54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
import os
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dir_path = os.path.dirname(os.path.realpath(__file__))
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import OpenGL.GL as gl
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import OpenGL.GL.shaders as sh
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default_vertex_path = dir_path + '/../assets/shaders/shader.vert'
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default_fragment_path = dir_path + '/../assets/shaders/shader.frag'
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class Shader:
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"""Shader
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Loads, compile and binds the shader that are in the assets/shaders
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directory
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"""
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def __init__(self, vertex_path = default_vertex_path, fragment_path = default_fragment_path):
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"""Creates a shader object, and compile it
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:param vertex_path: path to the vertex shader
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:param fragment_path: path to the fragment shader
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"""
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with open(vertex_path) as f:
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self.vertex_src = f.read()
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with open(fragment_path) as f:
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self.fragment_src = f.read()
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self.compile_shaders()
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self.compile_program()
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def compile_shaders(self):
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""" Compiles the shader
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"""
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self.vertex_shader = sh.compileShader(self.vertex_src, gl.GL_VERTEX_SHADER)
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self.fragment_shader = sh.compileShader(self.fragment_src, gl.GL_FRAGMENT_SHADER)
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def compile_program(self):
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"""Compile the shader program
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The shaders must be compiled
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"""
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self.program = sh.compileProgram(self.vertex_shader, self.fragment_shader)
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def bind(self):
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"""Bind the current shader to the OpenGL context
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"""
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gl.glUseProgram(self.program)
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def unbind(self):
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"""Reset OpenGL shader to 0
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"""
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gl.glUseProgram(0)
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