src/mesa/drivers/dri/i915tex/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 "glheader.h"
  30 #include "context.h"
  31 #include "macros.h"
  32 #include "enums.h"
  33 #include "colormac.h"
  34 #include "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_compare_func(GLenum func)
  44 {
  45    switch (func) {
  46    case GL_NEVER:
  47       return COMPAREFUNC_NEVER;
  48    case GL_LESS:
  49       return COMPAREFUNC_LESS;
  50    case GL_LEQUAL:
  51       return COMPAREFUNC_LEQUAL;
  52    case GL_GREATER:
  53       return COMPAREFUNC_GREATER;
  54    case GL_GEQUAL:
  55       return COMPAREFUNC_GEQUAL;
  56    case GL_NOTEQUAL:
  57       return COMPAREFUNC_NOTEQUAL;
  58    case GL_EQUAL:
  59       return COMPAREFUNC_EQUAL;
  60    case GL_ALWAYS:
  61       return COMPAREFUNC_ALWAYS;
  62    }
  63
  64    fprintf(stderr, "Unknown value in %s: %x\n", __FUNCTION__, func);
  65    return COMPAREFUNC_ALWAYS;
  66 }
  67
  68 int
  69 intel_translate_stencil_op(GLenum op)
  70 {
  71    switch (op) {
  72    case GL_KEEP:
  73       return STENCILOP_KEEP;
  74    case GL_ZERO:
  75       return STENCILOP_ZERO;
  76    case GL_REPLACE:
  77       return STENCILOP_REPLACE;
  78    case GL_INCR:
  79       return STENCILOP_INCRSAT;
  80    case GL_DECR:
  81       return STENCILOP_DECRSAT;
  82    case GL_INCR_WRAP:
  83       return STENCILOP_INCR;
  84    case GL_DECR_WRAP:
  85       return STENCILOP_DECR;
  86    case GL_INVERT:
  87       return STENCILOP_INVERT;
  88    default:
  89       return STENCILOP_ZERO;
  90    }
  91 }
  92
  93 int
  94 intel_translate_blend_factor(GLenum factor)
  95 {
  96    switch (factor) {
  97    case GL_ZERO:
  98       return BLENDFACT_ZERO;
  99    case GL_SRC_ALPHA:
 100       return BLENDFACT_SRC_ALPHA;
 101    case GL_ONE:
 102       return BLENDFACT_ONE;
 103    case GL_SRC_COLOR:
 104       return BLENDFACT_SRC_COLR;
 105    case GL_ONE_MINUS_SRC_COLOR:
 106       return BLENDFACT_INV_SRC_COLR;
 107    case GL_DST_COLOR:
 108       return BLENDFACT_DST_COLR;
 109    case GL_ONE_MINUS_DST_COLOR:
 110       return BLENDFACT_INV_DST_COLR;
 111    case GL_ONE_MINUS_SRC_ALPHA:
 112       return BLENDFACT_INV_SRC_ALPHA;
 113    case GL_DST_ALPHA:
 114       return BLENDFACT_DST_ALPHA;
 115    case GL_ONE_MINUS_DST_ALPHA:
 116       return BLENDFACT_INV_DST_ALPHA;
 117    case GL_SRC_ALPHA_SATURATE:
 118       return BLENDFACT_SRC_ALPHA_SATURATE;
 119    case GL_CONSTANT_COLOR:
 120       return BLENDFACT_CONST_COLOR;
 121    case GL_ONE_MINUS_CONSTANT_COLOR:
 122       return BLENDFACT_INV_CONST_COLOR;
 123    case GL_CONSTANT_ALPHA:
 124       return BLENDFACT_CONST_ALPHA;
 125    case GL_ONE_MINUS_CONSTANT_ALPHA:
 126       return BLENDFACT_INV_CONST_ALPHA;
 127    }
 128
 129    fprintf(stderr, "Unknown value in %s: %x\n", __FUNCTION__, factor);
 130    return BLENDFACT_ZERO;
 131 }
 132
 133 int
 134 intel_translate_logic_op(GLenum opcode)
 135 {
 136    switch (opcode) {
 137    case GL_CLEAR:
 138       return LOGICOP_CLEAR;
 139    case GL_AND:
 140       return LOGICOP_AND;
 141    case GL_AND_REVERSE:
 142       return LOGICOP_AND_RVRSE;
 143    case GL_COPY:
 144       return LOGICOP_COPY;
 145    case GL_COPY_INVERTED:
 146       return LOGICOP_COPY_INV;
 147    case GL_AND_INVERTED:
 148       return LOGICOP_AND_INV;
 149    case GL_NOOP:
 150       return LOGICOP_NOOP;
 151    case GL_XOR:
 152       return LOGICOP_XOR;
 153    case GL_OR:
 154       return LOGICOP_OR;
 155    case GL_OR_INVERTED:
 156       return LOGICOP_OR_INV;
 157    case GL_NOR:
 158       return LOGICOP_NOR;
 159    case GL_EQUIV:
 160       return LOGICOP_EQUIV;
 161    case GL_INVERT:
 162       return LOGICOP_INV;
 163    case GL_OR_REVERSE:
 164       return LOGICOP_OR_RVRSE;
 165    case GL_NAND:
 166       return LOGICOP_NAND;
 167    case GL_SET:
 168       return LOGICOP_SET;
 169    default:
 170       return LOGICOP_SET;
 171    }
 172 }
 173
 174
 175 static void
 176 intelClearColor(GLcontext * ctx, const GLfloat color[4])
 177 {
 178    struct intel_context *intel = intel_context(ctx);
 179    GLubyte clear[4];
 180
 181    CLAMPED_FLOAT_TO_UBYTE(clear[0], color[0]);
 182    CLAMPED_FLOAT_TO_UBYTE(clear[1], color[1]);
 183    CLAMPED_FLOAT_TO_UBYTE(clear[2], color[2]);
 184    CLAMPED_FLOAT_TO_UBYTE(clear[3], color[3]);
 185
 186    /* compute both 32 and 16-bit clear values */
 187    intel->ClearColor8888 = INTEL_PACKCOLOR8888(clear[0], clear[1],
 188                                                clear[2], clear[3]);
 189    intel->ClearColor565 = INTEL_PACKCOLOR565(clear[0], clear[1], clear[2]);
 190 }
 191
 192
 193 /**
 194  * Update the viewport transformation matrix.  Depends on:
 195  *  - viewport pos/size
 196  *  - depthrange
 197  *  - window pos/size or FBO size
 198  */
 199 static void
 200 intelCalcViewport(GLcontext * ctx)
 201 {
 202    struct intel_context *intel = intel_context(ctx);
 203    const GLfloat *v = ctx->Viewport._WindowMap.m;
 204    const GLfloat depthScale = 1.0F / ctx->DrawBuffer->_DepthMaxF;
 205    GLfloat *m = intel->ViewportMatrix.m;
 206    GLfloat yScale, yBias;
 207
 208    if (ctx->DrawBuffer->Name) {
 209       /* User created FBO */
 210       struct intel_renderbuffer *irb
 211          = intel_renderbuffer(ctx->DrawBuffer->_ColorDrawBuffers[0][0]);
 212       if (irb && !irb->RenderToTexture) {
 213          /* y=0=top */
 214          yScale = -1.0;
 215          yBias = irb->Base.Height;
 216       }
 217       else {
 218          /* y=0=bottom */
 219          yScale = 1.0;
 220          yBias = 0.0;
 221       }
 222    }
 223    else {
 224       /* window buffer, y=0=top */
 225       yScale = -1.0;
 226       yBias = (intel->driDrawable) ? intel->driDrawable->h : 0.0F;
 227    }
 228
 229    m[MAT_SX] = v[MAT_SX];
 230    m[MAT_TX] = v[MAT_TX] + SUBPIXEL_X;
 231
 232    m[MAT_SY] = v[MAT_SY] * yScale;
 233    m[MAT_TY] = v[MAT_TY] * yScale + yBias + SUBPIXEL_Y;
 234
 235    m[MAT_SZ] = v[MAT_SZ] * depthScale;
 236    m[MAT_TZ] = v[MAT_TZ] * depthScale;
 237 }
 238
 239 static void
 240 intelViewport(GLcontext * ctx,
 241               GLint x, GLint y, GLsizei width, GLsizei height)
 242 {
 243    intelCalcViewport(ctx);
 244 }
 245
 246 static void
 247 intelDepthRange(GLcontext * ctx, GLclampd nearval, GLclampd farval)
 248 {
 249    intelCalcViewport(ctx);
 250 }
 251
 252 /* Fallback to swrast for select and feedback.
 253  */
 254 static void
 255 intelRenderMode(GLcontext * ctx, GLenum mode)
 256 {
 257    struct intel_context *intel = intel_context(ctx);
 258    FALLBACK(intel, INTEL_FALLBACK_RENDERMODE, (mode != GL_RENDER));
 259 }
 260
 261
 262 void
 263 intelInitStateFuncs(struct dd_function_table *functions)
 264 {
 265    functions->RenderMode = intelRenderMode;
 266    functions->Viewport = intelViewport;
 267    functions->DepthRange = intelDepthRange;
 268    functions->ClearColor = intelClearColor;
 269 }