gpu.types.GPUOffscreen crashes Blender #77836

New Issue

Juanfran Matheu · 2020-06-13T17:21:55+02:00

Juanfran Matheu commented

2020-06-13 17:21:55 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Radeon RX 580 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27017

Blender Version
Broken: version: 2.83 release and 2.90
Worked: 2.82 and some previous 2.83

Short description of error
If using gpu.types.GPUOffscreen with samples parameter, it will crash Blender with error:

GPUFrameBuffer: framebuffer status GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE

See docs: https://docs.blender.org/api/blender2.8/gpu.types.html?highlight=gpuoffscreen#gpu.types.GPUOffScreen

Exact steps for others to reproduce the error

Open the .blend in 2.83 release or 2.90 alpha (or copy provided code)
Run the script in Blender
Move cursor over 3d viewport
Blender crashes

FILE
offscreen_crash_blender.blend

CODE (based on an example of the official documentation)

import bgl
import bpy
import gpu
from gpu_extras.presets import draw_texture_2d

WIDTH = 512
HEIGHT = 256
SAMPLES = 4

offscreen = gpu.types.GPUOffScreen(WIDTH, HEIGHT, samples=SAMPLES)


def draw():
    context = bpy.context
    scene = context.scene

    view_matrix = scene.camera.matrix_world.inverted()

    projection_matrix = scene.camera.calc_matrix_camera(
        context.evaluated_depsgraph_get(), x=WIDTH, y=HEIGHT)

    offscreen.draw_view3d(
        scene,
        context.view_layer,
        context.space_data,
        context.region,
        view_matrix,
        projection_matrix)

    bgl.glDisable(bgl.GL_DEPTH_TEST)
    draw_texture_2d(offscreen.color_texture, (10, 10), WIDTH, HEIGHT)


bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_PIXEL')

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: Radeon RX 580 Series ATI Technologies Inc. 4.5.13587 Core Profile Context 20.4.2 26.20.15029.27017 **Blender Version** Broken: version: 2.83 release and 2.90 Worked: 2.82 and some previous 2.83 **Short description of error** If using gpu.types.GPUOffscreen with **samples** parameter, it will crash Blender with error: ``` GPUFrameBuffer: framebuffer status GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE ``` See docs: https://docs.blender.org/api/blender2.8/gpu.types.html?highlight=gpuoffscreen#gpu.types.GPUOffScreen **Exact steps for others to reproduce the error** - Open the .blend in 2.83 release or 2.90 alpha (or copy provided code) - Run the script in Blender - Move cursor over 3d viewport - Blender crashes **FILE** [offscreen_crash_blender.blend](https://archive.blender.org/developer/F8615802/offscreen_crash_blender.blend) **CODE (based on an example of the official documentation)** ``` import bgl import bpy import gpu from gpu_extras.presets import draw_texture_2d WIDTH = 512 HEIGHT = 256 SAMPLES = 4 offscreen = gpu.types.GPUOffScreen(WIDTH, HEIGHT, samples=SAMPLES) def draw(): context = bpy.context scene = context.scene view_matrix = scene.camera.matrix_world.inverted() projection_matrix = scene.camera.calc_matrix_camera( context.evaluated_depsgraph_get(), x=WIDTH, y=HEIGHT) offscreen.draw_view3d( scene, context.view_layer, context.space_data, context.region, view_matrix, projection_matrix) bgl.glDisable(bgl.GL_DEPTH_TEST) draw_texture_2d(offscreen.color_texture, (10, 10), WIDTH, HEIGHT) bpy.types.SpaceView3D.draw_handler_add(draw, (), 'WINDOW', 'POST_PIXEL') ```

Juanfran Matheu commented

2020-06-13 17:21:55 +02:00

Added subscriber: @jfmatheu

Juanfran Matheu changed title from ~~gpy.types.GPUOffscreen crashes Blender~~ to gpu.types.GPUOffscreen crashes Blender

2020-06-13 17:23:34 +02:00

Campbell Barton commented

2020-06-16 09:24:14 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2020-06-16 09:24:14 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Campbell Barton commented

2020-06-16 09:24:14 +02:00

The workbench rendering engine assumes the buffer isn't multi-sample.

While I didn't look into it in detail, it seems like support could be added.

Setting SAMPLES to 0 resolves the issue.

The workbench rendering engine assumes the buffer isn't multi-sample. While I didn't look into it in detail, it seems like support could be added. Setting SAMPLES to 0 resolves the issue.

Clément Foucault commented

2020-07-02 17:07:22 +02:00

Added subscriber: @fclem

Clément Foucault commented

2020-07-02 17:07:22 +02:00

Multisample buffers are not compatible with how we draw things in the DRW manager now.

So I will remove the argument from the python function as well.

Multisample buffers are not compatible with how we draw things in the DRW manager now. So I will remove the argument from the python function as well.

Clément Foucault commented

2020-07-02 17:47:11 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Clément Foucault closed this issue

2020-07-02 17:47:11 +02:00

Clément Foucault self-assigned this 2020-07-02 17:47:11 +02:00

Clément Foucault commented

2020-07-02 17:47:11 +02:00

Fixed by 35481fde40

Fixed by 35481fde40

Sign in to join this conversation.