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我試圖按照紅色書籍 (這是不完整的)的第8章的glDrawPixels例子,但看不到任何東西(我只是看到一個黑色的屏幕 沒有pixmapwhen我運行代碼。任何想法我做錯了嗎?glDrawPixels:看不到程序輸出
#include <GL/glut.h>
#define CHECK_IMAGE_WIDTH 64
#define CHECK_IMAGE_HEIGHT 64
static GLubyte checkImage[CHECK_IMAGE_WIDTH][CHECK_IMAGE_HEIGHT][3];
void makeCheckImage(void) {
int i, j, c;
for (i = 0; i < CHECK_IMAGE_HEIGHT; i++)
for (j = 0; j < CHECK_IMAGE_WIDTH; j++) {
checkImage[i][j][0] = (GLubyte) 255;
checkImage[i][j][1] = (GLubyte) i == j ? 255 : 0;
checkImage[i][j][2] = (GLubyte) 255;
}
}
void init() {
glClearColor(0.0, 0.0, 0.0, 0.0);
glShadeModel(GL_FLAT);
makeCheckImage();
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
}
void display() {
glClear(GL_COLOR_BUFFER_BIT);
glRasterPos2i(0, 0);
glDrawPixels(CHECK_IMAGE_WIDTH, CHECK_IMAGE_HEIGHT, GL_RGB, GL_UNSIGNED_BYTE, checkImage);
glFlush();
}
void reshape(int w, int h) {
gluOrtho2D(-10.0f, 10.0f, -10.0f, 10.0f);
glViewport(0, 0, w, h);
}
int main(int argc, char **argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_RGB);
glutCreateWindow(argv[0]);
glutDisplayFunc(display);
glutReshapeFunc(reshape);
glutMainLoop();
return 0;
}
謝謝,這解決了這一問題。應該注意到這一點的 –
@JohnGoche如果那回答你的qu你可能想[接受它](http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work)。 – Bart