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panda3d/tests/display/test_fbprops.py
T
git2323 518d4777fa do not prefer framebuffer configs with excessive multisamples (#1456) 
Co-authored-by: user1 <user1@user1.org>
2023-02-12 23:04:46 +00:00

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Python
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from panda3d.core import FrameBufferProperties
def test_fbprops_copy_ctor():
default = FrameBufferProperties.get_default()
fbprops = FrameBufferProperties(default)
assert fbprops == default
def test_fbquality_depth():
# We check common framebuffer depth configurations to make sure they
# are rated predictably with respect to each other when requesting 1 bit.
# In particular, we make sure that we don't get a 16-bit depth buffer if
# the driver only gives extra depth in combination with a stencil buffer.
req = FrameBufferProperties()
req.depth_bits = 1
#NB. we need to set rgb_color=True when testing the quality of framebuffer
# properties, lest it return a quality of 0.
fb_d16s8 = FrameBufferProperties()
fb_d16s8.rgb_color = True
fb_d16s8.depth_bits = 16
fb_d16s8.stencil_bits = 8
fb_d24s8 = FrameBufferProperties()
fb_d24s8.rgb_color = True
fb_d24s8.depth_bits = 24
fb_d24s8.stencil_bits = 8
fb_d32 = FrameBufferProperties()
fb_d32.rgb_color = True
fb_d32.depth_bits = 32
fb_d32s8 = FrameBufferProperties()
fb_d32s8.rgb_color = True
fb_d32s8.depth_bits = 32
fb_d32s8.stencil_bits = 8
# 16-bit depth is terrible for most applications and should not be chosen.
assert fb_d16s8.get_quality(req) < fb_d24s8.get_quality(req)
assert fb_d16s8.get_quality(req) < fb_d32.get_quality(req)
assert fb_d16s8.get_quality(req) < fb_d32s8.get_quality(req)
# Getting extra depth should be better than getting an unwanted bitplane.
assert fb_d32.get_quality(req) > fb_d16s8.get_quality(req)
assert fb_d32.get_quality(req) > fb_d24s8.get_quality(req)
# If we're getting stencil anyway, we'll prefer to maximize our depth.
assert fb_d32s8.get_quality(req) > fb_d24s8.get_quality(req)
# However, unnecessary stencil bits are still a waste.
assert fb_d32s8.get_quality(req) < fb_d32.get_quality(req)
def test_fbquality_rgba64():
# Make sure that we don't get a 64-bit configuration if we request
# an unspecific number of color bits. See:
# https://www.panda3d.org/forums/viewtopic.php?t=20192
# This issue occurs if we are requesting 1 bit, not if we are requesting
# a specific amount. There are several ways to do that, so we want to
# assert that none of them will yield a 64-bit color buffer.
req_color0 = FrameBufferProperties()
req_color0.color_bits = 0
req_color1 = FrameBufferProperties()
req_color1.color_bits = 1
req_color0_alpha0 = FrameBufferProperties()
req_color0_alpha0.color_bits = 0
req_color0_alpha0.alpha_bits = 0
req_color1_alpha1 = FrameBufferProperties()
req_color1_alpha1.color_bits = 1
req_color1_alpha1.alpha_bits = 1
req_rgb0 = FrameBufferProperties()
req_rgb0.set_rgba_bits(0, 0, 0, 0)
req_rgb1 = FrameBufferProperties()
req_rgb1.set_rgba_bits(1, 1, 1, 0)
req_rgb0_alpha0 = FrameBufferProperties()
req_rgb0_alpha0.set_rgba_bits(0, 0, 0, 0)
req_rgb1_alpha1 = FrameBufferProperties()
req_rgb1_alpha1.set_rgba_bits(1, 1, 1, 1)
fb_rgba8 = FrameBufferProperties()
fb_rgba8.rgb_color = True
fb_rgba8.set_rgba_bits(8, 8, 8, 8)
fb_rgba16 = FrameBufferProperties()
fb_rgba16.rgb_color = True
fb_rgba16.set_rgba_bits(16, 16, 16, 16)
assert fb_rgba8.get_quality(req_color0) > fb_rgba16.get_quality(req_color0)
assert fb_rgba8.get_quality(req_color1) > fb_rgba16.get_quality(req_color1)
assert fb_rgba8.get_quality(req_color0_alpha0) > fb_rgba16.get_quality(req_color0_alpha0)
assert fb_rgba8.get_quality(req_color1_alpha1) > fb_rgba16.get_quality(req_color1_alpha1)
assert fb_rgba8.get_quality(req_rgb0) > fb_rgba16.get_quality(req_rgb0)
assert fb_rgba8.get_quality(req_rgb1) > fb_rgba16.get_quality(req_rgb1)
assert fb_rgba8.get_quality(req_rgb0_alpha0) > fb_rgba16.get_quality(req_rgb0_alpha0)
assert fb_rgba8.get_quality(req_rgb1_alpha1) > fb_rgba16.get_quality(req_rgb1_alpha1)
def test_fbquality_multi_samples():
# Make sure that we get appropriate quality levels for different sample requests
fb_0_samples = FrameBufferProperties()
fb_0_samples.set_rgb_color(1)
fb_0_samples.set_multisamples(0)
fb_2_samples = FrameBufferProperties()
fb_2_samples.set_rgb_color(1)
fb_2_samples.set_multisamples(2)
fb_4_samples = FrameBufferProperties()
fb_4_samples.set_rgb_color(1)
fb_4_samples.set_multisamples(4)
fb_8_samples = FrameBufferProperties()
fb_8_samples.set_rgb_color(1)
fb_8_samples.set_multisamples(8)
fb_16_samples = FrameBufferProperties()
fb_16_samples.set_rgb_color(1)
fb_16_samples.set_multisamples(16)
req_0_samples = FrameBufferProperties()
req_0_samples.set_multisamples(0)
req_1_samples = FrameBufferProperties()
req_1_samples.set_multisamples(1)
req_2_samples = FrameBufferProperties()
req_2_samples.set_multisamples(2)
req_4_samples = FrameBufferProperties()
req_4_samples.set_multisamples(4)
req_8_samples = FrameBufferProperties()
req_8_samples.set_multisamples(8)
req_16_samples = FrameBufferProperties()
req_16_samples.set_multisamples(16)
# a fb which does not provide the requested number of samples should always
# have a lower quality than another
assert fb_2_samples.get_quality(req_4_samples) < fb_2_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_4_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_8_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_16_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_16_samples.get_quality(req_16_samples)
assert fb_8_samples.get_quality(req_16_samples) < fb_2_samples.get_quality(req_2_samples)
# a fb which has more than the requested samples should have a
# lower quality than one that matches exactly
assert fb_2_samples.get_quality(req_2_samples) > fb_4_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_8_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_16_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_16_samples.get_quality(req_8_samples)
# the more additional samples the fb provides rather than what is requested,
# the lower the quality should be
assert fb_16_samples.get_quality(req_2_samples) < fb_8_samples.get_quality(req_2_samples)
assert fb_8_samples.get_quality(req_2_samples) < fb_4_samples.get_quality(req_2_samples)
# if the special value of 1 sample is requested, the fb with the highest samples should be
# in favour
assert fb_16_samples.get_quality(req_1_samples) > fb_8_samples.get_quality(req_1_samples)
assert fb_16_samples.get_quality(req_1_samples) > fb_4_samples.get_quality(req_1_samples)
assert fb_16_samples.get_quality(req_1_samples) > fb_2_samples.get_quality(req_1_samples)
assert fb_8_samples.get_quality(req_1_samples) > fb_4_samples.get_quality(req_1_samples)
assert fb_8_samples.get_quality(req_1_samples) > fb_2_samples.get_quality(req_1_samples)
# if 0 samples are requested, the fb with the highest samples should get a reduced quality level
assert fb_16_samples.get_quality(req_0_samples) < fb_8_samples.get_quality(req_0_samples)
assert fb_16_samples.get_quality(req_0_samples) < fb_4_samples.get_quality(req_0_samples)
assert fb_16_samples.get_quality(req_0_samples) < fb_2_samples.get_quality(req_0_samples)
assert fb_8_samples.get_quality(req_0_samples) < fb_4_samples.get_quality(req_0_samples)
assert fb_8_samples.get_quality(req_0_samples) < fb_2_samples.get_quality(req_0_samples)
# if samples are requested we prefer the ones with samples instead of having none
assert fb_0_samples.get_quality(req_2_samples) < fb_2_samples.get_quality(req_4_samples)
assert fb_0_samples.get_quality(req_2_samples) < fb_2_samples.get_quality(req_8_samples)
assert fb_0_samples.get_quality(req_2_samples) < fb_2_samples.get_quality(req_16_samples)
# we prefer buffers without samples if we don't request some
assert fb_0_samples.get_quality(req_0_samples) > fb_2_samples.get_quality(req_0_samples)
assert fb_0_samples.get_quality(req_0_samples) > fb_4_samples.get_quality(req_0_samples)
assert fb_0_samples.get_quality(req_0_samples) > fb_8_samples.get_quality(req_0_samples)
assert fb_0_samples.get_quality(req_0_samples) > fb_16_samples.get_quality(req_0_samples)
def test_fbquality_coverage_samples():
# Make sure that we get appropriate quality levels for different sample requests
fb_2_samples = FrameBufferProperties()
fb_2_samples.set_rgb_color(1)
fb_2_samples.set_coverage_samples(2)
fb_4_samples = FrameBufferProperties()
fb_4_samples.set_rgb_color(1)
fb_4_samples.set_coverage_samples(4)
fb_8_samples = FrameBufferProperties()
fb_8_samples.set_rgb_color(1)
fb_8_samples.set_coverage_samples(8)
fb_16_samples = FrameBufferProperties()
fb_16_samples.set_rgb_color(1)
fb_16_samples.set_coverage_samples(16)
req_0_samples = FrameBufferProperties()
req_0_samples.set_coverage_samples(0)
req_1_samples = FrameBufferProperties()
req_1_samples.set_coverage_samples(1)
req_2_samples = FrameBufferProperties()
req_2_samples.set_coverage_samples(2)
req_4_samples = FrameBufferProperties()
req_4_samples.set_coverage_samples(4)
req_8_samples = FrameBufferProperties()
req_8_samples.set_coverage_samples(8)
req_16_samples = FrameBufferProperties()
req_16_samples.set_coverage_samples(16)
# a fb which does not provide the requested number of samples should always
# have a lower quality than another
assert fb_2_samples.get_quality(req_4_samples) < fb_2_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_4_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_8_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_16_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_4_samples) < fb_16_samples.get_quality(req_16_samples)
assert fb_8_samples.get_quality(req_16_samples) < fb_2_samples.get_quality(req_2_samples)
# a fb which has more than the requested samples should have a
# lower quality than one that matches exactly
assert fb_2_samples.get_quality(req_2_samples) > fb_4_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_8_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_16_samples.get_quality(req_2_samples)
assert fb_2_samples.get_quality(req_2_samples) > fb_16_samples.get_quality(req_8_samples)
# the more additional samples the fb provides rather than what is requested,
# the lower the quality should be
assert fb_16_samples.get_quality(req_2_samples) < fb_8_samples.get_quality(req_2_samples)
assert fb_8_samples.get_quality(req_2_samples) < fb_4_samples.get_quality(req_2_samples)
# if the special value of 1 sample is requested, the fb with the highest samples should be
# in favour
assert fb_16_samples.get_quality(req_1_samples) > fb_8_samples.get_quality(req_1_samples)
assert fb_16_samples.get_quality(req_1_samples) > fb_4_samples.get_quality(req_1_samples)
assert fb_16_samples.get_quality(req_1_samples) > fb_2_samples.get_quality(req_1_samples)
assert fb_8_samples.get_quality(req_1_samples) > fb_4_samples.get_quality(req_1_samples)
assert fb_8_samples.get_quality(req_1_samples) > fb_2_samples.get_quality(req_1_samples)
# if 0 samples are requested, the fb with the highest samples should get a reduced quality level
assert fb_16_samples.get_quality(req_0_samples) < fb_8_samples.get_quality(req_0_samples)
assert fb_16_samples.get_quality(req_0_samples) < fb_4_samples.get_quality(req_0_samples)
assert fb_16_samples.get_quality(req_0_samples) < fb_2_samples.get_quality(req_0_samples)
assert fb_8_samples.get_quality(req_0_samples) < fb_4_samples.get_quality(req_0_samples)
assert fb_8_samples.get_quality(req_0_samples) < fb_2_samples.get_quality(req_0_samples)
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