triangle.h File Reference

#include "types.h"

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Functions
void	gl_set_triangle_function (GLcontext *ctx)

Function Documentation

gl_set_triangle_function()

void gl_set_triangle_function

(

GLcontext *

ctx

)

Definition at line 708 of file triangle.c.

{
   GLboolean rgbmode = ctx->Visual->RGBAflag;
 
   if (ctx->RenderMode==GL_RENDER) {
      if (ctx->NoRaster) {
         ctx->Driver.TriangleFunc = null_triangle;
         return;
      }
      if (ctx->Driver.TriangleFunc) {
         /* Device driver will draw triangles. */
      }
      else if (ctx->Texture.Enabled
               && ctx->Texture.Current
               && ctx->Texture.Current->Complete) {
         if (   (ctx->Texture.Enabled==TEXTURE_2D)
             && ctx->Texture.Current2D->MinFilter==GL_NEAREST
             && ctx->Texture.Current2D->MagFilter==GL_NEAREST
             && ctx->Texture.Current2D->WrapS==GL_REPEAT
             && ctx->Texture.Current2D->WrapT==GL_REPEAT
             && ctx->Texture.Current2D->Image[0]->Format==GL_RGB
             && ctx->Texture.Current2D->Image[0]->Border==0
             && (ctx->Texture.EnvMode==GL_DECAL
                 || ctx->Texture.EnvMode==GL_REPLACE)
             && ctx->Hint.PerspectiveCorrection==GL_FASTEST
             && ctx->TextureMatrixType==MATRIX_IDENTITY
             && ((ctx->RasterMask==DEPTH_BIT
                  && ctx->Depth.Func==GL_LESS
                  && ctx->Depth.Mask==GL_TRUE)
                 || ctx->RasterMask==0)
             && ctx->Polygon.StippleFlag==GL_FALSE
             && ctx->Visual->EightBitColor) {
            if (ctx->RasterMask==DEPTH_BIT) {
               ctx->Driver.TriangleFunc = simple_z_textured_triangle;
            }
            else {
               ctx->Driver.TriangleFunc = simple_textured_triangle;
            }
         }
         else {
            GLboolean needLambda = GL_TRUE;
            /* if mag filter == min filter we're not mipmapping */
            if (ctx->Texture.Enabled & TEXTURE_2D) {
               if (ctx->Texture.Current2D->MinFilter==
                   ctx->Texture.Current2D->MagFilter) {
                  needLambda = GL_FALSE;
               }
            }
            else if (ctx->Texture.Enabled & TEXTURE_1D) {
               if (ctx->Texture.Current1D->MinFilter==
                   ctx->Texture.Current1D->MagFilter) {
                  needLambda = GL_FALSE;
               }
            }
            if (needLambda)
               ctx->Driver.TriangleFunc = lambda_textured_triangle;
            else
               ctx->Driver.TriangleFunc = general_textured_triangle;
         }
      }
      else {
     if (ctx->Light.ShadeModel==GL_SMOOTH) {
        /* smooth shaded, no texturing, stippled or some raster ops */
            if (rgbmode)
               ctx->Driver.TriangleFunc = smooth_rgba_triangle;
            else
               ctx->Driver.TriangleFunc = smooth_ci_triangle;
     }
     else {
        /* flat shaded, no texturing, stippled or some raster ops */
            if (rgbmode)
               ctx->Driver.TriangleFunc = flat_rgba_triangle;
            else
               ctx->Driver.TriangleFunc = flat_ci_triangle;
     }
      }
   }
   else if (ctx->RenderMode==GL_FEEDBACK) {
      ctx->Driver.TriangleFunc = feedback_triangle;
   }
   else {
      /* GL_SELECT mode */
      ctx->Driver.TriangleFunc = select_triangle;
   }
}

Referenced by gl_update_state().