mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2026-05-22 15:18:09 +02:00
45efcc44c7
Cherry-picked from gallium-0.1 Conflicts: src/glu/sgi/libnurbs/interface/bezierEval.h src/glu/sgi/libnurbs/interface/bezierPatch.h src/glu/sgi/libnurbs/interface/bezierPatchMesh.h src/glu/sgi/libnurbs/internals/dataTransform.h src/glu/sgi/libnurbs/internals/displaymode.h src/glu/sgi/libnurbs/internals/sorter.h src/glu/sgi/libnurbs/nurbtess/definitions.h src/glu/sgi/libnurbs/nurbtess/directedLine.h src/glu/sgi/libnurbs/nurbtess/gridWrap.h src/glu/sgi/libnurbs/nurbtess/monoChain.h src/glu/sgi/libnurbs/nurbtess/monoPolyPart.h src/glu/sgi/libnurbs/nurbtess/monoTriangulation.h src/glu/sgi/libnurbs/nurbtess/partitionX.h src/glu/sgi/libnurbs/nurbtess/partitionY.h src/glu/sgi/libnurbs/nurbtess/polyDBG.h src/glu/sgi/libnurbs/nurbtess/polyUtil.h src/glu/sgi/libnurbs/nurbtess/primitiveStream.h src/glu/sgi/libnurbs/nurbtess/quicksort.h src/glu/sgi/libnurbs/nurbtess/rectBlock.h src/glu/sgi/libnurbs/nurbtess/sampleComp.h src/glu/sgi/libnurbs/nurbtess/sampleCompBot.h src/glu/sgi/libnurbs/nurbtess/sampleCompRight.h src/glu/sgi/libnurbs/nurbtess/sampleCompTop.h src/glu/sgi/libnurbs/nurbtess/sampleMonoPoly.h src/glu/sgi/libnurbs/nurbtess/sampledLine.h src/glu/sgi/libnurbs/nurbtess/searchTree.h src/glu/sgi/libnurbs/nurbtess/zlassert.h src/glu/sgi/libutil/error.c src/glu/sgi/libutil/glue.c src/glu/sgi/libutil/gluint.h src/glu/sgi/libutil/project.c src/glu/sgi/libutil/registry.c src/glx/x11/glxclient.h src/glx/x11/glxext.c src/mesa/drivers/dri/ffb/ffb_dd.h src/mesa/drivers/dri/ffb/ffb_points.h src/mesa/drivers/dri/gamma/gamma_context.h src/mesa/drivers/dri/gamma/gamma_macros.h src/mesa/drivers/dri/i810/i810context.h src/mesa/drivers/dri/r128/r128_dd.h src/mesa/drivers/dri/tdfx/tdfx_dd.h
763 lines
18 KiB
C
763 lines
18 KiB
C
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/*
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* Mesa 3-D graphics library
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* Version: 3.4
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* Copyright (C) 1995-2000 Brian Paul
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifdef PC_HEADER
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#include "all.h"
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#else
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#include <assert.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "gluP.h"
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#endif
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/*
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* Compute ceiling of integer quotient of A divided by B:
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*/
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#define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
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#ifdef EPSILON
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#undef EPSILON
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#endif
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#define EPSILON 0.001
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/* To work around optimizer bug in MSVC4.1 */
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#if defined(__WIN32__) && !defined(OPENSTEP)
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void
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dummy(GLuint j, GLuint k)
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{
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}
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#else
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#define dummy(J, K)
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#endif
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GLint GLAPIENTRY
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gluScaleImage(GLenum format,
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GLsizei widthin, GLsizei heightin,
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GLenum typein, const void *datain,
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GLsizei widthout, GLsizei heightout,
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GLenum typeout, void *dataout)
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{
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GLint components, i, j, k;
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GLfloat *tempin, *tempout, f;
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GLfloat sx, sy;
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GLint unpackrowlength, unpackalignment, unpackskiprows, unpackskippixels;
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GLint packrowlength, packalignment, packskiprows, packskippixels;
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GLint sizein, sizeout;
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GLint rowstride, rowlen;
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/* Determine number of components per pixel */
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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_LUMINANCE:
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components = 1;
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break;
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case GL_LUMINANCE_ALPHA:
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components = 2;
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break;
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case GL_RGB:
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case GL_BGR:
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components = 3;
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break;
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case GL_RGBA:
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case GL_BGRA:
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#ifdef GL_EXT_abgr
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case GL_ABGR_EXT:
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#endif
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components = 4;
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break;
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default:
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return GLU_INVALID_ENUM;
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}
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/* Determine bytes per input datum */
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switch (typein) {
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case GL_UNSIGNED_BYTE:
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sizein = sizeof(GLubyte);
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break;
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case GL_BYTE:
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sizein = sizeof(GLbyte);
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break;
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case GL_UNSIGNED_SHORT:
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sizein = sizeof(GLushort);
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break;
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case GL_SHORT:
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sizein = sizeof(GLshort);
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break;
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case GL_UNSIGNED_INT:
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sizein = sizeof(GLuint);
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break;
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case GL_INT:
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sizein = sizeof(GLint);
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break;
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case GL_FLOAT:
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sizein = sizeof(GLfloat);
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break;
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case GL_BITMAP:
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/* not implemented yet */
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default:
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return GL_INVALID_ENUM;
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}
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/* Determine bytes per output datum */
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switch (typeout) {
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case GL_UNSIGNED_BYTE:
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sizeout = sizeof(GLubyte);
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break;
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case GL_BYTE:
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sizeout = sizeof(GLbyte);
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break;
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case GL_UNSIGNED_SHORT:
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sizeout = sizeof(GLushort);
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break;
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case GL_SHORT:
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sizeout = sizeof(GLshort);
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break;
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case GL_UNSIGNED_INT:
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sizeout = sizeof(GLuint);
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break;
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case GL_INT:
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sizeout = sizeof(GLint);
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break;
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case GL_FLOAT:
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sizeout = sizeof(GLfloat);
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break;
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case GL_BITMAP:
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/* not implemented yet */
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default:
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return GL_INVALID_ENUM;
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}
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/* Get glPixelStore state */
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glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f;
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glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f;
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glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f;
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glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f;
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glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f;
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glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f;
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glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f;
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glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f;
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/* Allocate storage for intermediate images */
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tempin = (GLfloat *) malloc(widthin * heightin
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* components * sizeof(GLfloat));
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if (!tempin) {
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return GLU_OUT_OF_MEMORY;
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}
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tempout = (GLfloat *) malloc(widthout * heightout
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* components * sizeof(GLfloat));
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if (!tempout) {
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free(tempin);
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return GLU_OUT_OF_MEMORY;
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}
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/*
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* Unpack the pixel data and convert to floating point
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*/
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if (unpackrowlength > 0) {
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rowlen = unpackrowlength;
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}
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else {
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rowlen = widthin;
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}
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if (sizein >= unpackalignment) {
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rowstride = components * rowlen;
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}
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else {
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rowstride = unpackalignment / sizein
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* CEILING(components * rowlen * sizein, unpackalignment);
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}
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switch (typein) {
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case GL_UNSIGNED_BYTE:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLubyte *ubptr = (GLubyte *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * ubptr++;
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}
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}
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break;
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case GL_BYTE:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLbyte *bptr = (GLbyte *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * bptr++;
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}
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}
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break;
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case GL_UNSIGNED_SHORT:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLushort *usptr = (GLushort *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * usptr++;
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}
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}
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break;
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case GL_SHORT:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLshort *sptr = (GLshort *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * sptr++;
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}
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}
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break;
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case GL_UNSIGNED_INT:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLuint *uiptr = (GLuint *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * uiptr++;
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}
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}
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break;
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case GL_INT:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLint *iptr = (GLint *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = (GLfloat) * iptr++;
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}
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}
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break;
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case GL_FLOAT:
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k = 0;
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for (i = 0; i < heightin; i++) {
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GLfloat *fptr = (GLfloat *) datain
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+ i * rowstride
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+ unpackskiprows * rowstride + unpackskippixels * components;
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for (j = 0; j < widthin * components; j++) {
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dummy(j, k);
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tempin[k++] = *fptr++;
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}
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}
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break;
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default:
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return GLU_INVALID_ENUM;
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}
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/*
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* Scale the image!
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*/
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if (widthout > 1)
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sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
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else
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sx = (GLfloat) (widthin - 1);
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if (heightout > 1)
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sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
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else
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sy = (GLfloat) (heightin - 1);
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/*#define POINT_SAMPLE*/
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#ifdef POINT_SAMPLE
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for (i = 0; i < heightout; i++) {
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GLint ii = i * sy;
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for (j = 0; j < widthout; j++) {
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GLint jj = j * sx;
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GLfloat *src = tempin + (ii * widthin + jj) * components;
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GLfloat *dst = tempout + (i * widthout + j) * components;
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for (k = 0; k < components; k++) {
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*dst++ = *src++;
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}
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}
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}
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#else
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if (sx < 1.0 && sy < 1.0) {
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/* magnify both width and height: use weighted sample of 4 pixels */
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GLint i0, i1, j0, j1;
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GLfloat alpha, beta;
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GLfloat *src00, *src01, *src10, *src11;
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GLfloat s1, s2;
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GLfloat *dst;
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for (i = 0; i < heightout; i++) {
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i0 = i * sy;
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i1 = i0 + 1;
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if (i1 >= heightin)
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i1 = heightin - 1;
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/* i1 = (i+1) * sy - EPSILON;*/
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alpha = i * sy - i0;
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for (j = 0; j < widthout; j++) {
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j0 = j * sx;
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j1 = j0 + 1;
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if (j1 >= widthin)
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j1 = widthin - 1;
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/* j1 = (j+1) * sx - EPSILON; */
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beta = j * sx - j0;
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/* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
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src00 = tempin + (i0 * widthin + j0) * components;
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src01 = tempin + (i0 * widthin + j1) * components;
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src10 = tempin + (i1 * widthin + j0) * components;
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src11 = tempin + (i1 * widthin + j1) * components;
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dst = tempout + (i * widthout + j) * components;
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for (k = 0; k < components; k++) {
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s1 = *src00++ * (1.0 - beta) + *src01++ * beta;
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s2 = *src10++ * (1.0 - beta) + *src11++ * beta;
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*dst++ = s1 * (1.0 - alpha) + s2 * alpha;
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}
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}
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}
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}
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else {
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/* shrink width and/or height: use an unweighted box filter */
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GLint i0, i1;
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GLint j0, j1;
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GLint ii, jj;
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GLfloat sum, *dst;
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for (i = 0; i < heightout; i++) {
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i0 = i * sy;
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i1 = i0 + 1;
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if (i1 >= heightin)
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i1 = heightin - 1;
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/* i1 = (i+1) * sy - EPSILON; */
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for (j = 0; j < widthout; j++) {
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j0 = j * sx;
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j1 = j0 + 1;
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if (j1 >= widthin)
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j1 = widthin - 1;
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/* j1 = (j+1) * sx - EPSILON; */
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dst = tempout + (i * widthout + j) * components;
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/* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */
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for (k = 0; k < components; k++) {
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sum = 0.0;
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for (ii = i0; ii <= i1; ii++) {
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for (jj = j0; jj <= j1; jj++) {
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sum += *(tempin + (ii * widthin + jj) * components + k);
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}
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}
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sum /= (j1 - j0 + 1) * (i1 - i0 + 1);
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*dst++ = sum;
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}
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}
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}
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}
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#endif
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/*
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* Return output image
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*/
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if (packrowlength > 0) {
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rowlen = packrowlength;
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}
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else {
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rowlen = widthout;
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}
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if (sizeout >= packalignment) {
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rowstride = components * rowlen;
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}
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else {
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rowstride = packalignment / sizeout
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* CEILING(components * rowlen * sizeout, packalignment);
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}
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switch (typeout) {
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case GL_UNSIGNED_BYTE:
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k = 0;
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for (i = 0; i < heightout; i++) {
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GLubyte *ubptr = (GLubyte *) dataout
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+ i * rowstride
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+ packskiprows * rowstride + packskippixels * components;
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for (j = 0; j < widthout * components; j++) {
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dummy(j, k + i);
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*ubptr++ = (GLubyte) tempout[k++];
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}
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}
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break;
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case GL_BYTE:
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k = 0;
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for (i = 0; i < heightout; i++) {
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GLbyte *bptr = (GLbyte *) dataout
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+ i * rowstride
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+ packskiprows * rowstride + packskippixels * components;
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for (j = 0; j < widthout * components; j++) {
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dummy(j, k + i);
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*bptr++ = (GLbyte) tempout[k++];
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}
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}
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break;
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case GL_UNSIGNED_SHORT:
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k = 0;
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for (i = 0; i < heightout; i++) {
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GLushort *usptr = (GLushort *) dataout
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+ i * rowstride
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+ packskiprows * rowstride + packskippixels * components;
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for (j = 0; j < widthout * components; j++) {
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dummy(j, k + i);
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*usptr++ = (GLushort) tempout[k++];
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}
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}
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break;
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case GL_SHORT:
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k = 0;
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for (i = 0; i < heightout; i++) {
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GLshort *sptr = (GLshort *) dataout
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+ i * rowstride
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+ packskiprows * rowstride + packskippixels * components;
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for (j = 0; j < widthout * components; j++) {
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dummy(j, k + i);
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*sptr++ = (GLshort) tempout[k++];
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}
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}
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break;
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case GL_UNSIGNED_INT:
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k = 0;
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for (i = 0; i < heightout; i++) {
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GLuint *uiptr = (GLuint *) dataout
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+ i * rowstride
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+ 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 data type, 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)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
GLint GLAPIENTRY
|
|
gluBuild2DMipmaps(GLenum target, GLint components,
|
|
GLsizei width, GLsizei height, GLenum format,
|
|
GLenum type, const void *data)
|
|
{
|
|
GLint w, h;
|
|
GLint 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;
|
|
GLfloat f;
|
|
|
|
if (width < 1 || height < 1)
|
|
return GLU_INVALID_VALUE;
|
|
|
|
glGetFloatv(GL_MAX_TEXTURE_SIZE, &f); maxsize = (int)f;
|
|
|
|
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 */
|
|
glGetFloatv(GL_UNPACK_ROW_LENGTH, &f); unpackrowlength = (int)f;
|
|
glGetFloatv(GL_UNPACK_ALIGNMENT, &f); unpackalignment = (int)f;
|
|
glGetFloatv(GL_UNPACK_SKIP_ROWS, &f); unpackskiprows = (int)f;
|
|
glGetFloatv(GL_UNPACK_SKIP_PIXELS, &f); unpackskippixels = (int)f;
|
|
glGetFloatv(GL_PACK_ROW_LENGTH, &f); packrowlength = (int)f;
|
|
glGetFloatv(GL_PACK_ALIGNMENT, &f); packalignment = (int)f;
|
|
glGetFloatv(GL_PACK_SKIP_ROWS, &f); packskiprows = (int)f;
|
|
glGetFloatv(GL_PACK_SKIP_PIXELS, &f); packskippixels = (int)f;
|
|
|
|
/* 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;
|
|
}
|