def draw(self, bind_display_shader, fbo, texture):
GL.glDisable(GL.GL_DEPTH_TEST)
GL.glDisable(GL.GL_CULL_FACE)
bind_display_shader()
GL.glBindFramebuffer(GL.GL_FRAMEBUFFER, fbo[0])
GL.glActiveTexture(GL.GL_TEXTURE0)
texture.bind()
GL.glBindVertexArray(self.vertex_array[0])
GL.glDrawArrays(GL.GL_TRIANGLE_FAN, 0, 4)
GL.glBindVertexArray(0)
GL.glBindTexture(GL.GL_TEXTURE_2D, 0)
def __init__(self, bind_display_shader, resolution):
# Generate dummy float image buffer
self.resolution = resolution
width, height = resolution
bind_display_shader()
shader_program = GL.gl_buffer(GL.GL_INT, 1)
GL.glGetIntegerv(GL.GL_CURRENT_PROGRAM, shader_program)
self.vertex_array = GL.gl_buffer(GL.GL_INT, 1)
GL.glGenVertexArrays(1, self.vertex_array)
GL.glBindVertexArray(self.vertex_array[0])
texturecoord_location = GL.glGetAttribLocation(shader_program[0],
"texCoord")
position_location = GL.glGetAttribLocation(shader_program[0], "pos")
GL.glEnableVertexAttribArray(texturecoord_location)
GL.glEnableVertexAttribArray(position_location)
position = [0.0, 0.0, width, 0.0, width, height, 0.0, height]
position = GL.gl_buffer(GL.GL_FLOAT, len(position), position)
texcoord = [0.0, 0.0, 1.0, 0.0, 1.0, 1.0, 0.0, 1.0]
texcoord = GL.gl_buffer(GL.GL_FLOAT, len(texcoord), texcoord)
self.vertex_buffer = GL.gl_buffer(GL.GL_INT, 2)
GL.glGenBuffers(2, self.vertex_buffer)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vertex_buffer[0])
GL.glBufferData(GL.GL_ARRAY_BUFFER, 32, position, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(position_location, 2, GL.GL_FLOAT,
GL.GL_FALSE, 0, None)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vertex_buffer[1])
GL.glBufferData(GL.GL_ARRAY_BUFFER, 32, texcoord, GL.GL_STATIC_DRAW)
GL.glVertexAttribPointer(texturecoord_location, 2, GL.GL_FLOAT,
GL.GL_FALSE, 0, None)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0)
GL.glBindVertexArray(0)