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"
35 #include "sp_screen.h"
40 * Mark the current vertex layout as "invalid".
41 * We'll validate the vertex layout later, when we start to actually
42 * render a point or line or tri.
45 invalidate_vertex_layout(struct softpipe_context
*softpipe
)
47 softpipe
->vertex_info
.num_attribs
= 0;
52 * The vertex info describes how to convert the post-transformed vertices
53 * (simple float[][4]) used by the 'draw' module into vertices for
56 * This function validates the vertex layout and returns a pointer to a
60 softpipe_get_vertex_info(struct softpipe_context
*softpipe
)
62 struct vertex_info
*vinfo
= &softpipe
->vertex_info
;
64 if (vinfo
->num_attribs
== 0) {
65 /* compute vertex layout now */
66 const struct sp_fragment_shader
*spfs
= softpipe
->fs
;
67 const enum interp_mode colorInterp
68 = softpipe
->rasterizer
->flatshade
? INTERP_CONSTANT
: INTERP_LINEAR
;
72 /* if using the post-transform vertex buffer, tell draw_vbuf to
73 * simply emit the whole post-xform vertex as-is:
75 struct vertex_info
*vinfo_vbuf
= &softpipe
->vertex_info_vbuf
;
76 const uint num
= draw_num_vs_outputs(softpipe
->draw
);
79 /* No longer any need to try and emit draw vertex_header info.
81 vinfo_vbuf
->num_attribs
= 0;
82 for (i
= 0; i
< num
; i
++) {
83 draw_emit_vertex_attr(vinfo_vbuf
, EMIT_4F
, INTERP_PERSPECTIVE
, i
);
85 draw_compute_vertex_size(vinfo_vbuf
);
89 * Loop over fragment shader inputs, searching for the matching output
90 * from the vertex shader.
92 vinfo
->num_attribs
= 0;
93 for (i
= 0; i
< spfs
->info
.num_inputs
; i
++) {
95 switch (spfs
->info
.input_semantic_name
[i
]) {
96 case TGSI_SEMANTIC_POSITION
:
97 src
= draw_find_vs_output(softpipe
->draw
,
98 TGSI_SEMANTIC_POSITION
, 0);
99 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_POS
, src
);
102 case TGSI_SEMANTIC_COLOR
:
103 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_COLOR
,
104 spfs
->info
.input_semantic_index
[i
]);
105 draw_emit_vertex_attr(vinfo
, EMIT_4F
, colorInterp
, src
);
108 case TGSI_SEMANTIC_FOG
:
109 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_FOG
, 0);
110 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_PERSPECTIVE
, src
);
113 case TGSI_SEMANTIC_GENERIC
:
114 case TGSI_SEMANTIC_FACE
:
115 /* this includes texcoords and varying vars */
116 src
= draw_find_vs_output(softpipe
->draw
, TGSI_SEMANTIC_GENERIC
,
117 spfs
->info
.input_semantic_index
[i
]);
118 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_PERSPECTIVE
, src
);
126 softpipe
->psize_slot
= draw_find_vs_output(softpipe
->draw
,
127 TGSI_SEMANTIC_PSIZE
, 0);
128 if (softpipe
->psize_slot
> 0) {
129 draw_emit_vertex_attr(vinfo
, EMIT_4F
, INTERP_CONSTANT
,
130 softpipe
->psize_slot
);
133 draw_compute_vertex_size(vinfo
);
141 * Called from vbuf module.
143 * Note that there's actually two different vertex layouts in softpipe.
145 * The normal one is computed in softpipe_get_vertex_info() above and is
146 * used by the point/line/tri "setup" code.
148 * The other one (this one) is only used by the vbuf module (which is
149 * not normally used by default but used in testing). For the vbuf module,
150 * we basically want to pass-through the draw module's vertex layout as-is.
151 * When the softpipe vbuf code begins drawing, the normal vertex layout
152 * will come into play again.
155 softpipe_get_vbuf_vertex_info(struct softpipe_context
*softpipe
)
157 (void) softpipe_get_vertex_info(softpipe
);
158 return &softpipe
->vertex_info_vbuf
;
163 * Recompute cliprect from scissor bounds, scissor enable and surface size.
166 compute_cliprect(struct softpipe_context
*sp
)
168 uint surfWidth
= sp
->framebuffer
.width
;
169 uint surfHeight
= sp
->framebuffer
.height
;
171 if (sp
->rasterizer
->scissor
) {
172 /* clip to scissor rect */
173 sp
->cliprect
.minx
= MAX2(sp
->scissor
.minx
, 0);
174 sp
->cliprect
.miny
= MAX2(sp
->scissor
.miny
, 0);
175 sp
->cliprect
.maxx
= MIN2(sp
->scissor
.maxx
, surfWidth
);
176 sp
->cliprect
.maxy
= MIN2(sp
->scissor
.maxy
, surfHeight
);
179 /* clip to surface bounds */
180 sp
->cliprect
.minx
= 0;
181 sp
->cliprect
.miny
= 0;
182 sp
->cliprect
.maxx
= surfWidth
;
183 sp
->cliprect
.maxy
= surfHeight
;
189 update_tgsi_samplers( struct softpipe_context
*softpipe
)
193 /* vertex shader samplers */
194 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
195 softpipe
->tgsi
.vert_samplers
[i
].sampler
= softpipe
->sampler
[i
];
196 softpipe
->tgsi
.vert_samplers
[i
].texture
= softpipe
->texture
[i
];
199 /* fragment shader samplers */
200 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
201 softpipe
->tgsi
.frag_samplers
[i
].sampler
= softpipe
->sampler
[i
];
202 softpipe
->tgsi
.frag_samplers
[i
].texture
= softpipe
->texture
[i
];
205 for (i
= 0; i
< PIPE_MAX_SAMPLERS
; i
++) {
206 sp_tile_cache_validate_texture( softpipe
->tex_cache
[i
] );
210 /* Hopefully this will remain quite simple, otherwise need to pull in
211 * something like the state tracker mechanism.
213 void softpipe_update_derived( struct softpipe_context
*softpipe
)
215 struct softpipe_screen
*sp_screen
= softpipe_screen(softpipe
->pipe
.screen
);
217 /* Check for updated textures.
219 if (softpipe
->tex_timestamp
!= sp_screen
->timestamp
) {
220 softpipe
->tex_timestamp
= sp_screen
->timestamp
;
221 softpipe
->dirty
|= SP_NEW_TEXTURE
;
224 if (softpipe
->dirty
& (SP_NEW_SAMPLER
|
226 update_tgsi_samplers( softpipe
);
228 if (softpipe
->dirty
& (SP_NEW_RASTERIZER
|
231 invalidate_vertex_layout( softpipe
);
233 if (softpipe
->dirty
& (SP_NEW_SCISSOR
|
234 SP_NEW_DEPTH_STENCIL_ALPHA
|
236 compute_cliprect(softpipe
);
238 if (softpipe
->dirty
& (SP_NEW_BLEND
|
239 SP_NEW_DEPTH_STENCIL_ALPHA
|
244 sp_build_quad_pipeline(softpipe
);