state.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

   /* glVertexAttrib4uivARB handled in api_loopback.c */
   /* glVertexAttrib4NbvARB handled in api_loopback.c */
   /* glVertexAttrib4NsvARB handled in api_loopback.c */
   /* glVertexAttrib4NivARB handled in api_loopback.c */
   /* glVertexAttrib4NusvARB handled in api_loopback.c */
   /* glVertexAttrib4NuivARB handled in api_loopback.c */
   SET_VertexAttribPointerARB(exec, _mesa_VertexAttribPointerARB);
   SET_EnableVertexAttribArrayARB(exec, _mesa_EnableVertexAttribArrayARB);
   SET_DisableVertexAttribArrayARB(exec, _mesa_DisableVertexAttribArrayARB);
   SET_ProgramStringARB(exec, _mesa_ProgramStringARB);
   /* glBindProgramARB aliases glBindProgramNV */
   /* glDeleteProgramsARB aliases glDeleteProgramsNV */
   /* glGenProgramsARB aliases glGenProgramsNV */
   /* glIsProgramARB aliases glIsProgramNV */
   SET_GetVertexAttribdvARB(exec, _mesa_GetVertexAttribdvARB);
   SET_GetVertexAttribfvARB(exec, _mesa_GetVertexAttribfvARB);
   SET_GetVertexAttribivARB(exec, _mesa_GetVertexAttribivARB);
   /* glGetVertexAttribPointervARB aliases glGetVertexAttribPointervNV */
   SET_ProgramEnvParameter4dARB(exec, _mesa_ProgramEnvParameter4dARB);
   SET_ProgramEnvParameter4dvARB(exec, _mesa_ProgramEnvParameter4dvARB);
   SET_ProgramEnvParameter4fARB(exec, _mesa_ProgramEnvParameter4fARB);
   SET_ProgramEnvParameter4fvARB(exec, _mesa_ProgramEnvParameter4fvARB);
   SET_ProgramLocalParameter4dARB(exec, _mesa_ProgramLocalParameter4dARB);
   SET_ProgramLocalParameter4dvARB(exec, _mesa_ProgramLocalParameter4dvARB);
   SET_ProgramLocalParameter4fARB(exec, _mesa_ProgramLocalParameter4fARB);
   SET_ProgramLocalParameter4fvARB(exec, _mesa_ProgramLocalParameter4fvARB);
   SET_GetProgramEnvParameterdvARB(exec, _mesa_GetProgramEnvParameterdvARB);
   SET_GetProgramEnvParameterfvARB(exec, _mesa_GetProgramEnvParameterfvARB);
   SET_GetProgramLocalParameterdvARB(exec, _mesa_GetProgramLocalParameterdvARB);
   SET_GetProgramLocalParameterfvARB(exec, _mesa_GetProgramLocalParameterfvARB);
   SET_GetProgramivARB(exec, _mesa_GetProgramivARB);
   SET_GetProgramStringARB(exec, _mesa_GetProgramStringARB);
#endif

   /* ARB 28. GL_ARB_vertex_buffer_object */
#if FEATURE_ARB_vertex_buffer_object
   SET_BindBufferARB(exec, _mesa_BindBufferARB);
   SET_BufferDataARB(exec, _mesa_BufferDataARB);
   SET_BufferSubDataARB(exec, _mesa_BufferSubDataARB);
   SET_DeleteBuffersARB(exec, _mesa_DeleteBuffersARB);
   SET_GenBuffersARB(exec, _mesa_GenBuffersARB);
   SET_GetBufferParameterivARB(exec, _mesa_GetBufferParameterivARB);
   SET_GetBufferPointervARB(exec, _mesa_GetBufferPointervARB);
   SET_GetBufferSubDataARB(exec, _mesa_GetBufferSubDataARB);
   SET_IsBufferARB(exec, _mesa_IsBufferARB);
   SET_MapBufferARB(exec, _mesa_MapBufferARB);
   SET_UnmapBufferARB(exec, _mesa_UnmapBufferARB);
#endif

   /* ARB 29. GL_ARB_occlusion_query */
#if FEATURE_ARB_occlusion_query
   SET_GenQueriesARB(exec, _mesa_GenQueriesARB);
   SET_DeleteQueriesARB(exec, _mesa_DeleteQueriesARB);
   SET_IsQueryARB(exec, _mesa_IsQueryARB);
   SET_BeginQueryARB(exec, _mesa_BeginQueryARB);
   SET_EndQueryARB(exec, _mesa_EndQueryARB);
   SET_GetQueryivARB(exec, _mesa_GetQueryivARB);
   SET_GetQueryObjectivARB(exec, _mesa_GetQueryObjectivARB);
   SET_GetQueryObjectuivARB(exec, _mesa_GetQueryObjectuivARB);
#endif

   /* ARB 37. GL_ARB_draw_buffers */
   SET_DrawBuffersARB(exec, _mesa_DrawBuffersARB);
   
#if FEATURE_ARB_shader_objects
   SET_DeleteObjectARB(exec, _mesa_DeleteObjectARB);
   SET_GetHandleARB(exec, _mesa_GetHandleARB);
   SET_DetachObjectARB(exec, _mesa_DetachObjectARB);
   SET_CreateShaderObjectARB(exec, _mesa_CreateShaderObjectARB);
   SET_ShaderSourceARB(exec, _mesa_ShaderSourceARB);
   SET_CompileShaderARB(exec, _mesa_CompileShaderARB);
   SET_CreateProgramObjectARB(exec, _mesa_CreateProgramObjectARB);
   SET_AttachObjectARB(exec, _mesa_AttachObjectARB);
   SET_LinkProgramARB(exec, _mesa_LinkProgramARB);
   SET_UseProgramObjectARB(exec, _mesa_UseProgramObjectARB);
   SET_ValidateProgramARB(exec, _mesa_ValidateProgramARB);
   SET_Uniform1fARB(exec, _mesa_Uniform1fARB);
   SET_Uniform2fARB(exec, _mesa_Uniform2fARB);
   SET_Uniform3fARB(exec, _mesa_Uniform3fARB);
   SET_Uniform4fARB(exec, _mesa_Uniform4fARB);
   SET_Uniform1iARB(exec, _mesa_Uniform1iARB);
   SET_Uniform2iARB(exec, _mesa_Uniform2iARB);
   SET_Uniform3iARB(exec, _mesa_Uniform3iARB);
   SET_Uniform4iARB(exec, _mesa_Uniform4iARB);
   SET_Uniform1fvARB(exec, _mesa_Uniform1fvARB);
   SET_Uniform2fvARB(exec, _mesa_Uniform2fvARB);
   SET_Uniform3fvARB(exec, _mesa_Uniform3fvARB);
   SET_Uniform4fvARB(exec, _mesa_Uniform4fvARB);
   SET_Uniform1ivARB(exec, _mesa_Uniform1ivARB);
   SET_Uniform2ivARB(exec, _mesa_Uniform2ivARB);
   SET_Uniform3ivARB(exec, _mesa_Uniform3ivARB);
   SET_Uniform4ivARB(exec, _mesa_Uniform4ivARB);
   SET_UniformMatrix2fvARB(exec, _mesa_UniformMatrix2fvARB);
   SET_UniformMatrix3fvARB(exec, _mesa_UniformMatrix3fvARB);
   SET_UniformMatrix4fvARB(exec, _mesa_UniformMatrix4fvARB);
   SET_GetObjectParameterfvARB(exec, _mesa_GetObjectParameterfvARB);
   SET_GetObjectParameterivARB(exec, _mesa_GetObjectParameterivARB);
   SET_GetInfoLogARB(exec, _mesa_GetInfoLogARB);
   SET_GetAttachedObjectsARB(exec, _mesa_GetAttachedObjectsARB);
   SET_GetUniformLocationARB(exec, _mesa_GetUniformLocationARB);
   SET_GetActiveUniformARB(exec, _mesa_GetActiveUniformARB);
   SET_GetUniformfvARB(exec, _mesa_GetUniformfvARB);
   SET_GetUniformivARB(exec, _mesa_GetUniformivARB);
   SET_GetShaderSourceARB(exec, _mesa_GetShaderSourceARB);
#endif    /* FEATURE_ARB_shader_objects */

#if FEATURE_ARB_vertex_shader
   SET_BindAttribLocationARB(exec, _mesa_BindAttribLocationARB);
   SET_GetActiveAttribARB(exec, _mesa_GetActiveAttribARB);
   SET_GetAttribLocationARB(exec, _mesa_GetAttribLocationARB);
#endif    /* FEATURE_ARB_vertex_shader */

  /* GL_ATI_fragment_shader */
#if FEATURE_ATI_fragment_shader
   SET_GenFragmentShadersATI(exec, _mesa_GenFragmentShadersATI);
   SET_BindFragmentShaderATI(exec, _mesa_BindFragmentShaderATI);
   SET_DeleteFragmentShaderATI(exec, _mesa_DeleteFragmentShaderATI);
   SET_BeginFragmentShaderATI(exec, _mesa_BeginFragmentShaderATI);
   SET_EndFragmentShaderATI(exec, _mesa_EndFragmentShaderATI);
   SET_PassTexCoordATI(exec, _mesa_PassTexCoordATI);
   SET_SampleMapATI(exec, _mesa_SampleMapATI);
   SET_ColorFragmentOp1ATI(exec, _mesa_ColorFragmentOp1ATI);
   SET_ColorFragmentOp2ATI(exec, _mesa_ColorFragmentOp2ATI);
   SET_ColorFragmentOp3ATI(exec, _mesa_ColorFragmentOp3ATI);
   SET_AlphaFragmentOp1ATI(exec, _mesa_AlphaFragmentOp1ATI);
   SET_AlphaFragmentOp2ATI(exec, _mesa_AlphaFragmentOp2ATI);
   SET_AlphaFragmentOp3ATI(exec, _mesa_AlphaFragmentOp3ATI);
   SET_SetFragmentShaderConstantATI(exec, _mesa_SetFragmentShaderConstantATI);
#endif

#if FEATURE_EXT_framebuffer_object
   SET_IsRenderbufferEXT(exec, _mesa_IsRenderbufferEXT);
   SET_BindRenderbufferEXT(exec, _mesa_BindRenderbufferEXT);
   SET_DeleteRenderbuffersEXT(exec, _mesa_DeleteRenderbuffersEXT);
   SET_GenRenderbuffersEXT(exec, _mesa_GenRenderbuffersEXT);
   SET_RenderbufferStorageEXT(exec, _mesa_RenderbufferStorageEXT);
   SET_GetRenderbufferParameterivEXT(exec, _mesa_GetRenderbufferParameterivEXT);
   SET_IsFramebufferEXT(exec, _mesa_IsFramebufferEXT);
   SET_BindFramebufferEXT(exec, _mesa_BindFramebufferEXT);
   SET_DeleteFramebuffersEXT(exec, _mesa_DeleteFramebuffersEXT);
   SET_GenFramebuffersEXT(exec, _mesa_GenFramebuffersEXT);
   SET_CheckFramebufferStatusEXT(exec, _mesa_CheckFramebufferStatusEXT);
   SET_FramebufferTexture1DEXT(exec, _mesa_FramebufferTexture1DEXT);
   SET_FramebufferTexture2DEXT(exec, _mesa_FramebufferTexture2DEXT);
   SET_FramebufferTexture3DEXT(exec, _mesa_FramebufferTexture3DEXT);
   SET_FramebufferRenderbufferEXT(exec, _mesa_FramebufferRenderbufferEXT);
   SET_GetFramebufferAttachmentParameterivEXT(exec, _mesa_GetFramebufferAttachmentParameterivEXT);
   SET_GenerateMipmapEXT(exec, _mesa_GenerateMipmapEXT);
#endif

#if FEATURE_EXT_timer_query
   SET_GetQueryObjecti64vEXT(exec, _mesa_GetQueryObjecti64vEXT);
   SET_GetQueryObjectui64vEXT(exec, _mesa_GetQueryObjectui64vEXT);
#endif

#if FEATURE_EXT_framebuffer_blit
   SET_BlitFramebufferEXT(exec, _mesa_BlitFramebufferEXT);
#endif

   /* GL_EXT_gpu_program_parameters */
#if FEATURE_ARB_vertex_program || FEATURE_ARB_fragment_program
   SET_ProgramEnvParameters4fvEXT(exec, _mesa_ProgramEnvParameters4fvEXT);
   SET_ProgramLocalParameters4fvEXT(exec, _mesa_ProgramLocalParameters4fvEXT);
#endif

   /* GL_MESA_texture_array / GL_EXT_texture_array */
#if FEATURE_EXT_framebuffer_object
   SET_FramebufferTextureLayerEXT(exec, _mesa_FramebufferTextureLayerEXT);
#endif

   /* GL_ATI_separate_stencil */
   SET_StencilFuncSeparateATI(exec, _mesa_StencilFuncSeparateATI);
}



/**********************************************************************/
/** \name State update logic */
/*@{*/


static void
update_separate_specular(GLcontext *ctx)
{
   if (NEED_SECONDARY_COLOR(ctx))
      ctx->_TriangleCaps |= DD_SEPARATE_SPECULAR;
   else
      ctx->_TriangleCaps &= ~DD_SEPARATE_SPECULAR;
}


/**
 * Update state dependent on vertex arrays.
 */
static void
update_arrays( GLcontext *ctx )
{
   GLuint i, min;

   /* find min of _MaxElement values for all enabled arrays */

   /* 0 */
   if (ctx->VertexProgram._Current
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS].Enabled) {
      min = ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_POS]._MaxElement;
   }
   else if (ctx->Array.ArrayObj->Vertex.Enabled) {
      min = ctx->Array.ArrayObj->Vertex._MaxElement;
   }
   else {
      /* can't draw anything without vertex positions! */
      min = 0;
   }

   /* 1 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_WEIGHT]._MaxElement);
   }
   /* no conventional vertex weight array */

   /* 2 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_NORMAL]._MaxElement);
   }
   else if (ctx->Array.ArrayObj->Normal.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->Normal._MaxElement);
   }

   /* 3 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR0]._MaxElement);
   }
   else if (ctx->Array.ArrayObj->Color.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->Color._MaxElement);
   }

   /* 4 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR1]._MaxElement);
   }
   else if (ctx->Array.ArrayObj->SecondaryColor.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->SecondaryColor._MaxElement);
   }

   /* 5 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_FOG]._MaxElement);
   }
   else if (ctx->Array.ArrayObj->FogCoord.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->FogCoord._MaxElement);
   }

   /* 6 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_COLOR_INDEX]._MaxElement);
   }
   else if (ctx->Array.ArrayObj->Index.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->Index._MaxElement);
   }


   /* 7 */
   if (ctx->VertexProgram._Enabled
       && ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG].Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[VERT_ATTRIB_EDGEFLAG]._MaxElement);
   }

   /* 8..15 */
   for (i = VERT_ATTRIB_TEX0; i <= VERT_ATTRIB_TEX7; i++) {
      if (ctx->VertexProgram._Enabled
          && ctx->Array.ArrayObj->VertexAttrib[i].Enabled) {
         min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[i]._MaxElement);
      }
      else if (i - VERT_ATTRIB_TEX0 < ctx->Const.MaxTextureCoordUnits
               && ctx->Array.ArrayObj->TexCoord[i - VERT_ATTRIB_TEX0].Enabled) {
         min = MIN2(min, ctx->Array.ArrayObj->TexCoord[i - VERT_ATTRIB_TEX0]._MaxElement);
      }
   }

   /* 16..31 */
   if (ctx->VertexProgram._Current) {
      for (i = VERT_ATTRIB_GENERIC0; i < VERT_ATTRIB_MAX; i++) {
         if (ctx->Array.ArrayObj->VertexAttrib[i].Enabled) {
            min = MIN2(min, ctx->Array.ArrayObj->VertexAttrib[i]._MaxElement);
         }
      }
   }

   if (ctx->Array.ArrayObj->EdgeFlag.Enabled) {
      min = MIN2(min, ctx->Array.ArrayObj->EdgeFlag._MaxElement);
   }

   /* _MaxElement is one past the last legal array element */
   ctx->Array._MaxElement = min;
}


/**
 * Update derived vertex/fragment program state.
 */
static void
update_program(GLcontext *ctx)
{
   const struct gl_shader_program *shProg = ctx->Shader.CurrentProgram;

   /* These _Enabled flags indicate if the program is enabled AND valid. */
   ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
      && ctx->VertexProgram.Current->Base.Instructions;
   ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled
      && ctx->FragmentProgram.Current->Base.Instructions;
   ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled
      && ctx->ATIFragmentShader.Current->Instructions[0];

   /*
    * Set the ctx->VertexProgram._Current and ctx->FragmentProgram._Current
    * pointers to the programs that should be enabled/used.
    *
    * These programs may come from several sources.  The priority is as
    * follows: