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Diffstat (limited to 'progs/demos/texenv.c')
| -rw-r--r-- | progs/demos/texenv.c | 817 |
1 files changed, 0 insertions, 817 deletions
diff --git a/progs/demos/texenv.c b/progs/demos/texenv.c deleted file mode 100644 index 260ca8718f..0000000000 --- a/progs/demos/texenv.c +++ /dev/null @@ -1,817 +0,0 @@ - -/* Copyright (c) Mark J. Kilgard, 1994. */ - -/** - * (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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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. - */ - -/* - * Demonstrates texture environment modes and internal image formats. - */ - -/* - * Hacked on, updated by Gareth Hughes <gareth@valinux.com> - */ - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <GL/glut.h> - -#undef max -#undef min -#define max( a, b ) ((a) >= (b) ? (a) : (b)) -#define min( a, b ) ((a) <= (b) ? (a) : (b)) - -GLfloat lightCheck[4] = { 0.7, 0.7, 0.7, 1.0 }; -GLfloat darkCheck[4] = { 0.3, 0.3, 0.3, 1.0 }; - -GLfloat labelColor0[4] = { 1.0, 1.0, 1.0, 1.0 }; -GLfloat labelColor1[4] = { 1.0, 1.0, 0.4, 1.0 }; -GLfloat *labelInfoColor = labelColor0; -GLfloat labelLevelColor0[4] = { 0.8, 0.8, 0.1, 1.0 }; -GLfloat labelLevelColor1[4] = { 0.0, 0.0, 0.0, 1.0 }; - -GLboolean doubleBuffered = GL_TRUE; -GLboolean drawBackground = GL_FALSE; -GLboolean drawBlended = GL_TRUE; -GLboolean drawSmooth = GL_FALSE; -GLboolean drawTextured = GL_TRUE; -GLboolean displayLevelInfo = GL_FALSE; - -int textureWidth = 64; -int textureHeight = 64; - -int winWidth = 580, winHeight = 720; -static int Win; - - -struct formatInfo { - GLenum baseFormat; - GLenum internalFormat; - char *name; -}; - -#define NUM_LUMINANCE_FORMATS (sizeof(luminanceFormats) / sizeof(luminanceFormats[0])) -struct formatInfo luminanceFormats[] = -{ - { GL_LUMINANCE, GL_LUMINANCE, "LUMINANCE" }, - { GL_LUMINANCE, GL_LUMINANCE4, "LUMINANCE4" }, - { GL_LUMINANCE, GL_LUMINANCE8, "LUMINANCE8" }, - { GL_LUMINANCE, GL_LUMINANCE12, "LUMINANCE12" }, - { GL_LUMINANCE, GL_LUMINANCE16, "LUMINANCE16" }, -}; - -#define NUM_ALPHA_FORMATS (sizeof(alphaFormats) / sizeof(alphaFormats[0])) -struct formatInfo alphaFormats[] = -{ - { GL_ALPHA, GL_ALPHA, "ALPHA" }, - { GL_ALPHA, GL_ALPHA4, "ALPHA4" }, - { GL_ALPHA, GL_ALPHA8, "ALPHA8" }, - { GL_ALPHA, GL_ALPHA12, "ALPHA12" }, - { GL_ALPHA, GL_ALPHA16, "ALPHA16" }, -}; - -#define NUM_INTENSITY_FORMATS (sizeof(intensityFormats) / sizeof(intensityFormats[0])) -struct formatInfo intensityFormats[] = -{ - { GL_INTENSITY, GL_INTENSITY, "INTENSITY" }, - { GL_INTENSITY, GL_INTENSITY4, "INTENSITY4" }, - { GL_INTENSITY, GL_INTENSITY8, "INTENSITY8" }, - { GL_INTENSITY, GL_INTENSITY12, "INTENSITY12" }, - { GL_INTENSITY, GL_INTENSITY16, "INTENSITY16" }, -}; - -#define NUM_LUMINANCE_ALPHA_FORMATS (sizeof(luminanceAlphaFormats) / sizeof(luminanceAlphaFormats[0])) -struct formatInfo luminanceAlphaFormats[] = -{ - { GL_LUMINANCE_ALPHA, GL_LUMINANCE_ALPHA, "LUMINANCE_ALPHA" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE4_ALPHA4, "LUMINANCE4_ALPHA4" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE6_ALPHA2, "LUMINANCE6_ALPHA2" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE8_ALPHA8, "LUMINANCE8_ALPHA8" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE12_ALPHA4, "LUMINANCE12_ALPHA4" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE12_ALPHA12, "LUMINANCE12_ALPHA12" }, - { GL_LUMINANCE_ALPHA, GL_LUMINANCE16_ALPHA16, "LUMINANCE16_ALPHA16" }, -}; - -#define NUM_RGB_FORMATS (sizeof(rgbFormats) / sizeof(rgbFormats[0])) -struct formatInfo rgbFormats[] = -{ - { GL_RGB, GL_RGB, "RGB" }, - { GL_RGB, GL_R3_G3_B2, "R3_G3_B2" }, - { GL_RGB, GL_RGB4, "RGB4" }, - { GL_RGB, GL_RGB5, "RGB5" }, - { GL_RGB, GL_RGB8, "RGB8" }, - { GL_RGB, GL_RGB10, "RGB10" }, - { GL_RGB, GL_RGB12, "RGB12" }, - { GL_RGB, GL_RGB16, "RGB16" }, -}; - -#define NUM_RGBA_FORMATS (sizeof(rgbaFormats) / sizeof(rgbaFormats[0])) -struct formatInfo rgbaFormats[] = -{ - { GL_RGBA, GL_RGBA, "RGBA" }, - { GL_RGBA, GL_RGBA2, "RGBA2" }, - { GL_RGBA, GL_RGBA4, "RGBA4" }, - { GL_RGBA, GL_RGB5_A1, "RGB5_A1" }, - { GL_RGBA, GL_RGBA8, "RGBA8" }, - { GL_RGBA, GL_RGB10_A2, "RGB10_A2" }, - { GL_RGBA, GL_RGBA12, "RGBA12" }, - { GL_RGBA, GL_RGBA16, "RGBA16" }, -}; - -struct baseFormatInfo { - struct formatInfo *format; - int current, number; -}; - -#define NUM_BASE_FORMATS (sizeof(baseFormats) / sizeof(baseFormats[0])) -int baseFormat; -struct baseFormatInfo baseFormats[] = -{ - { luminanceFormats, 0, NUM_LUMINANCE_FORMATS }, - { alphaFormats, 0, NUM_ALPHA_FORMATS }, - { intensityFormats, 0, NUM_INTENSITY_FORMATS }, - { luminanceAlphaFormats, 0, NUM_LUMINANCE_ALPHA_FORMATS }, - { rgbFormats, 0, NUM_RGB_FORMATS }, - { rgbaFormats, 0, NUM_RGBA_FORMATS }, -}; - -#define NUM_ENV_COLORS (sizeof(envColors) / sizeof(envColors[0])) -int envColor = 0; -GLfloat envColors[][4] = -{ - { 0.0, 0.0, 0.0, 1.0 }, - { 1.0, 0.0, 0.0, 1.0 }, - { 0.0, 1.0, 0.0, 1.0 }, - { 0.0, 0.0, 1.0, 1.0 }, - { 1.0, 1.0, 1.0, 1.0 }, -}; - -struct envModeInfo { - GLenum mode; - char *name; -}; - -/* allow for run-time check for GL_EXT_texture_env_add */ -int NUM_ENV_MODES = 5; -struct envModeInfo envModes[] = -{ - { GL_REPLACE, "REPLACE" }, - { GL_MODULATE, "MODULATE" }, - { GL_BLEND, "BLEND" }, - { GL_DECAL, "DECAL" }, -#if GL_EXT_texture_env_add - { GL_ADD, "ADD" }, -#endif -}; - -static void checkErrors( void ) -{ - GLenum error; - - while ( (error = glGetError()) != GL_NO_ERROR ) { - fprintf( stderr, "Error: %s\n", (char *) gluErrorString( error ) ); - } -} - -static void drawString( const char *string, GLfloat x, GLfloat y, - const GLfloat color[4] ) -{ - glColor4fv( color ); - glRasterPos2f( x, y ); - - while ( *string ) { - glutBitmapCharacter( GLUT_BITMAP_TIMES_ROMAN_10, *string ); - string++; - } -} - -static void drawStringOutline( const char *string, GLfloat x, GLfloat y, - const GLfloat color[4], - const GLfloat outline[4] ) -{ - drawString( string, x - 1, y, outline ); - drawString( string, x + 1, y, outline ); - drawString( string, x, y - 1, outline ); - drawString( string, x, y + 1, outline ); - drawString( string, x, y, color ); -} - -static void begin2D( int width, int height ) -{ - glMatrixMode( GL_PROJECTION ); - - glPushMatrix(); - glLoadIdentity(); - - glOrtho( 0, width, 0, height, -1, 1 ); - glMatrixMode( GL_MODELVIEW ); - - glPushMatrix(); - glLoadIdentity(); -} - -static void end2D( void ) -{ - glMatrixMode( GL_PROJECTION ); - glPopMatrix(); - glMatrixMode( GL_MODELVIEW ); - glPopMatrix(); -} - -static void initialize( void ) -{ - glMatrixMode( GL_PROJECTION ); - glLoadIdentity(); - - glOrtho( -1.5, 1.5, -1.5, 1.5, -1.5, 1.5 ); - - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - - glShadeModel( GL_FLAT ); -} - -/* ARGSUSED1 */ -static void keyboard( unsigned char c, int x, int y ) -{ - switch ( c ) { - case 'c': - envColor++; - envColor = envColor % (int) NUM_ENV_COLORS; - break; - case 'g': - drawBackground = !drawBackground; - break; - case 'b': - drawBlended = !drawBlended; - break; - case 's': - drawSmooth = !drawSmooth; - break; - case 't': - drawTextured = !drawTextured; - break; - case 'i': - displayLevelInfo = !displayLevelInfo; - break; - case 27: /* Escape key should force exit. */ - glutDestroyWindow(Win); - exit(0); - break; - default: - break; - } - glutPostRedisplay(); -} - -/* ARGSUSED1 */ -static void special( int key, int x, int y ) -{ - switch ( key ) { - case GLUT_KEY_DOWN: - if ( ++baseFormat > NUM_BASE_FORMATS - 1 ) { - baseFormat = 0; - } - break; - case GLUT_KEY_UP: - if ( --baseFormat < 0 ) { - baseFormat = NUM_BASE_FORMATS - 1; - } - break; - case GLUT_KEY_LEFT: - --baseFormats[baseFormat].current; - if ( baseFormats[baseFormat].current < 0 ) { - baseFormats[baseFormat].current = baseFormats[baseFormat].number - 1; - } - break; - case GLUT_KEY_RIGHT: - ++baseFormats[baseFormat].current; - if ( baseFormats[baseFormat].current > baseFormats[baseFormat].number - 1 ) { - baseFormats[baseFormat].current = 0; - } - break; - default: - break; - } - glutPostRedisplay(); -} - -static void -reshape( int w, int h ) -{ - winWidth = w; - winHeight = h; - /* No need to call glViewPort here since "draw" calls it! */ -} - -static void loadTexture( int width, int height, - const struct formatInfo *format ) -{ - int luminanceSize = 0; - int alphaSize = 0; - int rgbSize = 0; - GLenum textureFormat; - GLubyte *texImage, *p; - int elementsPerGroup, elementSize, groupSize, rowSize; - int i, j; - - switch ( format->baseFormat ) { - case GL_LUMINANCE: - luminanceSize = 1; - textureFormat = GL_LUMINANCE; - break; - case GL_INTENSITY: - luminanceSize = 1; - /* Note: format=GL_INTENSITY for glTexImage is not legal */ - textureFormat = GL_LUMINANCE; - break; - case GL_ALPHA: - alphaSize = 1; - textureFormat = GL_ALPHA; - break; - case GL_LUMINANCE_ALPHA: - luminanceSize = 1; - alphaSize = 1; - textureFormat = GL_LUMINANCE_ALPHA; - break; - case GL_RGB: - rgbSize = 3; - textureFormat = GL_RGB; - break; - case GL_RGBA: - rgbSize = 3; - alphaSize = 1; - textureFormat = GL_RGBA; - break; - default: - fprintf(stderr, "bad internal format info\n"); - return; - } - - elementsPerGroup = luminanceSize + alphaSize + rgbSize; - elementSize = sizeof(GLubyte); - groupSize = elementsPerGroup * elementSize; - rowSize = width * groupSize; - - if ( (texImage = (GLubyte *) malloc( height * rowSize ) ) == NULL ) { - fprintf( stderr, "texture malloc failed\n" ); - return; - } - - for ( i = 0 ; i < height ; i++ ) - { - p = texImage + i * rowSize; - - for ( j = 0 ; j < width ; j++ ) - { - if ( luminanceSize > 0 ) - { - /** - ** +-----+-----+ - ** | | | - ** | W | LG | - ** | | | - ** +-----+-----+ - ** | | | - ** | DG | B | - ** | | | - ** +-----+-----+ - **/ - if ( i > height / 2 ) { - if ( j < width / 2 ) { - p[0] = 0xff; - } else { - p[0] = 0xaa; - } - } else { - if ( j < width / 2 ) { - p[0] = 0x55; - } else { - p[0] = 0x00; - } - } - p += elementSize; - } - - if ( rgbSize > 0 ) - { - /** - ** +-----+-----+ - ** | | | - ** | R | G | - ** | | | - ** +-----+-----+ - ** | | | - ** | Y | B | - ** | | | - ** +-----+-----+ - **/ - if ( i > height / 2 ) { - if ( j < width / 2 ) { - p[0] = 0xff; - p[1] = 0x00; - p[2] = 0x00; - } else { - p[0] = 0x00; - p[1] = 0xff; - p[2] = 0x00; - } - } else { - if ( j < width / 2 ) { - p[0] = 0xff; - p[1] = 0xff; - p[2] = 0x00; - } else { - p[0] = 0x00; - p[1] = 0x00; - p[2] = 0xff; - } - } - p += 3 * elementSize; - } - - if ( alphaSize > 0 ) - { - /** - ** +-----------+ - ** | W | - ** | +-----+ | - ** | | | | - ** | | B | | - ** | | | | - ** | +-----+ | - ** | | - ** +-----------+ - **/ - int i2 = i - height / 2; - int j2 = j - width / 2; - int h8 = height / 8; - int w8 = width / 8; - if ( -h8 <= i2 && i2 <= h8 && -w8 <= j2 && j2 <= w8 ) { - p[0] = 0x00; - } else if ( -2 * h8 <= i2 && i2 <= 2 * h8 && -2 * w8 <= j2 && j2 <= 2 * w8 ) { - p[0] = 0x55; - } else if ( -3 * h8 <= i2 && i2 <= 3 * h8 && -3 * w8 <= j2 && j2 <= 3 * w8 ) { - p[0] = 0xaa; - } else { - p[0] = 0xff; - } - p += elementSize; - } - } - } - - glTexImage2D( GL_TEXTURE_2D, 0, - format->internalFormat, width, height, 0, - textureFormat, GL_UNSIGNED_BYTE, texImage ); - - free( texImage ); -} - -static void drawCheck( int w, int h, const GLfloat lightCheck[4], - const GLfloat darkCheck[4] ) -{ - float dw = 2.0 / w; - float dh = 2.0 / h; - int i, j; - - for ( i = 0 ; i < w ; i++ ) { - GLfloat x0 = -1.0 + i * dw; - GLfloat x1 = x0 + dw; - - glBegin( GL_QUAD_STRIP ); - - for ( j = 0 ; j <= h ; j++ ) { - GLfloat y = -1.0 + j * dh; - - if ( (i ^ j) & 1 ) { - glColor4fv( lightCheck ); - } else { - glColor4fv( darkCheck ); - } - - glVertex2f( x0, y ); - glVertex2f( x1, y ); - } - - glEnd(); - } -} - -static const char *lookupFormat( GLint format ) -{ - switch ( format ) { - case GL_RGBA: - return "GL_RGBA"; - case GL_RGB: - return "GL_RGB"; - case GL_ALPHA: - return "GL_ALPHA"; - case GL_LUMINANCE: - return "GL_LUMINANCE"; - case GL_LUMINANCE_ALPHA: - return "GL_LUMINANCE_ALPHA"; - case GL_INTENSITY: - return "GL_INTENSITY"; - case GL_COLOR_INDEX: - return "GL_COLOR_INDEX"; - case GL_BGRA: - return "GL_BGRA"; - case GL_BGR: - return "GL_BGR"; - default: - return "unknown format"; - } -} - -static void drawSample( int x, int y, int w, int h, - const struct formatInfo *format, - const struct envModeInfo *envMode ) -{ - glViewport( x, y, w, h ); - glScissor( x, y, w, h ); - - glClearColor( 0.1, 0.1, 0.1, 1.0 ); - glClear( GL_COLOR_BUFFER_BIT ); - - begin2D( w, h ); - drawString( format->name, 10, h - 15, labelInfoColor ); - drawString( envMode->name, 10, 5, labelInfoColor ); - end2D(); - - glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, envMode->mode ); - glTexEnvfv( GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, envColors[envColor] ); - - glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST ); - glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST ); - - glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP ); - glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP ); - - loadTexture( textureWidth, textureHeight, format ); - - if ( drawBackground ) { - drawCheck( 15, 15, lightCheck, darkCheck ); - } - if ( drawBlended ) { - glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA ); - glEnable( GL_BLEND ); - } - if ( drawSmooth ) { - glShadeModel( GL_SMOOTH ); - } - else { - glShadeModel( GL_FLAT ); - glColor4f(1, 1, 1, 1); - } - if ( drawTextured ) { - glEnable( GL_TEXTURE_2D ); - } - - /* - * if (drawSmooth) then draw quad which goes from purple at the - * bottom (100% alpha) to green at the top (50% alpha). - */ - glBegin( GL_QUADS ); - if ( drawSmooth ) glColor4f( 1.0, 0.0, 1.0, 1.0 ); - glTexCoord2f( 0.0, 0.0 ); - glVertex2f( -0.8, -0.8 ); - - if ( drawSmooth ) glColor4f( 1.0, 0.0, 1.0, 1.0 ); - glTexCoord2f( 1.0, 0.0 ); - glVertex2f( 0.8, -0.8 ); - - if ( drawSmooth ) glColor4f( 0.0, 1.0, 0.0, 0.5 ); - glTexCoord2f( 1.0, 1.0 ); - glVertex2f( 0.8, 0.8 ); - - if ( drawSmooth ) glColor4f( 0.0, 1.0, 0.0, 0.5 ); - glTexCoord2f( 0.0, 1.0 ); - glVertex2f( -0.8, 0.8 ); - glEnd(); - - glDisable( GL_BLEND ); - glShadeModel( GL_FLAT ); - glDisable( GL_TEXTURE_2D ); - - if ( envMode->mode == GL_DECAL && - (format->baseFormat == GL_ALPHA || - format->baseFormat == GL_LUMINANCE || - format->baseFormat == GL_LUMINANCE_ALPHA || - format->baseFormat == GL_INTENSITY)) { - /* undefined format/mode combination */ - begin2D( w, h ); - drawStringOutline( "UNDEFINED MODE", 15, h / 2, - labelLevelColor0, labelLevelColor1 ); - end2D(); - } - else if ( displayLevelInfo ) { - GLint width, height, border, format; - GLint redSize, greenSize, blueSize, alphaSize; - GLint luminanceSize, intensitySize; - char buf[255]; - - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &width ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &height ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_BORDER, &border ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &format ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &redSize ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &greenSize ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &blueSize ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alphaSize ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_LUMINANCE_SIZE, &luminanceSize ); - glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTENSITY_SIZE, &intensitySize ); - - begin2D( w, h ); - sprintf( buf, "dimensions: %d x %d", width, height ); - drawStringOutline( buf, 15, h / 2 + 20, labelLevelColor0, labelLevelColor1 ); - - sprintf( buf, "border: %d", border ); - drawStringOutline( buf, 15, h / 2 + 10, labelLevelColor0, labelLevelColor1 ); - - sprintf( buf, "internal format:" ); - drawStringOutline( buf, 15, h / 2, labelLevelColor0, labelLevelColor1 ); - - sprintf( buf, " %s", lookupFormat( format ) ); - drawStringOutline( buf, 15, h / 2 - 10, labelLevelColor0, labelLevelColor1 ); - - sprintf( buf, "sizes:" ); - drawStringOutline( buf, 15, h / 2 - 20, labelLevelColor0, labelLevelColor1 ); - - sprintf( buf, " %d / %d / %d / %d / %d / %d", - redSize, greenSize, blueSize, alphaSize, - luminanceSize, intensitySize ); - drawStringOutline( buf, 15, h / 2 - 30, labelLevelColor0, labelLevelColor1 ); - - end2D(); - } -} - -static void display( void ) -{ - int numX = NUM_ENV_MODES, numY = NUM_BASE_FORMATS; - float xBase = (float) winWidth * 0.01; - float xOffset = (winWidth - xBase) / numX; - float xSize = max( xOffset - xBase, 1 ); - float yBase = (float) winHeight * 0.01; - float yOffset = (winHeight - yBase) / numY; - float ySize = max( yOffset - yBase, 1 ); - float x, y; - int i, j; - - glViewport( 0, 0, winWidth, winHeight ); - glDisable( GL_SCISSOR_TEST ); - glClearColor( 0.0, 0.0, 0.0, 0.0 ); - glClear( GL_COLOR_BUFFER_BIT ); - glEnable( GL_SCISSOR_TEST ); - - x = xBase; - y = (winHeight - 1) - yOffset; - - for ( i = 0 ; i < NUM_BASE_FORMATS ; i++ ) - { - struct formatInfo *format; - - if ( i == baseFormat ) { - labelInfoColor = labelColor1; - } else { - labelInfoColor = labelColor0; - } - - format = &baseFormats[i].format[baseFormats[i].current]; - - for ( j = 0 ; j < NUM_ENV_MODES ; j++ ) { - struct envModeInfo *envMode; - - envMode = &envModes[j]; - drawSample( x, y, xSize, ySize, format, envMode ); - x += xOffset; - } - - x = xBase; - y -= yOffset; - } - - if ( doubleBuffered ) { - glutSwapBuffers(); - } else { - glFlush(); - } - - checkErrors(); -} - -static void usage( char *name ) -{ - fprintf( stderr, "usage: %s [ options ]\n", name ); - fprintf( stderr, "\n" ); - fprintf( stderr, "options:\n" ); - fprintf( stderr, " -sb single buffered\n" ); - fprintf( stderr, " -db double buffered\n" ); - fprintf( stderr, " -info print OpenGL driver info\n" ); -} - -static void instructions( void ) -{ - fprintf( stderr, "texenv - texture environment and internal format test\n" ); - fprintf( stderr, "\n" ); - fprintf( stderr, " [c] - cycle through background colors\n" ); - fprintf( stderr, " [g] - toggle background\n" ); - fprintf( stderr, " [b] - toggle blend\n" ); - fprintf( stderr, " [s] - toggle smooth shading\n" ); - fprintf( stderr, " [t] - toggle texturing\n" ); - fprintf( stderr, " [i] - toggle information display\n" ); - fprintf( stderr, " up/down - select row\n" ); - fprintf( stderr, " left/right - change row's internal format\n" ); -} - -int main( int argc, char *argv[] ) -{ - GLboolean info = GL_FALSE; - int i; - - glutInitWindowSize( winWidth, winHeight ); - glutInit( &argc, argv ); - - for ( i = 1 ; i < argc ; i++ ) { - if ( !strcmp( "-sb", argv[i] ) ) { - doubleBuffered = GL_FALSE; - } else if ( !strcmp( "-db", argv[i] ) ) { - doubleBuffered = GL_TRUE; - } else if ( !strcmp( "-info", argv[i] ) ) { - info = GL_TRUE; - } else { - usage( argv[0] ); - exit( 1 ); - } - } - - if ( doubleBuffered ) { - glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE ); - } else { - glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE ); - } - - Win = glutCreateWindow( "Texture Environment Test" ); - - initialize(); - instructions(); - - if ( info ) { - printf( "\n" ); - printf( "GL_RENDERER = %s\n", (char *) glGetString( GL_RENDERER ) ); - printf( "GL_VERSION = %s\n", (char *) glGetString( GL_VERSION ) ); - printf( "GL_VENDOR = %s\n", (char *) glGetString( GL_VENDOR ) ) ; - printf( "GL_EXTENSIONS = %s\n", (char *) glGetString( GL_EXTENSIONS ) ); - } - -#if GL_EXT_texture_env_add - if ( !glutExtensionSupported( "GL_EXT_texture_env_add" ) ) { - fprintf( stderr, "missing extension: GL_EXT_texture_env_add\n" ); - NUM_ENV_MODES--; - } -#endif - - glutDisplayFunc( display ); - glutReshapeFunc( reshape ); - glutKeyboardFunc( keyboard ); - glutSpecialFunc( special ); - glutMainLoop(); - - return 0; -} |