src/mesa/main/blend.h

   1 /**
   2  * \file blend.h
   3  * Blending functions operations.
   4  */
   5
   6 /*
   7  * Mesa 3-D graphics library
   8  *
   9  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
  10  *
  11  * Permission is hereby granted, free of charge, to any person obtaining a
  12  * copy of this software and associated documentation files (the "Software"),
  13  * to deal in the Software without restriction, including without limitation
  14  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  15  * and/or sell copies of the Software, and to permit persons to whom the
  16  * Software is furnished to do so, subject to the following conditions:
  17  *
  18  * The above copyright notice and this permission notice shall be included
  19  * in all copies or substantial portions of the Software.
  20  *
  21  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  22  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  23  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  24  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  25  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  26  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  27  * OTHER DEALINGS IN THE SOFTWARE.
  28  */
  29
  30
  31
  32 #ifndef BLEND_H
  33 #define BLEND_H
  34
  35
  36 #include "glheader.h"
  37 #include "context.h"
  38 #include "formats.h"
  39 #include "extensions.h"
  40
  41 struct gl_context;
  42 struct gl_framebuffer;
  43
  44
  45 extern void GLAPIENTRY
  46 _mesa_BlendFunc( GLenum sfactor, GLenum dfactor );
  47
  48 extern void GLAPIENTRY
  49 _mesa_BlendFunc_no_error(GLenum sfactor, GLenum dfactor);
  50
  51 extern void GLAPIENTRY
  52 _mesa_BlendFuncSeparate( GLenum sfactorRGB, GLenum dfactorRGB,
  53                             GLenum sfactorA, GLenum dfactorA );
  54
  55 extern void GLAPIENTRY
  56 _mesa_BlendFuncSeparate_no_error(GLenum sfactorRGB, GLenum dfactorRGB,
  57                                  GLenum sfactorA, GLenum dfactorA);
  58
  59 extern void GLAPIENTRY
  60 _mesa_BlendFunciARB_no_error(GLuint buf, GLenum sfactor, GLenum dfactor);
  61 extern void GLAPIENTRY
  62 _mesa_BlendFunciARB(GLuint buf, GLenum sfactor, GLenum dfactor);
  63
  64
  65 extern void GLAPIENTRY
  66 _mesa_BlendFuncSeparateiARB_no_error(GLuint buf, GLenum sfactorRGB,
  67                                      GLenum dfactorRGB, GLenum sfactorA,
  68                                      GLenum dfactorA);
  69 extern void GLAPIENTRY
  70 _mesa_BlendFuncSeparateiARB(GLuint buf, GLenum sfactorRGB, GLenum dfactorRGB,
  71                          GLenum sfactorA, GLenum dfactorA);
  72
  73
  74 extern void GLAPIENTRY
  75 _mesa_BlendEquation( GLenum mode );
  76
  77
  78 void GLAPIENTRY
  79 _mesa_BlendEquationiARB_no_error(GLuint buf, GLenum mode);
  80
  81 extern void GLAPIENTRY
  82 _mesa_BlendEquationiARB(GLuint buf, GLenum mode);
  83
  84
  85 void GLAPIENTRY
  86 _mesa_BlendEquationSeparate_no_error(GLenum modeRGB, GLenum modeA);
  87
  88 extern void GLAPIENTRY
  89 _mesa_BlendEquationSeparate( GLenum modeRGB, GLenum modeA );
  90
  91
  92 extern void GLAPIENTRY
  93 _mesa_BlendEquationSeparateiARB_no_error(GLuint buf, GLenum modeRGB,
  94                                          GLenum modeA);
  95 extern void GLAPIENTRY
  96 _mesa_BlendEquationSeparateiARB(GLuint buf, GLenum modeRGB, GLenum modeA);
  97
  98
  99 extern void GLAPIENTRY
 100 _mesa_BlendColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha);
 101
 102
 103 extern void GLAPIENTRY
 104 _mesa_AlphaFunc( GLenum func, GLclampf ref );
 105
 106
 107 extern void GLAPIENTRY
 108 _mesa_LogicOp( GLenum opcode );
 109
 110
 111 extern void GLAPIENTRY
 112 _mesa_LogicOp_no_error(GLenum opcode);
 113
 114
 115 extern void GLAPIENTRY
 116 _mesa_IndexMask( GLuint mask );
 117
 118 extern void GLAPIENTRY
 119 _mesa_ColorMask( GLboolean red, GLboolean green,
 120                  GLboolean blue, GLboolean alpha );
 121
 122 extern void GLAPIENTRY
 123 _mesa_ColorMaski( GLuint buf, GLboolean red, GLboolean green,
 124                         GLboolean blue, GLboolean alpha );
 125
 126
 127 extern void GLAPIENTRY
 128 _mesa_ClampColor(GLenum target, GLenum clamp);
 129
 130 extern GLboolean
 131 _mesa_get_clamp_fragment_color(const struct gl_context *ctx,
 132                                const struct gl_framebuffer *drawFb);
 133
 134 extern GLboolean
 135 _mesa_get_clamp_vertex_color(const struct gl_context *ctx,
 136                              const struct gl_framebuffer *drawFb);
 137
 138 extern GLboolean
 139 _mesa_get_clamp_read_color(const struct gl_context *ctx,
 140                            const struct gl_framebuffer *readFb);
 141
 142 extern void
 143 _mesa_update_clamp_fragment_color(struct gl_context *ctx,
 144                                   const struct gl_framebuffer *drawFb);
 145
 146 extern void
 147 _mesa_update_clamp_vertex_color(struct gl_context *ctx,
 148                                 const struct gl_framebuffer *drawFb);
 149
 150 extern mesa_format
 151 _mesa_get_render_format(const struct gl_context *ctx, mesa_format format);
 152
 153 extern void
 154 _mesa_init_color( struct gl_context * ctx );
 155
 156
 157 static inline enum gl_advanced_blend_mode
 158 _mesa_get_advanced_blend_sh_constant(GLbitfield blend_enabled,
 159                                      enum gl_advanced_blend_mode mode)
 160 {
 161    return blend_enabled ? mode : BLEND_NONE;
 162 }
 163
 164 static inline bool
 165 _mesa_advanded_blend_sh_constant_changed(struct gl_context *ctx,
 166                                          GLbitfield new_blend_enabled,
 167                                          enum gl_advanced_blend_mode new_mode)
 168 {
 169    return _mesa_get_advanced_blend_sh_constant(new_blend_enabled, new_mode) !=
 170           _mesa_get_advanced_blend_sh_constant(ctx->Color.BlendEnabled,
 171                                                ctx->Color._AdvancedBlendMode);
 172 }
 173
 174 static inline void
 175 _mesa_flush_vertices_for_blend_state(struct gl_context *ctx)
 176 {
 177    if (!ctx->DriverFlags.NewBlend) {
 178       FLUSH_VERTICES(ctx, _NEW_COLOR);
 179    } else {
 180       FLUSH_VERTICES(ctx, 0);
 181       ctx->NewDriverState |= ctx->DriverFlags.NewBlend;
 182    }
 183 }
 184
 185 static inline void
 186 _mesa_flush_vertices_for_blend_adv(struct gl_context *ctx,
 187                                    GLbitfield new_blend_enabled,
 188                                    enum gl_advanced_blend_mode new_mode)
 189 {
 190    /* The advanced blend mode needs _NEW_COLOR to update the state constant. */
 191    if (_mesa_has_KHR_blend_equation_advanced(ctx) &&
 192        _mesa_advanded_blend_sh_constant_changed(ctx, new_blend_enabled,
 193                                                 new_mode)) {
 194       FLUSH_VERTICES(ctx, _NEW_COLOR);
 195       ctx->NewDriverState |= ctx->DriverFlags.NewBlend;
 196       return;
 197    }
 198    _mesa_flush_vertices_for_blend_state(ctx);
 199 }
 200
 201 static inline GLbitfield
 202 _mesa_replicate_colormask(GLbitfield mask0, unsigned num_buffers)
 203 {
 204    GLbitfield mask = mask0;
 205
 206    for (unsigned i = 1; i < num_buffers; i++)
 207       mask |= mask0 << (i * 4);
 208    return mask;
 209 }
 210
 211 #endif