Drawing more than 50 images to a scene

[claydugo]

I am attempting to draw more than 50 images to a panel but I seem to be hitting some sort of limit.

For testing I am using 1x1 pixel images so it seems to be a texture limit and not data related.

If I increase DVZ_MAX_FIFO_CAPACITY I can get 64 images to draw and then it begins to crash again.

Is there a better way to display many images to a scene?

Below is the script I am using to test.

import numpy as np
from datoviz import canvas, run


def tile_image(panel, image_shape, index, texture):
    visual = panel.visual('image', transform='init')
    visual.data('pos', np.array([[
        image_shape[1] * (index[1] + 1),
        image_shape[0] * (index[0] + 0),
        0,
    ]]), idx=0)  # noqa
    visual.data('pos', np.array([[
        image_shape[1] * (index[1] + 1),
        image_shape[0] * (index[0] + 1),
        0,
    ]]), idx=1)  # noqa
    visual.data('pos', np.array([[
        image_shape[1] * (index[1] + 0),
        image_shape[0] * (index[0] + 1),
        0,
    ]]), idx=2)  # noqa
    visual.data('pos', np.array([[
        image_shape[1] * (index[1] + 0),
        image_shape[0] * (index[0] + 0),
        0,
    ]]), idx=3)  # noqa

    visual.data('texcoords', np.atleast_2d([
        1,
        0,
    ]), idx=0)
    visual.data('texcoords', np.atleast_2d([
        1,
        1,
    ]), idx=1)
    visual.data('texcoords', np.atleast_2d([
        0,
        1,
    ]), idx=2)
    visual.data('texcoords', np.atleast_2d([
        0,
        0,
    ]), idx=3)

    visual.texture(texture)


def add_image(image):
    tex = ctx.texture(image.shape[0], image.shape[1])
    tex.set_filter('linear')
    tex.upload(image)
    return tex


c = canvas(show_fps=True)
panel = c.scene().panel(controller='panzoom')
ctx = c.gpu().context()

shape = (7, 7)

for i in np.ndindex(shape):
    img = np.dstack((
        np.random.randint(0, 256, (1, 1, 4), dtype=np.uint8),
        255 * np.ones((1, 1), dtype=np.uint8)
    ))
    texture = add_image(img)
    tile_image(panel, img.shape[:2], i, texture)

run()

Thank you for taking the time to look at this

[claydugo]

@hmaarrfk

[hmaarrfk]

Some insights, I tried printing minDepth and maxDepth and it seems that there is a buffer overflow error that is overwriting them:

with shape = (8, 9)

minDepth 0.000000
maxDepth 1.000000
minDepth 0.000000
maxDepth 1.000000
minDepth 0.000000
maxDepth 1.000000
minDepth 5707453190635520.000000
maxDepth 0.000000
python: /home/mark/git/datoviz/src/scene_utils.h:247: _update_visual_viewport: Assertion `(visual->viewport.viewport.minDepth < visual->viewport.viewport.maxDepth)' failed.