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|
import struct
from array import array
import pytest
import moderngl
@pytest.fixture(scope='module', autouse=True)
def vao(ctx_static):
prog = ctx_static.program(
vertex_shader='''
#version 330
in vec2 vert;
out vec2 text;
void main() {
gl_Position = vec4(vert * 2.0 - 1.0, 0.0, 1.0);
text = vert;
}
''',
fragment_shader='''
#version 330
uniform sampler2D Texture;
in vec2 text;
out vec4 color;
void main() {
color = texture(Texture, text);
}
''',
)
vbo = ctx_static.buffer(struct.pack('8f', 0, 0, 0, 1, 1, 0, 1, 1))
return ctx_static.simple_vertex_array(prog, vbo, 'vert')
def test_texture_properties(ctx):
tex = ctx.texture((16, 16), 4)
assert tex.width == 16
assert tex.height == 16
assert tex.size == (16, 16)
assert tex.components == 4
assert tex.depth is False
assert tex.samples == 0
assert tex.glo > 0
assert tex.filter == (moderngl.LINEAR, moderngl.LINEAR)
assert tex.repeat_x is True
assert tex.repeat_y is True
assert tex.dtype == 'f1'
assert tex.anisotropy == 0.0
tex.label = "wonderful texture"
assert tex.label == "wonderful texture"
tex.anisotropy = ctx.max_anisotropy
assert tex.anisotropy == ctx.max_anisotropy
tex.build_mipmaps()
assert tex.filter == (moderngl.LINEAR_MIPMAP_LINEAR, moderngl.LINEAR)
def test_1(ctx, vao):
assert vao.mode == moderngl.TRIANGLES
fbo = ctx.framebuffer(ctx.renderbuffer((16, 16)))
pixels = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 0, 0, 255, 255, 0, 0, 0, 255)
texture = ctx.texture((2, 2), 4, pixels)
fbo.use()
texture.use()
texture.filter = (moderngl.LINEAR, moderngl.LINEAR)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((8, 8, 1, 1)))
assert (abs(r - 49) < 8 and abs(g - 63) < 8 and abs(b - 63) < 8)
texture.filter = (moderngl.NEAREST, moderngl.NEAREST)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((6, 6, 1, 1)))
assert (abs(r - 255) < 8 and abs(g - 0) < 8 and abs(b - 0) < 8)
r, g, b = struct.unpack('3B', fbo.read((9, 6, 1, 1)))
assert (abs(r - 0) < 8 and abs(g - 255) < 8 and abs(b - 0) < 8)
r, g, b = struct.unpack('3B', fbo.read((6, 9, 1, 1)))
assert (abs(r - 0) < 8 and abs(g - 0) < 8 and abs(b - 255) < 8)
r, g, b = struct.unpack('3B', fbo.read((9, 9, 1, 1)))
assert (abs(r - 0) < 8 and abs(g - 0) < 8 and abs(b - 0) < 8)
def test_2(ctx, vao):
fbo = ctx.framebuffer(ctx.renderbuffer((16, 16)))
pixels1 = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
pixels2 = struct.pack('16B', 20, 30, 40, 255, 80, 70, 60, 255, 20, 30, 40, 255, 80, 70, 60, 255)
texture = ctx.texture((2, 2), 4, pixels1)
fbo.use()
texture.use()
texture.filter = (moderngl.NEAREST, moderngl.NEAREST)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((5, 7, 1, 1)))
assert (abs(r - 255) < 8 and abs(g - 0) < 8 and abs(b - 0) < 8)
r, g, b = struct.unpack('3B', fbo.read((10, 7, 1, 1)))
assert (abs(r - 0) < 8 and abs(g - 255) < 8 and abs(b - 0) < 8)
texture.write(pixels2)
texture.filter = (moderngl.NEAREST, moderngl.NEAREST)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((5, 7, 1, 1)))
assert (abs(r - 20) < 8 and abs(g - 30) < 8 and abs(b - 40) < 8)
r, g, b = struct.unpack('3B', fbo.read((10, 7, 1, 1)))
assert (abs(r - 80) < 8 and abs(g - 70) < 8 and abs(b - 60) < 8)
def test_3(ctx, vao):
fbo = ctx.framebuffer(ctx.renderbuffer((16, 16)))
pixels1 = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
pixels2 = struct.pack('16B', 20, 30, 40, 255, 80, 70, 60, 255, 20, 30, 40, 255, 80, 70, 60, 255)
texture = ctx.texture((2, 2), 4)
pbo1 = ctx.buffer(pixels1)
pbo2 = ctx.buffer(pixels2)
fbo.use()
texture.use()
texture.write(pbo1)
texture.filter = (moderngl.NEAREST, moderngl.NEAREST)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((5, 7, 1, 1)))
assert (abs(r - 255) < 8 and abs(g - 0) < 8 and abs(b - 0) < 8)
r, g, b = struct.unpack('3B', fbo.read((10, 7, 1, 1)))
assert (abs(r - 0) < 8 and abs(g - 255) < 8 and abs(b - 0) < 8)
texture.write(pbo2)
texture.filter = (moderngl.NEAREST, moderngl.NEAREST)
vao.render(moderngl.TRIANGLE_STRIP)
r, g, b = struct.unpack('3B', fbo.read((5, 7, 1, 1)))
assert (abs(r - 20) < 8 and abs(g - 30) < 8 and abs(b - 40) < 8)
r, g, b = struct.unpack('3B', fbo.read((10, 7, 1, 1)))
assert (abs(r - 80) < 8 and abs(g - 70) < 8 and abs(b - 60) < 8)
def test_4(ctx):
pixels = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
texture = ctx.texture((2, 2), 4, pixels)
assert texture.read() == pixels
def test_5(ctx):
pixels = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
texture = ctx.texture((2, 2), 4, pixels)
buf = bytearray(len(pixels))
texture.read_into(buf)
assert bytes(buf) == pixels
def test_6(ctx):
pixels = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
texture = ctx.texture((2, 2), 4, pixels)
pbo = ctx.buffer(reserve=len(pixels))
texture.read_into(pbo)
assert pbo.read() == pixels
def test_override_internalformat(ctx):
"""Ensure no errors occur when overriding internalformat"""
if "GL_EXT_texture_sRGB" not in ctx.extensions:
pytest.skip('GL_EXT_texture_sRGB extension not supported')
GL_SRGB8 = 0x8C41
pixels = struct.pack('16B', 255, 0, 0, 255, 0, 255, 0, 255, 255, 0, 0, 255, 0, 255, 0, 255)
texture = ctx.texture((2, 2), 4, pixels, internal_format=GL_SRGB8)
_ = texture.read()
assert ctx.error == "GL_NO_ERROR"
def test_normalized_textures(ctx, vao):
"""8 and 16 bit normalized integer textures"""
ni1 = ctx.texture((4, 4), 4, dtype="ni1")
ni2 = ctx.texture((4, 4), 4, dtype="ni2")
nu1 = ctx.texture((4, 4), 4, dtype="nu1")
nu2 = ctx.texture((4, 4), 4, dtype="nu2")
nu1_data = array('B', [255] * 16 * 4).tobytes()
nu2_data = array('H', [65535] * 16 * 4).tobytes()
ni1_data = array('b', [127] * 16 * 4).tobytes()
ni2_data = array('h', [32767] * 16 * 4).tobytes()
nu1.write(nu1_data)
nu2.write(nu2_data)
ni1.write(ni1_data)
ni2.write(ni2_data)
assert nu1.read() == nu1_data
assert nu2.read() == nu2_data
assert ni1.read() == ni1_data
assert ni2.read() == ni2_data
fbo = ctx.simple_framebuffer((4, 4))
fbo.use()
# Render these textures to an RGBA8 framebuffer and ensure the result is a pure white color (FF)
fbo.clear()
nu1.use()
vao.render()
assert fbo.read(viewport=(0, 0, 1, 1), components=4, dtype="f1") == b'\xff\xff\xff\xff'
fbo.clear()
nu2.use()
vao.render()
assert fbo.read(viewport=(0, 0, 1, 1), components=4, dtype="f1") == b'\xff\xff\xff\xff'
fbo.clear()
ni1.use()
vao.render()
assert fbo.read(viewport=(0, 0, 1, 1), components=4, dtype="f1") == b'\xff\xff\xff\xff'
fbo.clear()
ni2.use()
vao.render()
assert fbo.read(viewport=(0, 0, 1, 1), components=4, dtype="f1") == b'\xff\xff\xff\xff'
def test_depth_texture_write(ctx):
"""Write data into depth texture"""
size = 4, 4
fbo = ctx.framebuffer(
color_attachments=[ctx.texture(size, 4)],
depth_attachment=ctx.depth_texture(size),
)
fbo.clear(depth=1.0)
first = struct.unpack("16f", fbo.depth_attachment.read())
second = (1.0,) * 16
for a, b in zip(first, second):
assert pytest.approx(a, abs=1.0e-6) == b
fbo.depth_attachment.write(struct.pack("16f", *([0.5] * 16)))
first = struct.unpack("16f", fbo.depth_attachment.read())
second = (0.5,) * 16
for a, b in zip(first, second):
assert pytest.approx(a, abs=1.0e-6) == b
|
