On 18 Mar, 17:48, Miki <[EMAIL PROTECTED]> wrote:
> Apart from PIL, some other options are:
> 1. Most GUI frameworks (wxPython, PyQT, ...) give you a canvas object
> you can draw on
Yes, but at least on Windows you will get a GDI canvas. GDI is slow.
> 2. A bit of an overkill, but you can use PyOpenGL
OpenGL gives you a fast 'bitblit' for drawing bitmaps to the fram
buffer (much faster than GDI). Here is some C code that does that (8-
bit color depth). Translating to Python is trivial. I prefer not to
use PyOpenGL as it has some unwanted overhead. It is better to use
ctypes.
void bitblt(void *frame, int w, int h)
{
glViewport(0,0,w,h);
glClearColor(0.0, 0.0, 0.0, 0.0);
glClear(GL_COLOR_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluOrtho2D(0.0, (GLfloat)w, 0.0, (GLfloat)h);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glRasterPos2i(0,0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glDrawPixels(w, h, GL_RGB, GL_UNSIGNED_BYTE_3_3_2, (GLvoid *)frame);
glFlush();
}
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