+++ /dev/null
-
-/* 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- * Unpublished-- rights reserved under the copyright laws of the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;
-}
projects / mesa.git / blobdiff