t_vertex_generic.c

winNT技术操作系统,国外开放的原代码和LIUX一样

static INLINE void insert_4ub_4f_bgra_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[0] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_bgra_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   v[1] = 0;
   v[0] = 0;
   v[3] = 0xff;
}

static INLINE void insert_4ub_4f_argb_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[3]);
}

static INLINE void insert_4ub_4f_argb_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[2]);
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_argb_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   v[3] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_argb_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[0]);
   v[2] = 0x00;
   v[3] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_4( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[2]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[3]);
}

static INLINE void insert_4ub_4f_abgr_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[2]);
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[1]);
   v[1] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_4ub_4f_abgr_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[3], in[0]);
   v[2] = 0x00;
   v[1] = 0x00;
   v[0] = 0xff;
}

static INLINE void insert_3ub_3f_rgb_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[2]);
}

static INLINE void insert_3ub_3f_rgb_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[2] = 0;
}

static INLINE void insert_3ub_3f_rgb_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
			       const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
   v[1] = 0;
   v[2] = 0;
}

static INLINE void insert_3ub_3f_bgr_3( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[2]);
}

static INLINE void insert_3ub_3f_bgr_2( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   UNCLAMPED_FLOAT_TO_UBYTE(v[1], in[1]);
   v[0] = 0;
}

static INLINE void insert_3ub_3f_bgr_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
				 const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[2], in[0]);
   v[1] = 0;
   v[0] = 0;
}


static INLINE void insert_1ub_1f_1( const struct tnl_clipspace_attr *a, GLubyte *v, 
			   const GLfloat *in )
{
   (void) a;
   UNCLAMPED_FLOAT_TO_UBYTE(v[0], in[0]);
}


/***********************************************************************
 * Functions to perform the reverse operations to the above, for
 * swrast translation and clip-interpolation.
 * 
 * Currently always extracts a full 4 floats.
 */

static void extract_4f_viewport( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   /* Although included for completeness, the position coordinate is
    * usually handled differently during clipping.
    */
   out[0] = (in[0] - vp[12]) / vp[0];
   out[1] = (in[1] - vp[13]) / vp[5];
   out[2] = (in[2] - vp[14]) / vp[10];
   out[3] = in[3];
}

static void extract_3f_viewport( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = (in[0] - vp[12]) / vp[0];
   out[1] = (in[1] - vp[13]) / vp[5];
   out[2] = (in[2] - vp[14]) / vp[10];
   out[3] = 1;
}


static void extract_2f_viewport( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   const GLfloat * const vp = a->vp;
   
   out[0] = (in[0] - vp[12]) / vp[0];
   out[1] = (in[1] - vp[13]) / vp[5];
   out[2] = 0;
   out[3] = 1;
}


static void extract_4f( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v  )
{
   const GLfloat *in = (const GLfloat *)v;
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[2];
   out[3] = in[3];
}

static void extract_3f_xyw( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = 0;
   out[3] = in[2];
}


static void extract_3f( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = in[2];
   out[3] = 1;
}


static void extract_2f( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   (void) a;
   
   out[0] = in[0];
   out[1] = in[1];
   out[2] = 0;
   out[3] = 1;
}

static void extract_1f( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v )
{
   const GLfloat *in = (const GLfloat *)v;
   (void) a;
   
   out[0] = in[0];
   out[1] = 0;
   out[2] = 0;
   out[3] = 1;
}

static void extract_4chan_4f_rgba( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   GLchan *c = (GLchan *)v;
   (void) a;

   out[0] = CHAN_TO_FLOAT(c[0]);
   out[1] = CHAN_TO_FLOAT(c[1]);
   out[2] = CHAN_TO_FLOAT(c[2]);
   out[3] = CHAN_TO_FLOAT(c[3]);
}

static void extract_4ub_4f_rgba( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   (void) a;
   out[0] = UBYTE_TO_FLOAT(v[0]);
   out[1] = UBYTE_TO_FLOAT(v[1]);
   out[2] = UBYTE_TO_FLOAT(v[2]);
   out[3] = UBYTE_TO_FLOAT(v[3]);
}

static void extract_4ub_4f_bgra( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   (void) a;
   out[2] = UBYTE_TO_FLOAT(v[0]);
   out[1] = UBYTE_TO_FLOAT(v[1]);
   out[0] = UBYTE_TO_FLOAT(v[2]);
   out[3] = UBYTE_TO_FLOAT(v[3]);
}

static void extract_4ub_4f_argb( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   (void) a;
   out[3] = UBYTE_TO_FLOAT(v[0]);
   out[0] = UBYTE_TO_FLOAT(v[1]);
   out[1] = UBYTE_TO_FLOAT(v[2]);
   out[2] = UBYTE_TO_FLOAT(v[3]);
}

static void extract_4ub_4f_abgr( const struct tnl_clipspace_attr *a, GLfloat *out, 
				 const GLubyte *v )
{
   (void) a;
   out[3] = UBYTE_TO_FLOAT(v[0]);
   out[2] = UBYTE_TO_FLOAT(v[1]);
   out[1] = UBYTE_TO_FLOAT(v[2]);
   out[0] = UBYTE_TO_FLOAT(v[3]);
}

static void extract_3ub_3f_rgb( const struct tnl_clipspace_attr *a, GLfloat *out, 
				const GLubyte *v )
{
   (void) a;
   out[0] = UBYTE_TO_FLOAT(v[0]);
   out[1] = UBYTE_TO_FLOAT(v[1]);
   out[2] = UBYTE_TO_FLOAT(v[2]);
   out[3] = 1;
}

static void extract_3ub_3f_bgr( const struct tnl_clipspace_attr *a, GLfloat *out, 
				const GLubyte *v )
{
   (void) a;
   out[2] = UBYTE_TO_FLOAT(v[0]);
   out[1] = UBYTE_TO_FLOAT(v[1]);
   out[0] = UBYTE_TO_FLOAT(v[2]);
   out[3] = 1;
}

static void extract_1ub_1f( const struct tnl_clipspace_attr *a, GLfloat *out, const GLubyte *v )
{
   (void) a;
   out[0] = UBYTE_TO_FLOAT(v[0]);
   out[1] = 0;
   out[2] = 0;
   out[3] = 1;
}


const struct tnl_format_info _tnl_format_info[EMIT_MAX] = 
{
   { "1f",
     extract_1f,
     { insert_1f_1, insert_1f_1, insert_1f_1, insert_1f_1 },
     sizeof(GLfloat) },

   { "2f",
     extract_2f,
     { insert_2f_1, insert_2f_2, insert_2f_2, insert_2f_2 },
     2 * sizeof(GLfloat) },

   { "3f",
     extract_3f,
     { insert_3f_1, insert_3f_2, insert_3f_3, insert_3f_3 },
     3 * sizeof(GLfloat) },

   { "4f",
     extract_4f,
     { insert_4f_1, insert_4f_2, insert_4f_3, insert_4f_4 },
     4 * sizeof(GLfloat) },

   { "2f_viewport",
     extract_2f_viewport,