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 44struct 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. */ 81static uint32_t 82get_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 117static uint32_t 118get_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 131static uint32_t 132get_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 gl_format format = t->Image[0][t->BaseLevel]->TexFormat; 143 144 if (format == MESA_FORMAT_A8) { 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_L8) { 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 183static void 184setup_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 237static unsigned 238get_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 252void 253nv04_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]._ReallyEnabled) { 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._EnabledUnits) 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_ARGB8888, 298 ctx->Texture.Unit[0].EnvColor); 299} 300