intel_regions.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/**************************************************************************
 * 
 * Copyright 2006 Tungsten Graphics, Inc., Cedar Park, Texas.
 * All Rights Reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
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 * distribute, sub license, 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 (including the
 * next paragraph) 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 NON-INFRINGEMENT.
 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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#ifndef INTEL_REGIONS_H
#define INTEL_REGIONS_H

#include "mtypes.h"
#include "dri_bufmgr.h"

struct intel_context;
struct intel_buffer_object;

/**
 * A layer on top of the bufmgr buffers that adds a few useful things:
 *
 * - Refcounting for local buffer references.
 * - Refcounting for buffer maps
 * - Buffer dimensions - pitch and height.
 * - Blitter commands for copying 2D regions between buffers. (really???)
 */
struct intel_region
{
   dri_bo *buffer;  /**< buffer manager's buffer */
   GLuint refcount; /**< Reference count for region */
   GLuint cpp;      /**< bytes per pixel */
   GLuint pitch;    /**< in pixels */
   GLuint height;   /**< in pixels */
   GLubyte *map;    /**< only non-NULL when region is actually mapped */
   GLuint map_refcount;  /**< Reference count for mapping */

   GLuint draw_offset; /**< Offset of drawing address within the region */
   GLboolean tiled; /**< True if the region is X or Y-tiled.  Used on 965. */

   struct intel_buffer_object *pbo;     /* zero-copy uploads */
};


/* Allocate a refcounted region.  Pointers to regions should only be
 * copied by calling intel_reference_region().
 */
struct intel_region *intel_region_alloc(struct intel_context *intel,
                                        GLuint cpp,
                                        GLuint pitch, GLuint height);

struct intel_region *
intel_region_alloc_for_handle(struct intel_context *intel,
			      GLuint cpp, GLuint pitch, GLuint height,
			      GLuint tiled, unsigned int handle);

void intel_region_reference(struct intel_region **dst,
                            struct intel_region *src);

void intel_region_release(struct intel_region **ib);

void intel_recreate_static_regions(struct intel_context *intel);

/* Map/unmap regions.  This is refcounted also: 
 */
GLubyte *intel_region_map(struct intel_context *intel,
                          struct intel_region *ib);

void intel_region_unmap(struct intel_context *intel, struct intel_region *ib);


/* Upload data to a rectangular sub-region
 */
void intel_region_data(struct intel_context *intel,
                       struct intel_region *dest,
                       GLuint dest_offset,
                       GLuint destx, GLuint desty,
                       const void *src, GLuint src_stride,
                       GLuint srcx, GLuint srcy, GLuint width, GLuint height);

/* Copy rectangular sub-regions
 */
void intel_region_copy(struct intel_context *intel,
                       struct intel_region *dest,
                       GLuint dest_offset,
                       GLuint destx, GLuint desty,
                       struct intel_region *src,
                       GLuint src_offset,
                       GLuint srcx, GLuint srcy, GLuint width, GLuint height);

/* Fill a rectangular sub-region
 */
void intel_region_fill(struct intel_context *intel,
                       struct intel_region *dest,
                       GLuint dest_offset,
                       GLuint destx, GLuint desty,
                       GLuint width, GLuint height, GLuint color);

/* Helpers for zerocopy uploads, particularly texture image uploads:
 */
void intel_region_attach_pbo(struct intel_context *intel,
                             struct intel_region *region,
                             struct intel_buffer_object *pbo);
void intel_region_release_pbo(struct intel_context *intel,
                              struct intel_region *region);
void intel_region_cow(struct intel_context *intel,
                      struct intel_region *region);

dri_bo *intel_region_buffer(struct intel_context *intel,
			    struct intel_region *region,
			    GLuint flag);

void _mesa_copy_rect(GLubyte * dst,
                GLuint cpp,
                GLuint dst_pitch,
                GLuint dst_x,
                GLuint dst_y,
                GLuint width,
                GLuint height,
                const GLubyte * src,
                GLuint src_pitch, GLuint src_x, GLuint src_y);

#endif