src/mesa/drivers/dri/i965/gen6_clip_state.c

   1 /*
   2  * Copyright © 2009 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  * Authors:
  24  *    Eric Anholt <eric@anholt.net>
  25  *
  26  */
  27
  28 #include "brw_context.h"
  29 #include "brw_state.h"
  30 #include "brw_defines.h"
  31 #include "compiler/brw_eu_defines.h"
  32 #include "brw_util.h"
  33 #include "intel_batchbuffer.h"
  34 #include "main/fbobject.h"
  35 #include "main/framebuffer.h"
  36
  37 bool
  38 brw_is_drawing_points(const struct brw_context *brw)
  39 {
  40    /* Determine if the primitives *reaching the SF* are points */
  41    /* _NEW_POLYGON */
  42    if (brw->ctx.Polygon.FrontMode == GL_POINT ||
  43        brw->ctx.Polygon.BackMode == GL_POINT) {
  44       return true;
  45    }
  46
  47    if (brw->gs.base.prog_data) {
  48       /* BRW_NEW_GS_PROG_DATA */
  49       return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology ==
  50              _3DPRIM_POINTLIST;
  51    } else if (brw->tes.base.prog_data) {
  52       /* BRW_NEW_TES_PROG_DATA */
  53       return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology ==
  54              BRW_TESS_OUTPUT_TOPOLOGY_POINT;
  55    } else {
  56       /* BRW_NEW_PRIMITIVE */
  57       return brw->primitive == _3DPRIM_POINTLIST;
  58    }
  59 }
  60
  61 bool
  62 brw_is_drawing_lines(const struct brw_context *brw)
  63 {
  64    /* Determine if the primitives *reaching the SF* are points */
  65    /* _NEW_POLYGON */
  66    if (brw->ctx.Polygon.FrontMode == GL_LINE ||
  67        brw->ctx.Polygon.BackMode == GL_LINE) {
  68       return true;
  69    }
  70
  71    if (brw->gs.base.prog_data) {
  72       /* BRW_NEW_GS_PROG_DATA */
  73       return brw_gs_prog_data(brw->gs.base.prog_data)->output_topology ==
  74              _3DPRIM_LINESTRIP;
  75    } else if (brw->tes.base.prog_data) {
  76       /* BRW_NEW_TES_PROG_DATA */
  77       return brw_tes_prog_data(brw->tes.base.prog_data)->output_topology ==
  78              BRW_TESS_OUTPUT_TOPOLOGY_LINE;
  79    } else {
  80       /* BRW_NEW_PRIMITIVE */
  81       switch (brw->primitive) {
  82       case _3DPRIM_LINELIST:
  83       case _3DPRIM_LINESTRIP:
  84       case _3DPRIM_LINELOOP:
  85          return true;
  86       }
  87    }
  88    return false;
  89 }
  90