58 lines
1.1 KiB
Nim
58 lines
1.1 KiB
Nim
import staticglfw, opengl, pixie, times
|
|
|
|
if init() == 0:
|
|
raise newException(Exception, "Failed to Initialize GLFW")
|
|
windowHint(VISIBLE, false.cint)
|
|
var window = createWindow(512, 512, "GLFW3 WINDOW", nil, nil)
|
|
window.makeContextCurrent()
|
|
# This must be called to make any GL function work
|
|
loadExtensions()
|
|
|
|
|
|
let start = epochTime()
|
|
|
|
# Draw red color screen.
|
|
glClearColor(1, 1, 1, 1)
|
|
glClear(GL_COLOR_BUFFER_BIT)
|
|
|
|
glLoadIdentity()
|
|
glTranslatef(-0.25, -0.25, 0)
|
|
glBegin(GL_QUADS)
|
|
glColor3f(1.0, 0.0, 0.0)
|
|
glVertex2f(0.0, 0.0)
|
|
glVertex2f(1.0, 0.0)
|
|
glVertex2f(1.0, 1.0)
|
|
glVertex2f(0.0, 1.0)
|
|
glEnd()
|
|
|
|
glTranslatef(-0.25, -0.25, 0)
|
|
glBegin(GL_QUADS)
|
|
glColor3f(0.0, 0.0, 1.0)
|
|
glVertex2f(0.0, 0.0)
|
|
glVertex2f(1.0, 0.0)
|
|
glVertex2f(1.0, 1.0)
|
|
glVertex2f(0.0, 1.0)
|
|
glEnd()
|
|
|
|
glTranslatef(-0.25, -0.25, 0)
|
|
glBegin(GL_QUADS)
|
|
glColor3f(0.0, 1.0, 0.0)
|
|
glVertex2f(0.0, 0.0)
|
|
glVertex2f(1.0, 0.0)
|
|
glVertex2f(1.0, 1.0)
|
|
glVertex2f(0.0, 1.0)
|
|
glEnd()
|
|
|
|
var screen = newImage(512, 512)
|
|
glReadPixels(
|
|
0, 0,
|
|
512, 512,
|
|
GL_RGBA, GL_UNSIGNED_BYTE,
|
|
screen.data[0].addr
|
|
)
|
|
|
|
echo epochTime() - start
|
|
|
|
|
|
screen.writeFile("screen.png")
|