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
brw_is_drawing_points(const struct brw_context * brw)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
brw_is_drawing_lines(const struct brw_context * brw)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 
91