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