Home | History | Annotate | Download | only in main 
      1 
      2 /*
      3  * Mesa 3-D graphics library
      4  *
      5  * Copyright (C) 1999-2002  Brian Paul   All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining a
      8  * copy of this software and associated documentation files (the "Software"),
      9  * to deal in the Software without restriction, including without limitation
     10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     11  * and/or sell copies of the Software, and to permit persons to whom the
     12  * Software is furnished to do so, subject to the following conditions:
     13  *
     14  * The above copyright notice and this permission notice shall be included
     15  * in all copies or substantial portions of the Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
     21  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     22  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     23  * OTHER DEALINGS IN THE SOFTWARE.
     24  */
     25 
     26 
     27 #include "glheader.h"
     28 #include "enums.h"
     29 #include "context.h"
     30 #include "hint.h"
     31 #include "imports.h"
     32 #include "mtypes.h"
     33 
     34 
     35 
     36 void GLAPIENTRY
     37 _mesa_Hint( GLenum target, GLenum mode )
     38 {
     39    GET_CURRENT_CONTEXT(ctx);
     40 
     41    if (MESA_VERBOSE & VERBOSE_API)
     42       _mesa_debug(ctx, "glHint %s %s\n",
     43                   _mesa_enum_to_string(target),
     44                   _mesa_enum_to_string(mode));
     45 
     46    if (mode != GL_NICEST && mode != GL_FASTEST && mode != GL_DONT_CARE) {
     47       _mesa_error(ctx, GL_INVALID_ENUM, "glHint(mode)");
     48       return;
     49    }
     50 
     51    switch (target) {
     52       case GL_FOG_HINT:
     53          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
     54             goto invalid_target;
     55          if (ctx->Hint.Fog == mode)
     56 	    return;
     57 	 FLUSH_VERTICES(ctx, _NEW_HINT);
     58          ctx->Hint.Fog = mode;
     59          break;
     60       case GL_LINE_SMOOTH_HINT:
     61          if (!_mesa_is_desktop_gl(ctx) && ctx->API != API_OPENGLES)
     62             goto invalid_target;
     63          if (ctx->Hint.LineSmooth == mode)
     64 	    return;
     65 	 FLUSH_VERTICES(ctx, _NEW_HINT);
     66          ctx->Hint.LineSmooth = mode;
     67          break;
     68       case GL_PERSPECTIVE_CORRECTION_HINT:
     69          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
     70             goto invalid_target;
     71          if (ctx->Hint.PerspectiveCorrection == mode)
     72 	    return;
     73 	 FLUSH_VERTICES(ctx, _NEW_HINT);
     74          ctx->Hint.PerspectiveCorrection = mode;
     75          break;
     76       case GL_POINT_SMOOTH_HINT:
     77          if (ctx->API != API_OPENGL_COMPAT && ctx->API != API_OPENGLES)
     78             goto invalid_target;
     79          if (ctx->Hint.PointSmooth == mode)
     80 	    return;
     81 	 FLUSH_VERTICES(ctx, _NEW_HINT);
     82          ctx->Hint.PointSmooth = mode;
     83          break;
     84       case GL_POLYGON_SMOOTH_HINT:
     85          if (!_mesa_is_desktop_gl(ctx))
     86             goto invalid_target;
     87          if (ctx->Hint.PolygonSmooth == mode)
     88 	    return;
     89 	 FLUSH_VERTICES(ctx, _NEW_HINT);
     90          ctx->Hint.PolygonSmooth = mode;
     91          break;
     92 
     93       /* GL_ARB_texture_compression */
     94       case GL_TEXTURE_COMPRESSION_HINT_ARB:
     95          if (!_mesa_is_desktop_gl(ctx))
     96             goto invalid_target;
     97 	 if (ctx->Hint.TextureCompression == mode)
     98 	    return;
     99 	 FLUSH_VERTICES(ctx, _NEW_HINT);
    100 	 ctx->Hint.TextureCompression = mode;
    101          break;
    102 
    103       /* GL_SGIS_generate_mipmap */
    104       case GL_GENERATE_MIPMAP_HINT_SGIS:
    105          if (ctx->API == API_OPENGL_CORE)
    106             goto invalid_target;
    107          if (ctx->Hint.GenerateMipmap == mode)
    108             return;
    109 	 FLUSH_VERTICES(ctx, _NEW_HINT);
    110 	 ctx->Hint.GenerateMipmap = mode;
    111          break;
    112 
    113       /* GL_ARB_fragment_shader */
    114       case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_ARB:
    115          if (ctx->API == API_OPENGLES || !ctx->Extensions.ARB_fragment_shader)
    116             goto invalid_target;
    117          if (ctx->Hint.FragmentShaderDerivative == mode)
    118             return;
    119          FLUSH_VERTICES(ctx, _NEW_HINT);
    120          ctx->Hint.FragmentShaderDerivative = mode;
    121          break;
    122 
    123       default:
    124          goto invalid_target;
    125    }
    126    return;
    127 
    128 invalid_target:
    129    _mesa_error(ctx, GL_INVALID_ENUM, "glHint(target)");
    130    return;
    131 }
    132 
    133 
    134 /**********************************************************************/
    135 /*****                      Initialization                        *****/
    136 /**********************************************************************/
    137 
    138 void _mesa_init_hint( struct gl_context * ctx )
    139 {
    140    /* Hint group */
    141    ctx->Hint.PerspectiveCorrection = GL_DONT_CARE;
    142    ctx->Hint.PointSmooth = GL_DONT_CARE;
    143    ctx->Hint.LineSmooth = GL_DONT_CARE;
    144    ctx->Hint.PolygonSmooth = GL_DONT_CARE;
    145    ctx->Hint.Fog = GL_DONT_CARE;
    146    ctx->Hint.TextureCompression = GL_DONT_CARE;
    147    ctx->Hint.GenerateMipmap = GL_DONT_CARE;
    148    ctx->Hint.FragmentShaderDerivative = GL_DONT_CARE;
    149 }
    150