logic.h File Reference

#include "types.h"

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Go to the source code of this file.

Functions
void	gl_LogicOp (GLcontext *ctx, GLenum opcode)
void	gl_logicop_ci_span (GLcontext *ctx, GLuint n, GLint x, GLint y, GLuint index[], GLubyte mask[])
void	gl_logicop_ci_pixels (GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLuint index[], GLubyte mask[])
void	gl_logicop_rgba_span (GLcontext *ctx, GLuint n, GLint x, GLint y, GLubyte red[], GLubyte green[], GLubyte blue[], GLubyte alpha[], GLubyte mask[])
void	gl_logicop_rgba_pixels (GLcontext *ctx, GLuint n, const GLint x[], const GLint y[], GLubyte red[], GLubyte green[], GLubyte blue[], GLubyte alpha[], GLubyte mask[])

Function Documentation

gl_LogicOp()

void gl_LogicOp	(	GLcontext *	ctx,
		GLenum	opcode
	)

Definition at line 66 of file logic.c.

{
   if (INSIDE_BEGIN_END(ctx)) {
      gl_error( ctx, GL_INVALID_OPERATION, "glLogicOp" );
      return;
   }
   switch (opcode) {
      case GL_CLEAR:
      case GL_SET:
      case GL_COPY:
      case GL_COPY_INVERTED:
      case GL_NOOP:
      case GL_INVERT:
      case GL_AND:
      case GL_NAND:
      case GL_OR:
      case GL_NOR:
      case GL_XOR:
      case GL_EQUIV:
      case GL_AND_REVERSE:
      case GL_AND_INVERTED:
      case GL_OR_REVERSE:
      case GL_OR_INVERTED:
         ctx->Color.LogicOp = opcode;
         ctx->NewState |= NEW_RASTER_OPS;
     return;
      default:
         gl_error( ctx, GL_INVALID_ENUM, "glLogicOp" );
     return;
   }
}

Referenced by execute_list(), and init_exec_pointers().

gl_logicop_ci_pixels()

void gl_logicop_ci_pixels	(	GLcontext *	ctx,
		GLuint	n,
		const GLint	x[],
		const GLint	y[],
		GLuint	index[],
		GLubyte	mask[]
	)

Definition at line 234 of file logic.c.

{
   GLuint dest[PB_SIZE];
   GLuint i;
 
   /* Read dest values from frame buffer */
   (*ctx->Driver.ReadIndexPixels)( ctx, n, x, y, dest, mask );
 
   switch (ctx->Color.LogicOp) {
      case GL_CLEAR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = 0;
        }
     }
     break;
      case GL_SET:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = 1;
        }
     }
     break;
      case GL_COPY:
     /* do nothing */
     break;
      case GL_COPY_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i];
        }
     }
     break;
      case GL_NOOP:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = dest[i];
        }
     }
     break;
      case GL_INVERT:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~dest[i];
        }
     }
     break;
      case GL_AND:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] &= dest[i];
        }
     }
     break;
      case GL_NAND:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] & dest[i]);
        }
     }
     break;
      case GL_OR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] |= dest[i];
        }
     }
     break;
      case GL_NOR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] | dest[i]);
        }
     }
     break;
      case GL_XOR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] ^= dest[i];
        }
     }
     break;
      case GL_EQUIV:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] ^ dest[i]);
        }
     }
     break;
      case GL_AND_REVERSE:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = index[i] & ~dest[i];
        }
     }
     break;
      case GL_AND_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i] & dest[i];
        }
     }
     break;
      case GL_OR_REVERSE:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = index[i] | ~dest[i];
        }
     }
     break;
      case GL_OR_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i] | dest[i];
        }
     }
     break;
      default:
     gl_error( ctx, GL_INVALID_ENUM, "gl_logic_pixels error" );
   }
}

Referenced by gl_flush_pb().

gl_logicop_ci_span()

void gl_logicop_ci_span	(	GLcontext *	ctx,
		GLuint	n,
		GLint	x,
		GLint	y,
		GLuint	index[],
		GLubyte	mask[]
	)

Definition at line 105 of file logic.c.

{
   GLuint dest[MAX_WIDTH];
   GLuint i;
 
   /* Read dest values from frame buffer */
   (*ctx->Driver.ReadIndexSpan)( ctx, n, x, y, dest );
 
   switch (ctx->Color.LogicOp) {
      case GL_CLEAR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = 0;
        }
     }
     break;
      case GL_SET:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = 1;
        }
     }
     break;
      case GL_COPY:
     /* do nothing */
     break;
      case GL_COPY_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i];
        }
     }
     break;
      case GL_NOOP:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = dest[i];
        }
     }
     break;
      case GL_INVERT:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~dest[i];
        }
     }
     break;
      case GL_AND:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] &= dest[i];
        }
     }
     break;
      case GL_NAND:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] & dest[i]);
        }
     }
     break;
      case GL_OR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] |= dest[i];
        }
     }
     break;
      case GL_NOR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] | dest[i]);
        }
     }
     break;
      case GL_XOR:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] ^= dest[i];
        }
     }
     break;
      case GL_EQUIV:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~(index[i] ^ dest[i]);
        }
     }
     break;
      case GL_AND_REVERSE:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = index[i] & ~dest[i];
        }
     }
     break;
      case GL_AND_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i] & dest[i];
        }
     }
     break;
      case GL_OR_REVERSE:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = index[i] | ~dest[i];
        }
     }
     break;
      case GL_OR_INVERTED:
         for (i=0;i<n;i++) {
        if (mask[i]) {
           index[i] = ~index[i] | dest[i];
        }
     }
     break;
      default:
     gl_error( ctx, GL_INVALID_ENUM, "gl_logic error" );
   }
}

Referenced by gl_write_index_span(), and gl_write_monoindex_span().

gl_logicop_rgba_pixels()

void gl_logicop_rgba_pixels	(	GLcontext *	ctx,
		GLuint	n,
		const GLint	x[],
		const GLint	y[],
		GLubyte	red[],
		GLubyte	green[],
		GLubyte	blue[],
		GLubyte	alpha[],
		GLubyte	mask[]
	)

Definition at line 548 of file logic.c.

{
   GLubyte rdest[PB_SIZE], gdest[PB_SIZE], bdest[PB_SIZE], adest[PB_SIZE];
   GLuint i;
 
   /* Read pixels from current color buffer */
   (*ctx->Driver.ReadColorPixels)( ctx, n, x, y, rdest, gdest, bdest, adest, mask );
   if (ctx->RasterMask & ALPHABUF_BIT) {
      gl_read_alpha_pixels( ctx, n, x, y, adest, mask );
   }
 
   /* apply logic op */
   switch (ctx->Color.LogicOp) {
      case GL_CLEAR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i] = green[i] = blue[i] = alpha[i] = 0;
            }
         }
         break;
      case GL_SET:
         {
            GLubyte r = (GLint) ctx->Visual->RedScale;
            GLubyte g = (GLint) ctx->Visual->GreenScale;
            GLubyte b = (GLint) ctx->Visual->BlueScale;
            GLubyte a = (GLint) ctx->Visual->AlphaScale;
            for (i=0;i<n;i++) {
               if (mask[i]) {
                  red[i]   = r;
                  green[i] = g;
                  blue[i]  = b;
                  alpha[i] = a;
               }
            }
         }
         break;
      case GL_COPY:
         /* do nothing */
         break;
      case GL_COPY_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i];
               green[i] = ~green[i];
               blue[i]  = ~blue[i];
               alpha[i] = ~alpha[i];
            }
         }
         break;
      case GL_NOOP:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = rdest[i];
               green[i] = gdest[i];
               blue[i]  = bdest[i];
               alpha[i] = adest[i];
            }
         }
         break;
      case GL_INVERT:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~rdest[i];
               green[i] = ~gdest[i];
               blue[i]  = ~bdest[i];
               alpha[i] = ~adest[i];
            }
         }
         break;
      case GL_AND:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   &= rdest[i];
               green[i] &= gdest[i];
               blue[i]  &= bdest[i];
               alpha[i] &= adest[i];
            }
         }
         break;
      case GL_NAND:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   & rdest[i]);
               green[i] = ~(green[i] & gdest[i]);
               blue[i]  = ~(blue[i]  & bdest[i]);
               alpha[i] = ~(alpha[i] & adest[i]);
            }
         }
         break;
      case GL_OR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   |= rdest[i];
               green[i] |= gdest[i];
               blue[i]  |= bdest[i];
               alpha[i] |= adest[i];
            }
         }
         break;
      case GL_NOR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   | rdest[i]);
               green[i] = ~(green[i] | gdest[i]);
               blue[i]  = ~(blue[i]  | bdest[i]);
               alpha[i] = ~(alpha[i] | adest[i]);
            }
         }
         break;
      case GL_XOR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   ^= rdest[i];
               green[i] ^= gdest[i];
               blue[i]  ^= bdest[i];
               alpha[i] ^= adest[i];
            }
         }
         break;
      case GL_EQUIV:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   ^ rdest[i]);
               green[i] = ~(green[i] ^ gdest[i]);
               blue[i]  = ~(blue[i]  ^ bdest[i]);
               alpha[i] = ~(alpha[i] ^ adest[i]);
            }
         }
         break;
      case GL_AND_REVERSE:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = red[i]   & ~rdest[i];
               green[i] = green[i] & ~gdest[i];
               blue[i]  = blue[i]  & ~bdest[i];
               alpha[i] = alpha[i] & ~adest[i];
            }
         }
         break;
      case GL_AND_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i]   & rdest[i];
               green[i] = ~green[i] & gdest[i];
               blue[i]  = ~blue[i]  & bdest[i];
               alpha[i] = ~alpha[i] & adest[i];
            }
         }
         break;
      case GL_OR_REVERSE:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = red[i]   | ~rdest[i];
               green[i] = green[i] | ~gdest[i];
               blue[i]  = blue[i]  | ~bdest[i];
               alpha[i] = alpha[i] | ~adest[i];
            }
         }
         break;
      case GL_OR_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i]   | rdest[i];
               green[i] = ~green[i] | gdest[i];
               blue[i]  = ~blue[i]  | bdest[i];
               alpha[i] = ~alpha[i] | adest[i];
            }
         }
         break;
      default:
         /* should never happen */
         gl_problem(ctx, "Bad function in gl_logicop_rgba_pixels");
         return;
   }
}

Referenced by gl_flush_pb().

gl_logicop_rgba_span()

void gl_logicop_rgba_span	(	GLcontext *	ctx,
		GLuint	n,
		GLint	x,
		GLint	y,
		GLubyte	red[],
		GLubyte	green[],
		GLubyte	blue[],
		GLubyte	alpha[],
		GLubyte	mask[]
	)

Definition at line 364 of file logic.c.

{
   GLubyte rdest[MAX_WIDTH], gdest[MAX_WIDTH];
   GLubyte bdest[MAX_WIDTH], adest[MAX_WIDTH];
   GLuint i;
 
   /* Read span of current frame buffer pixels */
   gl_read_color_span( ctx, n, x, y, rdest, gdest, bdest, adest );
 
   /* apply logic op */
   switch (ctx->Color.LogicOp) {
      case GL_CLEAR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i] = green[i] = blue[i] = alpha[i] = 0;
            }
         }
         break;
      case GL_SET:
         {
            GLubyte r = (GLint) ctx->Visual->RedScale;
            GLubyte g = (GLint) ctx->Visual->GreenScale;
            GLubyte b = (GLint) ctx->Visual->BlueScale;
            GLubyte a = (GLint) ctx->Visual->AlphaScale;
            for (i=0;i<n;i++) {
               if (mask[i]) {
                  red[i]   = r;
                  green[i] = g;
                  blue[i]  = b;
                  alpha[i] = a;
               }
            }
         }
         break;
      case GL_COPY:
         /* do nothing */
         break;
      case GL_COPY_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i];
               green[i] = ~green[i];
               blue[i]  = ~blue[i];
               alpha[i] = ~alpha[i];
            }
         }
         break;
      case GL_NOOP:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = rdest[i];
               green[i] = gdest[i];
               blue[i]  = bdest[i];
               alpha[i] = adest[i];
            }
         }
         break;
      case GL_INVERT:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~rdest[i];
               green[i] = ~gdest[i];
               blue[i]  = ~bdest[i];
               alpha[i] = ~adest[i];
            }
         }
         break;
      case GL_AND:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   &= rdest[i];
               green[i] &= gdest[i];
               blue[i]  &= bdest[i];
               alpha[i] &= adest[i];
            }
         }
         break;
      case GL_NAND:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   & rdest[i]);
               green[i] = ~(green[i] & gdest[i]);
               blue[i]  = ~(blue[i]  & bdest[i]);
               alpha[i] = ~(alpha[i] & adest[i]);
            }
         }
         break;
      case GL_OR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   |= rdest[i];
               green[i] |= gdest[i];
               blue[i]  |= bdest[i];
               alpha[i] |= adest[i];
            }
         }
         break;
      case GL_NOR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   | rdest[i]);
               green[i] = ~(green[i] | gdest[i]);
               blue[i]  = ~(blue[i]  | bdest[i]);
               alpha[i] = ~(alpha[i] | adest[i]);
            }
         }
         break;
      case GL_XOR:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   ^= rdest[i];
               green[i] ^= gdest[i];
               blue[i]  ^= bdest[i];
               alpha[i] ^= adest[i];
            }
         }
         break;
      case GL_EQUIV:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~(red[i]   ^ rdest[i]);
               green[i] = ~(green[i] ^ gdest[i]);
               blue[i]  = ~(blue[i]  ^ bdest[i]);
               alpha[i] = ~(alpha[i] ^ adest[i]);
            }
         }
         break;
      case GL_AND_REVERSE:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = red[i]   & ~rdest[i];
               green[i] = green[i] & ~gdest[i];
               blue[i]  = blue[i]  & ~bdest[i];
               alpha[i] = alpha[i] & ~adest[i];
            }
         }
         break;
      case GL_AND_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i]   & rdest[i];
               green[i] = ~green[i] & gdest[i];
               blue[i]  = ~blue[i]  & bdest[i];
               alpha[i] = ~alpha[i] & adest[i];
            }
         }
         break;
      case GL_OR_REVERSE:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = red[i]   | ~rdest[i];
               green[i] = green[i] | ~gdest[i];
               blue[i]  = blue[i]  | ~bdest[i];
               alpha[i] = alpha[i] | ~adest[i];
            }
         }
         break;
      case GL_OR_INVERTED:
         for (i=0;i<n;i++) {
            if (mask[i]) {
               red[i]   = ~red[i]   | rdest[i];
               green[i] = ~green[i] | gdest[i];
               blue[i]  = ~blue[i]  | bdest[i];
               alpha[i] = ~alpha[i] | adest[i];
            }
         }
         break;
      default:
         /* should never happen */
         gl_problem(ctx, "Bad function in gl_logicop_rgba_span");
         return;
   }
}

Referenced by gl_write_color_span(), gl_write_monocolor_span(), and gl_write_texture_span().