Re: [pygame] blit speedup

To: pygame-users <pygame-users@xxxxxxxx>

Subject: Re: [pygame] blit speedup

From: Ian Mallett <geometrian@xxxxxxxxx>

Date: Sun, 28 Mar 2010 20:24:28 -0700

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Do you have any recommendation for the best way to get an OpenGL engine running, especially going Pygame surface to OpenGL texture? I'd like to preserve platform-independent .py files or executables if possible.

Google is your friend:

textureSurface = pygame.image.load(path)

textureData = pygame.image.tostring(textureSurface,"RGB",1)

width = textureSurface.get_width()
height = textureSurface.get_height()

 
texture = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, texture)

glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, width, height, 0, GL_RGB, GL_UNSIGNED_BYTE, textureData)

glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)


This is quite cross-compatible.

I had previously coded a simple engine with OpenGL/C++, and trying to get textures from LibPNG or the like proved to be a headache even on different machines, let alone a separate OS.

There are quite a few code samples (and complete OpenGL libraries (including mine)) on pygame.org. As far as I know, most are cross-compatible.
Ian