On 10/11/08, Noyan Tokgozoglu <[EMAIL PROTECTED]> wrote:
>
> Is it possible to save a screenshot of the active window somehow? I'm
> using opengl primitives, but when I try to do something like
> CopyTexImage2D then call textureçsaveö ı get a weird, skewed image.
> Can anyone help me?
>
> The drawing method is as follows:
>
> def draw():
> global std
> global win
> win.switch_to()
> global tex
> glClear(GL_COLOR_BUFFER_BIT)
> global image
> glEnable(GL_TEXTURE_2D)
> glBindTexture(GL_TEXTURE_2D,tex.id)
> #colorBits = GLchar()
> #glTexImage2D(GL_TEXTURE_2D,0 ,3 , 640, 480, 0 , GL_RGB,
> GL_UNSIGNED_BYTE, colorBits)
> glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,
> GL_LINEAR)
> glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,
> GL_LINEAR)
> glViewport(0,0,640,480)
>
> if image:
> glBindTexture(GL_TEXTURE_2D,image.id)
> #tex.blit_into(image,0,0,0)
> glBindTexture(GL_TEXTURE_2D,0)
>
> for item in std:
> if item[0] == 'line':
> glLineWidth(item[5])
> glColor3f(item[6][0],item[6][1],item[6][2])
> pyglet.graphics.draw(2, pyglet.gl.GL_LINES,('v2i',
> (item[1], item[2], item[3], item[4])))
> elif item[0] == 'brush':
> glPointSize( item[3] )
> glColor3f(item[4][0],item[4][1],item[4][2])
> pyglet.graphics.draw(1, pyglet.gl.GL_POINTS,('v2i',
> (item[1], item[2])))
> global drag
> if drag:
> global begpt
> global endpt
> global color
> global ptsize
> glColor3f(color[0],color[1],color[2])
> glLineWidth(ptsize)
> pyglet.graphics.draw(2, pyglet.gl.GL_LINES,('v2i',
> (begpt[0], begpt[1], endpt[0], endpt[1])))
>
> glBindTexture(GL_TEXTURE_2D,tex.id)
> glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,0,0, 640, 480, 0)
> glFinish()
> glViewport(0,0,640,480)
> glDisable(GL_TEXTURE_2D)
> glFlush()
>
> and I call tex.save() when the user presses a key.
I'd need to see more to give a better answer; but I would guess the
"tex" texture was created (or loaded) in pyglet as RGB, yet you're
recreating it as RGBA with CopyTexImage2D -- this would give the
skewed appearance you describe due to the mismatch in components.
Alex.
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