如何在pygame中将列表绘制到屏幕上？

Question

I'm writing a program that calculates some pixel stuff in an OpenGL shader. With that calculation, I get a list containing every pixel that needs to be written to the screen. Is there a way I can draw all of this data at once rather than iterating through the list and drawing every pixel? I ask this because it would be extremely slow to iterate through the list that contains all the million pixels for my screen and individually write these pixels to the screen. Any help would be much appreciated. Thanks.

Answer 1

See How to save pygame scene as jpeg?

If the color data is in the framebuffer you can read it with glReadPixels before the display is updated (before pygame.display.flip() or pygame.display.update() ). Use pygame.image.fromstring() to create new Surfaces from the buffer:

size = screen.get_size()
buffer = glReadPixels(0, 0, *size, GL_RGBA, GL_UNSIGNED_BYTE)
pygame.display.flip()
screen_surf = pygame.image.fromstring(buffer, size, "RGBA")

If the data is in a texture (eg stored in a compute shader) you can read it with glGetTexImage :

image_buffer = glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_BYTE)
image_surf = pygame.image.fromstring(image_buffer, (width, height), "RGBA")