src/mesa/drivers/dri/i915/i915_state.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 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 "glheader.h"
  30 #include "context.h"
  31 #include "macros.h"
  32 #include "enums.h"
  33 #include "dd.h"
  34 #include "tnl/tnl.h"
  35 #include "tnl/t_context.h"
  36
  37 #include "texmem.h"
  38
  39 #include "intel_screen.h"
  40 #include "intel_batchbuffer.h"
  41
  42 #include "i915_context.h"
  43 #include "i915_reg.h"
  44
  45
  46
  47 static void
  48 i915StencilFuncSeparate(GLcontext *ctx, GLenum face, GLenum func, GLint ref,
  49                         GLuint mask)
  50 {
  51    i915ContextPtr i915 = I915_CONTEXT(ctx);
  52    int test = intel_translate_compare_func( func );
  53
  54    mask = mask & 0xff;
  55
  56    if (INTEL_DEBUG&DEBUG_DRI)
  57       fprintf(stderr, "%s : func: %s, ref : 0x%x, mask: 0x%x\n", __FUNCTION__,
  58               _mesa_lookup_enum_by_nr(func), ref, mask);
  59
  60
  61    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
  62    i915->state.Ctx[I915_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_TEST_MASK;
  63    i915->state.Ctx[I915_CTXREG_STATE4] |= (ENABLE_STENCIL_TEST_MASK |
  64                                          STENCIL_TEST_MASK(mask));
  65
  66    i915->state.Ctx[I915_CTXREG_LIS5] &= ~(S5_STENCIL_REF_MASK |
  67                                         S5_STENCIL_TEST_FUNC_MASK);
  68
  69    i915->state.Ctx[I915_CTXREG_LIS5] |= ((ref << S5_STENCIL_REF_SHIFT) |
  70                                        (test << S5_STENCIL_TEST_FUNC_SHIFT));
  71 }
  72
  73 static void
  74 i915StencilMaskSeparate(GLcontext *ctx, GLenum face, GLuint mask)
  75 {
  76    i915ContextPtr i915 = I915_CONTEXT(ctx);
  77
  78    if (INTEL_DEBUG&DEBUG_DRI)
  79       fprintf(stderr, "%s : mask 0x%x\n", __FUNCTION__, mask);
  80
  81    mask = mask & 0xff;
  82
  83    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
  84    i915->state.Ctx[I915_CTXREG_STATE4] &= ~MODE4_ENABLE_STENCIL_WRITE_MASK;
  85    i915->state.Ctx[I915_CTXREG_STATE4] |= (ENABLE_STENCIL_WRITE_MASK |
  86                                         STENCIL_WRITE_MASK(mask));
  87 }
  88
  89
  90 static void
  91 i915StencilOpSeparate(GLcontext *ctx, GLenum face, GLenum fail, GLenum zfail,
  92                       GLenum zpass)
  93 {
  94    i915ContextPtr i915 = I915_CONTEXT(ctx);
  95    int fop = intel_translate_stencil_op(fail);
  96    int dfop = intel_translate_stencil_op(zfail);
  97    int dpop = intel_translate_stencil_op(zpass);
  98
  99
 100    if (INTEL_DEBUG&DEBUG_DRI)
 101       fprintf(stderr, "%s: fail : %s, zfail: %s, zpass : %s\n", __FUNCTION__,
 102               _mesa_lookup_enum_by_nr(fail),
 103               _mesa_lookup_enum_by_nr(zfail),
 104               _mesa_lookup_enum_by_nr(zpass));
 105
 106    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 107
 108    i915->state.Ctx[I915_CTXREG_LIS5] &= ~(S5_STENCIL_FAIL_MASK |
 109                                         S5_STENCIL_PASS_Z_FAIL_MASK |
 110                                         S5_STENCIL_PASS_Z_PASS_MASK);
 111
 112    i915->state.Ctx[I915_CTXREG_LIS5] |= ((fop << S5_STENCIL_FAIL_SHIFT) |
 113                                        (dfop << S5_STENCIL_PASS_Z_FAIL_SHIFT) |
 114                                        (dpop << S5_STENCIL_PASS_Z_PASS_SHIFT));
 115 }
 116
 117 static void i915AlphaFunc(GLcontext *ctx, GLenum func, GLfloat ref)
 118 {
 119    i915ContextPtr i915 = I915_CONTEXT(ctx);
 120    int test = intel_translate_compare_func( func );
 121    GLubyte refByte;
 122
 123    UNCLAMPED_FLOAT_TO_UBYTE(refByte, ref);
 124
 125    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 126    i915->state.Ctx[I915_CTXREG_LIS6] &= ~(S6_ALPHA_TEST_FUNC_MASK |
 127                                         S6_ALPHA_REF_MASK);
 128    i915->state.Ctx[I915_CTXREG_LIS6] |= ((test << S6_ALPHA_TEST_FUNC_SHIFT) |
 129                                        (((GLuint)refByte) << S6_ALPHA_REF_SHIFT));
 130 }
 131
 132 /* This function makes sure that the proper enables are
 133  * set for LogicOp, Independant Alpha Blend, and Blending.
 134  * It needs to be called from numerous places where we
 135  * could change the LogicOp or Independant Alpha Blend without subsequent
 136  * calls to glEnable.
 137  */
 138 static void i915EvalLogicOpBlendState(GLcontext *ctx)
 139 {
 140    i915ContextPtr i915 = I915_CONTEXT(ctx);
 141
 142    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 143
 144    if (RGBA_LOGICOP_ENABLED(ctx)) {
 145       i915->state.Ctx[I915_CTXREG_LIS5] |= S5_LOGICOP_ENABLE;
 146       i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
 147    } else {
 148       i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_LOGICOP_ENABLE;
 149
 150       if (ctx->Color.BlendEnabled) {
 151          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_CBUF_BLEND_ENABLE;
 152       } else {
 153          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_CBUF_BLEND_ENABLE;
 154       }
 155    }
 156 }
 157
 158 static void i915BlendColor(GLcontext *ctx, const GLfloat color[4])
 159 {
 160    i915ContextPtr i915 = I915_CONTEXT(ctx);
 161    GLubyte r, g, b, a;
 162
 163    if (INTEL_DEBUG&DEBUG_DRI)
 164       fprintf(stderr, "%s\n", __FUNCTION__);
 165
 166    UNCLAMPED_FLOAT_TO_UBYTE(r, color[RCOMP]);
 167    UNCLAMPED_FLOAT_TO_UBYTE(g, color[GCOMP]);
 168    UNCLAMPED_FLOAT_TO_UBYTE(b, color[BCOMP]);
 169    UNCLAMPED_FLOAT_TO_UBYTE(a, color[ACOMP]);
 170
 171    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 172    i915->state.Ctx[I915_CTXREG_BLENDCOLOR1] = (a<<24) | (r<<16) | (g<<8) | b;
 173 }
 174
 175
 176 #define DST_BLND_FACT(f) ((f)<<S6_CBUF_DST_BLEND_FACT_SHIFT)
 177 #define SRC_BLND_FACT(f) ((f)<<S6_CBUF_SRC_BLEND_FACT_SHIFT)
 178 #define DST_ABLND_FACT(f) ((f)<<IAB_DST_FACTOR_SHIFT)
 179 #define SRC_ABLND_FACT(f) ((f)<<IAB_SRC_FACTOR_SHIFT)
 180
 181
 182
 183 static GLuint translate_blend_equation( GLenum mode )
 184 {
 185    switch (mode) {
 186    case GL_FUNC_ADD: return BLENDFUNC_ADD;
 187    case GL_MIN: return BLENDFUNC_MIN;
 188    case GL_MAX: return BLENDFUNC_MAX;
 189    case GL_FUNC_SUBTRACT: return BLENDFUNC_SUBTRACT;
 190    case GL_FUNC_REVERSE_SUBTRACT: return BLENDFUNC_REVERSE_SUBTRACT;
 191    default: return 0;
 192    }
 193 }
 194
 195 static void i915UpdateBlendState( GLcontext *ctx )
 196 {
 197    i915ContextPtr i915 = I915_CONTEXT(ctx);
 198    GLuint iab = (i915->state.Ctx[I915_CTXREG_IAB] &
 199                  ~(IAB_SRC_FACTOR_MASK |
 200                    IAB_DST_FACTOR_MASK |
 201                    (BLENDFUNC_MASK << IAB_FUNC_SHIFT) |
 202                    IAB_ENABLE));
 203
 204    GLuint lis6 = (i915->state.Ctx[I915_CTXREG_LIS6] &
 205                   ~(S6_CBUF_SRC_BLEND_FACT_MASK |
 206                     S6_CBUF_DST_BLEND_FACT_MASK |
 207                     S6_CBUF_BLEND_FUNC_MASK));
 208
 209    GLuint eqRGB = ctx->Color.BlendEquationRGB;
 210    GLuint eqA = ctx->Color.BlendEquationA;
 211    GLuint srcRGB = ctx->Color.BlendSrcRGB;
 212    GLuint dstRGB = ctx->Color.BlendDstRGB;
 213    GLuint srcA = ctx->Color.BlendSrcA;
 214    GLuint dstA = ctx->Color.BlendDstA;
 215
 216    if (eqRGB == GL_MIN || eqRGB == GL_MAX) {
 217       srcRGB = dstRGB = GL_ONE;
 218    }
 219
 220    if (eqA == GL_MIN || eqA == GL_MAX) {
 221       srcA = dstA = GL_ONE;
 222    }
 223
 224    lis6 |= SRC_BLND_FACT(intel_translate_blend_factor(srcRGB));
 225    lis6 |= DST_BLND_FACT(intel_translate_blend_factor(dstRGB));
 226    lis6 |= translate_blend_equation( eqRGB ) << S6_CBUF_BLEND_FUNC_SHIFT;
 227
 228    iab |= SRC_ABLND_FACT(intel_translate_blend_factor(srcA));
 229    iab |= DST_ABLND_FACT(intel_translate_blend_factor(dstA));
 230    iab |= translate_blend_equation( eqA ) << IAB_FUNC_SHIFT;
 231
 232    if (srcA != srcRGB || dstA != dstRGB || eqA != eqRGB)
 233       iab |= IAB_ENABLE;
 234
 235    if (iab != i915->state.Ctx[I915_CTXREG_IAB] ||
 236        lis6 != i915->state.Ctx[I915_CTXREG_LIS6]) {
 237       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 238       i915->state.Ctx[I915_CTXREG_IAB] = iab;
 239       i915->state.Ctx[I915_CTXREG_LIS6] = lis6;
 240    }
 241
 242    /* This will catch a logicop blend equation */
 243    i915EvalLogicOpBlendState(ctx);
 244 }
 245
 246
 247 static void i915BlendFuncSeparate(GLcontext *ctx, GLenum srcRGB,
 248                                  GLenum dstRGB, GLenum srcA,
 249                                  GLenum dstA )
 250 {
 251    i915UpdateBlendState( ctx );
 252 }
 253
 254
 255 static void i915BlendEquationSeparate(GLcontext *ctx, GLenum eqRGB,
 256                                      GLenum eqA)
 257 {
 258    i915UpdateBlendState( ctx );
 259 }
 260
 261
 262 static void i915DepthFunc(GLcontext *ctx, GLenum func)
 263 {
 264    i915ContextPtr i915 = I915_CONTEXT(ctx);
 265    int test = intel_translate_compare_func( func );
 266
 267    if (INTEL_DEBUG&DEBUG_DRI)
 268       fprintf(stderr, "%s\n", __FUNCTION__);
 269
 270    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 271    i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_TEST_FUNC_MASK;
 272    i915->state.Ctx[I915_CTXREG_LIS6] |= test << S6_DEPTH_TEST_FUNC_SHIFT;
 273 }
 274
 275 static void i915DepthMask(GLcontext *ctx, GLboolean flag)
 276 {
 277    i915ContextPtr i915 = I915_CONTEXT(ctx);
 278
 279    if (INTEL_DEBUG&DEBUG_DRI)
 280       fprintf(stderr, "%s flag (%d)\n", __FUNCTION__, flag);
 281
 282    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 283
 284    if (flag && ctx->Depth.Test)
 285       i915->state.Ctx[I915_CTXREG_LIS6] |= S6_DEPTH_WRITE_ENABLE;
 286    else
 287       i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_WRITE_ENABLE;
 288 }
 289
 290 /* =============================================================
 291  * Polygon stipple
 292  *
 293  * The i915 supports a 4x4 stipple natively, GL wants 32x32.
 294  * Fortunately stipple is usually a repeating pattern.
 295  */
 296 static void i915PolygonStipple( GLcontext *ctx, const GLubyte *mask )
 297 {
 298    i915ContextPtr i915 = I915_CONTEXT(ctx);
 299    const GLubyte *m = mask;
 300    GLubyte p[4];
 301    int i,j,k;
 302    int active = (ctx->Polygon.StippleFlag &&
 303                  i915->intel.reduced_primitive == GL_TRIANGLES);
 304    GLuint newMask;
 305
 306    if (active) {
 307       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 308       i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 309    }
 310
 311    p[0] = mask[12] & 0xf; p[0] |= p[0] << 4;
 312    p[1] = mask[8] & 0xf; p[1] |= p[1] << 4;
 313    p[2] = mask[4] & 0xf; p[2] |= p[2] << 4;
 314    p[3] = mask[0] & 0xf; p[3] |= p[3] << 4;
 315
 316    for (k = 0 ; k < 8 ; k++)
 317       for (j = 3 ; j >= 0; j--)
 318          for (i = 0 ; i < 4 ; i++, m++)
 319             if (*m != p[j]) {
 320                i915->intel.hw_stipple = 0;
 321                return;
 322             }
 323
 324    newMask = (((p[0] & 0xf) << 0) |
 325               ((p[1] & 0xf) << 4) |
 326               ((p[2] & 0xf) << 8) |
 327               ((p[3] & 0xf) << 12));
 328
 329
 330    if (newMask == 0xffff || newMask == 0x0) {
 331       /* this is needed to make conform pass */
 332       i915->intel.hw_stipple = 0;
 333       return;
 334    }
 335
 336    i915->state.Stipple[I915_STPREG_ST1] &= ~0xffff;
 337    i915->state.Stipple[I915_STPREG_ST1] |= newMask;
 338    i915->intel.hw_stipple = 1;
 339
 340    if (active)
 341       i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 342 }
 343
 344
 345 /* =============================================================
 346  * Hardware clipping
 347  */
 348 static void i915Scissor(GLcontext *ctx, GLint x, GLint y,
 349                         GLsizei w, GLsizei h)
 350 {
 351    i915ContextPtr i915 = I915_CONTEXT(ctx);
 352    intelScreenPrivate *screen = i915->intel.intelScreen;
 353    int x1, y1, x2, y2;
 354
 355    if (!i915->intel.driDrawable)
 356       return;
 357
 358    x1 = x;
 359    y1 = i915->intel.driDrawable->h - (y + h);
 360    x2 = x + w - 1;
 361    y2 = y1 + h - 1;
 362
 363    if (INTEL_DEBUG&DEBUG_DRI)
 364       fprintf(stderr, "[%s] x(%d) y(%d) w(%d) h(%d)\n", __FUNCTION__,
 365               x, y, w, h);
 366
 367    if (x1 < 0) x1 = 0;
 368    if (y1 < 0) y1 = 0;
 369    if (x2 < 0) x2 = 0;
 370    if (y2 < 0) y2 = 0;
 371
 372    if (x2 >= screen->width) x2 = screen->width-1;
 373    if (y2 >= screen->height) y2 = screen->height-1;
 374    if (x1 >= screen->width) x1 = screen->width-1;
 375    if (y1 >= screen->height) y1 = screen->height-1;
 376
 377
 378    I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 379    i915->state.Buffer[I915_DESTREG_SR1] = (y1 << 16) | (x1 & 0xffff);
 380    i915->state.Buffer[I915_DESTREG_SR2] = (y2 << 16) | (x2 & 0xffff);
 381 }
 382
 383 static void i915LogicOp(GLcontext *ctx, GLenum opcode)
 384 {
 385    i915ContextPtr i915 = I915_CONTEXT(ctx);
 386    int tmp = intel_translate_logic_op(opcode);
 387
 388    if (INTEL_DEBUG&DEBUG_DRI)
 389       fprintf(stderr, "%s\n", __FUNCTION__);
 390
 391    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 392    i915->state.Ctx[I915_CTXREG_STATE4] &= ~LOGICOP_MASK;
 393    i915->state.Ctx[I915_CTXREG_STATE4] |= LOGIC_OP_FUNC(tmp);
 394 }
 395
 396
 397
 398 static void i915CullFaceFrontFace(GLcontext *ctx, GLenum unused)
 399 {
 400    i915ContextPtr i915 = I915_CONTEXT(ctx);
 401    GLuint mode;
 402
 403    if (INTEL_DEBUG&DEBUG_DRI)
 404       fprintf(stderr, "%s\n", __FUNCTION__);
 405
 406    if (!ctx->Polygon.CullFlag) {
 407       mode = S4_CULLMODE_NONE;
 408    }
 409    else if (ctx->Polygon.CullFaceMode != GL_FRONT_AND_BACK) {
 410       mode = S4_CULLMODE_CW;
 411
 412       if (ctx->Polygon.CullFaceMode == GL_FRONT)
 413          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 414       if (ctx->Polygon.FrontFace != GL_CCW)
 415          mode ^= (S4_CULLMODE_CW ^ S4_CULLMODE_CCW);
 416    }
 417    else {
 418       mode = S4_CULLMODE_BOTH;
 419    }
 420
 421    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 422    i915->state.Ctx[I915_CTXREG_LIS4] &= ~S4_CULLMODE_MASK;
 423    i915->state.Ctx[I915_CTXREG_LIS4] |= mode;
 424 }
 425
 426 static void i915LineWidth( GLcontext *ctx, GLfloat widthf )
 427 {
 428    i915ContextPtr i915 = I915_CONTEXT( ctx );
 429    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_LINE_WIDTH_MASK;
 430    int width;
 431
 432    if (INTEL_DEBUG&DEBUG_DRI)
 433       fprintf(stderr, "%s\n", __FUNCTION__);
 434
 435    width = (int)(widthf * 2);
 436    CLAMP_SELF(width, 1, 0xf);
 437    lis4 |= width << S4_LINE_WIDTH_SHIFT;
 438
 439    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 440       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 441       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 442    }
 443 }
 444
 445 static void i915PointSize(GLcontext *ctx, GLfloat size)
 446 {
 447    i915ContextPtr i915 = I915_CONTEXT(ctx);
 448    int lis4 = i915->state.Ctx[I915_CTXREG_LIS4] & ~S4_POINT_WIDTH_MASK;
 449    GLint point_size = (int)size;
 450
 451    if (INTEL_DEBUG&DEBUG_DRI)
 452      fprintf(stderr, "%s\n", __FUNCTION__);
 453
 454    CLAMP_SELF(point_size, 1, 255);
 455    lis4 |= point_size << S4_POINT_WIDTH_SHIFT;
 456
 457    if (lis4 != i915->state.Ctx[I915_CTXREG_LIS4]) {
 458       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 459       i915->state.Ctx[I915_CTXREG_LIS4] = lis4;
 460    }
 461 }
 462
 463
 464 /* =============================================================
 465  * Color masks
 466  */
 467
 468 static void i915ColorMask(GLcontext *ctx,
 469                          GLboolean r, GLboolean g,
 470                          GLboolean b, GLboolean a)
 471 {
 472    i915ContextPtr i915 = I915_CONTEXT( ctx );
 473    GLuint tmp = i915->state.Ctx[I915_CTXREG_LIS5] & ~S5_WRITEDISABLE_MASK;
 474
 475    if (INTEL_DEBUG&DEBUG_DRI)
 476       fprintf(stderr, "%s r(%d) g(%d) b(%d) a(%d)\n", __FUNCTION__, r, g, b, a);
 477
 478    if (!r) tmp |= S5_WRITEDISABLE_RED;
 479    if (!g) tmp |= S5_WRITEDISABLE_GREEN;
 480    if (!b) tmp |= S5_WRITEDISABLE_BLUE;
 481    if (!a) tmp |= S5_WRITEDISABLE_ALPHA;
 482
 483    if (tmp != i915->state.Ctx[I915_CTXREG_LIS5]) {
 484       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 485       i915->state.Ctx[I915_CTXREG_LIS5] = tmp;
 486    }
 487 }
 488
 489 static void update_specular( GLcontext *ctx )
 490 {
 491    /* A hack to trigger the rebuild of the fragment program.
 492     */
 493    INTEL_CONTEXT(ctx)->NewGLState |= _NEW_TEXTURE;
 494    I915_CONTEXT(ctx)->tex_program.translated = 0;
 495 }
 496
 497 static void i915LightModelfv(GLcontext *ctx, GLenum pname,
 498                              const GLfloat *param)
 499 {
 500    if (INTEL_DEBUG&DEBUG_DRI)
 501       fprintf(stderr, "%s\n", __FUNCTION__);
 502
 503    if (pname == GL_LIGHT_MODEL_COLOR_CONTROL) {
 504       update_specular( ctx );
 505    }
 506 }
 507
 508 static void i915ShadeModel(GLcontext *ctx, GLenum mode)
 509 {
 510    i915ContextPtr i915 = I915_CONTEXT(ctx);
 511    I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 512
 513    if (mode == GL_SMOOTH) {
 514      i915->state.Ctx[I915_CTXREG_LIS4] &= ~(S4_FLATSHADE_ALPHA |
 515                                           S4_FLATSHADE_COLOR |
 516                                           S4_FLATSHADE_SPECULAR);
 517    } else {
 518      i915->state.Ctx[I915_CTXREG_LIS4] |= (S4_FLATSHADE_ALPHA |
 519                                          S4_FLATSHADE_COLOR |
 520                                          S4_FLATSHADE_SPECULAR);
 521    }
 522 }
 523
 524 /* =============================================================
 525  * Fog
 526  */
 527 void i915_update_fog( GLcontext *ctx )
 528 {
 529    i915ContextPtr i915 = I915_CONTEXT(ctx);
 530    GLenum mode;
 531    GLboolean enabled;
 532    GLboolean try_pixel_fog;
 533
 534    if (ctx->FragmentProgram._Active) {
 535       /* Pull in static fog state from program */
 536
 537       mode = ctx->FragmentProgram._Current->FogOption;
 538       enabled = (mode != GL_NONE);
 539       try_pixel_fog = 0;
 540    }
 541    else {
 542       enabled = ctx->Fog.Enabled;
 543       mode = ctx->Fog.Mode;
 544
 545       try_pixel_fog = (ctx->Fog.FogCoordinateSource == GL_FRAGMENT_DEPTH_EXT &&
 546                        ctx->Hint.Fog == GL_NICEST &&
 547                        0);      /* XXX - DISABLE -- Need ortho fallback */
 548    }
 549
 550    if (!enabled) {
 551       i915->vertex_fog = I915_FOG_NONE;
 552    }
 553    else if (try_pixel_fog) {
 554
 555       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 556       i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
 557       i915->vertex_fog = I915_FOG_PIXEL;
 558
 559       switch (mode) {
 560       case GL_LINEAR:
 561          if (ctx->Fog.End <= ctx->Fog.Start) {
 562             /* XXX - this won't work with fragment programs.  Need to
 563              * either fallback or append fog instructions to end of
 564              * program in the case of linear fog.
 565              */
 566             i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
 567             i915->vertex_fog = I915_FOG_VERTEX;
 568          }
 569          else {
 570             GLfloat c1 = ctx->Fog.End/(ctx->Fog.End-ctx->Fog.Start);
 571             GLfloat c2 = 1.0/(ctx->Fog.End-ctx->Fog.Start);
 572
 573             i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_C1_MASK;
 574             i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_LINEAR;
 575             i915->state.Fog[I915_FOGREG_MODE1] |=
 576                ((GLuint)(c1 * FMC1_C1_ONE)) & FMC1_C1_MASK;
 577
 578             if (i915->state.Fog[I915_FOGREG_MODE1] & FMC1_FOGINDEX_Z) {
 579                i915->state.Fog[I915_FOGREG_MODE2] = (GLuint)(c2 * FMC2_C2_ONE);
 580             }
 581             else {
 582                union { float f; int i; } fi;
 583                fi.f = c2;
 584                i915->state.Fog[I915_FOGREG_MODE2] = fi.i;
 585             }
 586          }
 587          break;
 588       case GL_EXP:
 589          i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP;
 590          break;
 591       case GL_EXP2:
 592          i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_PIXEL_EXP2;
 593          break;
 594       default:
 595          break;
 596       }
 597    }
 598    else /* if (i915->vertex_fog != I915_FOG_VERTEX) */ {
 599       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 600       i915->state.Fog[I915_FOGREG_MODE1] &= ~FMC1_FOGFUNC_MASK;
 601       i915->state.Fog[I915_FOGREG_MODE1] |= FMC1_FOGFUNC_VERTEX;
 602       i915->vertex_fog = I915_FOG_VERTEX;
 603    }
 604
 605    {
 606       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 607       I915_ACTIVESTATE(i915, I915_UPLOAD_FOG, enabled);
 608       if (enabled)
 609          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_FOG_ENABLE;
 610       else
 611          i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_FOG_ENABLE;
 612    }
 613
 614    /* always enbale pixel fog
 615     * vertex fog use precaculted fog coord will conflict with appended
 616     * fog program
 617     */
 618     _tnl_allow_vertex_fog( ctx, 0 );
 619     _tnl_allow_pixel_fog( ctx, 1 );
 620 }
 621
 622 static void i915Fogfv(GLcontext *ctx, GLenum pname, const GLfloat *param)
 623 {
 624    i915ContextPtr i915 = I915_CONTEXT(ctx);
 625
 626    switch (pname) {
 627    case GL_FOG_COORDINATE_SOURCE_EXT:
 628    case GL_FOG_MODE:
 629    case GL_FOG_START:
 630    case GL_FOG_END:
 631       break;
 632
 633    case GL_FOG_DENSITY:
 634       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 635
 636       if (i915->state.Fog[I915_FOGREG_MODE1] & FMC1_FOGINDEX_Z) {
 637          i915->state.Fog[I915_FOGREG_MODE3] = (GLuint)(ctx->Fog.Density *
 638                                                      FMC3_D_ONE);
 639       }
 640       else {
 641          union { float f; int i; } fi;
 642          fi.f = ctx->Fog.Density;
 643          i915->state.Fog[I915_FOGREG_MODE3] = fi.i;
 644       }
 645       break;
 646
 647    case GL_FOG_COLOR:
 648       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 649       i915->state.Fog[I915_FOGREG_COLOR] =
 650          (_3DSTATE_FOG_COLOR_CMD |
 651           ((GLubyte)(ctx->Fog.Color[0]*255.0F) << 16) |
 652           ((GLubyte)(ctx->Fog.Color[1]*255.0F) << 8) |
 653           ((GLubyte)(ctx->Fog.Color[2]*255.0F) << 0));
 654       break;
 655
 656    default:
 657       break;
 658    }
 659 }
 660
 661 static void i915Hint(GLcontext *ctx, GLenum target, GLenum state)
 662 {
 663    switch (target) {
 664    case GL_FOG_HINT:
 665       break;
 666    default:
 667       break;
 668    }
 669 }
 670
 671 /* =============================================================
 672  */
 673
 674 static void i915Enable(GLcontext *ctx, GLenum cap, GLboolean state)
 675 {
 676    i915ContextPtr i915 = I915_CONTEXT(ctx);
 677
 678    switch(cap) {
 679    case GL_TEXTURE_2D:
 680       break;
 681
 682    case GL_LIGHTING:
 683    case GL_COLOR_SUM:
 684       update_specular( ctx );
 685       break;
 686
 687    case GL_ALPHA_TEST:
 688       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 689       if (state)
 690          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_ALPHA_TEST_ENABLE;
 691       else
 692          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_ALPHA_TEST_ENABLE;
 693       break;
 694
 695    case GL_BLEND:
 696       i915EvalLogicOpBlendState(ctx);
 697       break;
 698
 699    case GL_COLOR_LOGIC_OP:
 700       i915EvalLogicOpBlendState(ctx);
 701
 702       /* Logicop doesn't seem to work at 16bpp:
 703        */
 704       if (i915->intel.intelScreen->cpp == 2)
 705          FALLBACK( &i915->intel, I915_FALLBACK_LOGICOP, state );
 706       break;
 707
 708    case GL_FRAGMENT_PROGRAM_ARB:
 709       break;
 710
 711    case GL_DITHER:
 712       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 713       if (state)
 714          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_COLOR_DITHER_ENABLE;
 715       else
 716          i915->state.Ctx[I915_CTXREG_LIS5] &= ~S5_COLOR_DITHER_ENABLE;
 717       break;
 718
 719    case GL_DEPTH_TEST:
 720       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 721       if (state)
 722          i915->state.Ctx[I915_CTXREG_LIS6] |= S6_DEPTH_TEST_ENABLE;
 723       else
 724          i915->state.Ctx[I915_CTXREG_LIS6] &= ~S6_DEPTH_TEST_ENABLE;
 725
 726       i915DepthMask( ctx, ctx->Depth.Mask );
 727       break;
 728
 729    case GL_SCISSOR_TEST:
 730       I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 731       if (state)
 732          i915->state.Buffer[I915_DESTREG_SENABLE] = (_3DSTATE_SCISSOR_ENABLE_CMD |
 733                                                    ENABLE_SCISSOR_RECT);
 734       else
 735          i915->state.Buffer[I915_DESTREG_SENABLE] = (_3DSTATE_SCISSOR_ENABLE_CMD |
 736                                                    DISABLE_SCISSOR_RECT);
 737       break;
 738
 739    case GL_LINE_SMOOTH:
 740       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 741       if (state)
 742          i915->state.Ctx[I915_CTXREG_LIS4] |= S4_LINE_ANTIALIAS_ENABLE;
 743       else
 744          i915->state.Ctx[I915_CTXREG_LIS4] &= ~S4_LINE_ANTIALIAS_ENABLE;
 745       break;
 746
 747    case GL_FOG:
 748       break;
 749
 750    case GL_CULL_FACE:
 751       i915CullFaceFrontFace(ctx, 0);
 752       break;
 753
 754    case GL_STENCIL_TEST:
 755       if (i915->intel.hw_stencil) {
 756          I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 757          if (state)
 758             i915->state.Ctx[I915_CTXREG_LIS5] |= (S5_STENCIL_TEST_ENABLE |
 759                                                 S5_STENCIL_WRITE_ENABLE);
 760          else
 761             i915->state.Ctx[I915_CTXREG_LIS5] &= ~(S5_STENCIL_TEST_ENABLE |
 762                                                  S5_STENCIL_WRITE_ENABLE);
 763       } else {
 764          FALLBACK( &i915->intel, I915_FALLBACK_STENCIL, state );
 765       }
 766       break;
 767
 768    case GL_POLYGON_STIPPLE:
 769       /* The stipple command worked on my 855GM box, but not my 845G.
 770        * I'll do more testing later to find out exactly which hardware
 771        * supports it.  Disabled for now.
 772        */
 773       if (i915->intel.hw_stipple &&
 774           i915->intel.reduced_primitive == GL_TRIANGLES)
 775       {
 776          I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 777          if (state)
 778             i915->state.Stipple[I915_STPREG_ST1] |= ST1_ENABLE;
 779          else
 780             i915->state.Stipple[I915_STPREG_ST1] &= ~ST1_ENABLE;
 781       }
 782       break;
 783
 784    case GL_POLYGON_SMOOTH:
 785       FALLBACK( &i915->intel, I915_FALLBACK_POLYGON_SMOOTH, state );
 786       break;
 787
 788    case GL_POINT_SMOOTH:
 789       FALLBACK( &i915->intel, I915_FALLBACK_POINT_SMOOTH, state );
 790       break;
 791
 792    default:
 793       ;
 794    }
 795 }
 796
 797
 798 static void i915_init_packets( i915ContextPtr i915 )
 799 {
 800    intelScreenPrivate *screen = i915->intel.intelScreen;
 801
 802    /* Zero all state */
 803    memset(&i915->state, 0, sizeof(i915->state));
 804
 805
 806    {
 807       I915_STATECHANGE(i915, I915_UPLOAD_CTX);
 808       /* Probably don't want to upload all this stuff every time one
 809        * piece changes.
 810        */
 811       i915->state.Ctx[I915_CTXREG_LI] = (_3DSTATE_LOAD_STATE_IMMEDIATE_1 |
 812                                        I1_LOAD_S(2) |
 813                                        I1_LOAD_S(4) |
 814                                        I1_LOAD_S(5) |
 815                                        I1_LOAD_S(6) |
 816                                        (3));
 817       i915->state.Ctx[I915_CTXREG_LIS2] = 0;
 818       i915->state.Ctx[I915_CTXREG_LIS4] = 0;
 819       i915->state.Ctx[I915_CTXREG_LIS5] = 0;
 820
 821       if (screen->cpp == 2)
 822          i915->state.Ctx[I915_CTXREG_LIS5] |= S5_COLOR_DITHER_ENABLE;
 823
 824
 825       i915->state.Ctx[I915_CTXREG_LIS6] = (S6_COLOR_WRITE_ENABLE |
 826                                          (2 << S6_TRISTRIP_PV_SHIFT));
 827
 828       i915->state.Ctx[I915_CTXREG_STATE4] = (_3DSTATE_MODES_4_CMD |
 829                                            ENABLE_LOGIC_OP_FUNC |
 830                                            LOGIC_OP_FUNC(LOGICOP_COPY) |
 831                                            ENABLE_STENCIL_TEST_MASK |
 832                                            STENCIL_TEST_MASK(0xff) |
 833                                            ENABLE_STENCIL_WRITE_MASK |
 834                                            STENCIL_WRITE_MASK(0xff));
 835
 836
 837       i915->state.Ctx[I915_CTXREG_IAB] = (_3DSTATE_INDEPENDENT_ALPHA_BLEND_CMD |
 838                                         IAB_MODIFY_ENABLE |
 839                                         IAB_MODIFY_FUNC |
 840                                         IAB_MODIFY_SRC_FACTOR |
 841                                         IAB_MODIFY_DST_FACTOR);
 842
 843       i915->state.Ctx[I915_CTXREG_BLENDCOLOR0] = _3DSTATE_CONST_BLEND_COLOR_CMD;
 844       i915->state.Ctx[I915_CTXREG_BLENDCOLOR1] = 0;
 845
 846    }
 847
 848    {
 849       I915_STATECHANGE(i915, I915_UPLOAD_STIPPLE);
 850       i915->state.Stipple[I915_STPREG_ST0] = _3DSTATE_STIPPLE;
 851    }
 852
 853
 854    {
 855       I915_STATECHANGE(i915, I915_UPLOAD_FOG);
 856       i915->state.Fog[I915_FOGREG_MODE0] = _3DSTATE_FOG_MODE_CMD;
 857       i915->state.Fog[I915_FOGREG_MODE1] = (FMC1_FOGFUNC_MODIFY_ENABLE |
 858                                           FMC1_FOGFUNC_VERTEX |
 859                                           FMC1_FOGINDEX_MODIFY_ENABLE |
 860                                           FMC1_FOGINDEX_W |
 861                                           FMC1_C1_C2_MODIFY_ENABLE |
 862                                           FMC1_DENSITY_MODIFY_ENABLE);
 863       i915->state.Fog[I915_FOGREG_COLOR] = _3DSTATE_FOG_COLOR_CMD;
 864    }
 865
 866
 867    {
 868       I915_STATECHANGE(i915, I915_UPLOAD_BUFFERS);
 869       /* color buffer offset/stride */
 870       i915->state.Buffer[I915_DESTREG_CBUFADDR0] = _3DSTATE_BUF_INFO_CMD;
 871       i915->state.Buffer[I915_DESTREG_CBUFADDR1] =
 872          (BUF_3D_ID_COLOR_BACK |
 873           BUF_3D_PITCH(screen->front.pitch) |  /* pitch in bytes */
 874           BUF_3D_USE_FENCE);
 875       /*i915->state.Buffer[I915_DESTREG_CBUFADDR2] is the offset */
 876
 877
 878       /* depth/Z buffer offset/stride */
 879       i915->state.Buffer[I915_DESTREG_DBUFADDR0] = _3DSTATE_BUF_INFO_CMD;
 880       i915->state.Buffer[I915_DESTREG_DBUFADDR1] =
 881          (BUF_3D_ID_DEPTH |
 882           BUF_3D_PITCH(screen->depth.pitch) |  /* pitch in bytes */
 883           BUF_3D_USE_FENCE);
 884       i915->state.Buffer[I915_DESTREG_DBUFADDR2] = screen->depth.offset;
 885
 886
 887       i915->state.Buffer[I915_DESTREG_DV0] = _3DSTATE_DST_BUF_VARS_CMD;
 888
 889       /* color/depth pixel format */
 890       switch (screen->fbFormat) {
 891       case DV_PF_555:
 892       case DV_PF_565:
 893          i915->state.Buffer[I915_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
 894                                                DSTORG_VERT_BIAS(0x8) | /* .5 */
 895                                                LOD_PRECLAMP_OGL |
 896                                                TEX_DEFAULT_COLOR_OGL |
 897                                                DITHER_FULL_ALWAYS |
 898                                                screen->fbFormat |
 899                                                DEPTH_FRMT_16_FIXED);
 900          break;
 901       case DV_PF_8888:
 902          i915->state.Buffer[I915_DESTREG_DV1] = (DSTORG_HORT_BIAS(0x8) | /* .5 */
 903                                                DSTORG_VERT_BIAS(0x8) | /* .5 */
 904                                                LOD_PRECLAMP_OGL |
 905                                                TEX_DEFAULT_COLOR_OGL |
 906                                                screen->fbFormat |
 907                                                DEPTH_FRMT_24_FIXED_8_OTHER);
 908          break;
 909       }
 910
 911       /* scissor */
 912       i915->state.Buffer[I915_DESTREG_SENABLE] = (_3DSTATE_SCISSOR_ENABLE_CMD |
 913                                                 DISABLE_SCISSOR_RECT);
 914       i915->state.Buffer[I915_DESTREG_SR0] = _3DSTATE_SCISSOR_RECT_0_CMD;
 915       i915->state.Buffer[I915_DESTREG_SR1] = 0;
 916       i915->state.Buffer[I915_DESTREG_SR2] = 0;
 917    }
 918
 919
 920    /* These will be emitted every at the head of every buffer, unless
 921     * we get hardware contexts working.
 922     */
 923    i915->state.active = (I915_UPLOAD_PROGRAM |
 924                          I915_UPLOAD_STIPPLE |
 925                          I915_UPLOAD_CTX |
 926                          I915_UPLOAD_BUFFERS |
 927                          I915_UPLOAD_INVARIENT);
 928 }
 929
 930 void i915InitStateFunctions( struct dd_function_table *functions )
 931 {
 932    functions->AlphaFunc = i915AlphaFunc;
 933    functions->BlendColor = i915BlendColor;
 934    functions->BlendEquationSeparate = i915BlendEquationSeparate;
 935    functions->BlendFuncSeparate = i915BlendFuncSeparate;
 936    functions->ColorMask = i915ColorMask;
 937    functions->CullFace = i915CullFaceFrontFace;
 938    functions->DepthFunc = i915DepthFunc;
 939    functions->DepthMask = i915DepthMask;
 940    functions->Enable = i915Enable;
 941    functions->Fogfv = i915Fogfv;
 942    functions->FrontFace = i915CullFaceFrontFace;
 943    functions->Hint = i915Hint;
 944    functions->LightModelfv = i915LightModelfv;
 945    functions->LineWidth = i915LineWidth;
 946    functions->LogicOpcode = i915LogicOp;
 947    functions->PointSize = i915PointSize;
 948    functions->PolygonStipple = i915PolygonStipple;
 949    functions->Scissor = i915Scissor;
 950    functions->ShadeModel = i915ShadeModel;
 951    functions->StencilFuncSeparate = i915StencilFuncSeparate;
 952    functions->StencilMaskSeparate = i915StencilMaskSeparate;
 953    functions->StencilOpSeparate = i915StencilOpSeparate;
 954 }
 955
 956
 957 void i915InitState( i915ContextPtr i915 )
 958 {
 959    GLcontext *ctx = &i915->intel.ctx;
 960
 961    i915_init_packets( i915 );
 962
 963    intelInitState( ctx );
 964
 965    memcpy( &i915->initial, &i915->state, sizeof(i915->state) );
 966    i915->current = &i915->state;
 967 }
 968
 969
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 974