1108 lines
27 KiB
C
1108 lines
27 KiB
C
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/*
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** Copyright 1992, Silicon Graphics, Inc.
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** All Rights Reserved.
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**
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** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
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** the contents of this file may not be disclosed to third parties, copied or
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** duplicated in any form, in whole or in part, without the prior written
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** permission of Silicon Graphics, Inc.
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**
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** RESTRICTED RIGHTS LEGEND:
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** Use, duplication or disclosure by the Government is subject to restrictions
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** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
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** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
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** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
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** rights reserved under the Copyright Laws of the United States.
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**
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** $Revision: 1.4 $
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** $Date: 1996/03/29 01:55:31 $
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*/
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#ifdef NT
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#include <glos.h>
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#endif
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#include <assert.h>
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#include "gluint.h"
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#include <GL/glu.h>
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#include <stdio.h>
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#ifdef NT
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#include "winmem.h"
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#else
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#include <stdlib.h>
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#endif
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#include <string.h>
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#include <math.h>
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typedef union {
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unsigned char ub[4];
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unsigned short us[2];
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unsigned long ui;
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char b[4];
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short s[2];
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long i;
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float f;
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} Type_Widget;
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/* Pixel storage modes */
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typedef struct {
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GLint pack_alignment;
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GLint pack_row_length;
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GLint pack_skip_rows;
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GLint pack_skip_pixels;
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GLint pack_lsb_first;
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GLint pack_swap_bytes;
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GLint unpack_alignment;
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GLint unpack_row_length;
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GLint unpack_skip_rows;
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GLint unpack_skip_pixels;
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GLint unpack_lsb_first;
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GLint unpack_swap_bytes;
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} PixelStorageModes;
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/*
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* internal function declarations
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*/
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static GLfloat bytes_per_element(GLenum type);
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static GLint elements_per_group(GLenum format);
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#ifdef NT
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static GLboolean is_index(GLenum format);
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#else
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static GLint is_index(GLenum format);
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#endif
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static GLint image_size(GLint width, GLint height, GLenum format, GLenum type);
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static void fill_image(const PixelStorageModes *,
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GLint width, GLint height, GLenum format,
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GLenum type, GLboolean index_format,
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const void *userdata, GLushort *newimage);
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static void empty_image(const PixelStorageModes *,
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GLint width, GLint height, GLenum format,
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GLenum type, GLboolean index_format,
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const GLushort *oldimage, void *userdata);
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static void scale_internal(GLint components, GLint widthin, GLint heightin,
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const GLushort *datain,
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GLint widthout, GLint heightout,
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GLushort *dataout);
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static GLint retrieveStoreModes(PixelStorageModes *psm)
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{
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glGetError();
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glGetIntegerv(GL_UNPACK_ALIGNMENT, &psm->unpack_alignment);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_UNPACK_ROW_LENGTH, &psm->unpack_row_length);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_UNPACK_SKIP_ROWS, &psm->unpack_skip_rows);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &psm->unpack_skip_pixels);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_UNPACK_LSB_FIRST, &psm->unpack_lsb_first);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_UNPACK_SWAP_BYTES, &psm->unpack_swap_bytes);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_ALIGNMENT, &psm->pack_alignment);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_ROW_LENGTH, &psm->pack_row_length);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_SKIP_ROWS, &psm->pack_skip_rows);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_SKIP_PIXELS, &psm->pack_skip_pixels);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_LSB_FIRST, &psm->pack_lsb_first);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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glGetIntegerv(GL_PACK_SWAP_BYTES, &psm->pack_swap_bytes);
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if (glGetError() != GL_NO_ERROR)
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{
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return 1;
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}
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return 0;
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}
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static int computeLog(GLuint value)
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{
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int i;
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i = 0;
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/* Error! */
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if (value == 0) return -1;
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for (;;) {
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if (value & 1) {
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/* Error ! */
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if (value != 1) return -1;
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return i;
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}
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value = value >> 1;
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i++;
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}
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}
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/*
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** Compute the nearest power of 2 number. This algorithm is a little
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** strange, but it works quite well.
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*/
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static int nearestPower(GLuint value)
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{
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int i;
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i = 1;
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/* Error! */
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if (value == 0) return -1;
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for (;;) {
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if (value == 1) {
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return i;
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} else if (value == 3) {
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return i*4;
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}
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value = value >> 1;
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i *= 2;
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}
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}
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static void halveImage(GLint components, GLuint width, GLuint height,
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const GLushort *datain, GLushort *dataout)
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{
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int i, j, k;
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int newwidth, newheight;
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int delta;
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GLushort *s;
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const GLushort *t;
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newwidth = width / 2;
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newheight = height / 2;
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delta = width * components;
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s = dataout;
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t = datain;
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/* Piece o' cake! */
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for (i = 0; i < newheight; i++) {
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for (j = 0; j < newwidth; j++) {
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for (k = 0; k < components; k++) {
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s[0] = (t[0] + t[components] + t[delta] +
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t[delta+components] + 2) / 4;
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s++; t++;
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}
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t += components;
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}
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t += delta;
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}
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}
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static void scale_internal(GLint components, GLint widthin, GLint heightin,
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const GLushort *datain,
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GLint widthout, GLint heightout,
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GLushort *dataout)
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{
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float x, lowx, highx, convx, halfconvx;
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float y, lowy, highy, convy, halfconvy;
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float xpercent,ypercent;
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float percent;
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/* Max components in a format is 4, so... */
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float totals[4];
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float area;
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int i,j,k,yint,xint,xindex,yindex;
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int temp;
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if (widthin == widthout*2 && heightin == heightout*2) {
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halveImage(components, widthin, heightin, datain, dataout);
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return;
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}
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convy = (float) heightin/heightout;
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convx = (float) widthin/widthout;
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halfconvx = convx/2;
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halfconvy = convy/2;
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for (i = 0; i < heightout; i++) {
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y = convy * (i+0.5);
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if (heightin > heightout) {
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highy = y + halfconvy;
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lowy = y - halfconvy;
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} else {
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highy = y + 0.5;
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lowy = y - 0.5;
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}
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for (j = 0; j < widthout; j++) {
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x = convx * (j+0.5);
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if (widthin > widthout) {
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highx = x + halfconvx;
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lowx = x - halfconvx;
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} else {
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highx = x + 0.5;
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lowx = x - 0.5;
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}
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/*
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** Ok, now apply box filter to box that goes from (lowx, lowy)
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** to (highx, highy) on input data into this pixel on output
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** data.
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*/
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totals[0] = totals[1] = totals[2] = totals[3] = 0.0;
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area = 0.0;
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y = lowy;
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yint = floor(y);
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while (y < highy) {
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yindex = (yint + heightin) % heightin;
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if (highy < yint+1) {
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ypercent = highy - y;
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} else {
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ypercent = yint+1 - y;
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}
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x = lowx;
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xint = floor(x);
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while (x < highx) {
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xindex = (xint + widthin) % widthin;
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if (highx < xint+1) {
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xpercent = highx - x;
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} else {
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xpercent = xint+1 - x;
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}
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percent = xpercent * ypercent;
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area += percent;
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temp = (xindex + (yindex * widthin)) * components;
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for (k = 0; k < components; k++) {
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totals[k] += datain[temp + k] * percent;
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}
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xint++;
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x = xint;
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}
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yint++;
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y = yint;
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}
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temp = (j + (i * widthout)) * components;
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for (k = 0; k < components; k++) {
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dataout[temp + k] = totals[k]/area;
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}
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}
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}
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}
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static GLboolean legalFormat(GLenum format)
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{
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switch(format) {
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case GL_COLOR_INDEX:
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case GL_STENCIL_INDEX:
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case GL_DEPTH_COMPONENT:
|
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case GL_RED:
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case GL_GREEN:
|
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case GL_BLUE:
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case GL_ALPHA:
|
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case GL_RGB:
|
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|
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case GL_RGBA:
|
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|
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#ifdef GL_EXT_bgra
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case GL_BGR_EXT:
|
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case GL_BGRA_EXT:
|
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|
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#endif
|
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case GL_LUMINANCE:
|
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case GL_LUMINANCE_ALPHA:
|
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return GL_TRUE;
|
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|
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default:
|
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return GL_FALSE;
|
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|
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}
|
||
|
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}
|
||
|
|
|
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static GLboolean legalType(GLenum type)
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|
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{
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|
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switch(type) {
|
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|
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case GL_BITMAP:
|
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|
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case GL_BYTE:
|
||
|
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case GL_UNSIGNED_BYTE:
|
||
|
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case GL_SHORT:
|
||
|
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case GL_UNSIGNED_SHORT:
|
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|
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case GL_INT:
|
||
|
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case GL_UNSIGNED_INT:
|
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|
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case GL_FLOAT:
|
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return GL_TRUE;
|
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default:
|
||
|
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return GL_FALSE;
|
||
|
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}
|
||
|
|
}
|
||
|
|
|
||
|
|
GLint gluScaleImage(GLenum format, GLint widthin, GLint heightin,
|
||
|
|
GLenum typein, const void *datain,
|
||
|
|
GLint widthout, GLint heightout, GLenum typeout,
|
||
|
|
void *dataout)
|
||
|
|
{
|
||
|
|
int components;
|
||
|
|
GLushort *beforeImage;
|
||
|
|
GLushort *afterImage;
|
||
|
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PixelStorageModes psm;
|
||
|
|
|
||
|
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if (widthin == 0 || heightin == 0 || widthout == 0 || heightout == 0) {
|
||
|
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return 0;
|
||
|
|
}
|
||
|
|
if (widthin < 0 || heightin < 0 || widthout < 0 || heightout < 0) {
|
||
|
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return GLU_INVALID_VALUE;
|
||
|
|
}
|
||
|
|
if (!legalFormat(format) || !legalType(typein) || !legalType(typeout)) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (retrieveStoreModes(&psm)) {
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
beforeImage =
|
||
|
|
malloc(image_size(widthin, heightin, format, GL_UNSIGNED_SHORT));
|
||
|
|
afterImage =
|
||
|
|
malloc(image_size(widthout, heightout, format, GL_UNSIGNED_SHORT));
|
||
|
|
if (beforeImage == NULL || afterImage == NULL) {
|
||
|
|
return GLU_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
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|
||
|
|
fill_image(&psm,widthin, heightin, format, typein, is_index(format),
|
||
|
|
datain, beforeImage);
|
||
|
|
|
||
|
|
components = elements_per_group(format);
|
||
|
|
scale_internal(components, widthin, heightin, beforeImage,
|
||
|
|
widthout, heightout, afterImage);
|
||
|
|
|
||
|
|
empty_image(&psm,widthout, heightout, format, typeout,
|
||
|
|
is_index(format), afterImage, dataout);
|
||
|
|
free((GLbyte *) beforeImage);
|
||
|
|
free((GLbyte *) afterImage);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLint gluBuild1DMipmaps(GLenum target, GLint components, GLint width,
|
||
|
|
GLenum format, GLenum type, const void *data)
|
||
|
|
{
|
||
|
|
GLint newwidth;
|
||
|
|
GLint level, levels;
|
||
|
|
GLushort *newImage;
|
||
|
|
GLint newImage_width;
|
||
|
|
GLushort *otherImage;
|
||
|
|
GLushort *imageTemp;
|
||
|
|
GLint memreq;
|
||
|
|
GLint maxsize;
|
||
|
|
GLint cmpts;
|
||
|
|
PixelStorageModes psm;
|
||
|
|
GLboolean error = GL_FALSE;
|
||
|
|
|
||
|
|
if (width < 1) {
|
||
|
|
return GLU_INVALID_VALUE;
|
||
|
|
}
|
||
|
|
if (!legalFormat(format) || !legalType(type)) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
if (format == GL_STENCIL_INDEX) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
if (format == GL_DEPTH_COMPONENT) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (retrieveStoreModes(&psm)) {
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
|
||
|
|
if (glGetError() != GL_NO_ERROR)
|
||
|
|
{
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
newwidth = nearestPower(width);
|
||
|
|
if (newwidth > maxsize) newwidth = maxsize;
|
||
|
|
levels = computeLog(newwidth);
|
||
|
|
|
||
|
|
otherImage = NULL;
|
||
|
|
newImage = (GLushort *)
|
||
|
|
malloc(image_size(width, 1, format, GL_UNSIGNED_SHORT));
|
||
|
|
newImage_width = width;
|
||
|
|
if (newImage == NULL) {
|
||
|
|
return GLU_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
fill_image(&psm,width, 1, format, type, is_index(format),
|
||
|
|
data, newImage);
|
||
|
|
cmpts = elements_per_group(format);
|
||
|
|
|
||
|
|
glGetError();
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild1DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild1DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild1DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild1DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
** If swap_bytes was set, swapping occurred in fill_image.
|
||
|
|
*/
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild1DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (level = 0; level <= levels; level++) {
|
||
|
|
if (newImage_width == newwidth) {
|
||
|
|
/* Use newImage for this level */
|
||
|
|
glTexImage1D(target, level, components, newImage_width,
|
||
|
|
0, format, GL_UNSIGNED_SHORT, (void *) newImage);
|
||
|
|
} else {
|
||
|
|
if (otherImage == NULL) {
|
||
|
|
memreq = image_size(newwidth, 1, format, GL_UNSIGNED_SHORT);
|
||
|
|
otherImage = (GLushort *) malloc(memreq);
|
||
|
|
if (otherImage == NULL) {
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS,psm.unpack_skip_pixels);
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
|
||
|
|
return GLU_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
scale_internal(cmpts, newImage_width, 1, newImage,
|
||
|
|
newwidth, 1, otherImage);
|
||
|
|
/* Swap newImage and otherImage */
|
||
|
|
imageTemp = otherImage;
|
||
|
|
otherImage = newImage;
|
||
|
|
newImage = imageTemp;
|
||
|
|
|
||
|
|
newImage_width = newwidth;
|
||
|
|
glTexImage1D(target, level, components, newImage_width,
|
||
|
|
0, format, GL_UNSIGNED_SHORT, (void *) newImage);
|
||
|
|
}
|
||
|
|
if (newwidth > 1) newwidth /= 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
gluBuild1DMipmaps_cleanup:
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
|
||
|
|
|
||
|
|
free((GLbyte *) newImage);
|
||
|
|
if (otherImage) {
|
||
|
|
free((GLbyte *) otherImage);
|
||
|
|
}
|
||
|
|
if (error == GL_TRUE)
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
GLint gluBuild2DMipmaps(GLenum target, GLint components, GLint width,
|
||
|
|
GLint height, GLenum format,
|
||
|
|
GLenum type, const void *data)
|
||
|
|
{
|
||
|
|
GLint newwidth, newheight;
|
||
|
|
GLint level, levels;
|
||
|
|
GLushort *newImage;
|
||
|
|
GLint newImage_width;
|
||
|
|
GLint newImage_height;
|
||
|
|
GLushort *otherImage;
|
||
|
|
GLushort *imageTemp;
|
||
|
|
GLint memreq;
|
||
|
|
GLint maxsize;
|
||
|
|
GLint cmpts;
|
||
|
|
GLboolean error = GL_FALSE;
|
||
|
|
|
||
|
|
PixelStorageModes psm;
|
||
|
|
|
||
|
|
if (width < 1 || height < 1) {
|
||
|
|
return GLU_INVALID_VALUE;
|
||
|
|
}
|
||
|
|
if (!legalFormat(format) || !legalType(type)) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
if (format == GL_STENCIL_INDEX) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
if (format == GL_DEPTH_COMPONENT) {
|
||
|
|
return GLU_INVALID_ENUM;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (retrieveStoreModes(&psm)) {
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
|
||
|
|
if (glGetError() != GL_NO_ERROR)
|
||
|
|
{
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
newwidth = nearestPower(width);
|
||
|
|
if (newwidth > maxsize) newwidth = maxsize;
|
||
|
|
newheight = nearestPower(height);
|
||
|
|
if (newheight > maxsize) newheight = maxsize;
|
||
|
|
levels = computeLog(newwidth);
|
||
|
|
level = computeLog(newheight);
|
||
|
|
if (level > levels) levels=level;
|
||
|
|
|
||
|
|
otherImage = NULL;
|
||
|
|
newImage = (GLushort *)
|
||
|
|
malloc(image_size(width, height, format, GL_UNSIGNED_SHORT));
|
||
|
|
newImage_width = width;
|
||
|
|
newImage_height = height;
|
||
|
|
if (newImage == NULL) {
|
||
|
|
return GLU_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
fill_image(&psm,width, height, format, type, is_index(format),
|
||
|
|
data, newImage);
|
||
|
|
cmpts = elements_per_group(format);
|
||
|
|
|
||
|
|
glGetError();
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 2);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild2DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild2DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild2DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild2DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
** If swap_bytes was set, swapping occurred in fill_image.
|
||
|
|
*/
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, GL_FALSE);
|
||
|
|
if (glGetError() != GL_NO_ERROR) {
|
||
|
|
error = GL_TRUE;
|
||
|
|
goto gluBuild2DMipmaps_cleanup;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (level = 0; level <= levels; level++) {
|
||
|
|
if (newImage_width == newwidth && newImage_height == newheight) {
|
||
|
|
/* Use newImage for this level */
|
||
|
|
glTexImage2D(target, level, components, newImage_width,
|
||
|
|
newImage_height, 0, format, GL_UNSIGNED_SHORT,
|
||
|
|
(void *) newImage);
|
||
|
|
} else {
|
||
|
|
if (otherImage == NULL) {
|
||
|
|
memreq =
|
||
|
|
image_size(newwidth, newheight, format, GL_UNSIGNED_SHORT);
|
||
|
|
otherImage = (GLushort *) malloc(memreq);
|
||
|
|
if (otherImage == NULL) {
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
|
||
|
|
return GLU_OUT_OF_MEMORY;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
scale_internal(cmpts, newImage_width, newImage_height, newImage,
|
||
|
|
newwidth, newheight, otherImage);
|
||
|
|
/* Swap newImage and otherImage */
|
||
|
|
imageTemp = otherImage;
|
||
|
|
otherImage = newImage;
|
||
|
|
newImage = imageTemp;
|
||
|
|
|
||
|
|
newImage_width = newwidth;
|
||
|
|
newImage_height = newheight;
|
||
|
|
glTexImage2D(target, level, components, newImage_width,
|
||
|
|
newImage_height, 0, format, GL_UNSIGNED_SHORT,
|
||
|
|
(void *) newImage);
|
||
|
|
}
|
||
|
|
if (newwidth > 1) newwidth /= 2;
|
||
|
|
if (newheight > 1) newheight /= 2;
|
||
|
|
}
|
||
|
|
gluBuild2DMipmaps_cleanup:
|
||
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, psm.unpack_alignment);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_ROWS, psm.unpack_skip_rows);
|
||
|
|
glPixelStorei(GL_UNPACK_SKIP_PIXELS, psm.unpack_skip_pixels);
|
||
|
|
glPixelStorei(GL_UNPACK_ROW_LENGTH, psm.unpack_row_length);
|
||
|
|
glPixelStorei(GL_UNPACK_SWAP_BYTES, psm.unpack_swap_bytes);
|
||
|
|
|
||
|
|
free((GLbyte *) newImage);
|
||
|
|
if (otherImage) {
|
||
|
|
free((GLbyte *) otherImage);
|
||
|
|
}
|
||
|
|
if (error == GL_TRUE)
|
||
|
|
return GL_OUT_OF_MEMORY;
|
||
|
|
else
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Utility Routines
|
||
|
|
*/
|
||
|
|
static GLint elements_per_group(GLenum format)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Return the number of elements per group of a specified format
|
||
|
|
*/
|
||
|
|
switch(format) {
|
||
|
|
case GL_RGB:
|
||
|
|
#ifdef GL_EXT_bgra
|
||
|
|
case GL_BGR_EXT:
|
||
|
|
#endif
|
||
|
|
return 3;
|
||
|
|
case GL_LUMINANCE_ALPHA:
|
||
|
|
return 2;
|
||
|
|
case GL_RGBA:
|
||
|
|
#ifdef GL_EXT_bgra
|
||
|
|
case GL_BGRA_EXT:
|
||
|
|
#endif
|
||
|
|
return 4;
|
||
|
|
default:
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static GLfloat bytes_per_element(GLenum type)
|
||
|
|
{
|
||
|
|
/*
|
||
|
|
* Return the number of bytes per element, based on the element type
|
||
|
|
*/
|
||
|
|
switch(type) {
|
||
|
|
case GL_BITMAP:
|
||
|
|
return 1.0 / 8.0;
|
||
|
|
case GL_UNSIGNED_SHORT:
|
||
|
|
case GL_SHORT:
|
||
|
|
return 2;
|
||
|
|
case GL_UNSIGNED_BYTE:
|
||
|
|
case GL_BYTE:
|
||
|
|
return 1;
|
||
|
|
case GL_INT:
|
||
|
|
case GL_UNSIGNED_INT:
|
||
|
|
case GL_FLOAT:
|
||
|
|
default:
|
||
|
|
return 4;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#ifdef NT
|
||
|
|
static GLboolean is_index(GLenum format)
|
||
|
|
#else
|
||
|
|
static GLint is_index(GLenum format)
|
||
|
|
#endif
|
||
|
|
{
|
||
|
|
return format == GL_COLOR_INDEX || format == GL_STENCIL_INDEX;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Compute memory required for internal packed array of data of given type
|
||
|
|
** and format.
|
||
|
|
*/
|
||
|
|
static GLint image_size(GLint width, GLint height, GLenum format, GLenum type)
|
||
|
|
{
|
||
|
|
int bytes_per_row;
|
||
|
|
int components;
|
||
|
|
|
||
|
|
assert(width > 0);
|
||
|
|
assert(height > 0);
|
||
|
|
components = elements_per_group(format);
|
||
|
|
if (type == GL_BITMAP) {
|
||
|
|
bytes_per_row = (width + 7) / 8;
|
||
|
|
} else {
|
||
|
|
bytes_per_row = bytes_per_element(type) * width;
|
||
|
|
}
|
||
|
|
return bytes_per_row * height * components;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Extract array from user's data applying all pixel store modes.
|
||
|
|
** The internal format used is an array of unsigned shorts.
|
||
|
|
*/
|
||
|
|
static void fill_image(const PixelStorageModes *psm,
|
||
|
|
GLint width, GLint height, GLenum format,
|
||
|
|
GLenum type, GLboolean index_format,
|
||
|
|
const void *userdata, GLushort *newimage)
|
||
|
|
{
|
||
|
|
GLint components;
|
||
|
|
GLint element_size;
|
||
|
|
GLint rowsize;
|
||
|
|
GLint padding;
|
||
|
|
GLint groups_per_line;
|
||
|
|
GLint group_size;
|
||
|
|
GLint elements_per_line;
|
||
|
|
const GLubyte *start;
|
||
|
|
const GLubyte *iter;
|
||
|
|
GLushort *iter2;
|
||
|
|
GLint i, j, k;
|
||
|
|
GLint myswap_bytes;
|
||
|
|
|
||
|
|
myswap_bytes = psm->unpack_swap_bytes;
|
||
|
|
components = elements_per_group(format);
|
||
|
|
if (psm->unpack_row_length > 0) {
|
||
|
|
groups_per_line = psm->unpack_row_length;
|
||
|
|
} else {
|
||
|
|
groups_per_line = width;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* All formats except GL_BITMAP fall out trivially */
|
||
|
|
if (type == GL_BITMAP) {
|
||
|
|
GLint bit_offset;
|
||
|
|
GLint current_bit;
|
||
|
|
|
||
|
|
rowsize = (groups_per_line * components + 7) / 8;
|
||
|
|
padding = (rowsize % psm->unpack_alignment);
|
||
|
|
if (padding) {
|
||
|
|
rowsize += psm->unpack_alignment - padding;
|
||
|
|
}
|
||
|
|
start = (GLubyte *) userdata + psm->unpack_skip_rows * rowsize +
|
||
|
|
(psm->unpack_skip_pixels * components / 8);
|
||
|
|
elements_per_line = width * components;
|
||
|
|
iter2 = newimage;
|
||
|
|
for (i = 0; i < height; i++) {
|
||
|
|
iter = start;
|
||
|
|
bit_offset = (psm->unpack_skip_pixels * components) % 8;
|
||
|
|
for (j = 0; j < elements_per_line; j++) {
|
||
|
|
/* Retrieve bit */
|
||
|
|
if (psm->unpack_lsb_first) {
|
||
|
|
current_bit = iter[0] & (1 << bit_offset);
|
||
|
|
} else {
|
||
|
|
current_bit = iter[0] & (1 << (7 - bit_offset));
|
||
|
|
}
|
||
|
|
if (current_bit) {
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = 1;
|
||
|
|
} else {
|
||
|
|
*iter2 = 65535;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
*iter2 = 0;
|
||
|
|
}
|
||
|
|
bit_offset++;
|
||
|
|
if (bit_offset == 8) {
|
||
|
|
bit_offset = 0;
|
||
|
|
iter++;
|
||
|
|
}
|
||
|
|
iter2++;
|
||
|
|
}
|
||
|
|
start += rowsize;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
element_size = bytes_per_element(type);
|
||
|
|
group_size = element_size * components;
|
||
|
|
if (element_size == 1) myswap_bytes = 0;
|
||
|
|
|
||
|
|
rowsize = groups_per_line * group_size;
|
||
|
|
padding = (rowsize % psm->unpack_alignment);
|
||
|
|
if (padding) {
|
||
|
|
rowsize += psm->unpack_alignment - padding;
|
||
|
|
}
|
||
|
|
start = (GLubyte *) userdata + psm->unpack_skip_rows * rowsize +
|
||
|
|
psm->unpack_skip_pixels * group_size;
|
||
|
|
elements_per_line = width * components;
|
||
|
|
|
||
|
|
iter2 = newimage;
|
||
|
|
for (i = 0; i < height; i++) {
|
||
|
|
iter = start;
|
||
|
|
for (j = 0; j < elements_per_line; j++) {
|
||
|
|
Type_Widget widget;
|
||
|
|
|
||
|
|
switch(type) {
|
||
|
|
case GL_UNSIGNED_BYTE:
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = *iter;
|
||
|
|
} else {
|
||
|
|
*iter2 = (*iter) * 257;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_BYTE:
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = *((GLbyte *) iter);
|
||
|
|
} else {
|
||
|
|
/* rough approx */
|
||
|
|
*iter2 = (*((GLbyte *) iter)) * 516;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_UNSIGNED_SHORT:
|
||
|
|
case GL_SHORT:
|
||
|
|
if (myswap_bytes) {
|
||
|
|
widget.ub[0] = iter[1];
|
||
|
|
widget.ub[1] = iter[0];
|
||
|
|
} else {
|
||
|
|
widget.ub[0] = iter[0];
|
||
|
|
widget.ub[1] = iter[1];
|
||
|
|
}
|
||
|
|
if (type == GL_SHORT) {
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = widget.s[0];
|
||
|
|
} else {
|
||
|
|
/* rough approx */
|
||
|
|
*iter2 = widget.s[0]*2;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
*iter2 = widget.us[0];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_INT:
|
||
|
|
case GL_UNSIGNED_INT:
|
||
|
|
case GL_FLOAT:
|
||
|
|
if (myswap_bytes) {
|
||
|
|
widget.ub[0] = iter[3];
|
||
|
|
widget.ub[1] = iter[2];
|
||
|
|
widget.ub[2] = iter[1];
|
||
|
|
widget.ub[3] = iter[0];
|
||
|
|
} else {
|
||
|
|
widget.ub[0] = iter[0];
|
||
|
|
widget.ub[1] = iter[1];
|
||
|
|
widget.ub[2] = iter[2];
|
||
|
|
widget.ub[3] = iter[3];
|
||
|
|
}
|
||
|
|
if (type == GL_FLOAT) {
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = widget.f;
|
||
|
|
} else {
|
||
|
|
*iter2 = 65535 * widget.f;
|
||
|
|
}
|
||
|
|
} else if (type == GL_UNSIGNED_INT) {
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = (GLushort)widget.ui;
|
||
|
|
} else {
|
||
|
|
*iter2 = widget.ui >> 16;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (index_format) {
|
||
|
|
*iter2 = (GLushort)widget.i;
|
||
|
|
} else {
|
||
|
|
*iter2 = widget.i >> 15;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
iter += element_size;
|
||
|
|
iter2++;
|
||
|
|
}
|
||
|
|
start += rowsize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
** Insert array into user's data applying all pixel store modes.
|
||
|
|
** The internal format is an array of unsigned shorts.
|
||
|
|
** empty_image() because it is the opposite of fill_image().
|
||
|
|
*/
|
||
|
|
static void empty_image(const PixelStorageModes *psm,
|
||
|
|
GLint width, GLint height, GLenum format,
|
||
|
|
GLenum type, GLboolean index_format,
|
||
|
|
const GLushort *oldimage, void *userdata)
|
||
|
|
{
|
||
|
|
GLint components;
|
||
|
|
GLint element_size;
|
||
|
|
GLint rowsize;
|
||
|
|
GLint padding;
|
||
|
|
GLint groups_per_line;
|
||
|
|
GLint group_size;
|
||
|
|
GLint elements_per_line;
|
||
|
|
GLubyte *start;
|
||
|
|
GLubyte *iter;
|
||
|
|
const GLushort *iter2;
|
||
|
|
GLint i, j, k;
|
||
|
|
GLint myswap_bytes;
|
||
|
|
|
||
|
|
myswap_bytes = psm->pack_swap_bytes;
|
||
|
|
components = elements_per_group(format);
|
||
|
|
if (psm->pack_row_length > 0) {
|
||
|
|
groups_per_line = psm->pack_row_length;
|
||
|
|
} else {
|
||
|
|
groups_per_line = width;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* All formats except GL_BITMAP fall out trivially */
|
||
|
|
if (type == GL_BITMAP) {
|
||
|
|
GLint bit_offset;
|
||
|
|
GLint current_bit;
|
||
|
|
|
||
|
|
rowsize = (groups_per_line * components + 7) / 8;
|
||
|
|
padding = (rowsize % psm->pack_alignment);
|
||
|
|
if (padding) {
|
||
|
|
rowsize += psm->pack_alignment - padding;
|
||
|
|
}
|
||
|
|
start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize +
|
||
|
|
(psm->pack_skip_pixels * components / 8);
|
||
|
|
elements_per_line = width * components;
|
||
|
|
iter2 = oldimage;
|
||
|
|
for (i = 0; i < height; i++) {
|
||
|
|
iter = start;
|
||
|
|
bit_offset = (psm->pack_skip_pixels * components) % 8;
|
||
|
|
for (j = 0; j < elements_per_line; j++) {
|
||
|
|
if (index_format) {
|
||
|
|
current_bit = iter2[0] & 1;
|
||
|
|
} else {
|
||
|
|
if (iter2[0] > 32767) {
|
||
|
|
current_bit = 1;
|
||
|
|
} else {
|
||
|
|
current_bit = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (current_bit) {
|
||
|
|
if (psm->pack_lsb_first) {
|
||
|
|
*iter |= (1 << bit_offset);
|
||
|
|
} else {
|
||
|
|
*iter |= (1 << (7 - bit_offset));
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (psm->pack_lsb_first) {
|
||
|
|
*iter &= ~(1 << bit_offset);
|
||
|
|
} else {
|
||
|
|
*iter &= ~(1 << (7 - bit_offset));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
bit_offset++;
|
||
|
|
if (bit_offset == 8) {
|
||
|
|
bit_offset = 0;
|
||
|
|
iter++;
|
||
|
|
}
|
||
|
|
iter2++;
|
||
|
|
}
|
||
|
|
start += rowsize;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
element_size = bytes_per_element(type);
|
||
|
|
group_size = element_size * components;
|
||
|
|
if (element_size == 1) myswap_bytes = 0;
|
||
|
|
|
||
|
|
rowsize = groups_per_line * group_size;
|
||
|
|
padding = (rowsize % psm->pack_alignment);
|
||
|
|
if (padding) {
|
||
|
|
rowsize += psm->pack_alignment - padding;
|
||
|
|
}
|
||
|
|
start = (GLubyte *) userdata + psm->pack_skip_rows * rowsize +
|
||
|
|
psm->pack_skip_pixels * group_size;
|
||
|
|
elements_per_line = width * components;
|
||
|
|
|
||
|
|
iter2 = oldimage;
|
||
|
|
for (i = 0; i < height; i++) {
|
||
|
|
iter = start;
|
||
|
|
for (j = 0; j < elements_per_line; j++) {
|
||
|
|
Type_Widget widget;
|
||
|
|
|
||
|
|
switch(type) {
|
||
|
|
case GL_UNSIGNED_BYTE:
|
||
|
|
if (index_format) {
|
||
|
|
*iter = (GLubyte)*iter2;
|
||
|
|
} else {
|
||
|
|
*iter = *iter2 >> 8;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_BYTE:
|
||
|
|
if (index_format) {
|
||
|
|
*((GLbyte *) iter) = (GLbyte)*iter2;
|
||
|
|
} else {
|
||
|
|
*((GLbyte *) iter) = *iter2 >> 9;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_UNSIGNED_SHORT:
|
||
|
|
case GL_SHORT:
|
||
|
|
if (type == GL_SHORT) {
|
||
|
|
if (index_format) {
|
||
|
|
widget.s[0] = *iter2;
|
||
|
|
} else {
|
||
|
|
widget.s[0] = *iter2 >> 1;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
widget.us[0] = *iter2;
|
||
|
|
}
|
||
|
|
if (myswap_bytes) {
|
||
|
|
iter[0] = widget.ub[1];
|
||
|
|
iter[1] = widget.ub[0];
|
||
|
|
} else {
|
||
|
|
iter[0] = widget.ub[0];
|
||
|
|
iter[1] = widget.ub[1];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case GL_INT:
|
||
|
|
case GL_UNSIGNED_INT:
|
||
|
|
case GL_FLOAT:
|
||
|
|
if (type == GL_FLOAT) {
|
||
|
|
if (index_format) {
|
||
|
|
widget.f = *iter2;
|
||
|
|
} else {
|
||
|
|
widget.f = *iter2 / (float) 65535.0;
|
||
|
|
}
|
||
|
|
} else if (type == GL_UNSIGNED_INT) {
|
||
|
|
if (index_format) {
|
||
|
|
widget.ui = *iter2;
|
||
|
|
} else {
|
||
|
|
widget.ui = (unsigned int) *iter2 * 65537;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (index_format) {
|
||
|
|
widget.i = *iter2;
|
||
|
|
} else {
|
||
|
|
widget.i = ((unsigned int) *iter2 * 65537)/2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (myswap_bytes) {
|
||
|
|
iter[3] = widget.ub[0];
|
||
|
|
iter[2] = widget.ub[1];
|
||
|
|
iter[1] = widget.ub[2];
|
||
|
|
iter[0] = widget.ub[3];
|
||
|
|
} else {
|
||
|
|
iter[0] = widget.ub[0];
|
||
|
|
iter[1] = widget.ub[1];
|
||
|
|
iter[2] = widget.ub[2];
|
||
|
|
iter[3] = widget.ub[3];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
iter += element_size;
|
||
|
|
iter2++;
|
||
|
|
}
|
||
|
|
start += rowsize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|