mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
374 lines
9.0 KiB
374 lines
9.0 KiB
/*
|
|
* (c) Copyright 1993, Silicon Graphics, Inc.
|
|
* ALL RIGHTS RESERVED
|
|
* Permission to use, copy, modify, and distribute this software for
|
|
* any purpose and without fee is hereby granted, provided that the above
|
|
* copyright notice appear in all copies and that both the copyright notice
|
|
* and this permission notice appear in supporting documentation, and that
|
|
* the name of Silicon Graphics, Inc. not be used in advertising
|
|
* or publicity pertaining to distribution of the software without specific,
|
|
* written prior permission.
|
|
*
|
|
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
|
|
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
|
|
* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
|
|
* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
|
|
* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
|
|
* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
|
|
* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
|
|
* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
|
|
* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
|
|
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
|
|
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
|
|
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* US Government Users Restricted Rights
|
|
* Use, duplication, or disclosure by the Government is subject to
|
|
* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
|
|
* (c)(1)(ii) of the Rights in Technical Data and Computer Software
|
|
* clause at DFARS 252.227-7013 and/or in similar or successor
|
|
* clauses in the FAR or the DOD or NASA FAR Supplement.
|
|
* Unpublished-- rights reserved under the copyright laws of the
|
|
* United States. Contractor/manufacturer is Silicon Graphics,
|
|
* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
|
|
*
|
|
* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
|
|
*/
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <malloc.h>
|
|
#include <fcntl.h>
|
|
//#include <unistd.h>
|
|
#include <math.h>
|
|
#include "tk.h"
|
|
|
|
|
|
// fix up math definitions
|
|
#define logf log
|
|
#define powf pow
|
|
|
|
#define STEPCOUNT 40
|
|
#define FALSE 0
|
|
#define TRUE 1
|
|
#define MAX(a, b) (((a) > (b)) ? (a) : (b))
|
|
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
|
|
|
|
|
|
enum {
|
|
OP_NOOP = 0,
|
|
OP_STRETCH,
|
|
OP_DRAWPOINT,
|
|
OP_DRAWIMAGE
|
|
};
|
|
|
|
|
|
typedef struct _cRec {
|
|
float x, y;
|
|
} cRec;
|
|
|
|
typedef struct _vertexRec {
|
|
float x, y;
|
|
float dX, dY;
|
|
float tX, tY;
|
|
} vertexRec;
|
|
|
|
|
|
GLenum doubleBuffer, directRender;
|
|
int imageSizeX, imageSizeY;
|
|
char *fileName = 0;
|
|
TK_RGBImageRec *image;
|
|
cRec cList[50];
|
|
vertexRec vList[5];
|
|
int cCount, cIndex[2], cStep;
|
|
GLenum op = OP_NOOP;
|
|
|
|
|
|
void DrawImage(void)
|
|
{
|
|
|
|
glRasterPos2i(0, 0);
|
|
glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
|
|
image->data);
|
|
|
|
tkSwapBuffers();
|
|
|
|
glRasterPos2i(0, 0);
|
|
glDrawPixels(image->sizeX, image->sizeY, GL_RGB, GL_UNSIGNED_BYTE,
|
|
image->data);
|
|
}
|
|
|
|
void DrawPoint(void)
|
|
{
|
|
int i;
|
|
|
|
glColor3f(1.0, 0.0, 1.0);
|
|
glPointSize(3.0);
|
|
glBegin(GL_POINTS);
|
|
for (i = 0; i < cCount; i++) {
|
|
glVertex2f(cList[i].x, cList[i].y);
|
|
}
|
|
glEnd();
|
|
|
|
tkSwapBuffers();
|
|
}
|
|
|
|
void InitVList(void)
|
|
{
|
|
|
|
vList[0].x = 0.0;
|
|
vList[0].y = 0.0;
|
|
vList[0].dX = 0.0;
|
|
vList[0].dY = 0.0;
|
|
vList[0].tX = 0.0;
|
|
vList[0].tY = 0.0;
|
|
|
|
vList[1].x = (float)imageSizeX;
|
|
vList[1].y = 0.0;
|
|
vList[1].dX = 0.0;
|
|
vList[1].dY = 0.0;
|
|
vList[1].tX = 1.0;
|
|
vList[1].tY = 0.0;
|
|
|
|
vList[2].x = (float)imageSizeX;
|
|
vList[2].y = (float)imageSizeY;
|
|
vList[2].dX = 0.0;
|
|
vList[2].dY = 0.0;
|
|
vList[2].tX = 1.0;
|
|
vList[2].tY = 1.0;
|
|
|
|
vList[3].x = 0.0;
|
|
vList[3].y = (float)imageSizeY;
|
|
vList[3].dX = 0.0;
|
|
vList[3].dY = 0.0;
|
|
vList[3].tX = 0.0;
|
|
vList[3].tY = 1.0;
|
|
|
|
vList[4].x = cList[0].x;
|
|
vList[4].y = cList[0].y;
|
|
vList[4].dX = (cList[1].x - cList[0].x) / STEPCOUNT;
|
|
vList[4].dY = (cList[1].y - cList[0].y) / STEPCOUNT;
|
|
vList[4].tX = cList[0].x / (float)imageSizeX;
|
|
vList[4].tY = cList[0].y / (float)imageSizeY;
|
|
}
|
|
|
|
void ScaleImage(int sizeX, int sizeY)
|
|
{
|
|
GLubyte *buf;
|
|
|
|
buf = (GLubyte *)malloc(3*sizeX*sizeY);
|
|
gluScaleImage(GL_RGB, image->sizeX, image->sizeY, GL_UNSIGNED_BYTE,
|
|
image->data, sizeX, sizeY, GL_UNSIGNED_BYTE, buf);
|
|
free(image->data);
|
|
image->data = buf;
|
|
image->sizeX = sizeX;
|
|
image->sizeY = sizeY;
|
|
}
|
|
|
|
void SetPoint(int x, int y)
|
|
{
|
|
|
|
cList[cCount].x = (float)x;
|
|
cList[cCount].y = (float)y;
|
|
cCount++;
|
|
}
|
|
|
|
void Stretch(void)
|
|
{
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(vList[0].tX, vList[0].tY);
|
|
glVertex2f(vList[0].x, vList[0].y);
|
|
glTexCoord2f(vList[1].tX, vList[1].tY);
|
|
glVertex2f(vList[1].x, vList[1].y);
|
|
glTexCoord2f(vList[4].tX, vList[4].tY);
|
|
glVertex2f(vList[4].x, vList[4].y);
|
|
glEnd();
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(vList[1].tX, vList[1].tY);
|
|
glVertex2f(vList[1].x, vList[1].y);
|
|
glTexCoord2f(vList[2].tX, vList[2].tY);
|
|
glVertex2f(vList[2].x, vList[2].y);
|
|
glTexCoord2f(vList[4].tX, vList[4].tY);
|
|
glVertex2f(vList[4].x, vList[4].y);
|
|
glEnd();
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(vList[2].tX, vList[2].tY);
|
|
glVertex2f(vList[2].x, vList[2].y);
|
|
glTexCoord2f(vList[3].tX, vList[3].tY);
|
|
glVertex2f(vList[3].x, vList[3].y);
|
|
glTexCoord2f(vList[4].tX, vList[4].tY);
|
|
glVertex2f(vList[4].x, vList[4].y);
|
|
glEnd();
|
|
|
|
glBegin(GL_TRIANGLES);
|
|
glTexCoord2f(vList[3].tX, vList[3].tY);
|
|
glVertex2f(vList[3].x, vList[3].y);
|
|
glTexCoord2f(vList[0].tX, vList[0].tY);
|
|
glVertex2f(vList[0].x, vList[0].y);
|
|
glTexCoord2f(vList[4].tX, vList[4].tY);
|
|
glVertex2f(vList[4].x, vList[4].y);
|
|
glEnd();
|
|
|
|
tkSwapBuffers();
|
|
|
|
if (++cStep < STEPCOUNT) {
|
|
vList[4].x += vList[4].dX;
|
|
vList[4].y += vList[4].dY;
|
|
} else {
|
|
cIndex[0] = cIndex[1];
|
|
cIndex[1] = cIndex[1] + 1;
|
|
if (cIndex[1] == cCount) {
|
|
cIndex[1] = 0;
|
|
}
|
|
vList[4].dX = (cList[cIndex[1]].x - cList[cIndex[0]].x) / STEPCOUNT;
|
|
vList[4].dY = (cList[cIndex[1]].y - cList[cIndex[0]].y) / STEPCOUNT;
|
|
cStep = 0;
|
|
}
|
|
}
|
|
|
|
GLenum Key(int key, GLenum mask)
|
|
{
|
|
|
|
switch (key) {
|
|
case TK_ESCAPE:
|
|
free(image->data);
|
|
tkQuit();
|
|
case TK_SPACE:
|
|
if (cCount > 1) {
|
|
InitVList();
|
|
cIndex[0] = 0;
|
|
cIndex[1] = 1;
|
|
cStep = 0;
|
|
glEnable(GL_TEXTURE_2D);
|
|
op = OP_STRETCH;
|
|
}
|
|
break;
|
|
default:
|
|
return GL_FALSE;
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
GLenum Mouse(int mouseX, int mouseY, GLenum button)
|
|
{
|
|
|
|
if (op == OP_STRETCH) {
|
|
glDisable(GL_TEXTURE_2D);
|
|
cCount = 0;
|
|
op = OP_DRAWIMAGE;
|
|
} else {
|
|
SetPoint(mouseX, imageSizeY-mouseY);
|
|
op = OP_DRAWPOINT;
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
void Animate(void)
|
|
{
|
|
|
|
switch (op) {
|
|
case OP_STRETCH:
|
|
Stretch();
|
|
break;
|
|
case OP_DRAWPOINT:
|
|
DrawPoint();
|
|
break;
|
|
case OP_DRAWIMAGE:
|
|
DrawImage();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static GLenum Args(int argc, char **argv)
|
|
{
|
|
GLint i;
|
|
|
|
doubleBuffer = GL_FALSE;
|
|
directRender = GL_FALSE;
|
|
|
|
for (i = 1; i < argc; i++) {
|
|
if (strcmp(argv[i], "-sb") == 0) {
|
|
doubleBuffer = GL_FALSE;
|
|
} else if (strcmp(argv[i], "-db") == 0) {
|
|
doubleBuffer = GL_TRUE;
|
|
} else if (strcmp(argv[i], "-dr") == 0) {
|
|
directRender = GL_TRUE;
|
|
} else if (strcmp(argv[i], "-ir") == 0) {
|
|
directRender = GL_FALSE;
|
|
} else if (strcmp(argv[i], "-f") == 0) {
|
|
if (i+1 >= argc || argv[i+1][0] == '-') {
|
|
printf("-f (No file name).\n");
|
|
return GL_FALSE;
|
|
} else {
|
|
fileName = argv[++i];
|
|
}
|
|
} else {
|
|
printf("%s (Bad option).\n", argv[i]);
|
|
return GL_FALSE;
|
|
}
|
|
}
|
|
return GL_TRUE;
|
|
}
|
|
|
|
void main(int argc, char **argv)
|
|
{
|
|
GLenum type;
|
|
|
|
if (Args(argc, argv) == GL_FALSE) {
|
|
tkQuit();
|
|
}
|
|
|
|
if (fileName == 0) {
|
|
printf("No image file.\n");
|
|
tkQuit();
|
|
}
|
|
|
|
image = tkRGBImageLoad(fileName);
|
|
|
|
imageSizeX = (int)powf(2.0, (float)((int)(logf(image->sizeX)/logf(2.0))));
|
|
imageSizeY = (int)powf(2.0, (float)((int)(logf(image->sizeY)/logf(2.0))));
|
|
|
|
tkInitPosition(0, 0, imageSizeX, imageSizeY);
|
|
|
|
type = TK_RGB;
|
|
type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
|
|
type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
|
|
tkInitDisplayMode(type);
|
|
|
|
if (tkInitWindow("Stretch") == GL_FALSE) {
|
|
tkQuit();
|
|
}
|
|
|
|
glViewport(0, 0, imageSizeX, imageSizeY);
|
|
gluOrtho2D(0, imageSizeX, 0, imageSizeY);
|
|
glClearColor(0.0, 0.0, 0.0, 0.0);
|
|
|
|
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
|
|
glPixelStorei(GL_PACK_ALIGNMENT, 1);
|
|
|
|
ScaleImage(imageSizeX, imageSizeY);
|
|
|
|
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
|
|
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
|
|
glTexImage2D(GL_TEXTURE_2D, 0, 3, image->sizeX, image->sizeY, 0,
|
|
GL_RGB, GL_UNSIGNED_BYTE, (unsigned char *)image->data);
|
|
|
|
cCount = 0;
|
|
cIndex[0] = 0;
|
|
cIndex[1] = 0;
|
|
cStep = 0;
|
|
op = OP_DRAWIMAGE;
|
|
|
|
tkKeyDownFunc(Key);
|
|
tkMouseDownFunc(Mouse);
|
|
tkIdleFunc(Animate);
|
|
tkExec();
|
|
}
|