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Diffstat (limited to 'src/glu/mesa/mipmap.c')
-rw-r--r--src/glu/mesa/mipmap.c829
1 files changed, 0 insertions, 829 deletions
diff --git a/src/glu/mesa/mipmap.c b/src/glu/mesa/mipmap.c
deleted file mode 100644
index ad6b6e63a6..0000000000
--- a/src/glu/mesa/mipmap.c
+++ /dev/null
@@ -1,829 +0,0 @@
-
-/*
- * Mesa 3-D graphics library
- * Version: 3.4
- * Copyright (C) 1995-2000 Brian Paul
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-#ifdef PC_HEADER
-#include "all.h"
-#else
-#include <assert.h>
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "gluP.h"
-#endif
-
-
-/*
- * Compute ceiling of integer quotient of A divided by B:
- */
-#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
-
-
-
-#ifdef EPSILON
-#undef EPSILON
-#endif
-#define EPSILON 0.001
-
-
-/* To work around optimizer bug in MSVC4.1 */
-#if defined(__WIN32__) && !defined(OPENSTEP)
-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 components, i, j, k;
- GLfloat *tempin, *tempout;
- GLfloat sx, sy;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
- GLint sizein, sizeout;
- GLint rowstride, rowlen;
-
-
- /* 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:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- 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;
- }
-
- /* 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;
- }
-
- /* 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);
-
- /* Allocate storage for intermediate images */
- tempin = (GLfloat *) malloc(widthin * heightin
- * components * sizeof(GLfloat));
- if (!tempin) {
- return GLU_OUT_OF_MEMORY;
- }
- tempout = (GLfloat *) malloc(widthout * heightout
- * components * sizeof(GLfloat));
- if (!tempout) {
- free(tempin);
- return GLU_OUT_OF_MEMORY;
- }
-
-
- /*
- * Unpack the pixel data and convert to floating point
- */
-
- if (unpackrowlength > 0) {
- rowlen = unpackrowlength;
- }
- else {
- rowlen = widthin;
- }
- if (sizein >= unpackalignment) {
- rowstride = components * rowlen;
- }
- else {
- 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++;
- }
- }
- 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_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_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;
- default:
- {
- free(tempin);
- free(tempout);
- return GLU_INVALID_ENUM;
- }
- }
-
-
- /*
- * Scale the image!
- */
-
- if (widthout > 1)
- sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
- else
- sx = (GLfloat) (widthin - 1);
- if (heightout > 1)
- sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
- else
- sy = (GLfloat) (heightin - 1);
-
-/*#define POINT_SAMPLE*/
-#ifdef POINT_SAMPLE
- for (i = 0; i < heightout; i++) {
- GLint ii = i * sy;
- 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++) {
- *dst++ = *src++;
- }
- }
- }
-#else
- 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;
- GLfloat *src00, *src01, *src10, *src11;
- GLfloat s1, s2;
- GLfloat *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON;*/
- alpha = i * sy - i0;
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 1;
- if (j1 >= widthin)
- j1 = widthin - 1;
-/* j1 = (j+1) * sx - EPSILON; */
- beta = j * sx - j0;
-
- /* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
- src00 = tempin + (i0 * widthin + j0) * components;
- src01 = tempin + (i0 * widthin + j1) * components;
- src10 = tempin + (i1 * widthin + j0) * components;
- src11 = tempin + (i1 * widthin + j1) * components;
-
- 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;
- }
- }
- }
- }
- else {
- /* shrink width and/or height: use an unweighted box filter */
- GLint i0, i1;
- GLint j0, j1;
- GLint ii, jj;
- GLfloat sum, *dst;
-
- for (i = 0; i < heightout; i++) {
- i0 = i * sy;
- i1 = i0 + 1;
- if (i1 >= heightin)
- i1 = heightin - 1;
-/* i1 = (i+1) * sy - EPSILON; */
- for (j = 0; j < widthout; j++) {
- j0 = j * sx;
- j1 = j0 + 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++) {
- sum = 0.0;
- 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);
- *dst++ = sum;
- }
- }
- }
- }
-#endif
-
-
- /*
- * Return output image
- */
-
- if (packrowlength > 0) {
- rowlen = packrowlength;
- }
- else {
- rowlen = widthout;
- }
- if (sizeout >= packalignment) {
- rowstride = components * rowlen;
- }
- else {
- 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++];
- }
- }
- 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_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_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;
- default:
- return GLU_INVALID_ENUM;
- }
-
-
- /* free temporary image storage */
- free(tempin);
- free(tempout);
-
- return 0;
-}
-
-
-
-/*
- * Return the largest k such that 2^k <= n.
- */
-static GLint
-ilog2(GLint n)
-{
- GLint k;
-
- if (n <= 0)
- return 0;
- for (k = 0; n >>= 1; k++);
- return k;
-}
-
-
-
-/*
- * Find the value nearest to n which is also a power of two.
- */
-static GLint
-round2(GLint n)
-{
- GLint m;
-
- for (m = 1; m < n; m *= 2);
-
- /* m>=n */
- if (m - n <= n - m / 2) {
- return m;
- }
- else {
- return m / 2;
- }
-}
-
-
-/*
- * Given an pixel format and datatype, return the number of bytes to
- * store one pixel.
- */
-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:
- case GL_BGR:
- n = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
-#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
-#endif
- 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;
- }
-
- return n * m;
-}
-
-
-
-/*
- * 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)
-{
- GLubyte *texture;
- GLint levels, max_levels;
- GLint new_width, max_width;
- GLint i, j, k, l;
-
- if (width < 1)
- return GLU_INVALID_VALUE;
-
- 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 = max_levels;
- }
-
- new_width = 1 << (levels - 1);
-
- texture = (GLubyte *) malloc(new_width * components);
- if (!texture) {
- return GLU_OUT_OF_MEMORY;
- }
-
- 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];
- }
- }
- }
- break;
- default:
- /* Not implemented */
- free(texture);
- 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);
-
- /* 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++) {
- 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);
- }
- }
- }
-
- free(texture);
-
- return 0;
-}
-
-
-
-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;
- GLint neww, newh, level, bpp;
- int error;
- GLboolean done;
- GLint retval = 0;
- GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
- GLint packrowlength, packalignment, packskiprows, packskippixels;
-
- if (width < 1 || height < 1)
- return GLU_INVALID_VALUE;
-
- glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
-
- w = round2(width);
- if (w > maxsize) {
- w = maxsize;
- }
- h = round2(height);
- if (h > maxsize) {
- h = maxsize;
- }
-
- 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);
-
- /* 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);
-
- done = GL_FALSE;
-
- if (w != width || h != height) {
- /* must rescale image to get "top" mipmap texture image */
- image = malloc((w + 4) * h * bpp);
- if (!image) {
- return GLU_OUT_OF_MEMORY;
- }
- error = gluScaleImage(format, width, height, type, data,
- w, h, type, image);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
- }
- else {
- image = (void *) data;
- }
-
- 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);
- }
-
- glTexImage2D(target, level, components, w, h, 0, format, type, image);
-
- if (w == 1 && h == 1)
- break;
-
- 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);
- if (error) {
- retval = error;
- done = GL_TRUE;
- }
-
- if (image != data) {
- free(image);
- }
- image = newimage;
-
- w = neww;
- h = newh;
- level++;
- }
-
- 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);
-
- return retval;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-19 19:13:27 +0000