuint height);
+			 GLint target,
+			 __DRIdrawable *pDraw);
 };
 
 
@@ -243,7 +241,7 @@ struct __DRItexBufferExtensionRec {
  */
 /*@{*/
 
-#define __DRI_INTERFACE_VERSION 20080226
+#define __DRI_INTERFACE_VERSION 20080310
 
 typedef void *(CREATENEWSCREENFUNC)(int scr, __DRIscreen *psc,
     const __DRIversion * ddx_version, const __DRIversion * dri_version,

src/mesa/drivers/dri/intel/intel_tex.h

@@ -138,8 +138,7 @@ void intelGetCompressedTexImage(GLcontext *ctx, GLenum target, GLint level,
 void intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
 		       unsigned long long offset, GLint depth, GLuint pitch);
 void intelSetTexBuffer(__DRIcontext *pDRICtx,
-		       GLint target, unsigned long handle,
-		       GLint cpp, GLuint pitch, GLuint height);
+		       GLint target, __DRIdrawable *pDraw);
 
 GLuint intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit);
 

src/mesa/drivers/dri/intel/intel_tex_image.c

@@ -23,6 +23,7 @@
 #include "intel_tex.h"
 #include "intel_ioctl.h"
 #include "intel_blit.h"
+#include "intel_fbo.h"
 
 #define FILE_DEBUG_FLAG DEBUG_TEXTURE
 
@@ -694,26 +695,20 @@ intelSetTexOffset(__DRIcontext *pDRICtx, GLint texname,
 }
 
 void
-intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
-		  unsigned long handle, GLint cpp, GLuint pitch, GLuint height)
+intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target, __DRIdrawable *pDraw)
 {
    __DRIcontextPrivate *driContext = pDRICtx->private;
+   __DRIdrawablePrivate *dPriv = pDraw->private;
+   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
    struct intel_context *intel = driContext->driverPrivate;
    struct intel_texture_object *intelObj;
    struct intel_texture_image *intelImage;
    struct intel_mipmap_tree *mt;
-   struct intel_region *region;
+   struct intel_renderbuffer *rb;
    struct gl_texture_unit *texUnit;
    struct gl_texture_object *texObj;
    struct gl_texture_image *texImage;
-   int level = 0;
-
-   /* FIXME: type, format, internalFormat */
-   int type = GL_BGRA;
-   int format = GL_UNSIGNED_BYTE;
-   int internalFormat = (cpp == 3 ? 3 : 4);
-   cpp = 4;
-   pitch /= 4;
+   int level = 0, type, format, internalFormat;
 
    texUnit = &intel->ctx.Texture.Unit[intel->ctx.Texture.CurrentUnit];
    texObj = _mesa_select_tex_object(&intel->ctx, texUnit, target);
@@ -722,12 +717,16 @@ intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
    if (!intelObj)
       return;
 
-   region = intel_region_alloc_for_handle(intel, cpp, pitch, height,
-					  0, handle);
+   __driParseEvents(driContext, dPriv);
+
+   rb = intel_fb->color_rb[0];
+   type = GL_BGRA;
+   format = GL_UNSIGNED_BYTE;
+   internalFormat = (rb->region->cpp == 3 ? 3 : 4);
 
    mt = intel_miptree_create_for_region(intel, target,
 					internalFormat,
-					0, 0, region, 1, 0);
+					0, 0, rb->region, 1, 0);
    if (mt == NULL)
        return;
 
@@ -739,7 +738,7 @@ intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
    intelObj->mt = mt;
    texImage = _mesa_get_tex_image(&intel->ctx, texObj, target, level);
    _mesa_init_teximage_fields(&intel->ctx, target, texImage,
-			      pitch, height, 1,
+			      rb->region->pitch, rb->region->height, 1,
 			      0, internalFormat);
 
    intelImage = intel_texture_image(texImage);
@@ -748,7 +747,7 @@ intelSetTexBuffer(__DRIcontext *pDRICtx, GLint target,
    texImage->TexFormat = intelChooseTextureFormat(&intel->ctx, internalFormat,
                                                   type, format);
    _mesa_set_fetch_functions(texImage, 2);
-   texImage->RowStride = pitch;
+   texImage->RowStride = rb->region->pitch;
    intel_miptree_reference(&intelImage->mt, intelObj->mt);
 
    if (!intel_miptree_match_image(intelObj->mt, &intelImage->base,