static void fetch_texel_lod	(	GLcontext *	ctx,
		const GLfloat	texcoord[4],
		GLfloat	lambda,
		GLuint	unit,
		GLfloat	color[4]
	)		`[static]`

Fetch a texel with given lod. Called via machine->FetchTexelLod()

Definition at line 40 of file s_fragprog.c.

Referenced by init_machine().

{
   const struct gl_texture_object *texObj = ctx->Texture.Unit[unit]._Current;

   if (texObj) {
      SWcontext *swrast = SWRAST_CONTEXT(ctx);
      GLchan rgba[4];

      lambda = CLAMP(lambda, texObj->MinLod, texObj->MaxLod);

      /* XXX use a float-valued TextureSample routine here!!! */
      swrast->TextureSample[unit](ctx, texObj, 1,
                                  (const GLfloat (*)[4]) texcoord,
                                  &lambda, &rgba);
      color[0] = CHAN_TO_FLOAT(rgba[0]);
      color[1] = CHAN_TO_FLOAT(rgba[1]);
      color[2] = CHAN_TO_FLOAT(rgba[2]);
      color[3] = CHAN_TO_FLOAT(rgba[3]);
   }
   else {
      color[0] = color[1] = color[2] = 0.0F;
      color[3] = 1.0F;
   }
}

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