text: /*
   * Copyright 2000-2001 VA Linux Systems, Inc.
   * (C) Copyright IBM Corporation 2002, 2003
   * All Rights Reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * on the rights to use, copy, modify, merge, publish, distribute, sub
   * license, and/or sell copies of the Software, and to permit persons to whom
   * the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.  IN NO EVENT SHALL
   * VA LINUX SYSTEM, IBM AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
   * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
   * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
   * USE OR OTHER DEALINGS IN THE SOFTWARE.
   *
   * Authors:
   *    Keith Whitwell <keithw@tungstengraphics.com>
   *    Gareth Hughes <gareth@nvidia.com>
   */
  
  #include "spantmp_common.h"
  
  #ifndef DBG
  #define DBG 0
  #endif
  
  #ifndef HW_READ_CLIPLOOP
  #define HW_READ_CLIPLOOP()	HW_CLIPLOOP()
  #endif
  
  #ifndef HW_WRITE_CLIPLOOP
  #define HW_WRITE_CLIPLOOP()	HW_CLIPLOOP()
  #endif
  
  
  static void TAG(WriteRGBASpan)( GLcontext *ctx,
                                  struct gl_renderbuffer *rb,
  				GLuint n, GLint x, GLint y,
  				const void *values, const GLubyte mask[] )
  {
     HW_WRITE_LOCK()
        {
           const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
  	 GLint x1;
  	 GLint n1;
  	 LOCAL_VARS;
  
  	 y = Y_FLIP(y);
  
  	 HW_WRITE_CLIPLOOP()
  	    {
  	       GLint i = 0;
  	       CLIPSPAN(x,y,n,x1,n1,i);
  
  	       if (DBG) fprintf(stderr, "WriteRGBASpan %d..%d (x1 %d)\n",
  				(int)i, (int)n1, (int)x1);
  
  	       if (mask)
  	       {
  		  for (;n1>0;i++,x1++,n1--)
  		     if (mask[i])
  			WRITE_RGBA( x1, y,
  				    rgba[i][0], rgba[i][1],
  				    rgba[i][2], rgba[i][3] );
  	       }
  	       else
  	       {
  		  for (;n1>0;i++,x1++,n1--)
  		     WRITE_RGBA( x1, y,
  				 rgba[i][0], rgba[i][1],
  				 rgba[i][2], rgba[i][3] );
  	       }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_WRITE_UNLOCK();
  }
  
  static void TAG(WriteRGBSpan)( GLcontext *ctx,
                                 struct gl_renderbuffer *rb,
  			       GLuint n, GLint x, GLint y,
  			       const void *values, const GLubyte mask[] )
  {
     HW_WRITE_LOCK()
        {
           const GLubyte (*rgb)[3] = (const GLubyte (*)[3]) values;
  	 GLint x1;
  	 GLint n1;
  	 LOCAL_VARS;
  
  	 y = Y_FLIP(y);
  
  	 HW_WRITE_CLIPLOOP()
  	    {
  	       GLint i = 0;
  	       CLIPSPAN(x,y,n,x1,n1,i);
  
  	       if (DBG) fprintf(stderr, "WriteRGBSpan %d..%d (x1 %d)\n",
  				(int)i, (int)n1, (int)x1);
  
  	       if (mask)
  	       {
  		  for (;n1>0;i++,x1++,n1--)
  		     if (mask[i])
  			WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );
  	       }
  	       else
  	       {
  		  for (;n1>0;i++,x1++,n1--)
  		     WRITE_RGBA( x1, y, rgb[i][0], rgb[i][1], rgb[i][2], 255 );
  	       }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_WRITE_UNLOCK();
  }
  
  static void TAG(WriteRGBAPixels)( GLcontext *ctx,
                                    struct gl_renderbuffer *rb,
                                    GLuint n, const GLint x[], const GLint y[],
                                    const void *values, const GLubyte mask[] )
  {
     HW_WRITE_LOCK()
        {
           const GLubyte (*rgba)[4] = (const GLubyte (*)[4]) values;
  	 GLuint i;
  	 LOCAL_VARS;
  
  	 if (DBG) fprintf(stderr, "WriteRGBAPixels\n");
  
  	 HW_WRITE_CLIPLOOP()
  	    {
  	       if (mask)
  	       {
  	          for (i=0;i<n;i++)
  	          {
  		     if (mask[i]) {
  		        const int fy = Y_FLIP(y[i]);
  		        if (CLIPPIXEL(x[i],fy))
  			   WRITE_RGBA( x[i], fy,
  				       rgba[i][0], rgba[i][1],
  				       rgba[i][2], rgba[i][3] );
  		     }
  	          }
  	       }
  	       else
  	       {
  	          for (i=0;i<n;i++)
  	          {
  		     const int fy = Y_FLIP(y[i]);
  		     if (CLIPPIXEL(x[i],fy))
  			WRITE_RGBA( x[i], fy,
  				    rgba[i][0], rgba[i][1],
  				    rgba[i][2], rgba[i][3] );
  	          }
  	       }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_WRITE_UNLOCK();
  }
  
  
  static void TAG(WriteMonoRGBASpan)( GLcontext *ctx,	
                                      struct gl_renderbuffer *rb,
  				    GLuint n, GLint x, GLint y, 
  				    const void *value,
  				    const GLubyte mask[] )
  {
     HW_WRITE_LOCK()
        {
           const GLubyte *color = (const GLubyte *) value;
  	 GLint x1;
  	 GLint n1;
  	 LOCAL_VARS;
  	 INIT_MONO_PIXEL(p, color);
  
  	 y = Y_FLIP( y );
  
  	 if (DBG) fprintf(stderr, "WriteMonoRGBASpan\n");
  
  	 HW_WRITE_CLIPLOOP()
  	    {
  	       GLint i = 0;
  	       CLIPSPAN(x,y,n,x1,n1,i);
  	       if (mask)
  	       {
  	          for (;n1>0;i++,x1++,n1--)
  		     if (mask[i])
  		        WRITE_PIXEL( x1, y, p );
  	       }
  	       else
  	       {
  	          for (;n1>0;i++,x1++,n1--)
  		     WRITE_PIXEL( x1, y, p );
  	       }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_WRITE_UNLOCK();
  }
  
  
  static void TAG(WriteMonoRGBAPixels)( GLcontext *ctx,
                                        struct gl_renderbuffer *rb,
  				      GLuint n,
                                        const GLint x[], const GLint y[],
  				      const void *value,
                                        const GLubyte mask[] ) 
  {
     HW_WRITE_LOCK()
        {
           const GLubyte *color = (const GLubyte *) value;
  	 GLuint i;
  	 LOCAL_VARS;
  	 INIT_MONO_PIXEL(p, color);
  
  	 if (DBG) fprintf(stderr, "WriteMonoRGBAPixels\n");
  
  	 HW_WRITE_CLIPLOOP()
  	    {
  	       if (mask)
  	       {
  		  for (i=0;i<n;i++)
  		     if (mask[i]) {
  			int fy = Y_FLIP(y[i]);
  			if (CLIPPIXEL( x[i], fy ))
  			   WRITE_PIXEL( x[i], fy, p );
  		     }
  	       }
  	       else
  	       {
  		  for (i=0;i<n;i++) {
  		     int fy = Y_FLIP(y[i]);
  		     if (CLIPPIXEL( x[i], fy ))
  			WRITE_PIXEL( x[i], fy, p );
  		  }
  	       }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_WRITE_UNLOCK();
  }
  
  
  static void TAG(ReadRGBASpan)( GLcontext *ctx,
                                 struct gl_renderbuffer *rb,
  			       GLuint n, GLint x, GLint y,
  			       void *values)
  {
     HW_READ_LOCK()
        {
           GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
  	 GLint x1,n1;
  	 LOCAL_VARS;
  
  	 y = Y_FLIP(y);
  
  	 if (DBG) fprintf(stderr, "ReadRGBASpan\n");
  
  	 HW_READ_CLIPLOOP()
  	    {
  	       GLint i = 0;
  	       CLIPSPAN(x,y,n,x1,n1,i);
  	       for (;n1>0;i++,x1++,n1--)
  		  READ_RGBA( rgba[i], x1, y );
  	    }
           HW_ENDCLIPLOOP();
        }
     HW_READ_UNLOCK();
  }
  
  
  static void TAG(ReadRGBAPixels)( GLcontext *ctx,
                                   struct gl_renderbuffer *rb,
  				 GLuint n, const GLint x[], const GLint y[],
  				 void *values )
  {
     HW_READ_LOCK()
        {
           GLubyte (*rgba)[4] = (GLubyte (*)[4]) values;
  	 GLuint i;
  	 LOCAL_VARS;
  
  	 if (DBG) fprintf(stderr, "ReadRGBAPixels\n");
  
  	 HW_READ_CLIPLOOP()
  	    {
                 for (i=0;i<n;i++) {
                    int fy = Y_FLIP( y[i] );
                    if (CLIPPIXEL( x[i], fy ))
                       READ_RGBA( rgba[i], x[i], fy );
                 }
  	    }
  	 HW_ENDCLIPLOOP();
        }
     HW_READ_UNLOCK();
  }
  
  
  static void TAG(InitPointers)(struct gl_renderbuffer *rb)
  {
     rb->PutRow = TAG(WriteRGBASpan);
     rb->PutRowRGB = TAG(WriteRGBSpan);
     rb->PutMonoRow = TAG(WriteMonoRGBASpan);
     rb->PutValues = TAG(WriteRGBAPixels);
     rb->PutMonoValues = TAG(WriteMonoRGBAPixels);
     rb->GetValues = TAG(ReadRGBAPixels);
     rb->GetRow = TAG(ReadRGBASpan);
  }
  
  
  #undef WRITE_PIXEL
  #undef WRITE_RGBA
  #undef READ_RGBA
  #undef TAG
  