| /* |
| THIS WORK, INCLUDING THE SOURCE CODE, DOCUMENTATION |
| AND RELATED MEDIA AND DATA, IS PLACED INTO THE PUBLIC DOMAIN. |
| |
| THE ORIGINAL AUTHOR IS KYLE FOLEY. |
| |
| THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY |
| OF ANY KIND, NOT EVEN THE IMPLIED WARRANTY OF |
| MERCHANTABILITY. THE AUTHOR OF THIS SOFTWARE, |
| ASSUMES _NO_ RESPONSIBILITY FOR ANY CONSEQUENCE |
| RESULTING FROM THE USE, MODIFICATION, OR |
| REDISTRIBUTION OF THIS SOFTWARE. |
| */ |
| |
| #ifndef __EMSCRIPTEN__ |
| #define USE_GLEW 1 |
| #endif |
| |
| #if USE_GLEW |
| #include "GL/glew.h" |
| #endif |
| |
| #include "SDL/SDL.h" |
| #if !USE_GLEW |
| #include "SDL/SDL_opengl.h" |
| #endif |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <assert.h> |
| |
| int main(int argc, char *argv[]) |
| { |
| SDL_Surface *screen; |
| if ( SDL_Init(SDL_INIT_VIDEO) != 0 ) { |
| printf("Unable to initialize SDL: %s\n", SDL_GetError()); |
| return 1; |
| } |
| |
| SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 ); |
| screen = SDL_SetVideoMode( 640, 480, 24, SDL_OPENGL ); |
| if ( !screen ) { |
| printf("Unable to set video mode: %s\n", SDL_GetError()); |
| return 1; |
| } |
| |
| GLint value = 0; |
| glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_BLEND); |
| glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &value); |
| assert(value == GL_BLEND); |
| glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); |
| glGetTexEnviv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, &value); |
| assert(value == GL_MODULATE); |
| |
| GLfloat colora[4] = { 0.2f, 0.3f, 0.4f, 0.5f }; |
| GLfloat colorb[4] = {}; |
| glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, colora); |
| glGetTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_COLOR, colorb); |
| printf("%f %f %f %f\n", colorb[0], colorb[1], colorb[2], colorb[3]); |
| assert(colora[0] == colorb[0]); |
| assert(colora[1] == colorb[1]); |
| assert(colora[2] == colorb[2]); |
| assert(colora[3] == colorb[3]); |
| SDL_Quit(); |
| |
| #ifdef REPORT_RESULT |
| int result = 1; |
| REPORT_RESULT(); |
| #endif |
| return 0; |
| } |