diff options
| -rw-r--r-- | progs/demos/multiarb.c | 303 |
1 files changed, 122 insertions, 181 deletions
diff --git a/progs/demos/multiarb.c b/progs/demos/multiarb.c index 211ae17114..c4671b516c 100644 --- a/progs/demos/multiarb.c +++ b/progs/demos/multiarb.c @@ -1,4 +1,4 @@ -/* $Id: multiarb.c,v 1.10 2001/06/20 19:12:30 brianp Exp $ */ +/* $Id: multiarb.c,v 1.11 2002/02/13 02:23:33 brianp Exp $ */ /* * GL_ARB_multitexture demo @@ -8,72 +8,7 @@ * * * Brian Paul November 1998 This program is in the public domain. - */ - -/* - * $Log: multiarb.c,v $ - * Revision 1.10 2001/06/20 19:12:30 brianp - * also print GL_MAX_TEXTURE_SIZE - * - * Revision 1.9 2001/06/13 14:33:16 brianp - * moved glTexEnvi calls to better logical locations - * - * Revision 1.8 2000/12/24 22:53:54 pesco - * * demos/Makefile.am (INCLUDES): Added -I$(top_srcdir)/util. - * * demos/Makefile.X11, demos/Makefile.BeOS-R4, demos/Makefile.cygnus: - * Essentially the same. - * Program files updated to include "readtex.c", not "../util/readtex.c". - * * demos/reflect.c: Likewise for "showbuffer.c". - * - * - * * Makefile.am (EXTRA_DIST): Added top-level regular files. - * - * * include/GL/Makefile.am (INC_X11): Added glxext.h. - * - * - * * src/GGI/include/ggi/mesa/Makefile.am (EXTRA_HEADERS): Include - * Mesa GGI headers in dist even if HAVE_GGI is not given. - * - * * configure.in: Look for GLUT and demo source dirs in $srcdir. - * - * * src/swrast/Makefile.am (libMesaSwrast_la_SOURCES): Set to *.[ch]. - * More source list updates in various Makefile.am's. - * - * * Makefile.am (dist-hook): Remove CVS directory from distribution. - * (DIST_SUBDIRS): List all possible subdirs here. - * (SUBDIRS): Only list subdirs selected for build again. - * The above two applied to all subdir Makefile.am's also. - * - * Revision 1.7 2000/11/01 16:02:01 brianp - * print number of texture units - * - * Revision 1.6 2000/05/23 23:21:00 brianp - * set default window pos - * - * Revision 1.5 2000/02/02 17:31:45 brianp - * changed > to >= - * - * Revision 1.4 2000/02/02 01:07:21 brianp - * limit Drift to [0, 1] - * - * Revision 1.3 1999/10/21 16:40:32 brianp - * added -info command line option - * - * Revision 1.2 1999/10/13 12:02:13 brianp - * use texture objects now - * - * Revision 1.1.1.1 1999/08/19 00:55:40 jtg - * Imported sources - * - * Revision 1.3 1999/03/28 18:20:49 brianp - * minor clean-up - * - * Revision 1.2 1998/11/05 04:34:04 brianp - * moved image files to ../images/ directory - * - * Revision 1.1 1998/11/03 01:36:33 brianp - * Initial revision - * + * Modified on 12 Feb 2002 for > 2 texture units. */ @@ -89,12 +24,13 @@ #define TEXTURE_2_FILE "../images/reflect.rgb" #define TEX0 1 -#define TEX1 2 -#define TEXBOTH 3 +#define TEX7 8 #define ANIMATE 10 #define QUIT 100 static GLboolean Animate = GL_TRUE; +static GLint NumUnits = 1; +static GLboolean TexEnabled[8]; static GLfloat Drift = 0.0; static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0; @@ -104,24 +40,30 @@ static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0; static void Idle( void ) { if (Animate) { + GLint i; + Drift += 0.05; if (Drift >= 1.0) Drift = 0.0; -#ifdef GL_ARB_multitexture - glActiveTextureARB(GL_TEXTURE0_ARB); -#endif - glMatrixMode(GL_TEXTURE); - glLoadIdentity(); - glTranslatef(Drift, 0.0, 0.0); - glMatrixMode(GL_MODELVIEW); - -#ifdef GL_ARB_multitexture - glActiveTextureARB(GL_TEXTURE1_ARB); -#endif - glMatrixMode(GL_TEXTURE); - glLoadIdentity(); - glTranslatef(0.0, Drift, 0.0); + for (i = 0; i < NumUnits; i++) { + glActiveTextureARB(GL_TEXTURE0_ARB + i); + glMatrixMode(GL_TEXTURE); + glLoadIdentity(); + if (i == 0) { + glTranslatef(Drift, 0.0, 0.0); + glScalef(2, 2, 2); + } + else if (i == 1) { + glTranslatef(0.0, Drift, 0.0); + } + else { + glTranslatef(0.5, 0.5, 0.0); + glRotatef(180.0 * Drift, 0, 0, 1); + glScalef(1.0/i, 1.0/i, 1.0/i); + glTranslatef(-0.5, -0.5, 0.0); + } + } glMatrixMode(GL_MODELVIEW); glutPostRedisplay(); @@ -131,37 +73,30 @@ static void Idle( void ) static void DrawObject(void) { - glBegin(GL_QUADS); - -#ifdef GL_ARB_multitexture - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 0.0); - glVertex2f(-1.0, -1.0); + GLint i; - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 0.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 0.0); - glVertex2f(1.0, -1.0); + if (!TexEnabled[0] && !TexEnabled[1]) + glColor3f(0.1, 0.1, 0.1); /* add onto this */ + else + glColor3f(1, 1, 1); /* modulate this */ - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 2.0, 2.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, 1.0); - glVertex2f(1.0, 1.0); + glBegin(GL_QUADS); - glMultiTexCoord2fARB(GL_TEXTURE0_ARB, 0.0, 2.0); - glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, 1.0); - glVertex2f(-1.0, 1.0); -#else - glTexCoord2f(0.0, 0.0); + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 0.0, 0.0); glVertex2f(-1.0, -1.0); - glTexCoord2f(1.0, 0.0); + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 1.0, 0.0); glVertex2f(1.0, -1.0); - glTexCoord2f(1.0, 1.0); + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 1.0, 1.0); glVertex2f(1.0, 1.0); - glTexCoord2f(0.0, 1.0); + for (i = 0; i < NumUnits; i++) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, 0.0, 1.0); glVertex2f(-1.0, 1.0); -#endif glEnd(); } @@ -199,16 +134,19 @@ static void Reshape( int width, int height ) static void ModeMenu(int entry) { - GLboolean enable0 = GL_FALSE, enable1 = GL_FALSE; - if (entry==TEX0) { - enable0 = GL_TRUE; - } - else if (entry==TEX1) { - enable1 = GL_TRUE; - } - else if (entry==TEXBOTH) { - enable0 = GL_TRUE; - enable1 = GL_TRUE; + if (entry >= TEX0 && entry <= TEX7) { + /* toggle */ + GLint i = entry - TEX0; + TexEnabled[i] = !TexEnabled[i]; + glActiveTextureARB(GL_TEXTURE0_ARB + i); + if (TexEnabled[i]) + glEnable(GL_TEXTURE_2D); + else + glDisable(GL_TEXTURE_2D); + printf("Enabled: "); + for (i = 0; i < NumUnits; i++) + printf("%d ", (int) TexEnabled[i]); + printf("\n"); } else if (entry==ANIMATE) { Animate = !Animate; @@ -217,26 +155,6 @@ static void ModeMenu(int entry) exit(0); } - if (entry != ANIMATE) { -#ifdef GL_ARB_multitexture - glActiveTextureARB(GL_TEXTURE0_ARB); -#endif - if (enable0) { - glEnable(GL_TEXTURE_2D); - } - else - glDisable(GL_TEXTURE_2D); - -#ifdef GL_ARB_multitexture - glActiveTextureARB(GL_TEXTURE1_ARB); -#endif - if (enable1) { - glEnable(GL_TEXTURE_2D); - } - else - glDisable(GL_TEXTURE_2D); - } - glutPostRedisplay(); } @@ -280,8 +198,8 @@ static void SpecialKey( int key, int x, int y ) static void Init( int argc, char *argv[] ) { - GLuint texObj[2]; - GLint units, size; + GLuint texObj[8]; + GLint size, i; const char *exten = (const char *) glGetString(GL_EXTENSIONS); if (!strstr(exten, "GL_ARB_multitexture")) { @@ -289,64 +207,82 @@ static void Init( int argc, char *argv[] ) exit(1); } - glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &units); - printf("%d texture units supported\n", units); + glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &NumUnits); + printf("%d texture units supported\n", NumUnits); + if (NumUnits > 8) + NumUnits = 8; glGetIntegerv(GL_MAX_TEXTURE_SIZE, &size); printf("%d x %d max texture size\n", size, size); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + for (i = 0; i < NumUnits; i++) { + if (i < 2) + TexEnabled[i] = GL_TRUE; + else + TexEnabled[i] = GL_FALSE; + } + /* allocate two texture objects */ - glGenTextures(2, texObj); + glGenTextures(NumUnits, texObj); - /* setup texture obj 0 */ - glBindTexture(GL_TEXTURE_2D, texObj[0]); -#ifdef LINEAR_FILTER - /* linear filtering looks much nicer but is much slower for Mesa */ - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); -#else - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); -#endif - if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) { - printf("Error: couldn't load texture image\n"); - exit(1); - } + /* setup the texture objects */ + for (i = 0; i < NumUnits; i++) { + glActiveTextureARB(GL_TEXTURE0_ARB + i); + glBindTexture(GL_TEXTURE_2D, texObj[i]); - /* setup texture obj 1 */ - glBindTexture(GL_TEXTURE_2D, texObj[1]); -#ifdef LINEAR_FILTER - /* linear filtering looks much nicer but is much slower for Mesa */ - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); -#else - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); -#endif - if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) { - printf("Error: couldn't load texture image\n"); - exit(1); - } + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + if (i == 0) { + if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) { + printf("Error: couldn't load texture image\n"); + exit(1); + } + } + else if (i == 1) { + if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) { + printf("Error: couldn't load texture image\n"); + exit(1); + } + } + else { + /* checker */ + GLubyte image[8][8][3]; + GLint i, j; + for (i = 0; i < 8; i++) { + for (j = 0; j < 8; j++) { + if ((i + j) & 1) { + image[i][j][0] = 50; + image[i][j][1] = 50; + image[i][j][2] = 50; + } + else { + image[i][j][0] = 25; + image[i][j][1] = 25; + image[i][j][2] = 25; + } + } + } + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, 8, 8, 0, + GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *) image); + } - /* now bind the texture objects to the respective texture units */ -#ifdef GL_ARB_multitexture - glActiveTextureARB(GL_TEXTURE0_ARB); - glBindTexture(GL_TEXTURE_2D, texObj[0]); - glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); - glActiveTextureARB(GL_TEXTURE1_ARB); - glBindTexture(GL_TEXTURE_2D, texObj[1]); - glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); -#endif + /* Bind texObj[i] to ith texture unit */ + if (i < 2) + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); + else + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD); + + if (TexEnabled[i]) + glEnable(GL_TEXTURE_2D); + } glShadeModel(GL_FLAT); glClearColor(0.3, 0.3, 0.4, 1.0); - ModeMenu(TEXBOTH); - if (argc > 1 && strcmp(argv[1], "-info")==0) { printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); @@ -358,6 +294,8 @@ static void Init( int argc, char *argv[] ) int main( int argc, char *argv[] ) { + GLint i; + glutInit( &argc, argv ); glutInitWindowSize( 300, 300 ); glutInitWindowPosition( 0, 0 ); @@ -373,9 +311,12 @@ int main( int argc, char *argv[] ) glutIdleFunc( Idle ); glutCreateMenu(ModeMenu); - glutAddMenuEntry("Texture 0", TEX0); - glutAddMenuEntry("Texture 1", TEX1); - glutAddMenuEntry("Multi-texture", TEXBOTH); + + for (i = 0; i < NumUnits; i++) { + char s[100]; + sprintf(s, "Toggle Texture %d", i); + glutAddMenuEntry(s, TEX0 + i); + } glutAddMenuEntry("Toggle Animation", ANIMATE); glutAddMenuEntry("Quit", QUIT); glutAttachMenu(GLUT_RIGHT_BUTTON); |