1 /*
2 * Copyright (C) 2009 Francisco Jerez.
3 * All Rights Reserved.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24 *
25 */
26
27 #include "nouveau_driver.h"
28 #include "nouveau_context.h"
29 #include "nouveau_util.h"
30 #include "nv_object.xml.h"
31 #include "nv04_3d.xml.h"
32 #include "nv04_driver.h"
33
34 #define COMBINER_SHIFT(in) \
35 (NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT##in##__SHIFT \
36 - NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT0__SHIFT)
37 #define COMBINER_SOURCE(reg) \
38 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ARGUMENT0_##reg
39 #define COMBINER_INVERT \
40 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_INVERSE0
41 #define COMBINER_ALPHA \
42 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_ALPHA0
43
44 struct combiner_state {
45 struct gl_context *ctx;
46 int unit;
47 GLboolean alpha;
48 GLboolean premodulate;
49
50 /* GL state */
51 GLenum mode;
52 GLenum *source;
53 GLenum *operand;
54 GLuint logscale;
55
56 /* Derived HW state */
57 uint32_t hw;
58 };
59
60 #define __INIT_COMBINER_ALPHA_A GL_TRUE
61 #define __INIT_COMBINER_ALPHA_RGB GL_FALSE
62
63 /* Initialize a combiner_state struct from the texture unit
64 * context. */
65 #define INIT_COMBINER(chan, ctx, rc, i) do { \
66 struct gl_tex_env_combine_state *c = \
67 ctx->Texture.Unit[i]._CurrentCombine; \
68 (rc)->ctx = ctx; \
69 (rc)->unit = i; \
70 (rc)->alpha = __INIT_COMBINER_ALPHA_##chan; \
71 (rc)->premodulate = c->_NumArgs##chan == 4; \
72 (rc)->mode = c->Mode##chan; \
73 (rc)->source = c->Source##chan; \
74 (rc)->operand = c->Operand##chan; \
75 (rc)->logscale = c->ScaleShift##chan; \
76 (rc)->hw = 0; \
77 } while (0)
78
79 /* Get the combiner source for the specified EXT_texture_env_combine
80 * source. */
81 static uint32_t
get_input_source(struct combiner_state * rc,int source)82 get_input_source(struct combiner_state *rc, int source)
83 {
84 switch (source) {
85 case GL_ZERO:
86 return COMBINER_SOURCE(ZERO);
87
88 case GL_TEXTURE:
89 return rc->unit ? COMBINER_SOURCE(TEXTURE1) :
90 COMBINER_SOURCE(TEXTURE0);
91
92 case GL_TEXTURE0:
93 return COMBINER_SOURCE(TEXTURE0);
94
95 case GL_TEXTURE1:
96 return COMBINER_SOURCE(TEXTURE1);
97
98 case GL_CONSTANT:
99 return COMBINER_SOURCE(CONSTANT);
100
101 case GL_PRIMARY_COLOR:
102 return COMBINER_SOURCE(PRIMARY_COLOR);
103
104 case GL_PREVIOUS:
105 return rc->unit ? COMBINER_SOURCE(PREVIOUS) :
106 COMBINER_SOURCE(PRIMARY_COLOR);
107
108 default:
109 assert(0);
110 }
111 }
112
113 /* Get the (possibly inverted) combiner input mapping for the
114 * specified EXT_texture_env_combine operand. */
115 #define INVERT 0x1
116
117 static uint32_t
get_input_mapping(struct combiner_state * rc,int operand,int flags)118 get_input_mapping(struct combiner_state *rc, int operand, int flags)
119 {
120 int map = 0;
121
122 if (!is_color_operand(operand) && !rc->alpha)
123 map |= COMBINER_ALPHA;
124
125 if (is_negative_operand(operand) == !(flags & INVERT))
126 map |= COMBINER_INVERT;
127
128 return map;
129 }
130
131 static uint32_t
get_input_arg(struct combiner_state * rc,int arg,int flags)132 get_input_arg(struct combiner_state *rc, int arg, int flags)
133 {
134 int source = rc->source[arg];
135 int operand = rc->operand[arg];
136
137 /* Fake several unsupported texture formats. */
138 if (is_texture_source(source)) {
139 int i = (source == GL_TEXTURE ?
140 rc->unit : source - GL_TEXTURE0);
141 struct gl_texture_object *t = rc->ctx->Texture.Unit[i]._Current;
142 mesa_format format = t->Image[0][t->BaseLevel]->TexFormat;
143
144 if (format == MESA_FORMAT_A_UNORM8) {
145 /* Emulated using I8. */
146 if (is_color_operand(operand))
147 return COMBINER_SOURCE(ZERO) |
148 get_input_mapping(rc, operand, flags);
149
150 } else if (format == MESA_FORMAT_L_UNORM8) {
151 /* Emulated using I8. */
152 if (!is_color_operand(operand))
153 return COMBINER_SOURCE(ZERO) |
154 get_input_mapping(rc, operand,
155 flags ^ INVERT);
156 }
157 }
158
159 return get_input_source(rc, source) |
160 get_input_mapping(rc, operand, flags);
161 }
162
163 /* Bind the combiner input <in> to the combiner source <src>,
164 * possibly inverted. */
165 #define INPUT_SRC(rc, in, src, flags) \
166 (rc)->hw |= ((flags & INVERT ? COMBINER_INVERT : 0) | \
167 COMBINER_SOURCE(src)) << COMBINER_SHIFT(in)
168
169 /* Bind the combiner input <in> to the EXT_texture_env_combine
170 * argument <arg>, possibly inverted. */
171 #define INPUT_ARG(rc, in, arg, flags) \
172 (rc)->hw |= get_input_arg(rc, arg, flags) << COMBINER_SHIFT(in)
173
174 #define UNSIGNED_OP(rc) \
175 (rc)->hw |= ((rc)->logscale ? \
176 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_SCALE2 : \
177 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_IDENTITY)
178 #define SIGNED_OP(rc) \
179 (rc)->hw |= ((rc)->logscale ? \
180 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_BIAS_SCALE2 : \
181 NV04_MULTITEX_TRIANGLE_COMBINE_COLOR_MAP_BIAS)
182
183 static void
setup_combiner(struct combiner_state * rc)184 setup_combiner(struct combiner_state *rc)
185 {
186 switch (rc->mode) {
187 case GL_REPLACE:
188 INPUT_ARG(rc, 0, 0, 0);
189 INPUT_SRC(rc, 1, ZERO, INVERT);
190 INPUT_SRC(rc, 2, ZERO, 0);
191 INPUT_SRC(rc, 3, ZERO, 0);
192 UNSIGNED_OP(rc);
193 break;
194
195 case GL_MODULATE:
196 INPUT_ARG(rc, 0, 0, 0);
197 INPUT_ARG(rc, 1, 1, 0);
198 INPUT_SRC(rc, 2, ZERO, 0);
199 INPUT_SRC(rc, 3, ZERO, 0);
200 UNSIGNED_OP(rc);
201 break;
202
203 case GL_ADD:
204 case GL_ADD_SIGNED:
205 if (rc->premodulate) {
206 INPUT_ARG(rc, 0, 0, 0);
207 INPUT_ARG(rc, 1, 1, 0);
208 INPUT_ARG(rc, 2, 2, 0);
209 INPUT_ARG(rc, 3, 3, 0);
210 } else {
211 INPUT_ARG(rc, 0, 0, 0);
212 INPUT_SRC(rc, 1, ZERO, INVERT);
213 INPUT_ARG(rc, 2, 1, 0);
214 INPUT_SRC(rc, 3, ZERO, INVERT);
215 }
216
217 if (rc->mode == GL_ADD_SIGNED)
218 SIGNED_OP(rc);
219 else
220 UNSIGNED_OP(rc);
221
222 break;
223
224 case GL_INTERPOLATE:
225 INPUT_ARG(rc, 0, 0, 0);
226 INPUT_ARG(rc, 1, 2, 0);
227 INPUT_ARG(rc, 2, 1, 0);
228 INPUT_ARG(rc, 3, 2, INVERT);
229 UNSIGNED_OP(rc);
230 break;
231
232 default:
233 assert(0);
234 }
235 }
236
237 static unsigned
get_texenv_mode(unsigned mode)238 get_texenv_mode(unsigned mode)
239 {
240 switch (mode) {
241 case GL_REPLACE:
242 return 0x1;
243 case GL_DECAL:
244 return 0x3;
245 case GL_MODULATE:
246 return 0x4;
247 default:
248 assert(0);
249 }
250 }
251
252 void
nv04_emit_tex_env(struct gl_context * ctx,int emit)253 nv04_emit_tex_env(struct gl_context *ctx, int emit)
254 {
255 struct nv04_context *nv04 = to_nv04_context(ctx);
256 const int i = emit - NOUVEAU_STATE_TEX_ENV0;
257 struct combiner_state rc_a = {}, rc_c = {};
258
259 /* Compute the new combiner state. */
260 if (ctx->Texture.Unit[i]._Current) {
261 INIT_COMBINER(A, ctx, &rc_a, i);
262 setup_combiner(&rc_a);
263
264 INIT_COMBINER(RGB, ctx, &rc_c, i);
265 setup_combiner(&rc_c);
266
267 } else {
268 if (i == 0) {
269 INPUT_SRC(&rc_a, 0, PRIMARY_COLOR, 0);
270 INPUT_SRC(&rc_c, 0, PRIMARY_COLOR, 0);
271 } else {
272 INPUT_SRC(&rc_a, 0, PREVIOUS, 0);
273 INPUT_SRC(&rc_c, 0, PREVIOUS, 0);
274 }
275
276 INPUT_SRC(&rc_a, 1, ZERO, INVERT);
277 INPUT_SRC(&rc_c, 1, ZERO, INVERT);
278 INPUT_SRC(&rc_a, 2, ZERO, 0);
279 INPUT_SRC(&rc_c, 2, ZERO, 0);
280 INPUT_SRC(&rc_a, 3, ZERO, 0);
281 INPUT_SRC(&rc_c, 3, ZERO, 0);
282
283 UNSIGNED_OP(&rc_a);
284 UNSIGNED_OP(&rc_c);
285 }
286
287 /* calculate non-multitex state */
288 nv04->blend &= ~NV04_TEXTURED_TRIANGLE_BLEND_TEXTURE_MAP__MASK;
289 if (ctx->Texture._MaxEnabledTexImageUnit != -1)
290 nv04->blend |= get_texenv_mode(ctx->Texture.Unit[0].EnvMode);
291 else
292 nv04->blend |= get_texenv_mode(GL_MODULATE);
293
294 /* update calculated multitex state */
295 nv04->alpha[i] = rc_a.hw;
296 nv04->color[i] = rc_c.hw;
297 nv04->factor = pack_rgba_f(MESA_FORMAT_B8G8R8A8_UNORM,
298 ctx->Texture.Unit[0].EnvColor);
299 }
300