1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 1999-2008 Brian Paul 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 "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors:
25 * Keith Whitwell <keithw@vmware.com>
26 */
27
28
29 #include "main/glheader.h"
30 #include "main/imports.h"
31 #include "main/context.h"
32 #include "main/macros.h"
33 #include "main/mtypes.h"
34 #include "main/light.h"
35 #include "math/m_translate.h"
36 #include "math/m_xform.h"
37 #include "main/state.h"
38 #include "main/viewport.h"
39 #include "util/simple_list.h"
40
41 #include "tnl.h"
42 #include "t_context.h"
43 #include "t_pipeline.h"
44
45 #include "vbo/vbo.h"
46
47 GLboolean
_tnl_CreateContext(struct gl_context * ctx)48 _tnl_CreateContext( struct gl_context *ctx )
49 {
50 TNLcontext *tnl;
51 GLuint i;
52
53 /* Create the TNLcontext structure
54 */
55 ctx->swtnl_context = tnl = calloc(1, sizeof(TNLcontext));
56
57 if (!tnl) {
58 return GL_FALSE;
59 }
60
61 /* Initialize the VB.
62 */
63 tnl->vb.Size = ctx->Const.MaxArrayLockSize + MAX_CLIPPED_VERTICES;
64
65
66 /* Initialize tnl state.
67 */
68 if (ctx->VertexProgram._MaintainTnlProgram) {
69 _tnl_install_pipeline( ctx, _tnl_vp_pipeline );
70 } else {
71 _tnl_install_pipeline( ctx, _tnl_default_pipeline );
72 }
73
74 _math_matrix_ctr(&tnl->_WindowMap);
75
76 tnl->NeedNdcCoords = GL_TRUE;
77 tnl->AllowVertexFog = GL_TRUE;
78 tnl->AllowPixelFog = GL_TRUE;
79
80 /* Set a few default values in the driver struct.
81 */
82 tnl->Driver.Render.PrimTabElts = _tnl_render_tab_elts;
83 tnl->Driver.Render.PrimTabVerts = _tnl_render_tab_verts;
84 tnl->Driver.NotifyMaterialChange = _tnl_validate_shine_tables;
85
86 tnl->nr_blocks = 0;
87
88 /* Lighting miscellaneous */
89 tnl->_ShineTabList = MALLOC_STRUCT( tnl_shine_tab );
90 make_empty_list( tnl->_ShineTabList );
91 /* Allocate 10 (arbitrary) shininess lookup tables */
92 for (i = 0 ; i < 10 ; i++) {
93 struct tnl_shine_tab *s = MALLOC_STRUCT( tnl_shine_tab );
94 s->shininess = -1;
95 s->refcount = 0;
96 insert_at_tail( tnl->_ShineTabList, s );
97 }
98
99 /* plug in the VBO drawing function */
100 vbo_set_draw_func(ctx, _tnl_draw_prims);
101
102 _math_init_transformation();
103 _math_init_translate();
104
105 return GL_TRUE;
106 }
107
108
109 void
_tnl_DestroyContext(struct gl_context * ctx)110 _tnl_DestroyContext( struct gl_context *ctx )
111 {
112 struct tnl_shine_tab *s, *tmps;
113 TNLcontext *tnl = TNL_CONTEXT(ctx);
114
115 _math_matrix_dtr(&tnl->_WindowMap);
116
117 /* Free lighting shininess exponentiation table */
118 foreach_s( s, tmps, tnl->_ShineTabList ) {
119 free( s );
120 }
121 free( tnl->_ShineTabList );
122
123 _tnl_destroy_pipeline( ctx );
124
125 free(tnl);
126 ctx->swtnl_context = NULL;
127 }
128
129
130 void
_tnl_InvalidateState(struct gl_context * ctx,GLuint new_state)131 _tnl_InvalidateState( struct gl_context *ctx, GLuint new_state )
132 {
133 TNLcontext *tnl = TNL_CONTEXT(ctx);
134 const struct gl_program *vp = ctx->VertexProgram._Current;
135 const struct gl_program *fp = ctx->FragmentProgram._Current;
136 GLuint i;
137
138 if (new_state & (_NEW_HINT | _NEW_PROGRAM)) {
139 assert(tnl->AllowVertexFog || tnl->AllowPixelFog);
140 tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
141 || !tnl->AllowPixelFog) && !fp;
142 }
143
144 tnl->pipeline.new_state |= new_state;
145
146 /* Calculate tnl->render_inputs. This bitmask indicates which vertex
147 * attributes need to be emitted to the rasterizer.
148 */
149 tnl->render_inputs_bitset = BITFIELD64_BIT(_TNL_ATTRIB_POS);
150
151 if (!fp || (fp->info.inputs_read & VARYING_BIT_COL0)) {
152 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR0);
153 }
154
155 if (_mesa_need_secondary_color(ctx))
156 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_COLOR1);
157
158 for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
159 if (ctx->Texture._EnabledCoordUnits & (1 << i) ||
160 (fp && fp->info.inputs_read & VARYING_BIT_TEX(i))) {
161 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX(i));
162 }
163 }
164
165 if (ctx->Fog.Enabled
166 || (fp != NULL && (fp->info.inputs_read & VARYING_BIT_FOGC) != 0)) {
167 /* Either fixed-function fog or a fragment program needs fog coord.
168 */
169 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_FOG);
170 }
171
172 if (ctx->Polygon.FrontMode != GL_FILL ||
173 ctx->Polygon.BackMode != GL_FILL)
174 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_EDGEFLAG);
175
176 if (ctx->RenderMode == GL_FEEDBACK)
177 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_TEX0);
178
179 if (ctx->Point._Attenuated || ctx->VertexProgram.PointSizeEnabled)
180 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_POINTSIZE);
181
182 /* check for varying vars which are written by the vertex program */
183 if (vp) {
184 GLuint i;
185 for (i = 0; i < MAX_VARYING; i++) {
186 if (vp->info.outputs_written &
187 BITFIELD64_BIT(VARYING_SLOT_VAR0 + i)) {
188 tnl->render_inputs_bitset |= BITFIELD64_BIT(_TNL_ATTRIB_GENERIC(i));
189 }
190 }
191 }
192
193 if (new_state & (_NEW_VIEWPORT | _NEW_BUFFERS)) {
194 float scale[3], translate[3];
195 _mesa_get_viewport_xform(ctx, 0, scale, translate);
196 _math_matrix_viewport(&tnl->_WindowMap, scale, translate,
197 ctx->DrawBuffer->_DepthMaxF);
198 }
199 }
200
201
202 void
_tnl_wakeup(struct gl_context * ctx)203 _tnl_wakeup( struct gl_context *ctx )
204 {
205 /* Assume we haven't been getting state updates either:
206 */
207 _tnl_InvalidateState( ctx, ~0 );
208
209 #if 0
210 if (ctx->Light.ColorMaterialEnabled) {
211 _mesa_update_color_material( ctx,
212 ctx->Current.Attrib[VERT_ATTRIB_COLOR0] );
213 }
214 #endif
215 }
216
217
218
219
220 /**
221 * Drivers call this function to tell the TCL module whether or not
222 * it wants Normalized Device Coords (NDC) computed. I.e. whether
223 * we should "Divide-by-W". Software renders will want that.
224 */
225 void
_tnl_need_projected_coords(struct gl_context * ctx,GLboolean mode)226 _tnl_need_projected_coords( struct gl_context *ctx, GLboolean mode )
227 {
228 TNLcontext *tnl = TNL_CONTEXT(ctx);
229 tnl->NeedNdcCoords = mode;
230 }
231
232 void
_tnl_allow_vertex_fog(struct gl_context * ctx,GLboolean value)233 _tnl_allow_vertex_fog( struct gl_context *ctx, GLboolean value )
234 {
235 TNLcontext *tnl = TNL_CONTEXT(ctx);
236 tnl->AllowVertexFog = value;
237 tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
238 || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
239
240 }
241
242 void
_tnl_allow_pixel_fog(struct gl_context * ctx,GLboolean value)243 _tnl_allow_pixel_fog( struct gl_context *ctx, GLboolean value )
244 {
245 TNLcontext *tnl = TNL_CONTEXT(ctx);
246 tnl->AllowPixelFog = value;
247 tnl->_DoVertexFog = ((tnl->AllowVertexFog && (ctx->Hint.Fog != GL_NICEST))
248 || !tnl->AllowPixelFog) && !ctx->FragmentProgram._Current;
249 }
250
251