1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
28 #include "util/u_math.h"
29 #include "util/u_memory.h"
30 #include "pipe/p_shader_tokens.h"
31 #include "draw/draw_context.h"
32 #include "draw/draw_vertex.h"
33 #include "draw/draw_private.h"
34 #include "sp_context.h"
39 * Mark the current vertex layout as "invalid".
40 * We'll validate the vertex layout later, when we start to actually
41 * render a point or line or tri.
44 invalidate_vertex_layout(struct softpipe_context
*softpipe
)
46 softpipe
->vertex_info
.num_attribs
= 0;
51 * The vertex info describes how to convert the post-transformed vertices
52 * (simple float[][4]) used by the 'draw' module into vertices for
55 * This function validates the vertex layout and returns a pointer to a
59 softpipe_get_vertex_info(struct softpipe_context
*softpipe
)
61 struct vertex_info
*vinfo
= &softpipe
->vertex_info
;
63 if (vinfo
->num_attribs
== 0) {
64 /* compute vertex layout now */
65 const struct sp_fragment_shader
*spfs
= softpipe
->fs
;
66 const enum interp_mode colorInterp
67 = softpipe
->rasterizer
->flatshade
? INTERP_CONSTANT
: INTERP_LINEAR
;
71 /* if using the post-transform vertex buffer, tell draw_vbuf to
72 * simply emit the whole post-xform vertex as-is:
74 struct vertex_info
*vinfo_vbuf
= &softpipe
->vertex_info_vbuf
;
75 const uint num
= draw_num_vs_outputs(softpipe
->draw
);
78 /* No longer any need to try and emit draw vertex_header info.
80 vinfo_vbuf
->num_attribs
= 0;
81 for (i
= 0; i
< num
; i
++) {
82 draw_emit_vertex_attr(vinfo_vbuf
, EMIT_4F
, INTERP_PERSPECTIVE
, i
);
84 draw_compute_vertex_size(vinfo_vbuf
);
88 * Loop over fragment shader inputs, searching for the matching output
89 * from the vertex shader.
91 vinfo
->num_attribs
= 0;
92 for (i
= 0; i
< spfs
->info
.num_inputs
; i
++) {
94 switch (spfs
->info
.input_semantic_name
[i
]) {
95 case TGSI_SEMANTIC_POSITION
:
96 src
= draw_find_vs_output(softpipe
->draw
,
97 TGSI_SEMANTIC_POSITION
, 0);
98 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_POS
, src
);
101 case TGSI_SEMANTIC_COLOR
:
102 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_COLOR
,
103 spfs
->info
.input_semantic_index
[i
]);
104 draw_emit_vertex_attr(vinfo
, EMIT_4F
, colorInterp
, src
);
107 case TGSI_SEMANTIC_FOG
:
108 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_FOG
, 0);
109 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_PERSPECTIVE
, src
);
112 case TGSI_SEMANTIC_GENERIC
:
113 /* this includes texcoords and varying vars */
114 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_GENERIC
,
115 spfs
->info
.input_semantic_index
[i
]);
116 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_PERSPECTIVE
, src
);
124 softpipe
->psize_slot
= draw_find_vs_output(softpipe
->draw
,
125 TGSI_SEMANTIC_PSIZE
, 0);
126 if (softpipe
->psize_slot
> 0) {
127 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_CONSTANT
,
128 softpipe
->psize_slot
);
131 draw_compute_vertex_size(vinfo
);
139 * Called from vbuf module.
141 * Note that there's actually two different vertex layouts in softpipe.
143 * The normal one is computed in softpipe_get_vertex_info() above and is
144 * used by the point/line/tri "setup" code.
146 * The other one (this one) is only used by the vbuf module (which is
147 * not normally used by default but used in testing). For the vbuf module,
148 * we basically want to pass-through the draw module's vertex layout as-is.
149 * When the softpipe vbuf code begins drawing, the normal vertex layout
150 * will come into play again.
153 softpipe_get_vbuf_vertex_info(struct softpipe_context
*softpipe
)
155 (void) softpipe_get_vertex_info(softpipe
);
156 return &softpipe
->vertex_info_vbuf
;
161 * Recompute cliprect from scissor bounds, scissor enable and surface size.
164 compute_cliprect(struct softpipe_context
*sp
)
166 uint surfWidth
= sp
->framebuffer
.width
;
167 uint surfHeight
= sp
->framebuffer
.height
;
169 if (sp
->rasterizer
->scissor
) {
170 /* clip to scissor rect */
171 sp
->cliprect
.minx
= MAX2(sp
->scissor
.minx
, 0);
172 sp
->cliprect
.miny
= MAX2(sp
->scissor
.miny
, 0);
173 sp
->cliprect
.maxx
= MIN2(sp
->scissor
.maxx
, surfWidth
);
174 sp
->cliprect
.maxy
= MIN2(sp
->scissor
.maxy
, surfHeight
);
177 /* clip to surface bounds */
178 sp
->cliprect
.minx
= 0;
179 sp
->cliprect
.miny
= 0;
180 sp
->cliprect
.maxx
= surfWidth
;
181 sp
->cliprect
.maxy
= surfHeight
;
186 /* Hopefully this will remain quite simple, otherwise need to pull in
187 * something like the state tracker mechanism.
189 void softpipe_update_derived( struct softpipe_context
*softpipe
)
191 if (softpipe
->dirty
& (SP_NEW_RASTERIZER
|
194 invalidate_vertex_layout( softpipe
);
196 if (softpipe
->dirty
& (SP_NEW_SCISSOR
|
197 SP_NEW_DEPTH_STENCIL_ALPHA
|
199 compute_cliprect(softpipe
);
201 if (softpipe
->dirty
& (SP_NEW_BLEND
|
202 SP_NEW_DEPTH_STENCIL_ALPHA
|
207 sp_build_quad_pipeline(softpipe
);