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/**************************************************************************
*
* Copyright 2010 Christian König
* 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 vl_idct_h
#define vl_idct_h
#include <pipe/p_state.h>
/* shader based inverse distinct cosinus transformation
* expect usage of vl_vertex_buffers as a todo list
*/
struct vl_idct
{
struct pipe_context *pipe;
unsigned buffer_width;
unsigned buffer_height;
unsigned blocks_x, blocks_y;
unsigned nr_of_render_targets;
void *rs_state;
void *samplers[2];
void *matrix_vs, *transpose_vs;
void *matrix_fs, *transpose_fs;
struct pipe_sampler_view *matrix;
};
/* a set of buffers to work with */
struct vl_idct_buffer
{
struct pipe_viewport_state viewport[2];
struct pipe_framebuffer_state fb_state[2];
union
{
struct pipe_sampler_view *all[4];
struct pipe_sampler_view *stage[2][2];
struct {
struct pipe_sampler_view *matrix, *source;
struct pipe_sampler_view *transpose, *intermediate;
} individual;
} sampler_views;
};
/* upload the idct matrix, which can be shared by all idct instances of a pipe */
struct pipe_sampler_view *vl_idct_upload_matrix(struct pipe_context *pipe, float scale);
/* init an idct instance */
bool vl_idct_init(struct vl_idct *idct, struct pipe_context *pipe,
unsigned buffer_width, unsigned buffer_height,
unsigned blocks_x, unsigned blocks_y,
unsigned nr_of_render_targets,
struct pipe_sampler_view *matrix);
/* destroy an idct instance */
void vl_idct_cleanup(struct vl_idct *idct);
/* init a buffer assosiated with agiven idct instance */
bool vl_idct_init_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer,
struct pipe_sampler_view *source,
struct pipe_sampler_view *intermediate,
struct pipe_surface *destination);
/* cleanup a buffer of an idct instance */
void vl_idct_cleanup_buffer(struct vl_idct *idct, struct vl_idct_buffer *buffer);
/* flush the buffer and start rendering, vertex buffers needs to be setup before calling this */
void vl_idct_flush(struct vl_idct *idct, struct vl_idct_buffer *buffer, unsigned num_verts);
#endif
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