forked from KolibriOS/kolibrios
114 lines
2.3 KiB
C
114 lines
2.3 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <math.h>
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#define EGL_EGLEXT_PROTOTYPES
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#include "EGL/egl.h"
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#include "EGL/eglext.h"
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#include "GL/gl.h"
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#include "gbm.h"
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#include <kos32sys.h>
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#include "eglut.h"
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GLint list;
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static void init(void)
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{
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// fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
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// fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
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// fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
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// fflush(stderr);
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list = glGenLists(1);
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glNewList(list, GL_COMPILE);
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/* XXX: this state-change will only be executed if list is called
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* from outside a begin/end pair:
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*/
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glShadeModel( GL_FLAT );
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glBegin(GL_TRIANGLES);
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glColor3f(0,0,0.7);
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glVertex3f( -0.9, 0.9, -30.0);
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glColor3f(0,0.9,0);
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glVertex3f( -0.9, -0.9, -30.0);
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glColor3f(0.8,0,0);
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glVertex3f( 0.9, 0.0, -30.0);
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glEnd();
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glEndList();
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}
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static void
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idle(void)
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{
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eglutPostRedisplay();
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}
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static void reshape(int width, int height)
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{
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asm volatile ("int3");
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/*
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glViewport(0, 0, (GLint)width, (GLint)height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 100.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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*/
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glViewport(0, 0, (GLint) width, (GLint) height);
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GLfloat h = (GLfloat) height / (GLfloat) width;
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustum(-1.0, 1.0, -h, h, 5.0, 60.0);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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static void draw(void)
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{
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asm volatile ("int3");
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glClear(GL_COLOR_BUFFER_BIT);
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glShadeModel( GL_SMOOTH );
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glBegin(GL_TRIANGLES);
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/* Note: call the list from inside a begin/end pair. The end is
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* provided by the display list...
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*/
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glCallList(list);
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// glFlush();
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}
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int
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main(int argc, char *argv[])
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{
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eglutInitWindowSize(384, 384);
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eglutInitAPIMask(EGLUT_OPENGL_BIT);
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eglutInit(argc, argv);
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eglutCreateWindow("gl-render");
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eglutIdleFunc(idle);
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eglutReshapeFunc(reshape);
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eglutDisplayFunc(draw);
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glClearColor( 0, 0, 0, 1.0);
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init();
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glDrawBuffer(GL_BACK);
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eglutMainLoop();
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return 0;
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}
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