1/**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE 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#include "draw/draw_pipe.h"
29#include "util/u_math.h"
30#include "util/u_memory.h"
31#include "util/u_pack_color.h"
32
33#include "i915_batch.h"
34#include "i915_context.h"
35#include "i915_reg.h"
36#include "i915_state.h"
37
38/**
39 * Primitive emit to hardware.  No support for vertex buffers or any
40 * nice fast paths.
41 */
42struct setup_stage {
43   struct draw_stage stage; /**< This must be first (base class) */
44
45   struct i915_context *i915;
46};
47
48/**
49 * Basically a cast wrapper.
50 */
51static inline struct setup_stage *
52setup_stage(struct draw_stage *stage)
53{
54   return (struct setup_stage *)stage;
55}
56
57/**
58 * Extract the needed fields from vertex_header and emit i915 dwords.
59 * Recall that the vertices are constructed by the 'draw' module and
60 * have a couple of slots at the beginning (1-dword header, 4-dword
61 * clip pos) that we ignore here.
62 */
63static inline void
64emit_hw_vertex(struct i915_context *i915, const struct vertex_header *vertex)
65{
66   const struct vertex_info *vinfo = &i915->current.vertex_info;
67   uint32_t i;
68   uint32_t count = 0; /* for debug/sanity */
69
70   assert(!i915->dirty);
71
72   for (i = 0; i < vinfo->num_attribs; i++) {
73      const uint32_t j = vinfo->attrib[i].src_index;
74      const float *attrib = vertex->data[j];
75      switch (vinfo->attrib[i].emit) {
76      case EMIT_1F:
77         OUT_BATCH(fui(attrib[0]));
78         count++;
79         break;
80      case EMIT_2F:
81         OUT_BATCH(fui(attrib[0]));
82         OUT_BATCH(fui(attrib[1]));
83         count += 2;
84         break;
85      case EMIT_3F:
86         OUT_BATCH(fui(attrib[0]));
87         OUT_BATCH(fui(attrib[1]));
88         OUT_BATCH(fui(attrib[2]));
89         count += 3;
90         break;
91      case EMIT_4F:
92         OUT_BATCH(fui(attrib[0]));
93         OUT_BATCH(fui(attrib[1]));
94         OUT_BATCH(fui(attrib[2]));
95         OUT_BATCH(fui(attrib[3]));
96         count += 4;
97         break;
98      case EMIT_4UB:
99         OUT_BATCH(
100            pack_ub4(float_to_ubyte(attrib[0]), float_to_ubyte(attrib[1]),
101                     float_to_ubyte(attrib[2]), float_to_ubyte(attrib[3])));
102         count += 1;
103         break;
104      case EMIT_4UB_BGRA:
105         OUT_BATCH(
106            pack_ub4(float_to_ubyte(attrib[2]), float_to_ubyte(attrib[1]),
107                     float_to_ubyte(attrib[0]), float_to_ubyte(attrib[3])));
108         count += 1;
109         break;
110      default:
111         assert(0);
112      }
113   }
114   assert(count == vinfo->size);
115}
116
117static inline void
118emit_prim(struct draw_stage *stage, struct prim_header *prim, unsigned hwprim,
119          unsigned nr)
120{
121   struct i915_context *i915 = setup_stage(stage)->i915;
122   unsigned vertex_size;
123   unsigned i;
124
125   if (i915->dirty)
126      i915_update_derived(i915);
127
128   if (i915->hardware_dirty)
129      i915_emit_hardware_state(i915);
130
131   /* need to do this after validation! */
132   vertex_size = i915->current.vertex_info.size * 4; /* in bytes */
133   assert(vertex_size >= 12); /* never smaller than 12 bytes */
134
135   if (!BEGIN_BATCH(1 + nr * vertex_size / 4)) {
136      FLUSH_BATCH(NULL, I915_FLUSH_ASYNC);
137
138      /* Make sure state is re-emitted after a flush:
139       */
140      i915_emit_hardware_state(i915);
141
142      if (!BEGIN_BATCH(1 + nr * vertex_size / 4)) {
143         assert(0);
144         return;
145      }
146   }
147
148   /* Emit each triangle as a single primitive.  I told you this was
149    * simple.
150    */
151   OUT_BATCH(_3DPRIMITIVE | hwprim | ((4 + vertex_size * nr) / 4 - 2));
152
153   for (i = 0; i < nr; i++)
154      emit_hw_vertex(i915, prim->v[i]);
155}
156
157static void
158setup_tri(struct draw_stage *stage, struct prim_header *prim)
159{
160   emit_prim(stage, prim, PRIM3D_TRILIST, 3);
161}
162
163static void
164setup_line(struct draw_stage *stage, struct prim_header *prim)
165{
166   emit_prim(stage, prim, PRIM3D_LINELIST, 2);
167}
168
169static void
170setup_point(struct draw_stage *stage, struct prim_header *prim)
171{
172   emit_prim(stage, prim, PRIM3D_POINTLIST, 1);
173}
174
175static void
176setup_flush(struct draw_stage *stage, unsigned flags)
177{
178}
179
180static void
181reset_stipple_counter(struct draw_stage *stage)
182{
183}
184
185static void
186render_destroy(struct draw_stage *stage)
187{
188   FREE(stage);
189}
190
191/**
192 * Create a new primitive setup/render stage.  This gets plugged into
193 * the 'draw' module's pipeline.
194 */
195struct draw_stage *
196i915_draw_render_stage(struct i915_context *i915)
197{
198   struct setup_stage *setup = CALLOC_STRUCT(setup_stage);
199
200   setup->i915 = i915;
201   setup->stage.draw = i915->draw;
202   setup->stage.point = setup_point;
203   setup->stage.line = setup_line;
204   setup->stage.tri = setup_tri;
205   setup->stage.flush = setup_flush;
206   setup->stage.reset_stipple_counter = reset_stipple_counter;
207   setup->stage.destroy = render_destroy;
208
209   return &setup->stage;
210}
211