Source code for picogl.backend.gl.state.param

from dataclasses import dataclass
from enum import Enum
from typing import Callable

from OpenGL.GL import glGetDoublev, glGetFloatv, glGetIntegerv
from OpenGL.raw.GL.ARB.viewport_array import GL_VIEWPORT
from OpenGL.raw.GL.VERSION.GL_1_0 import (
    GL_LINE_WIDTH,
    GL_MAX_TEXTURE_SIZE,
    GL_MODELVIEW_MATRIX,
    GL_PROJECTION_MATRIX,
)
from OpenGL.raw.GL.VERSION.GL_1_3 import GL_ACTIVE_TEXTURE
from OpenGL.raw.GL.VERSION.GL_1_5 import GL_ELEMENT_ARRAY_BUFFER_BINDING
from OpenGL.raw.GL.VERSION.GL_2_0 import GL_CURRENT_PROGRAM
from OpenGL.raw.GL.VERSION.GL_4_5 import GL_TEXTURE_BINDING_2D


@dataclass(frozen=True)

[docs]
class GLParamSpec:
    """Specification for a gl state parameter."""


[docs]
    pname: int


[docs]
    getter: Callable


[docs]
    length: int = 1





[docs]
class GLParam(Enum):
    """Gl Param"""


[docs]
    ACTIVE_TEXTURE = GLParamSpec(
        pname=GL_ACTIVE_TEXTURE,
        getter=glGetIntegerv,
        length=1,
    )


[docs]
    TEXTURE_BINDING_2D = GLParamSpec(
        pname=GL_TEXTURE_BINDING_2D,
        getter=glGetIntegerv,
        length=1,
    )


[docs]
    MAX_TEXTURE_SIZE = GLParamSpec(
        pname=GL_MAX_TEXTURE_SIZE,
        getter=glGetIntegerv,
        length=1,
    )


[docs]
    VIEWPORT = GLParamSpec(
        pname=GL_VIEWPORT,
        getter=glGetIntegerv,
        length=4,
    )


[docs]
    CURRENT_PROGRAM = GLParamSpec(
        pname=GL_CURRENT_PROGRAM,
        getter=glGetIntegerv,
        length=1,
    )


[docs]
    LINE_WIDTH = GLParamSpec(
        pname=GL_LINE_WIDTH,
        getter=glGetFloatv,
        length=1,
    )


[docs]
    ELEMENT_ARRAY_BUFFER_BINDING = GLParamSpec(
        pname=GL_ELEMENT_ARRAY_BUFFER_BINDING,
        getter=glGetIntegerv,
        length=1,
    )


[docs]
    MODELVIEW_MATRIX = GLParamSpec(
        pname=GL_MODELVIEW_MATRIX,
        getter=glGetDoublev,
        length=16,
    )


[docs]
    PROJECTION_MATRIX = GLParamSpec(
        pname=GL_PROJECTION_MATRIX,
        getter=glGetDoublev,
        length=16,
    )