src/mesa/main/state.h

   1 /*
   2  * Mesa 3-D graphics library
   3  *
   4  * Copyright (C) 1999-2008  Brian Paul   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 "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included
  14  * in all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 #ifndef STATE_H
  27 #define STATE_H
  28
  29 #include "mtypes.h"
  30
  31 extern void
  32 _mesa_update_allow_draw_out_of_order(struct gl_context *ctx);
  33
  34 extern void
  35 _mesa_update_state(struct gl_context *ctx);
  36
  37 /* As above but can only be called between _mesa_lock_context_textures() and
  38  * _mesa_unlock_context_textures().
  39  */
  40 extern void
  41 _mesa_update_state_locked(struct gl_context *ctx);
  42
  43
  44 extern void
  45 _mesa_set_vp_override(struct gl_context *ctx, GLboolean flag);
  46
  47
  48 /**
  49  * Update ctx->VertexProgram._VPMode.
  50  */
  51 extern void
  52 _mesa_update_vertex_processing_mode(struct gl_context *ctx);
  53
  54
  55 /**
  56  * Set the _DrawVAO and the net enabled arrays.
  57  */
  58 void
  59 _mesa_set_draw_vao(struct gl_context *ctx, struct gl_vertex_array_object *vao,
  60                    GLbitfield filter);
  61
  62
  63 static inline bool
  64 _mesa_ati_fragment_shader_enabled(const struct gl_context *ctx)
  65 {
  66    return ctx->ATIFragmentShader.Enabled &&
  67           ctx->ATIFragmentShader.Current->Instructions[0];
  68 }
  69
  70 /**
  71  * Is the secondary color needed?
  72  */
  73 static inline GLboolean
  74 _mesa_need_secondary_color(const struct gl_context *ctx)
  75 {
  76    if (ctx->Light.Enabled &&
  77        ctx->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR)
  78        return GL_TRUE;
  79
  80    if (ctx->Fog.ColorSumEnabled)
  81       return GL_TRUE;
  82
  83    if (ctx->VertexProgram._Current &&
  84        (ctx->VertexProgram._Current != ctx->VertexProgram._TnlProgram) &&
  85        (ctx->VertexProgram._Current->info.inputs_read & VERT_BIT_COLOR1))
  86       return GL_TRUE;
  87
  88    if (ctx->FragmentProgram._Current &&
  89        (ctx->FragmentProgram._Current != ctx->FragmentProgram._TexEnvProgram) &&
  90        (ctx->FragmentProgram._Current->info.inputs_read & VARYING_BIT_COL1))
  91       return GL_TRUE;
  92
  93    if (_mesa_ati_fragment_shader_enabled(ctx))
  94       return GL_TRUE;
  95
  96    return GL_FALSE;
  97 }
  98
  99 static inline bool
 100 _mesa_arb_vertex_program_enabled(const struct gl_context *ctx)
 101 {
 102    return ctx->VertexProgram.Enabled &&
 103           ctx->VertexProgram.Current->arb.Instructions;
 104 }
 105
 106 /** Compute two sided lighting state for fixed function or programs. */
 107 static inline bool
 108 _mesa_vertex_program_two_side_enabled(const struct gl_context *ctx)
 109 {
 110    if (ctx->_Shader->CurrentProgram[MESA_SHADER_VERTEX] ||
 111        _mesa_arb_vertex_program_enabled(ctx))
 112       return ctx->VertexProgram.TwoSideEnabled;
 113
 114    return ctx->Light.Enabled && ctx->Light.Model.TwoSide;
 115 }
 116
 117 /** Return 0=GL_CCW or 1=GL_CW */
 118 static inline bool
 119 _mesa_polygon_get_front_bit(const struct gl_context *ctx)
 120 {
 121    if (ctx->Transform.ClipOrigin == GL_LOWER_LEFT)
 122       return ctx->Polygon.FrontFace == GL_CW;
 123
 124    return ctx->Polygon.FrontFace == GL_CCW;
 125 }
 126
 127 static inline bool
 128 _mesa_arb_fragment_program_enabled(const struct gl_context *ctx)
 129 {
 130    return ctx->FragmentProgram.Enabled &&
 131           ctx->FragmentProgram.Current->arb.Instructions;
 132 }
 133
 134 #endif