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      1 /**************************************************************************
      2  *
      3  * Copyright 2007 VMware, Inc.
      4  * All Rights Reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the
      8  * "Software"), to deal in the Software without restriction, including
      9  * without limitation the rights to use, copy, modify, merge, publish,
     10  * distribute, sub license, and/or sell copies of the Software, and to
     11  * permit persons to whom the Software is furnished to do so, subject to
     12  * the following conditions:
     13  *
     14  * The above copyright notice and this permission notice (including the
     15  * next paragraph) shall be included in all copies or substantial portions
     16  * of the Software.
     17  *
     18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
     21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
     22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
     23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
     24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     25  *
     26  **************************************************************************/
     27 #ifndef SP_SETUP_H
     28 #define SP_SETUP_H
     29 
     30 struct setup_context;
     31 struct softpipe_context;
     32 
     33 /**
     34  * Attribute interpolation mode
     35  */
     36 enum sp_interp_mode {
     37    SP_INTERP_POS,       /**< special case for frag position */
     38    SP_INTERP_CONSTANT,
     39    SP_INTERP_LINEAR,
     40    SP_INTERP_PERSPECTIVE
     41 };
     42 
     43 
     44 struct sp_setup_info {
     45    unsigned valid;
     46    struct {
     47       unsigned interp:8;      /**< SP_INTERP_X */
     48       int src_index:8;
     49    } attrib[PIPE_MAX_SHADER_OUTPUTS];
     50 };
     51 
     52 void
     53 sp_setup_tri(struct setup_context *setup,
     54              const float (*v0)[4],
     55              const float (*v1)[4],
     56              const float (*v2)[4]);
     57 
     58 void
     59 sp_setup_line(struct setup_context *setup,
     60            const float (*v0)[4],
     61            const float (*v1)[4]);
     62 
     63 void
     64 sp_setup_point( struct setup_context *setup,
     65              const float (*v0)[4] );
     66 
     67 static inline unsigned
     68 sp_clamp_viewport_idx(int idx)
     69 {
     70    return (PIPE_MAX_VIEWPORTS > idx && idx >= 0) ? idx : 0;
     71 }
     72 
     73 struct setup_context *sp_setup_create_context( struct softpipe_context *softpipe );
     74 void sp_setup_prepare( struct setup_context *setup );
     75 void sp_setup_destroy_context( struct setup_context *setup );
     76 
     77 #endif
     78