Big Bang

1 files changed, 53 insertions, 0 deletions

diff --git a/src/display.c b/src/display.c
new file mode 100644
index 0000000..33131ef
--- /dev/null
+++ b/src/display.c
@@ -0,0 +1,53 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <GL/glut.h>
+#include "display.h"
+#include "typedef.h"
+
+unsigned char WIDTH  = 1;
+unsigned char HEIGHT = 1;
+
+GLubyte pixels[BUF_CAP] = {0};
+static int fd;
+
+void pixel(int x, int y, char *buf)
+{
+    int p = (y*WIDTH + x)*3;
+    int b = ((HEIGHT-1-y)*WIDTH+x)*3;
+    pixels[p+0] = buf[b+0];
+    pixels[p+1] = buf[b+1];
+    pixels[p+2] = buf[b+2];
+}
+
+void render()
+{
+    read(fd, &WIDTH,  sizeof(WIDTH));
+    read(fd, &HEIGHT, sizeof(HEIGHT));
+
+    char buf[BUF_CAP] = {0};
+    if(read(fd, buf, sizeof(buf)) != -1)
+        for(int i = 0; i < HEIGHT; i++)
+            for(int j = 0; j < WIDTH; j++)
+                pixel(j, i, buf);
+
+    glClear(GL_COLOR_BUFFER_BIT);
+    glDrawPixels(WIDTH, HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, pixels);
+
+    glutSwapBuffers();
+    glutReshapeWindow(WIDTH, HEIGHT);
+    glutPostRedisplay();
+}
+
+void display(int *argc, char **argv, int readfd)
+{
+	glutInit(argc, argv);
+	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
+	glutInitWindowSize(69, 69);
+	glutCreateWindow(argv[0]);
+
+    fd = readfd;
+
+	glutDisplayFunc(render);
+	glutMainLoop();
+}