src/gallium/drivers/llvmpipe/lp_state_clip.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
   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 TUNGSTEN GRAPHICS 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
  28 /* Authors:  Keith Whitwell <keith@tungstengraphics.com>
  29  */
  30 #include "lp_context.h"
  31 #include "lp_state.h"
  32 #include "draw/draw_context.h"
  33
  34
  35 static void
  36 llvmpipe_set_clip_state(struct pipe_context *pipe,
  37                         const struct pipe_clip_state *clip)
  38 {
  39    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  40
  41    /* pass the clip state to the draw module */
  42    draw_set_clip_state(llvmpipe->draw, clip);
  43 }
  44
  45
  46 static void
  47 llvmpipe_set_viewport_states(struct pipe_context *pipe,
  48                              unsigned start_slot,
  49                              unsigned num_viewports,
  50                              const struct pipe_viewport_state *viewports)
  51 {
  52    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  53
  54    /* pass the viewport info to the draw module */
  55    draw_set_viewport_states(llvmpipe->draw, start_slot, num_viewports,
  56                             viewports);
  57
  58    memcpy(llvmpipe->viewports + start_slot, viewports,
  59           sizeof(struct pipe_viewport_state) * num_viewports);
  60    llvmpipe->dirty |= LP_NEW_VIEWPORT;
  61 }
  62
  63
  64 static void
  65 llvmpipe_set_scissor_states(struct pipe_context *pipe,
  66                             unsigned start_slot,
  67                             unsigned num_scissors,
  68                             const struct pipe_scissor_state *scissors)
  69 {
  70    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  71
  72    draw_flush(llvmpipe->draw);
  73
  74    debug_assert(start_slot < PIPE_MAX_VIEWPORTS);
  75    debug_assert((start_slot + num_scissors) <= PIPE_MAX_VIEWPORTS);
  76
  77    memcpy(llvmpipe->scissors + start_slot, scissors,
  78           sizeof(struct pipe_scissor_state) * num_scissors);
  79
  80    llvmpipe->dirty |= LP_NEW_SCISSOR;
  81 }
  82
  83
  84 static void
  85 llvmpipe_set_polygon_stipple(struct pipe_context *pipe,
  86                              const struct pipe_poly_stipple *stipple)
  87 {
  88    struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
  89
  90    draw_flush(llvmpipe->draw);
  91
  92    llvmpipe->poly_stipple = *stipple; /* struct copy */
  93    llvmpipe->dirty |= LP_NEW_STIPPLE;
  94 }
  95
  96
  97
  98 void
  99 llvmpipe_init_clip_funcs(struct llvmpipe_context *llvmpipe)
 100 {
 101    llvmpipe->pipe.set_clip_state = llvmpipe_set_clip_state;
 102    llvmpipe->pipe.set_polygon_stipple = llvmpipe_set_polygon_stipple;
 103    llvmpipe->pipe.set_scissor_states = llvmpipe_set_scissor_states;
 104    llvmpipe->pipe.set_viewport_states = llvmpipe_set_viewport_states;
 105 }