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
29 #include "draw/draw_pipe.h"
30 #include "util/u_math.h"
31 #include "util/u_memory.h"
32 #include "util/u_pack_color.h"
33
34 #include "i915_context.h"
35 #include "i915_reg.h"
36 #include "i915_state.h"
37 #include "i915_batch.h"
38
39
40
41 /**
42 * Primitive emit to hardware. No support for vertex buffers or any
43 * nice fast paths.
44 */
45 struct setup_stage {
46 struct draw_stage stage; /**< This must be first (base class) */
47
48 struct i915_context *i915;
49 };
50
51
52
53 /**
54 * Basically a cast wrapper.
55 */
setup_stage(struct draw_stage * stage)56 static INLINE struct setup_stage *setup_stage( struct draw_stage *stage )
57 {
58 return (struct setup_stage *)stage;
59 }
60
61
62 /**
63 * Extract the needed fields from vertex_header and emit i915 dwords.
64 * Recall that the vertices are constructed by the 'draw' module and
65 * have a couple of slots at the beginning (1-dword header, 4-dword
66 * clip pos) that we ignore here.
67 */
68 static INLINE void
emit_hw_vertex(struct i915_context * i915,const struct vertex_header * vertex)69 emit_hw_vertex( struct i915_context *i915,
70 const struct vertex_header *vertex)
71 {
72 const struct vertex_info *vinfo = &i915->current.vertex_info;
73 uint i;
74 uint count = 0; /* for debug/sanity */
75
76 assert(!i915->dirty);
77
78 for (i = 0; i < vinfo->num_attribs; i++) {
79 const uint j = vinfo->attrib[i].src_index;
80 const float *attrib = vertex->data[j];
81 switch (vinfo->attrib[i].emit) {
82 case EMIT_1F:
83 OUT_BATCH( fui(attrib[0]) );
84 count++;
85 break;
86 case EMIT_2F:
87 OUT_BATCH( fui(attrib[0]) );
88 OUT_BATCH( fui(attrib[1]) );
89 count += 2;
90 break;
91 case EMIT_3F:
92 OUT_BATCH( fui(attrib[0]) );
93 OUT_BATCH( fui(attrib[1]) );
94 OUT_BATCH( fui(attrib[2]) );
95 count += 3;
96 break;
97 case EMIT_4F:
98 OUT_BATCH( fui(attrib[0]) );
99 OUT_BATCH( fui(attrib[1]) );
100 OUT_BATCH( fui(attrib[2]) );
101 OUT_BATCH( fui(attrib[3]) );
102 count += 4;
103 break;
104 case EMIT_4UB:
105 OUT_BATCH( pack_ub4(float_to_ubyte( attrib[0] ),
106 float_to_ubyte( attrib[1] ),
107 float_to_ubyte( attrib[2] ),
108 float_to_ubyte( attrib[3] )) );
109 count += 1;
110 break;
111 case EMIT_4UB_BGRA:
112 OUT_BATCH( pack_ub4(float_to_ubyte( attrib[2] ),
113 float_to_ubyte( attrib[1] ),
114 float_to_ubyte( attrib[0] ),
115 float_to_ubyte( attrib[3] )) );
116 count += 1;
117 break;
118 default:
119 assert(0);
120 }
121 }
122 assert(count == vinfo->size);
123 }
124
125
126
127 static INLINE void
emit_prim(struct draw_stage * stage,struct prim_header * prim,unsigned hwprim,unsigned nr)128 emit_prim( struct draw_stage *stage,
129 struct prim_header *prim,
130 unsigned hwprim,
131 unsigned nr )
132 {
133 struct i915_context *i915 = setup_stage(stage)->i915;
134 unsigned vertex_size;
135 unsigned i;
136
137 if (i915->dirty)
138 i915_update_derived( i915 );
139
140 if (i915->hardware_dirty)
141 i915_emit_hardware_state( i915 );
142
143 /* need to do this after validation! */
144 vertex_size = i915->current.vertex_info.size * 4; /* in bytes */
145 assert(vertex_size >= 12); /* never smaller than 12 bytes */
146
147 if (!BEGIN_BATCH( 1 + nr * vertex_size / 4)) {
148 FLUSH_BATCH(NULL);
149
150 /* Make sure state is re-emitted after a flush:
151 */
152 i915_emit_hardware_state( i915 );
153
154 if (!BEGIN_BATCH( 1 + nr * vertex_size / 4)) {
155 assert(0);
156 return;
157 }
158 }
159
160 /* Emit each triangle as a single primitive. I told you this was
161 * simple.
162 */
163 OUT_BATCH(_3DPRIMITIVE |
164 hwprim |
165 ((4 + vertex_size * nr)/4 - 2));
166
167 for (i = 0; i < nr; i++)
168 emit_hw_vertex(i915, prim->v[i]);
169 }
170
171
172 static void
setup_tri(struct draw_stage * stage,struct prim_header * prim)173 setup_tri( struct draw_stage *stage, struct prim_header *prim )
174 {
175 emit_prim( stage, prim, PRIM3D_TRILIST, 3 );
176 }
177
178
179 static void
setup_line(struct draw_stage * stage,struct prim_header * prim)180 setup_line(struct draw_stage *stage, struct prim_header *prim)
181 {
182 emit_prim( stage, prim, PRIM3D_LINELIST, 2 );
183 }
184
185
186 static void
setup_point(struct draw_stage * stage,struct prim_header * prim)187 setup_point(struct draw_stage *stage, struct prim_header *prim)
188 {
189 emit_prim( stage, prim, PRIM3D_POINTLIST, 1 );
190 }
191
192
setup_flush(struct draw_stage * stage,unsigned flags)193 static void setup_flush( struct draw_stage *stage, unsigned flags )
194 {
195 }
196
reset_stipple_counter(struct draw_stage * stage)197 static void reset_stipple_counter( struct draw_stage *stage )
198 {
199 }
200
render_destroy(struct draw_stage * stage)201 static void render_destroy( struct draw_stage *stage )
202 {
203 FREE( stage );
204 }
205
206
207 /**
208 * Create a new primitive setup/render stage. This gets plugged into
209 * the 'draw' module's pipeline.
210 */
i915_draw_render_stage(struct i915_context * i915)211 struct draw_stage *i915_draw_render_stage( struct i915_context *i915 )
212 {
213 struct setup_stage *setup = CALLOC_STRUCT(setup_stage);
214
215 setup->i915 = i915;
216 setup->stage.draw = i915->draw;
217 setup->stage.point = setup_point;
218 setup->stage.line = setup_line;
219 setup->stage.tri = setup_tri;
220 setup->stage.flush = setup_flush;
221 setup->stage.reset_stipple_counter = reset_stipple_counter;
222 setup->stage.destroy = render_destroy;
223
224 return &setup->stage;
225 }
226