state.c

winNT技术操作系统,国外开放的原代码和LIUX一样

   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
}



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

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

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

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

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

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

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

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

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

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

   if (ctx->Array.EdgeFlag.Enabled) {
      min = MIN2(min, ctx->Array.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)
{
   /* For now, just set the _Enabled (really enabled) flags.
    * In the future we may have to check other state to be sure we really
    * have a runable program or shader.
    */
   ctx->VertexProgram._Enabled = ctx->VertexProgram.Enabled
      && ctx->VertexProgram.Current->Instructions;
   ctx->FragmentProgram._Enabled = ctx->FragmentProgram.Enabled
      && ctx->FragmentProgram.Current->Instructions;
   ctx->ATIFragmentShader._Enabled = ctx->ATIFragmentShader.Enabled
      && ctx->ATIFragmentShader.Current->Instructions;
      
   ctx->FragmentProgram._Current = ctx->FragmentProgram.Current;
   ctx->FragmentProgram._Active = ctx->FragmentProgram._Enabled;

   if (ctx->_MaintainTexEnvProgram && !ctx->FragmentProgram._Enabled) {
      if (!ctx->_TexEnvProgram)
	 ctx->_TexEnvProgram = (struct fragment_program *)
	    ctx->Driver.NewProgram(ctx, GL_FRAGMENT_PROGRAM_ARB, 0);

      ctx->FragmentProgram._Current = ctx->_TexEnvProgram;
      ctx->FragmentProgram._Active = GL_TRUE;
   }
}


/**
 * If __GLcontextRec::NewState is non-zero then this function \b must be called
 * before rendering any primitive.  Basically, function pointers and
 * miscellaneous flags are updated to reflect the current state of the state
 * machine.
 *
 * Calls dd_function_table::UpdateState to perform any internal state
 * management necessary.
 * 
 * \sa _mesa_update_modelview_project(), _mesa_update_texture(),
 * _mesa_update_buffer_bounds(), _mesa_update_polygon(),
 * _mesa_update_lighting() and _mesa_update_tnl_spaces().
 */
void
_mesa_update_state( GLcontext *ctx )
{
   GLuint new_state = ctx->NewState;

   if (MESA_VERBOSE & VERBOSE_STATE)
      _mesa_print_state("_mesa_update_state", new_state);

   if (new_state & _NEW_PROGRAM)
      update_program( ctx );

   if (new_state & (_NEW_MODELVIEW|_NEW_PROJECTION))
      _mesa_update_modelview_project( ctx, new_state );

   if (new_state & (_NEW_PROGRAM|_NEW_TEXTURE|_NEW_TEXTURE_MATRIX))
      _mesa_update_texture( ctx, new_state );

   if (new_state & (_NEW_BUFFERS | _NEW_COLOR | _NEW_PIXEL))
      _mesa_update_framebuffer(ctx);

   if (new_state & (_NEW_SCISSOR | _NEW_BUFFERS | _NEW_VIEWPORT))
      _mesa_update_draw_buffer_bounds( ctx );

   if (new_state & _NEW_POINT)
      _mesa_update_point( ctx );

   if (new_state & _NEW_POLYGON)
      _mesa_update_polygon( ctx );

   if (new_state & _NEW_LIGHT)
      _mesa_update_lighting( ctx );

   if (new_state & _IMAGE_NEW_TRANSFER_STATE)
      _mesa_update_pixel( ctx, new_state );

   if (new_state & _DD_NEW_SEPARATE_SPECULAR)
      update_separate_specular( ctx );

   if (new_state & (_NEW_ARRAY | _NEW_PROGRAM))
      update_arrays( ctx );

   if (ctx->_MaintainTexEnvProgram) {
      if (new_state & (_NEW_TEXTURE | _DD_NEW_SEPARATE_SPECULAR | _NEW_FOG))
	 _mesa_UpdateTexEnvProgram(ctx);
   }

   /* ctx->_NeedEyeCoords is now up to date.
    *
    * If the truth value of this variable has changed, update for the
    * new lighting space and recompute the positions of lights and the
    * normal transform.
    *
    * If the lighting space hasn't changed, may still need to recompute
    * light positions & normal transforms for other reasons.
    */
   if (new_state & _MESA_NEW_NEED_EYE_COORDS) 
      _mesa_update_tnl_spaces( ctx, new_state );

   /*
    * Give the driver a chance to act upon the new_state flags.
    * The driver might plug in different span functions, for example.
    * Also, this is where the driver can invalidate the state of any
    * active modules (such as swrast_setup, swrast, tnl, etc).
    *
    * Set ctx->NewState to zero to avoid recursion if
    * Driver.UpdateState() has to call FLUSH_VERTICES().  (fixed?)
    */
   new_state = ctx->NewState;
   ctx->NewState = 0;
   ctx->Driver.UpdateState(ctx, new_state);
   ctx->Array.NewState = 0;
}

/*@}*/