X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fglu%2Fmesa%2Fmipmap.c;h=e5efc6240f5f630f2c6e449f0dabe61526862bd9;hb=b1394fa92aaaf859ce9efc8b5fc194397921320c;hp=3c4834cff7b5bd6e2faa58351c83cba7e064d1a9;hpb=26a89579e44d49c397e91bcf9435a1f198ae8ecc;p=mesa.git

diff --git a/src/glu/mesa/mipmap.c b/src/glu/mesa/mipmap.c
index 3c4834cff7b..e5efc6240f5 100644
--- a/src/glu/mesa/mipmap.c
+++ b/src/glu/mesa/mipmap.c
@@ -1,4 +1,4 @@
-/* $Id: mipmap.c,v 1.5 2000/02/28 14:51:43 brianp Exp $ */
+/* $Id: mipmap.c,v 1.7 2000/07/11 14:11:04 brianp Exp $ */
 
 /*
  * Mesa 3-D graphics library
@@ -47,18 +47,21 @@
 
 /* To work around optimizer bug in MSVC4.1 */
 #if defined(__WIN32__) && !defined(OPENSTEP)
-void dummy(GLuint j, GLuint k){
+void
+dummy(GLuint j, GLuint k)
+{
 }
 #else
 #define dummy(J, K)
 #endif
 
 
-GLint GLAPIENTRY gluScaleImage( GLenum format,
-                              GLsizei widthin, GLsizei heightin,
-                              GLenum typein, const void *datain,
-                              GLsizei widthout, GLsizei heightout,
-                              GLenum typeout, void *dataout )
+GLint GLAPIENTRY
+gluScaleImage(GLenum format,
+	      GLsizei widthin, GLsizei heightin,
+	      GLenum typein, const void *datain,
+	      GLsizei widthout, GLsizei heightout,
+	      GLenum typeout, void *dataout)
 {
    GLint components, i, j, k;
    GLfloat *tempin, *tempout;
@@ -71,84 +74,112 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
 
    /* Determine number of components per pixel */
    switch (format) {
-      case GL_COLOR_INDEX:
-      case GL_STENCIL_INDEX:
-      case GL_DEPTH_COMPONENT:
-      case GL_RED:
-      case GL_GREEN:
-      case GL_BLUE:
-      case GL_ALPHA:
-      case GL_LUMINANCE:
-         components = 1;
-	 break;
-      case GL_LUMINANCE_ALPHA:
-	 components = 2;
-	 break;
-      case GL_RGB:
-      case GL_BGR:
-	 components = 3;
-	 break;
-      case GL_RGBA:
-      case GL_BGRA:
+   case GL_COLOR_INDEX:
+   case GL_STENCIL_INDEX:
+   case GL_DEPTH_COMPONENT:
+   case GL_RED:
+   case GL_GREEN:
+   case GL_BLUE:
+   case GL_ALPHA:
+   case GL_LUMINANCE:
+      components = 1;
+      break;
+   case GL_LUMINANCE_ALPHA:
+      components = 2;
+      break;
+   case GL_RGB:
+   case GL_BGR:
+      components = 3;
+      break;
+   case GL_RGBA:
+   case GL_BGRA:
 #ifdef GL_EXT_abgr
-      case GL_ABGR_EXT:
+   case GL_ABGR_EXT:
 #endif
-	 components = 4;
-	 break;
-      default:
-	 return GLU_INVALID_ENUM;
+      components = 4;
+      break;
+   default:
+      return GLU_INVALID_ENUM;
    }
 
    /* Determine bytes per input datum */
    switch (typein) {
-      case GL_UNSIGNED_BYTE:	sizein = sizeof(GLubyte);	break;
-      case GL_BYTE:		sizein = sizeof(GLbyte);	break;
-      case GL_UNSIGNED_SHORT:	sizein = sizeof(GLushort);	break;
-      case GL_SHORT:		sizein = sizeof(GLshort);	break;
-      case GL_UNSIGNED_INT:	sizein = sizeof(GLuint);	break;
-      case GL_INT:		sizein = sizeof(GLint);		break;
-      case GL_FLOAT:		sizein = sizeof(GLfloat);	break;
-      case GL_BITMAP:
-	 /* not implemented yet */
-      default:
-	 return GL_INVALID_ENUM;
+   case GL_UNSIGNED_BYTE:
+      sizein = sizeof(GLubyte);
+      break;
+   case GL_BYTE:
+      sizein = sizeof(GLbyte);
+      break;
+   case GL_UNSIGNED_SHORT:
+      sizein = sizeof(GLushort);
+      break;
+   case GL_SHORT:
+      sizein = sizeof(GLshort);
+      break;
+   case GL_UNSIGNED_INT:
+      sizein = sizeof(GLuint);
+      break;
+   case GL_INT:
+      sizein = sizeof(GLint);
+      break;
+   case GL_FLOAT:
+      sizein = sizeof(GLfloat);
+      break;
+   case GL_BITMAP:
+      /* not implemented yet */
+   default:
+      return GL_INVALID_ENUM;
    }
 
    /* Determine bytes per output datum */
    switch (typeout) {
-      case GL_UNSIGNED_BYTE:	sizeout = sizeof(GLubyte);	break;
-      case GL_BYTE:		sizeout = sizeof(GLbyte);	break;
-      case GL_UNSIGNED_SHORT:	sizeout = sizeof(GLushort);	break;
-      case GL_SHORT:		sizeout = sizeof(GLshort);	break;
-      case GL_UNSIGNED_INT:	sizeout = sizeof(GLuint);	break;
-      case GL_INT:		sizeout = sizeof(GLint);	break;
-      case GL_FLOAT:		sizeout = sizeof(GLfloat);	break;
-      case GL_BITMAP:
-	 /* not implemented yet */
-      default:
-	 return GL_INVALID_ENUM;
+   case GL_UNSIGNED_BYTE:
+      sizeout = sizeof(GLubyte);
+      break;
+   case GL_BYTE:
+      sizeout = sizeof(GLbyte);
+      break;
+   case GL_UNSIGNED_SHORT:
+      sizeout = sizeof(GLushort);
+      break;
+   case GL_SHORT:
+      sizeout = sizeof(GLshort);
+      break;
+   case GL_UNSIGNED_INT:
+      sizeout = sizeof(GLuint);
+      break;
+   case GL_INT:
+      sizeout = sizeof(GLint);
+      break;
+   case GL_FLOAT:
+      sizeout = sizeof(GLfloat);
+      break;
+   case GL_BITMAP:
+      /* not implemented yet */
+   default:
+      return GL_INVALID_ENUM;
    }
 
    /* Get glPixelStore state */
-   glGetIntegerv( GL_UNPACK_ROW_LENGTH, &unpackrowlength );
-   glGetIntegerv( GL_UNPACK_ALIGNMENT, &unpackalignment );
-   glGetIntegerv( GL_UNPACK_SKIP_ROWS, &unpackskiprows );
-   glGetIntegerv( GL_UNPACK_SKIP_PIXELS, &unpackskippixels );
-   glGetIntegerv( GL_PACK_ROW_LENGTH, &packrowlength );
-   glGetIntegerv( GL_PACK_ALIGNMENT, &packalignment );
-   glGetIntegerv( GL_PACK_SKIP_ROWS, &packskiprows );
-   glGetIntegerv( GL_PACK_SKIP_PIXELS, &packskippixels );
+   glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
+   glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
+   glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
+   glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
+   glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
+   glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
+   glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
+   glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
 
    /* Allocate storage for intermediate images */
-   tempin = (GLfloat *) malloc( widthin * heightin
-			        * components * sizeof(GLfloat) );
+   tempin = (GLfloat *) malloc(widthin * heightin
+			       * components * sizeof(GLfloat));
    if (!tempin) {
       return GLU_OUT_OF_MEMORY;
    }
-   tempout = (GLfloat *) malloc( widthout * heightout
-		 	         * components * sizeof(GLfloat) );
+   tempout = (GLfloat *) malloc(widthout * heightout
+				* components * sizeof(GLfloat));
    if (!tempout) {
-      free( tempin );
+      free(tempin);
       return GLU_OUT_OF_MEMORY;
    }
 
@@ -157,7 +188,7 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
     * Unpack the pixel data and convert to floating point
     */
 
-   if (unpackrowlength>0) {
+   if (unpackrowlength > 0) {
       rowlen = unpackrowlength;
    }
    else {
@@ -167,104 +198,97 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
       rowstride = components * rowlen;
    }
    else {
-      rowstride = unpackalignment/sizein
-	        * CEILING( components * rowlen * sizein, unpackalignment );
+      rowstride = unpackalignment / sizein
+	 * CEILING(components * rowlen * sizein, unpackalignment);
    }
 
    switch (typein) {
-      case GL_UNSIGNED_BYTE:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLubyte *ubptr = (GLubyte *) datain
-	                   + i * rowstride
-			   + unpackskiprows * rowstride
-			   + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *ubptr++;
-	    }
+   case GL_UNSIGNED_BYTE:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLubyte *ubptr = (GLubyte *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * ubptr++;
 	 }
-	 break;
-      case GL_BYTE:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLbyte *bptr = (GLbyte *) datain
-	                 + i * rowstride
-			 + unpackskiprows * rowstride
-			 + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *bptr++;
-	    }
+      }
+      break;
+   case GL_BYTE:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLbyte *bptr = (GLbyte *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * bptr++;
 	 }
-	 break;
-      case GL_UNSIGNED_SHORT:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLushort *usptr = (GLushort *) datain
-	                    + i * rowstride
-			    + unpackskiprows * rowstride
-			    + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *usptr++;
-	    }
+      }
+      break;
+   case GL_UNSIGNED_SHORT:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLushort *usptr = (GLushort *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * usptr++;
 	 }
-	 break;
-      case GL_SHORT:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLshort *sptr = (GLshort *) datain
-	                  + i * rowstride
-			  + unpackskiprows * rowstride
-			  + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *sptr++;
-	    }
+      }
+      break;
+   case GL_SHORT:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLshort *sptr = (GLshort *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * sptr++;
 	 }
-	 break;
-      case GL_UNSIGNED_INT:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLuint *uiptr = (GLuint *) datain
-	                  + i * rowstride
-			  + unpackskiprows * rowstride
-			  + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *uiptr++;
-	    }
+      }
+      break;
+   case GL_UNSIGNED_INT:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLuint *uiptr = (GLuint *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * uiptr++;
 	 }
-	 break;
-      case GL_INT:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLint *iptr = (GLint *) datain
-	                + i * rowstride
-			+ unpackskiprows * rowstride
-			+ unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = (GLfloat) *iptr++;
-	    }
+      }
+      break;
+   case GL_INT:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLint *iptr = (GLint *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = (GLfloat) * iptr++;
 	 }
-	 break;
-      case GL_FLOAT:
-	 k = 0;
-	 for (i=0;i<heightin;i++) {
-	    GLfloat *fptr = (GLfloat *) datain
-	                  + i * rowstride
-			  + unpackskiprows * rowstride
-			  + unpackskippixels * components;
-	    for (j=0;j<widthin*components;j++) {
-               dummy(j, k);
-	       tempin[k++] = *fptr++;
-	    }
+      }
+      break;
+   case GL_FLOAT:
+      k = 0;
+      for (i = 0; i < heightin; i++) {
+	 GLfloat *fptr = (GLfloat *) datain
+	    + i * rowstride
+	    + unpackskiprows * rowstride + unpackskippixels * components;
+	 for (j = 0; j < widthin * components; j++) {
+	    dummy(j, k);
+	    tempin[k++] = *fptr++;
 	 }
-	 break;
-      default:
-	 return GLU_INVALID_ENUM;
+      }
+      break;
+   default:
+      return GLU_INVALID_ENUM;
    }
 
 
@@ -273,31 +297,31 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
     */
 
    if (widthout > 1)
-      sx = (GLfloat) (widthin-1) / (GLfloat) (widthout-1);
+      sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
    else
-      sx = (GLfloat) (widthin-1);
+      sx = (GLfloat) (widthin - 1);
    if (heightout > 1)
-      sy = (GLfloat) (heightin-1) / (GLfloat) (heightout-1);
+      sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
    else
-      sy = (GLfloat) (heightin-1);
+      sy = (GLfloat) (heightin - 1);
 
 /*#define POINT_SAMPLE*/
 #ifdef POINT_SAMPLE
-   for (i=0;i<heightout;i++) {
+   for (i = 0; i < heightout; i++) {
       GLint ii = i * sy;
-      for (j=0;j<widthout;j++) {
+      for (j = 0; j < widthout; j++) {
 	 GLint jj = j * sx;
 
 	 GLfloat *src = tempin + (ii * widthin + jj) * components;
 	 GLfloat *dst = tempout + (i * widthout + j) * components;
 
-	 for (k=0;k<components;k++) {
+	 for (k = 0; k < components; k++) {
 	    *dst++ = *src++;
 	 }
       }
    }
 #else
-   if (sx<1.0 && sy<1.0) {
+   if (sx < 1.0 && sy < 1.0) {
       /* magnify both width and height:  use weighted sample of 4 pixels */
       GLint i0, i1, j0, j1;
       GLfloat alpha, beta;
@@ -305,18 +329,20 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
       GLfloat s1, s2;
       GLfloat *dst;
 
-      for (i=0;i<heightout;i++) {
+      for (i = 0; i < heightout; i++) {
 	 i0 = i * sy;
 	 i1 = i0 + 1;
-	 if (i1 >= heightin) i1 = heightin-1;
+	 if (i1 >= heightin)
+	    i1 = heightin - 1;
 /*	 i1 = (i+1) * sy - EPSILON;*/
-	 alpha = i*sy - i0;
-	 for (j=0;j<widthout;j++) {
+	 alpha = i * sy - i0;
+	 for (j = 0; j < widthout; j++) {
 	    j0 = j * sx;
 	    j1 = j0 + 1;
-	    if (j1 >= widthin) j1 = widthin-1;
+	    if (j1 >= widthin)
+	       j1 = widthin - 1;
 /*	    j1 = (j+1) * sx - EPSILON; */
-	    beta = j*sx - j0;
+	    beta = j * sx - j0;
 
 	    /* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
 	    src00 = tempin + (i0 * widthin + j0) * components;
@@ -326,10 +352,10 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
 
 	    dst = tempout + (i * widthout + j) * components;
 
-	    for (k=0;k<components;k++) {
-	       s1 = *src00++ * (1.0-beta) + *src01++ * beta;
-	       s2 = *src10++ * (1.0-beta) + *src11++ * beta;
-	       *dst++ = s1 * (1.0-alpha) + s2 * alpha;
+	    for (k = 0; k < components; k++) {
+	       s1 = *src00++ * (1.0 - beta) + *src01++ * beta;
+	       s2 = *src10++ * (1.0 - beta) + *src11++ * beta;
+	       *dst++ = s1 * (1.0 - alpha) + s2 * alpha;
 	    }
 	 }
       }
@@ -341,28 +367,30 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
       GLint ii, jj;
       GLfloat sum, *dst;
 
-      for (i=0;i<heightout;i++) {
+      for (i = 0; i < heightout; i++) {
 	 i0 = i * sy;
 	 i1 = i0 + 1;
-	 if (i1 >= heightin) i1 = heightin-1; 
+	 if (i1 >= heightin)
+	    i1 = heightin - 1;
 /*	 i1 = (i+1) * sy - EPSILON; */
-	 for (j=0;j<widthout;j++) {
+	 for (j = 0; j < widthout; j++) {
 	    j0 = j * sx;
 	    j1 = j0 + 1;
-	    if (j1 >= widthin) j1 = widthin-1;
+	    if (j1 >= widthin)
+	       j1 = widthin - 1;
 /*	    j1 = (j+1) * sx - EPSILON; */
 
 	    dst = tempout + (i * widthout + j) * components;
 
 	    /* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */
-	    for (k=0;k<components;k++) {
+	    for (k = 0; k < components; k++) {
 	       sum = 0.0;
-	       for (ii=i0;ii<=i1;ii++) {
-		  for (jj=j0;jj<=j1;jj++) {
+	       for (ii = i0; ii <= i1; ii++) {
+		  for (jj = j0; jj <= j1; jj++) {
 		     sum += *(tempin + (ii * widthin + jj) * components + k);
 		  }
 	       }
-	       sum /= (j1-j0+1) * (i1-i0+1);
+	       sum /= (j1 - j0 + 1) * (i1 - i0 + 1);
 	       *dst++ = sum;
 	    }
 	 }
@@ -375,7 +403,7 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
     * Return output image
     */
 
-   if (packrowlength>0) {
+   if (packrowlength > 0) {
       rowlen = packrowlength;
    }
    else {
@@ -385,110 +413,103 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
       rowstride = components * rowlen;
    }
    else {
-      rowstride = packalignment/sizeout
-	        * CEILING( components * rowlen * sizeout, packalignment );
+      rowstride = packalignment / sizeout
+	 * CEILING(components * rowlen * sizeout, packalignment);
    }
 
    switch (typeout) {
-      case GL_UNSIGNED_BYTE:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLubyte *ubptr = (GLubyte *) dataout
-	                   + i * rowstride
-			   + packskiprows * rowstride
-			   + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *ubptr++ = (GLubyte) tempout[k++];
-	    }
+   case GL_UNSIGNED_BYTE:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLubyte *ubptr = (GLubyte *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *ubptr++ = (GLubyte) tempout[k++];
 	 }
-	 break;
-      case GL_BYTE:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLbyte *bptr = (GLbyte *) dataout
-	                 + i * rowstride
-			 + packskiprows * rowstride
-			 + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *bptr++ = (GLbyte) tempout[k++];
-	    }
+      }
+      break;
+   case GL_BYTE:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLbyte *bptr = (GLbyte *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *bptr++ = (GLbyte) tempout[k++];
 	 }
-	 break;
-      case GL_UNSIGNED_SHORT:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLushort *usptr = (GLushort *) dataout
-	                    + i * rowstride
-			    + packskiprows * rowstride
-			    + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *usptr++ = (GLushort) tempout[k++];
-	    }
+      }
+      break;
+   case GL_UNSIGNED_SHORT:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLushort *usptr = (GLushort *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *usptr++ = (GLushort) tempout[k++];
 	 }
-	 break;
-      case GL_SHORT:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLshort *sptr = (GLshort *) dataout
-	                  + i * rowstride
-			  + packskiprows * rowstride
-			  + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *sptr++ = (GLshort) tempout[k++];
-	    }
+      }
+      break;
+   case GL_SHORT:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLshort *sptr = (GLshort *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *sptr++ = (GLshort) tempout[k++];
 	 }
-	 break;
-      case GL_UNSIGNED_INT:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLuint *uiptr = (GLuint *) dataout
-	                  + i * rowstride
-			  + packskiprows * rowstride
-			  + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *uiptr++ = (GLuint) tempout[k++];
-	    }
+      }
+      break;
+   case GL_UNSIGNED_INT:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLuint *uiptr = (GLuint *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *uiptr++ = (GLuint) tempout[k++];
 	 }
-	 break;
-      case GL_INT:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLint *iptr = (GLint *) dataout
-	                + i * rowstride
-			+ packskiprows * rowstride
-			+ packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *iptr++ = (GLint) tempout[k++];
-	    }
+      }
+      break;
+   case GL_INT:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLint *iptr = (GLint *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *iptr++ = (GLint) tempout[k++];
 	 }
-	 break;
-      case GL_FLOAT:
-	 k = 0;
-	 for (i=0;i<heightout;i++) {
-	    GLfloat *fptr = (GLfloat *) dataout
-	                  + i * rowstride
-			  + packskiprows * rowstride
-			  + packskippixels * components;
-	    for (j=0;j<widthout*components;j++) {
-               dummy(j, k+i);
-	       *fptr++ = tempout[k++];
-	    }
+      }
+      break;
+   case GL_FLOAT:
+      k = 0;
+      for (i = 0; i < heightout; i++) {
+	 GLfloat *fptr = (GLfloat *) dataout
+	    + i * rowstride
+	    + packskiprows * rowstride + packskippixels * components;
+	 for (j = 0; j < widthout * components; j++) {
+	    dummy(j, k + i);
+	    *fptr++ = tempout[k++];
 	 }
-	 break;
-      default:
-	 return GLU_INVALID_ENUM;
+      }
+      break;
+   default:
+      return GLU_INVALID_ENUM;
    }
 
 
    /* free temporary image storage */
-   free( tempin );
-   free( tempout );
+   free(tempin);
+   free(tempout);
 
    return 0;
 }
@@ -498,12 +519,14 @@ GLint GLAPIENTRY gluScaleImage( GLenum format,
 /*
  * Return the largest k such that 2^k <= n.
  */
-static GLint ilog2( GLint n )
+static GLint
+ilog2(GLint n)
 {
    GLint k;
 
-   if (n<=0) return 0;
-   for (k=0; n>>=1; k++) ;
+   if (n <= 0)
+      return 0;
+   for (k = 0; n >>= 1; k++);
    return k;
 }
 
@@ -512,19 +535,19 @@ static GLint ilog2( GLint n )
 /*
  * Find the value nearest to n which is also a power of two.
  */
-static GLint round2( GLint n )
+static GLint
+round2(GLint n)
 {
    GLint m;
 
-   for (m=1; m<n; m*=2)
-     ;
+   for (m = 1; m < n; m *= 2);
 
    /* m>=n */
-   if (m-n <= n-m/2) {
+   if (m - n <= n - m / 2) {
       return m;
    }
    else {
-      return m/2;
+      return m / 2;
    }
 }
 
@@ -533,47 +556,66 @@ static GLint round2( GLint n )
  * Given an pixel format and datatype, return the number of bytes to
  * store one pixel.
  */
-static GLint bytes_per_pixel( GLenum format, GLenum type )
+static GLint
+bytes_per_pixel(GLenum format, GLenum type)
 {
    GLint n, m;
 
    switch (format) {
-      case GL_COLOR_INDEX:
-      case GL_STENCIL_INDEX:
-      case GL_DEPTH_COMPONENT:
-      case GL_RED:
-      case GL_GREEN:
-      case GL_BLUE:
-      case GL_ALPHA:
-      case GL_LUMINANCE:
-	 n = 1;
-	 break;
-      case GL_LUMINANCE_ALPHA:
-	 n = 2;
-	 break;
-      case GL_RGB:
-	 n = 3;
-	 break;
-      case GL_RGBA:
+   case GL_COLOR_INDEX:
+   case GL_STENCIL_INDEX:
+   case GL_DEPTH_COMPONENT:
+   case GL_RED:
+   case GL_GREEN:
+   case GL_BLUE:
+   case GL_ALPHA:
+   case GL_LUMINANCE:
+      n = 1;
+      break;
+   case GL_LUMINANCE_ALPHA:
+      n = 2;
+      break;
+   case GL_RGB:
+      n = 3;
+      break;
+   case GL_RGBA:
+   case GL_BGRA:
 #ifdef GL_EXT_abgr
-      case GL_ABGR_EXT:
+   case GL_ABGR_EXT:
 #endif
-	 n = 4;
-	 break;
-      default:
-	 n = 0;
+      n = 4;
+      break;
+   default:
+      n = 0;
    }
 
    switch (type) {
-      case GL_UNSIGNED_BYTE:	m = sizeof(GLubyte);	break;
-      case GL_BYTE:		m = sizeof(GLbyte);	break;
-      case GL_BITMAP:		m = 1;			break;
-      case GL_UNSIGNED_SHORT:	m = sizeof(GLushort);	break;
-      case GL_SHORT:		m = sizeof(GLshort);	break;
-      case GL_UNSIGNED_INT:	m = sizeof(GLuint);	break;
-      case GL_INT:		m = sizeof(GLint);	break;
-      case GL_FLOAT:		m = sizeof(GLfloat);	break;
-      default:			m = 0;
+   case GL_UNSIGNED_BYTE:
+      m = sizeof(GLubyte);
+      break;
+   case GL_BYTE:
+      m = sizeof(GLbyte);
+      break;
+   case GL_BITMAP:
+      m = 1;
+      break;
+   case GL_UNSIGNED_SHORT:
+      m = sizeof(GLushort);
+      break;
+   case GL_SHORT:
+      m = sizeof(GLshort);
+      break;
+   case GL_UNSIGNED_INT:
+      m = sizeof(GLuint);
+      break;
+   case GL_INT:
+      m = sizeof(GLint);
+      break;
+   case GL_FLOAT:
+      m = sizeof(GLfloat);
+      break;
+   default:
+      m = 0;
    }
 
    return n * m;
@@ -584,9 +626,9 @@ static GLint bytes_per_pixel( GLenum format, GLenum type )
 /*
  * WARNING: This function isn't finished and has never been tested!!!!
  */
-GLint GLAPIENTRY gluBuild1DMipmaps( GLenum target, GLint components,
-                                  GLsizei width, GLenum format,
-                                  GLenum type, const void *data )
+GLint GLAPIENTRY
+gluBuild1DMipmaps(GLenum target, GLint components,
+		  GLsizei width, GLenum format, GLenum type, const void *data)
 {
    GLubyte *texture;
    GLint levels, max_levels;
@@ -596,18 +638,18 @@ GLint GLAPIENTRY gluBuild1DMipmaps( GLenum target, GLint components,
    if (width < 1)
       return GLU_INVALID_VALUE;
 
-   glGetIntegerv( GL_MAX_TEXTURE_SIZE, &max_width );
-   max_levels = ilog2( max_width ) + 1;
+   glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_width);
+   max_levels = ilog2(max_width) + 1;
 
    /* Compute how many mipmap images to make */
-   levels = ilog2( width ) + 1;
-   if (levels>max_levels) {
+   levels = ilog2(width) + 1;
+   if (levels > max_levels) {
       levels = max_levels;
    }
 
-   new_width = 1 << (levels-1);
+   new_width = 1 << (levels - 1);
 
-   texture = (GLubyte *) malloc( new_width * components );
+   texture = (GLubyte *) malloc(new_width * components);
    if (!texture) {
       return GLU_OUT_OF_MEMORY;
    }
@@ -615,50 +657,51 @@ GLint GLAPIENTRY gluBuild1DMipmaps( GLenum target, GLint components,
    if (width != new_width) {
       /* initial rescaling */
       switch (type) {
-	 case GL_UNSIGNED_BYTE:
-	    {
-	       GLubyte *ub_data = (GLubyte *) data;
-	       for (i=0;i<new_width;i++) {
-		  j = i * width / new_width;
-		  for (k=0;k<components;k++) {
-		     texture[i*components+k] = ub_data[j*components+k];
-		  }
+      case GL_UNSIGNED_BYTE:
+	 {
+	    GLubyte *ub_data = (GLubyte *) data;
+	    for (i = 0; i < new_width; i++) {
+	       j = i * width / new_width;
+	       for (k = 0; k < components; k++) {
+		  texture[i * components + k] = ub_data[j * components + k];
 	       }
 	    }
-	    break;
-	 default:
-	    /* Not implemented */
-	    return GLU_ERROR;
+	 }
+	 break;
+      default:
+	 /* Not implemented */
+	 return GLU_ERROR;
       }
    }
 
    /* generate and load mipmap images */
-   for (l=0;l<levels;l++) {
-      glTexImage1D( GL_TEXTURE_1D, l, components, new_width, 0,
-		    format, GL_UNSIGNED_BYTE, texture );
+   for (l = 0; l < levels; l++) {
+      glTexImage1D(GL_TEXTURE_1D, l, components, new_width, 0,
+		   format, GL_UNSIGNED_BYTE, texture);
 
       /* Scale image down to 1/2 size */
       new_width = new_width / 2;
-      for (i=0;i<new_width;i++) {
-	 for (k=0;k<components;k++) {
+      for (i = 0; i < new_width; i++) {
+	 for (k = 0; k < components; k++) {
 	    GLint sample1, sample2;
-	    sample1 = (GLint) texture[i*2*components+k];
-	    sample2 = (GLint) texture[(i*2+1)*components+k];
-	    texture[i*components+k] = (GLubyte) ((sample1 + sample2) / 2);
+	    sample1 = (GLint) texture[i * 2 * components + k];
+	    sample2 = (GLint) texture[(i * 2 + 1) * components + k];
+	    texture[i * components + k] = (GLubyte) ((sample1 + sample2) / 2);
 	 }
       }
    }
 
-   free( texture );
+   free(texture);
 
    return 0;
 }
 
 
 
-GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
-                                  GLsizei width, GLsizei height, GLenum format,
-                                  GLenum type, const void *data )
+GLint GLAPIENTRY
+gluBuild2DMipmaps(GLenum target, GLint components,
+		  GLsizei width, GLsizei height, GLenum format,
+		  GLenum type, const void *data)
 {
    GLint w, h, maxsize;
    void *image, *newimage;
@@ -672,52 +715,52 @@ GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
    if (width < 1 || height < 1)
       return GLU_INVALID_VALUE;
 
-   glGetIntegerv( GL_MAX_TEXTURE_SIZE, &maxsize );
+   glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
 
-   w = round2( width );
-   if (w>maxsize) {
+   w = round2(width);
+   if (w > maxsize) {
       w = maxsize;
    }
-   h = round2( height );
-   if (h>maxsize) {
+   h = round2(height);
+   if (h > maxsize) {
       h = maxsize;
    }
 
-   bpp = bytes_per_pixel( format, type );
-   if (bpp==0) {
+   bpp = bytes_per_pixel(format, type);
+   if (bpp == 0) {
       /* probably a bad format or type enum */
       return GLU_INVALID_ENUM;
    }
 
    /* Get current glPixelStore values */
-   glGetIntegerv( GL_UNPACK_ROW_LENGTH, &unpackrowlength );
-   glGetIntegerv( GL_UNPACK_ALIGNMENT, &unpackalignment );
-   glGetIntegerv( GL_UNPACK_SKIP_ROWS, &unpackskiprows );
-   glGetIntegerv( GL_UNPACK_SKIP_PIXELS, &unpackskippixels );
-   glGetIntegerv( GL_PACK_ROW_LENGTH, &packrowlength );
-   glGetIntegerv( GL_PACK_ALIGNMENT, &packalignment );
-   glGetIntegerv( GL_PACK_SKIP_ROWS, &packskiprows );
-   glGetIntegerv( GL_PACK_SKIP_PIXELS, &packskippixels );
+   glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
+   glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
+   glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
+   glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
+   glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
+   glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
+   glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
+   glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
 
    /* set pixel packing */
-   glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
-   glPixelStorei( GL_PACK_ALIGNMENT, 1 );
-   glPixelStorei( GL_PACK_SKIP_ROWS, 0 );
-   glPixelStorei( GL_PACK_SKIP_PIXELS, 0 );
+   glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+   glPixelStorei(GL_PACK_ALIGNMENT, 1);
+   glPixelStorei(GL_PACK_SKIP_ROWS, 0);
+   glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
 
    done = GL_FALSE;
 
-   if (w!=width || h!=height) {
+   if (w != width || h != height) {
       /* must rescale image to get "top" mipmap texture image */
-      image = malloc( (w+4) * h * bpp );
+      image = malloc((w + 4) * h * bpp);
       if (!image) {
 	 return GLU_OUT_OF_MEMORY;
       }
-      error = gluScaleImage( format, width, height, type, data,
-			     w, h, type, image );
+      error = gluScaleImage(format, width, height, type, data,
+			    w, h, type, image);
       if (error) {
-         retval = error;
-         done = GL_TRUE;
+	 retval = error;
+	 done = GL_TRUE;
       }
    }
    else {
@@ -727,33 +770,34 @@ GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
    level = 0;
    while (!done) {
       if (image != data) {
-         /* set pixel unpacking */
-         glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
-         glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
-         glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
-         glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
+	 /* set pixel unpacking */
+	 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+	 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+	 glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+	 glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
       }
 
-      glTexImage2D( target, level, components, w, h, 0, format, type, image );
+      glTexImage2D(target, level, components, w, h, 0, format, type, image);
 
-      if (w==1 && h==1)  break;
+      if (w == 1 && h == 1)
+	 break;
 
-      neww = (w<2) ? 1 : w/2;
-      newh = (h<2) ? 1 : h/2;
-      newimage = malloc( (neww+4) * newh * bpp );
+      neww = (w < 2) ? 1 : w / 2;
+      newh = (h < 2) ? 1 : h / 2;
+      newimage = malloc((neww + 4) * newh * bpp);
       if (!newimage) {
 	 return GLU_OUT_OF_MEMORY;
       }
 
-      error =  gluScaleImage( format, w, h, type, image,
-			      neww, newh, type, newimage );
+      error = gluScaleImage(format, w, h, type, image,
+			    neww, newh, type, newimage);
       if (error) {
-         retval = error;
-         done = GL_TRUE;
+	 retval = error;
+	 done = GL_TRUE;
       }
 
-      if (image!=data) {
-	 free( image );
+      if (image != data) {
+	 free(image);
       }
       image = newimage;
 
@@ -762,20 +806,19 @@ GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
       level++;
    }
 
-   if (image!=data) {
-      free( image );
+   if (image != data) {
+      free(image);
    }
 
    /* Restore original glPixelStore state */
-   glPixelStorei( GL_UNPACK_ROW_LENGTH, unpackrowlength );
-   glPixelStorei( GL_UNPACK_ALIGNMENT, unpackalignment );
-   glPixelStorei( GL_UNPACK_SKIP_ROWS, unpackskiprows );
-   glPixelStorei( GL_UNPACK_SKIP_PIXELS, unpackskippixels );
-   glPixelStorei( GL_PACK_ROW_LENGTH, packrowlength );
-   glPixelStorei( GL_PACK_ALIGNMENT, packalignment );
-   glPixelStorei( GL_PACK_SKIP_ROWS, packskiprows );
-   glPixelStorei( GL_PACK_SKIP_PIXELS, packskippixels );
+   glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackrowlength);
+   glPixelStorei(GL_UNPACK_ALIGNMENT, unpackalignment);
+   glPixelStorei(GL_UNPACK_SKIP_ROWS, unpackskiprows);
+   glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackskippixels);
+   glPixelStorei(GL_PACK_ROW_LENGTH, packrowlength);
+   glPixelStorei(GL_PACK_ALIGNMENT, packalignment);
+   glPixelStorei(GL_PACK_SKIP_ROWS, packskiprows);
+   glPixelStorei(GL_PACK_SKIP_PIXELS, packskippixels);
 
    return retval;
 }
-