src/mesa/drivers/dri/i915/intel_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 "main/glheader.h"
  30 #include "main/context.h"
  31 #include "main/macros.h"
  32 #include "main/enums.h"
  33 #include "main/colormac.h"
  34 #include "main/dd.h"
  35
  36 #include "intel_screen.h"
  37 #include "intel_context.h"
  38 #include "intel_fbo.h"
  39 #include "intel_regions.h"
  40 #include "swrast/swrast.h"
  41
  42 int
  43 intel_translate_shadow_compare_func( GLenum func )
  44 {
  45    switch(func) {
  46    case GL_NEVER:
  47        return COMPAREFUNC_ALWAYS;
  48    case GL_LESS:
  49        return COMPAREFUNC_LEQUAL;
  50    case GL_LEQUAL:
  51        return COMPAREFUNC_LESS;
  52    case GL_GREATER:
  53        return COMPAREFUNC_GEQUAL;
  54    case GL_GEQUAL:
  55       return COMPAREFUNC_GREATER;
  56    case GL_NOTEQUAL:
  57       return COMPAREFUNC_EQUAL;
  58    case GL_EQUAL:
  59       return COMPAREFUNC_NOTEQUAL;
  60    case GL_ALWAYS:
  61        return COMPAREFUNC_NEVER;
  62    }
  63
  64    fprintf(stderr, "Unknown value in %s: %x\n", __FUNCTION__, func);
  65    return COMPAREFUNC_NEVER;
  66 }
  67
  68 int
  69 intel_translate_compare_func(GLenum func)
  70 {
  71    switch (func) {
  72    case GL_NEVER:
  73       return COMPAREFUNC_NEVER;
  74    case GL_LESS:
  75       return COMPAREFUNC_LESS;
  76    case GL_LEQUAL:
  77       return COMPAREFUNC_LEQUAL;
  78    case GL_GREATER:
  79       return COMPAREFUNC_GREATER;
  80    case GL_GEQUAL:
  81       return COMPAREFUNC_GEQUAL;
  82    case GL_NOTEQUAL:
  83       return COMPAREFUNC_NOTEQUAL;
  84    case GL_EQUAL:
  85       return COMPAREFUNC_EQUAL;
  86    case GL_ALWAYS:
  87       return COMPAREFUNC_ALWAYS;
  88    }
  89
  90    fprintf(stderr, "Unknown value in %s: %x\n", __FUNCTION__, func);
  91    return COMPAREFUNC_ALWAYS;
  92 }
  93
  94 int
  95 intel_translate_stencil_op(GLenum op)
  96 {
  97    switch (op) {
  98    case GL_KEEP:
  99       return STENCILOP_KEEP;
 100    case GL_ZERO:
 101       return STENCILOP_ZERO;
 102    case GL_REPLACE:
 103       return STENCILOP_REPLACE;
 104    case GL_INCR:
 105       return STENCILOP_INCRSAT;
 106    case GL_DECR:
 107       return STENCILOP_DECRSAT;
 108    case GL_INCR_WRAP:
 109       return STENCILOP_INCR;
 110    case GL_DECR_WRAP:
 111       return STENCILOP_DECR;
 112    case GL_INVERT:
 113       return STENCILOP_INVERT;
 114    default:
 115       return STENCILOP_ZERO;
 116    }
 117 }
 118
 119 int
 120 intel_translate_blend_factor(GLenum factor)
 121 {
 122    switch (factor) {
 123    case GL_ZERO:
 124       return BLENDFACT_ZERO;
 125    case GL_SRC_ALPHA:
 126       return BLENDFACT_SRC_ALPHA;
 127    case GL_ONE:
 128       return BLENDFACT_ONE;
 129    case GL_SRC_COLOR:
 130       return BLENDFACT_SRC_COLR;
 131    case GL_ONE_MINUS_SRC_COLOR:
 132       return BLENDFACT_INV_SRC_COLR;
 133    case GL_DST_COLOR:
 134       return BLENDFACT_DST_COLR;
 135    case GL_ONE_MINUS_DST_COLOR:
 136       return BLENDFACT_INV_DST_COLR;
 137    case GL_ONE_MINUS_SRC_ALPHA:
 138       return BLENDFACT_INV_SRC_ALPHA;
 139    case GL_DST_ALPHA:
 140       return BLENDFACT_DST_ALPHA;
 141    case GL_ONE_MINUS_DST_ALPHA:
 142       return BLENDFACT_INV_DST_ALPHA;
 143    case GL_SRC_ALPHA_SATURATE:
 144       return BLENDFACT_SRC_ALPHA_SATURATE;
 145    case GL_CONSTANT_COLOR:
 146       return BLENDFACT_CONST_COLOR;
 147    case GL_ONE_MINUS_CONSTANT_COLOR:
 148       return BLENDFACT_INV_CONST_COLOR;
 149    case GL_CONSTANT_ALPHA:
 150       return BLENDFACT_CONST_ALPHA;
 151    case GL_ONE_MINUS_CONSTANT_ALPHA:
 152       return BLENDFACT_INV_CONST_ALPHA;
 153    }
 154
 155    fprintf(stderr, "Unknown value in %s: %x\n", __FUNCTION__, factor);
 156    return BLENDFACT_ZERO;
 157 }
 158
 159 int
 160 intel_translate_logic_op(GLenum opcode)
 161 {
 162    switch (opcode) {
 163    case GL_CLEAR:
 164       return LOGICOP_CLEAR;
 165    case GL_AND:
 166       return LOGICOP_AND;
 167    case GL_AND_REVERSE:
 168       return LOGICOP_AND_RVRSE;
 169    case GL_COPY:
 170       return LOGICOP_COPY;
 171    case GL_COPY_INVERTED:
 172       return LOGICOP_COPY_INV;
 173    case GL_AND_INVERTED:
 174       return LOGICOP_AND_INV;
 175    case GL_NOOP:
 176       return LOGICOP_NOOP;
 177    case GL_XOR:
 178       return LOGICOP_XOR;
 179    case GL_OR:
 180       return LOGICOP_OR;
 181    case GL_OR_INVERTED:
 182       return LOGICOP_OR_INV;
 183    case GL_NOR:
 184       return LOGICOP_NOR;
 185    case GL_EQUIV:
 186       return LOGICOP_EQUIV;
 187    case GL_INVERT:
 188       return LOGICOP_INV;
 189    case GL_OR_REVERSE:
 190       return LOGICOP_OR_RVRSE;
 191    case GL_NAND:
 192       return LOGICOP_NAND;
 193    case GL_SET:
 194       return LOGICOP_SET;
 195    default:
 196       return LOGICOP_SET;
 197    }
 198 }
 199
 200
 201 static void
 202 intelClearColor(GLcontext * ctx, const GLfloat color[4])
 203 {
 204    struct intel_context *intel = intel_context(ctx);
 205    GLubyte clear[4];
 206
 207    CLAMPED_FLOAT_TO_UBYTE(clear[0], color[0]);
 208    CLAMPED_FLOAT_TO_UBYTE(clear[1], color[1]);
 209    CLAMPED_FLOAT_TO_UBYTE(clear[2], color[2]);
 210    CLAMPED_FLOAT_TO_UBYTE(clear[3], color[3]);
 211
 212    /* compute both 32 and 16-bit clear values */
 213    intel->ClearColor8888 = INTEL_PACKCOLOR8888(clear[0], clear[1],
 214                                                clear[2], clear[3]);
 215    intel->ClearColor565 = INTEL_PACKCOLOR565(clear[0], clear[1], clear[2]);
 216 }
 217
 218
 219 /**
 220  * Update the viewport transformation matrix.  Depends on:
 221  *  - viewport pos/size
 222  *  - depthrange
 223  *  - window pos/size or FBO size
 224  */
 225 static void
 226 intelCalcViewport(GLcontext * ctx)
 227 {
 228    struct intel_context *intel = intel_context(ctx);
 229    const GLfloat *v = ctx->Viewport._WindowMap.m;
 230    const GLfloat depthScale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
 231    GLfloat *m = intel->ViewportMatrix.m;
 232    GLfloat yScale, yBias;
 233
 234    if (ctx->DrawBuffer->Name) {
 235       /* User created FBO */
 236       struct intel_renderbuffer *irb
 237          = intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0]);
 238       if (irb && !irb->RenderToTexture) {
 239          /* y=0=top */
 240          yScale = -1.0;
 241          yBias = irb->Base.Height;
 242       }
 243       else {
 244          /* y=0=bottom */
 245          yScale = 1.0;
 246          yBias = 0.0;
 247       }
 248    }
 249    else {
 250       /* window buffer, y=0=top */
 251       yScale = -1.0;
 252       yBias = (intel->driDrawable) ? intel->driDrawable->h : 0.0F;
 253    }
 254
 255    m[MAT_SX] = v[MAT_SX];
 256    m[MAT_TX] = v[MAT_TX];
 257
 258    m[MAT_SY] = v[MAT_SY] * yScale;
 259    m[MAT_TY] = v[MAT_TY] * yScale + yBias;
 260
 261    m[MAT_SZ] = v[MAT_SZ] * depthScale;
 262    m[MAT_TZ] = v[MAT_TZ] * depthScale;
 263 }
 264
 265 static void
 266 intelViewport(GLcontext * ctx,
 267               GLint x, GLint y, GLsizei width, GLsizei height)
 268 {
 269    intelCalcViewport(ctx);
 270
 271    intel_viewport(ctx, x, y, width, height);
 272 }
 273
 274 static void
 275 intelDepthRange(GLcontext * ctx, GLclampd nearval, GLclampd farval)
 276 {
 277    intelCalcViewport(ctx);
 278 }
 279
 280 /* Fallback to swrast for select and feedback.
 281  */
 282 static void
 283 intelRenderMode(GLcontext * ctx, GLenum mode)
 284 {
 285    struct intel_context *intel = intel_context(ctx);
 286    FALLBACK(intel, INTEL_FALLBACK_RENDERMODE, (mode != GL_RENDER));
 287 }
 288
 289
 290 void
 291 intelInitStateFuncs(struct dd_function_table *functions)
 292 {
 293    functions->RenderMode = intelRenderMode;
 294    functions->Viewport = intelViewport;
 295    functions->DepthRange = intelDepthRange;
 296    functions->ClearColor = intelClearColor;
 297 }