OpenHarmony/third_party_mesa3d
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converted from GL_EXT_texture3D to GL 1.2

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This commit is contained in:
Brian Paul
2000-03-22 19:48:57 +00:00
parent d21cdb6d84
commit 49dcae8c80
1 changed files with 23 additions and 37 deletions
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60
progs/demos/stex3d.c
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@@ -1,4 +1,4 @@
/* $Id: stex3d.c,v 1.3 1999/12/16 08:54:22 brianp Exp $ */
/* $Id: stex3d.c,v 1.4 2000/03/22 19:48:57 brianp Exp $ */
/*-----------------------------
* stex3d.c GL example of the mesa 3d-texture extention to simulate procedural
@@ -17,6 +17,9 @@
/*
* $Log: stex3d.c,v $
* Revision 1.4 2000/03/22 19:48:57 brianp
* converted from GL_EXT_texture3D to GL 1.2
*
* Revision 1.3 1999/12/16 08:54:22 brianp
* added a cast to malloc call
*
@@ -56,7 +59,6 @@ void init(void),
initNoise(void);
float turbulence(float point[3], float lofreq, float hifreq);
int isExtSupported(char *ext);
void KeyHandler( unsigned char key, int x, int y );
GLenum parseCmdLine(int argc, char **argv);
float noise3(float vec[3]);
@@ -124,17 +126,20 @@ void init()
/* start the noise function variables */
initNoise();
/* see if the texture 3d extention is supported */
if (!isExtSupported("GL_EXT_texture3D")) {
printf("Sorry this GL implementation (%s) does not support 3d texture extentions\n",
(char *)(glGetString(GL_RENDERER)));
/* tkQuit();*/
/* see if we have OpenGL 1.2 or later, for 3D texturing */
{
const char *version = (const char *) glGetString(GL_VERSION);
if (strncmp(version, "1.0", 3) == 0 ||
strncmp(version, "1.1", 3) == 0) {
printf("Sorry, OpenGL 1.2 or later is required\n");
exit(1);
}
}
/* if texture is supported then generate the texture */
create3Dtexture();
glEnable(GL_TEXTURE_3D_EXT);
glEnable(GL_TEXTURE_3D);
/*
glBlendFunc(GL_SRC_COLOR, GL_SRC_ALPHA);
glEnable(GL_BLEND);
@@ -252,39 +257,20 @@ void create3Dtexture()
printf("setting up 3d texture...\n");
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_R_EXT, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glTexImage3DEXT(GL_TEXTURE_3D_EXT, 0, GL_RGBA,
tex_width, tex_height, tex_depth,
0, GL_RGBA, GL_UNSIGNED_BYTE, voxels);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA,
tex_width, tex_height, tex_depth,
0, GL_RGBA, GL_UNSIGNED_BYTE, voxels);
printf("finished setting up 3d texture image...\n");
}
int isExtSupported(char *ext)
{
/* routine to find whether a specified OpenGL extension is supported */
char *c;
int len;
char *allext = (char *)(glGetString(GL_EXTENSIONS));
len = strlen(ext);
if (len <= 0) return 0;
c = allext;
while (c) {
if (!strncmp(c,ext,len)) return 1;
c = strchr(c+1,'G');
}
return 0;
}
void printHelp()
{
printf("\nUsage: stex3d <cmd line options>\n");
@@ -435,10 +421,10 @@ void KeyHandler( unsigned char key, int x, int y )
angz-=10;
break;
case 't':
glEnable(GL_TEXTURE_3D_EXT);
glEnable(GL_TEXTURE_3D);
break;
case 'T':
glDisable(GL_TEXTURE_3D_EXT);
glDisable(GL_TEXTURE_3D);
break;
case 's':
glShadeModel(GL_SMOOTH);