def __init__(self,
width,
height,
window,
num_color_attachments=1,
mapping_mode=None,
provide_depth=False,
provide_stencil=False):
""""Create an arbitrary layer framebuffer, I'll add stencil and depthbuffers if I ever package this for resuse, in pyweek, those args are pretty much placeholders"""
if mapping_mode is None:
mapping_mode = gl.GL_NEAREST
assert not provide_stencil, 'stencil buffer not implemented'
assert not provide_depth, 'depth buffer not implemented'
self.window = window
self.width = width
self.height = height
self.bufferId = gl.GLuint(0)
self.textureIds = []
self.buffer_args = []
#create the vram objects?
gl.glGenFramebuffers(1, rf(self.bufferId))
gl.glBindFramebuffer(gl.GL_FRAMEBUFFER, self.bufferId)
for bufferIndex in range(num_color_attachments):
newTex = gl.GLuint(0)
gl.glGenTextures(1, rf(newTex))
self.textureIds.append(newTex)
gl.glBindTexture(gl.GL_TEXTURE_2D, newTex)
gl.glTexImage2D(gl.GL_TEXTURE_2D, 0, gl.GL_RGB, width, height, 0,
gl.GL_RGB, gl.GL_UNSIGNED_INT, 0)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MAG_FILTER,
mapping_mode)
gl.glTexParameteri(gl.GL_TEXTURE_2D, gl.GL_TEXTURE_MIN_FILTER,
mapping_mode)
gl.glFramebufferTexture2D(gl.GL_FRAMEBUFFER,
gl.GL_COLOR_ATTACHMENT0 + bufferIndex,
gl.GL_TEXTURE_2D, newTex, 0)
self.buffer_args.append(gl.GL_COLOR_ATTACHMENT0 + bufferIndex)
#assign one of the vram objects to the framebuffer cache?
if provide_depth:
self.buffer_args.append(gl.GL_DEPTH_ATTACHMENT)
if provide_stencil:
self.buffer_args.append(gl.GL_STENCIL_ATTACHMENT)
self.buffers_provided = (gl.GLenum *
len(self.buffer_args))(*self.buffer_args)
gl.glDrawBuffers(len(self.buffer_args), self.buffers_provided)
self.textures = [
Texture(self.width, self.height, gl.GL_TEXTURE_2D, texId.value)
for texId in self.textureIds
]
assert gl.glCheckFramebufferStatus(
gl.GL_FRAMEBUFFER
) == gl.GL_FRAMEBUFFER_COMPLETE, "I don't know why this happened, but at least I can find out"
def __init__(self, width, height):
if not gl.gl_info.have_extension('GL_EXT_framebuffer_object'):
raise Exception('framebuffer object extension not available')
texture_id = buffer_texture(width, height)
self.texture = Texture(width, height, gl.GL_TEXTURE_2D, texture_id)
framebuffer_id = gl.GLuint()
gl.glGenFramebuffersEXT(1, byref(framebuffer_id))
self.id = framebuffer_id.value
with self:
gl.glFramebufferTexture2DEXT(gl.GL_FRAMEBUFFER_EXT,
gl.GL_COLOR_ATTACHMENT0_EXT + 0,
gl.GL_TEXTURE_2D, texture_id, 0)
def create_background(self, dim, ix, iy):
# draw dirt stuff
freq = 1 / 100
imgdata = self.perlin.noise2_bytes(ix, iy, freq, 2, dim, 64)
target = GL_TEXTURE_2D
gid = GLuint()
glGenTextures(1, byref(gid))
glBindTexture(target, gid.value)
glTexParameteri(target, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
glTexParameteri(target, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
glTexImage2D(target, 0, GL_RGBA, dim, dim, 0, GL_RGBA,
GL_UNSIGNED_BYTE, imgdata)
image = Texture(dim, dim, target, gid.value)
key = 'bg_%d_%d' % (ix, iy)
self[key] = image
return key
