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/**************************************************************************
*
* Copyright 2007 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
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* 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,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
#ifndef PIPE_CONTEXT_H
#define PIPE_CONTEXT_H
#include "p_state.h"
#ifdef __cplusplus
extern "C" {
#endif
struct pipe_screen;
struct pipe_fence_handle;
struct pipe_state_cache;
struct pipe_query;
struct pipe_winsys;
/**
* Gallium rendering context. Basically:
* - state setting functions
* - VBO drawing functions
* - surface functions
*/
struct pipe_context {
struct pipe_winsys *winsys;
struct pipe_screen *screen;
void *priv; /**< context private data (for DRI for example) */
void *draw; /**< private, for draw module (temporary?) */
void (*destroy)( struct pipe_context * );
/* Possible interface for setting edgeflags. These aren't really
* vertex elements, so don't fit there.
*/
void (*set_edgeflags)( struct pipe_context *,
const unsigned *bitfield );
/**
* VBO drawing (return false on fallbacks (temporary??))
*/
/*@{*/
boolean (*draw_arrays)( struct pipe_context *pipe,
unsigned mode, unsigned start, unsigned count);
boolean (*draw_elements)( struct pipe_context *pipe,
struct pipe_buffer *indexBuffer,
unsigned indexSize,
unsigned mode, unsigned start, unsigned count);
/* XXX: this is (probably) a temporary entrypoint, as the range
* information should be available from the vertex_buffer state.
* Using this to quickly evaluate a specialized path in the draw
* module.
*/
boolean (*draw_range_elements)( struct pipe_context *pipe,
struct pipe_buffer *indexBuffer,
unsigned indexSize,
unsigned minIndex,
unsigned maxIndex,
unsigned mode,
unsigned start,
unsigned count);
/*@}*/
/**
* Query objects
*/
/*@{*/
struct pipe_query *(*create_query)( struct pipe_context *pipe,
unsigned query_type );
void (*destroy_query)(struct pipe_context *pipe,
struct pipe_query *q);
void (*begin_query)(struct pipe_context *pipe, struct pipe_query *q);
void (*end_query)(struct pipe_context *pipe, struct pipe_query *q);
boolean (*get_query_result)(struct pipe_context *pipe,
struct pipe_query *q,
boolean wait,
uint64_t *result);
/*@}*/
/**
* State functions (create/bind/destroy state objects)
*/
/*@{*/
void * (*create_blend_state)(struct pipe_context *,
const struct pipe_blend_state *);
void (*bind_blend_state)(struct pipe_context *, void *);
void (*delete_blend_state)(struct pipe_context *, void *);
void * (*create_sampler_state)(struct pipe_context *,
const struct pipe_sampler_state *);
void (*bind_sampler_states)(struct pipe_context *, unsigned num, void **);
void (*delete_sampler_state)(struct pipe_context *, void *);
void * (*create_rasterizer_state)(struct pipe_context *,
const struct pipe_rasterizer_state *);
void (*bind_rasterizer_state)(struct pipe_context *, void *);
void (*delete_rasterizer_state)(struct pipe_context *, void *);
void * (*create_depth_stencil_alpha_state)(struct pipe_context *,
const struct pipe_depth_stencil_alpha_state *);
void (*bind_depth_stencil_alpha_state)(struct pipe_context *, void *);
void (*delete_depth_stencil_alpha_state)(struct pipe_context *, void *);
void * (*create_fs_state)(struct pipe_context *,
const struct pipe_shader_state *);
void (*bind_fs_state)(struct pipe_context *, void *);
void (*delete_fs_state)(struct pipe_context *, void *);
void * (*create_vs_state)(struct pipe_context *,
const struct pipe_shader_state *);
void (*bind_vs_state)(struct pipe_context *, void *);
void (*delete_vs_state)(struct pipe_context *, void *);
/*@}*/
/**
* Parameter-like state (or properties)
*/
/*@{*/
void (*set_blend_color)( struct pipe_context *,
const struct pipe_blend_color * );
void (*set_clip_state)( struct pipe_context *,
const struct pipe_clip_state * );
void (*set_constant_buffer)( struct pipe_context *,
uint shader, uint index,
const struct pipe_constant_buffer *buf );
void (*set_framebuffer_state)( struct pipe_context *,
const struct pipe_framebuffer_state * );
void (*set_polygon_stipple)( struct pipe_context *,
const struct pipe_poly_stipple * );
void (*set_scissor_state)( struct pipe_context *,
const struct pipe_scissor_state * );
void (*set_viewport_state)( struct pipe_context *,
const struct pipe_viewport_state * );
void (*set_sampler_textures)( struct pipe_context *,
unsigned num_textures,
struct pipe_texture ** );
void (*set_vertex_buffers)( struct pipe_context *,
unsigned num_buffers,
const struct pipe_vertex_buffer * );
void (*set_vertex_elements)( struct pipe_context *,
unsigned num_elements,
const struct pipe_vertex_element * );
/*@}*/
/**
* Surface functions
*
* The pipe driver is allowed to set these functions to NULL, and in that
* case, they will not be available.
*/
/*@{*/
/**
* Copy a block of pixels from one surface to another.
* The surfaces must be of the same format.
*/
void (*surface_copy)(struct pipe_context *pipe,
struct pipe_surface *dest,
unsigned destx, unsigned desty,
struct pipe_surface *src,
unsigned srcx, unsigned srcy,
unsigned width, unsigned height);
/**
* Fill a region of a surface with a constant value.
*/
void (*surface_fill)(struct pipe_context *pipe,
struct pipe_surface *dst,
unsigned dstx, unsigned dsty,
unsigned width, unsigned height,
unsigned value);
/*@}*/
/**
* Clear the specified set of currently bound buffers to specified values.
* The entire buffers are cleared (no scissor, no colormask, etc).
*
* \param buffers bitfield of PIPE_CLEAR_* values.
* \param rgba pointer to an array of one float for each of r, g, b, a.
* \param depth depth clear value in [0,1].
* \param stencil stencil clear value
*/
void (*clear)(struct pipe_context *pipe,
unsigned buffers,
const float *rgba,
double depth,
unsigned stencil);
/** Flush rendering
* \param flags bitmask of PIPE_FLUSH_x tokens)
*/
void (*flush)( struct pipe_context *pipe,
unsigned flags,
struct pipe_fence_handle **fence );
/**
* Check whether a texture is referenced by an unflushed hw command.
* The state-tracker uses this function to optimize away unnecessary
* flushes. It is safe (but wasteful) to always return.
* PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
* \param pipe The pipe context whose unflushed hw commands will be
* checked.
* \param level mipmap level.
* \param texture texture to check.
* \param face cubemap face. Use 0 for non-cubemap texture.
*/
unsigned int (*is_texture_referenced) (struct pipe_context *pipe,
struct pipe_texture *texture,
unsigned face, unsigned level);
/**
* Check whether a buffer is referenced by an unflushed hw command.
* The state-tracker uses this function to optimize away unnecessary
* flushes. It is safe (but wasteful) to always return
* PIPE_REFERENCED_FOR_READ | PIPE_REFERENCED_FOR_WRITE.
* \param pipe The pipe context whose unflushed hw commands will be
* checked.
* \param buf Buffer to check.
*/
unsigned int (*is_buffer_referenced) (struct pipe_context *pipe,
struct pipe_buffer *buf);
};
#ifdef __cplusplus
}
#endif
#endif /* PIPE_CONTEXT_H */
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