arbprogram.c

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

         _mesa_error(ctx, GL_INVALID_ENUM, "glGetVertexAttribfvARB(pname)");
         return;
   }
}


void GLAPIENTRY
_mesa_GetVertexAttribivARB(GLuint index, GLenum pname, GLint *params)
{
   GLfloat fparams[4];
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   _mesa_GetVertexAttribfvARB(index, pname, fparams);
   if (ctx->ErrorValue == GL_NO_ERROR) {
      if (pname == GL_CURRENT_VERTEX_ATTRIB_ARB) {
         COPY_4V_CAST(params, fparams, GLint);  /* float to int */
      }
      else {
         params[0] = (GLint) fparams[0];
      }
   }
}


void GLAPIENTRY
_mesa_GetVertexAttribPointervARB(GLuint index, GLenum pname, GLvoid **pointer)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   if (index >= ctx->Const.VertexProgram.MaxAttribs) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glGetVertexAttribPointerARB(index)");
      return;
   }

   if (pname != GL_VERTEX_ATTRIB_ARRAY_POINTER_ARB) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glGetVertexAttribPointerARB(pname)");
      return;
   }

   *pointer = (GLvoid *) ctx->Array.ArrayObj->VertexAttrib[index].Ptr;
}


/**
 * Determine if id names a vertex or fragment program.
 * \note Not compiled into display lists.
 * \note Called from both glIsProgramNV and glIsProgramARB.
 * \param id is the program identifier
 * \return GL_TRUE if id is a program, else GL_FALSE.
 */
GLboolean GLAPIENTRY
_mesa_IsProgramARB(GLuint id)
{
   struct gl_program *prog = NULL; 
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);

   if (id == 0)
      return GL_FALSE;

   prog = _mesa_lookup_program(ctx, id);
   if (prog && (prog != &_mesa_DummyProgram))
      return GL_TRUE;
   else
      return GL_FALSE;
}


void GLAPIENTRY
_mesa_ProgramStringARB(GLenum target, GLenum format, GLsizei len,
                       const GLvoid *string)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   FLUSH_VERTICES(ctx, _NEW_PROGRAM);

   if (format != GL_PROGRAM_FORMAT_ASCII_ARB) {
      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(format)");
      return;
   }

   if (target == GL_VERTEX_PROGRAM_ARB
       && ctx->Extensions.ARB_vertex_program) {
      struct gl_vertex_program *prog = ctx->VertexProgram.Current;
      _mesa_parse_arb_vertex_program(ctx, target, string, len, prog);
      
      if (ctx->Program.ErrorPos == -1 && ctx->Driver.ProgramStringNotify)
	 ctx->Driver.ProgramStringNotify( ctx, target, &prog->Base );
   }
   else if (target == GL_FRAGMENT_PROGRAM_ARB
            && ctx->Extensions.ARB_fragment_program) {
      struct gl_fragment_program *prog = ctx->FragmentProgram.Current;
      _mesa_parse_arb_fragment_program(ctx, target, string, len, prog);

      if (ctx->Program.ErrorPos == -1 && ctx->Driver.ProgramStringNotify)
	 ctx->Driver.ProgramStringNotify( ctx, target, &prog->Base );
   }
   else {
      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramStringARB(target)");
      return;
   }
}


/**
 * Set a program env parameter register.
 * \note Called from the GL API dispatcher.
 * Note, this function is also used by the GL_NV_vertex_program extension
 * (alias to ProgramParameterdNV)
 */
void GLAPIENTRY
_mesa_ProgramEnvParameter4dARB(GLenum target, GLuint index,
                               GLdouble x, GLdouble y, GLdouble z, GLdouble w)
{
   _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) x, (GLfloat) y, 
		                  (GLfloat) z, (GLfloat) w);
}


/**
 * Set a program env parameter register.
 * \note Called from the GL API dispatcher.
 * Note, this function is also used by the GL_NV_vertex_program extension
 * (alias to ProgramParameterdvNV)
 */
void GLAPIENTRY
_mesa_ProgramEnvParameter4dvARB(GLenum target, GLuint index,
                                const GLdouble *params)
{
   _mesa_ProgramEnvParameter4fARB(target, index, (GLfloat) params[0], 
	                          (GLfloat) params[1], (GLfloat) params[2], 
				  (GLfloat) params[3]);
}


/**
 * Set a program env parameter register.
 * \note Called from the GL API dispatcher.
 * Note, this function is also used by the GL_NV_vertex_program extension
 * (alias to ProgramParameterfNV)
 */
void GLAPIENTRY
_mesa_ProgramEnvParameter4fARB(GLenum target, GLuint index,
                               GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   FLUSH_VERTICES(ctx, _NEW_PROGRAM);

   if (target == GL_FRAGMENT_PROGRAM_ARB
       && ctx->Extensions.ARB_fragment_program) {
      if (index >= ctx->Const.FragmentProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameter(index)");
         return;
      }
      ASSIGN_4V(ctx->FragmentProgram.Parameters[index], x, y, z, w);
   }
   else if (target == GL_VERTEX_PROGRAM_ARB /* == GL_VERTEX_PROGRAM_NV */
       && (ctx->Extensions.ARB_vertex_program || ctx->Extensions.NV_vertex_program)) {
      if (index >= ctx->Const.VertexProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameter(index)");
         return;
      }
      ASSIGN_4V(ctx->VertexProgram.Parameters[index], x, y, z, w);
   }
   else {
      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameter(target)");
      return;
   }
}

/**
 * Set a program env parameter register.
 * \note Called from the GL API dispatcher.
 * Note, this function is also used by the GL_NV_vertex_program extension
 * (alias to ProgramParameterfvNV)
 */
void GLAPIENTRY
_mesa_ProgramEnvParameter4fvARB(GLenum target, GLuint index,
                                   const GLfloat *params)
{
   _mesa_ProgramEnvParameter4fARB(target, index, params[0], params[1],
                                  params[2], params[3]);
}


void GLAPIENTRY
_mesa_ProgramEnvParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
				 const GLfloat *params)
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;
   GLfloat * dest;
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   FLUSH_VERTICES(ctx, _NEW_PROGRAM);

   if (count <= 0) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(count)");
   }

   if (target == GL_FRAGMENT_PROGRAM_ARB
       && ctx->Extensions.ARB_fragment_program) {
      if ((index + count) > ctx->Const.FragmentProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
         return;
      }
      dest = ctx->FragmentProgram.Parameters[index];
   }
   else if (target == GL_VERTEX_PROGRAM_ARB
       && ctx->Extensions.ARB_vertex_program) {
      if ((index + count) > ctx->Const.VertexProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramEnvParameters4fv(index + count)");
         return;
      }
      dest = ctx->VertexProgram.Parameters[index];
   }
   else {
      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramEnvParameters4fv(target)");
      return;
   }

   for ( i = 0 ; i < count ; i++ ) {
      COPY_4V(dest, params);
      params += 4;
      dest += 4;
   }
}


void GLAPIENTRY
_mesa_GetProgramEnvParameterdvARB(GLenum target, GLuint index,
                                  GLdouble *params)
{
   GET_CURRENT_CONTEXT(ctx);
   GLfloat fparams[4];

   _mesa_GetProgramEnvParameterfvARB(target, index, fparams);
   if (ctx->ErrorValue == GL_NO_ERROR) {
      params[0] = fparams[0];
      params[1] = fparams[1];
      params[2] = fparams[2];
      params[3] = fparams[3];
   }
}


void GLAPIENTRY
_mesa_GetProgramEnvParameterfvARB(GLenum target, GLuint index, 
                                  GLfloat *params)
{
   GET_CURRENT_CONTEXT(ctx);

   FLUSH_VERTICES(ctx, _NEW_PROGRAM);

   if (!ctx->_CurrentProgram)
      ASSERT_OUTSIDE_BEGIN_END(ctx);

   if (target == GL_FRAGMENT_PROGRAM_ARB
       && ctx->Extensions.ARB_fragment_program) {
      if (index >= ctx->Const.FragmentProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramEnvParameter(index)");
         return;
      }
      COPY_4V(params, ctx->FragmentProgram.Parameters[index]);
   }
   else if (target == GL_VERTEX_PROGRAM_ARB
       && ctx->Extensions.ARB_vertex_program) {
      if (index >= ctx->Const.VertexProgram.MaxEnvParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glGetProgramEnvParameter(index)");
         return;
      }
      COPY_4V(params, ctx->VertexProgram.Parameters[index]);
   }
   else {
      _mesa_error(ctx, GL_INVALID_ENUM, "glGetProgramEnvParameter(target)");
      return;
   }
}


/**
 * Note, this function is also used by the GL_NV_fragment_program extension.
 */
void GLAPIENTRY
_mesa_ProgramLocalParameter4fARB(GLenum target, GLuint index,
                                 GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
   GET_CURRENT_CONTEXT(ctx);
   struct gl_program *prog;
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   FLUSH_VERTICES(ctx, _NEW_PROGRAM);

   if ((target == GL_FRAGMENT_PROGRAM_NV
        && ctx->Extensions.NV_fragment_program) ||
       (target == GL_FRAGMENT_PROGRAM_ARB
        && ctx->Extensions.ARB_fragment_program)) {
      if (index >= ctx->Const.FragmentProgram.MaxLocalParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameterARB");
         return;
      }
      prog = &(ctx->FragmentProgram.Current->Base);
   }
   else if (target == GL_VERTEX_PROGRAM_ARB
            && ctx->Extensions.ARB_vertex_program) {
      if (index >= ctx->Const.VertexProgram.MaxLocalParams) {
         _mesa_error(ctx, GL_INVALID_VALUE, "glProgramLocalParameterARB");
         return;
      }
      prog = &(ctx->VertexProgram.Current->Base);
   }
   else {
      _mesa_error(ctx, GL_INVALID_ENUM, "glProgramLocalParameterARB");
      return;
   }

   ASSERT(index < MAX_PROGRAM_LOCAL_PARAMS);
   prog->LocalParams[index][0] = x;
   prog->LocalParams[index][1] = y;
   prog->LocalParams[index][2] = z;
   prog->LocalParams[index][3] = w;
}


/**
 * Note, this function is also used by the GL_NV_fragment_program extension.
 */
void GLAPIENTRY
_mesa_ProgramLocalParameter4fvARB(GLenum target, GLuint index,
                                  const GLfloat *params)
{
   _mesa_ProgramLocalParameter4fARB(target, index, params[0], params[1],
                                    params[2], params[3]);
}


void GLAPIENTRY
_mesa_ProgramLocalParameters4fvEXT(GLenum target, GLuint index, GLsizei count,
				   const GLfloat *params)