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Crash or error when exporting big Layout Uvs #110524

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opened 2023-07-27 10:17:07 +02:00 by DeoFaustino · 23 comments
DeoFaustino commented 2023-07-27 10:17:07 +02:00
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System Information
Operating system: Windows-10-10.0.19044-SP0 64 Bits
Intel(R) Xeon(R) W-2225 CPU @ 4.10GHz 4.10 GHz
64GB RAM
Graphics card: NVIDIA RTX A4000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.67

Blender Version
Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: rB55485cb379f7
Worked: (newest version of Blender that worked as expected)

I either get this error:

Python: Traceback (most recent call last):
File "C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout_init_.py", line 137, in execute
export(filepath, polygon_data, different_colors, self.size[0], self.size[1], self.opacity)
File "C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 20, in export
pixel_data.dimensions = width * height * 4
AttributeError: dimension must be greater than or equal to 1

or blender just crashes.

What I am doing.
I work with dpi of 1270 (Laser machining) so the textures are big.
on this case, 40 000 x 20 000px.

even if I set the maximum of the export to the max preset (32 768 x 16384) it will crash.

Please provide feedback

**System Information** Operating system: Windows-10-10.0.19044-SP0 64 Bits Intel(R) Xeon(R) W-2225 CPU @ 4.10GHz 4.10 GHz 64GB RAM Graphics card: NVIDIA RTX A4000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 536.67 **Blender Version** Broken: version: 3.4.1, branch: blender-v3.4-release, commit date: 2022-12-19 17:00, hash: `rB55485cb379f7` Worked: (newest version of Blender that worked as expected) I either get this error: Python: Traceback (most recent call last): File "C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout\__init__.py", line 137, in execute export(filepath, polygon_data, different_colors, self.size[0], self.size[1], self.opacity) File "C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 20, in export pixel_data.dimensions = width * height * 4 AttributeError: dimension must be greater than or equal to 1 or blender just crashes. What I am doing. I work with dpi of 1270 (Laser machining) so the textures are big. on this case, 40 000 x 20 000px. even if I set the maximum of the export to the max preset (32 768 x 16384) it will crash. Please provide feedback
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YimingWu commented 2023-07-27 10:50:28 +02:00
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40000 x 20000 x 4 and 32768 x 16384 x 4 both exceed 32 bits, depending on the implementation, the image/file writer may or may not support that size.

Could you share the crash log of calling export UV on 32768 x 16384 size? Thanks!

`40000 x 20000 x 4` and `32768 x 16384 x 4` both exceed 32 bits, depending on the implementation, the image/file writer may or may not support that size. Could you share the [crash log](https://docs.blender.org/manual/en/latest/troubleshooting/crash.html#windows) of calling export UV on 32768 x 16384 size? Thanks!
DeoFaustino commented 2023-07-27 11:46:13 +02:00
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40000 x 20000 x 4 and 32768 x 16384 x 4 both exceed 32 bits, depending on the implementation, the image/file writer may or may not support that size.

Could you share the crash log of calling export UV on 32768 x 16384 size? Thanks!

Sorry, what do you mean with x4 on your maths? just so I understand

> `40000 x 20000 x 4` and `32768 x 16384 x 4` both exceed 32 bits, depending on the implementation, the image/file writer may or may not support that size. > > Could you share the [crash log](https://docs.blender.org/manual/en/latest/troubleshooting/crash.html#windows) of calling export UV on 32768 x 16384 size? Thanks! Sorry, what do you mean with x4 on your maths? just so I understand
YimingWu commented 2023-07-27 11:55:34 +02:00
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hi, the x4 is for RGBA 4 channels. It's also evidenent in the error log C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 20, in export pixel_data.dimensions = width * height * 4 AttributeError:

hi, the `x4` is for `RGBA` 4 channels. It's also evidenent in the error log `C:\Program Files\Blender Foundation\Blender 3.4\3.4\scripts\addons\io_mesh_uv_layout\export_uv_png.py", line 20, in export pixel_data.dimensions = width * height * 4 AttributeError: `
DeoFaustino commented 2023-07-27 11:57:28 +02:00
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how did I not see that. So if instead RGBA we use greyscale or something, would it be lighter and easier?
(I really just use greyscale info)

how did I not see that. So if instead RGBA we use greyscale or something, would it be lighter and easier? (I really just use greyscale info)
YimingWu commented 2023-07-27 17:27:54 +02:00
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@DeoFaustino Technically it should work with grayscale, but depending on the implementation of the algorithm, it may be hard-coded to 4 channels, and this might need fixing.

@DeoFaustino Technically it should work with grayscale, but depending on the implementation of the algorithm, it may be hard-coded to 4 channels, and this might need fixing.
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YimingWu commented 2023-07-30 15:47:03 +02:00
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in gpu_py_offscreen.cc, GPU pixel format is only available in RGBA format. Which means in export_uv_png.py the gpu.types.GPUOffScreen(width, height) can only have those trpes of textures for rendering.

@Sergey @mano-wii Maybe we could add GPU_R8, GPU_RG8, GPU_RGB8 for convenience? then the export uv script could run efficiently since it's just one channel useful (It's drawing black lines on top of transparent clear color).

Maybe I could fiddle with this and come up with a patch...

Also... None of the built-in script seems to use custom format.

static const PyC_StringEnumItems pygpu_framebuffer_color_texture_formats[] = {
    {GPU_RGBA8, "RGBA8"},
    {GPU_RGBA16, "RGBA16"},
    {GPU_RGBA16F, "RGBA16F"},
    {GPU_RGBA32F, "RGBA32F"},
    {0, nullptr},
};
in `gpu_py_offscreen.cc`, GPU pixel format is only available in `RGBA` format. Which means in `export_uv_png.py` the `gpu.types.GPUOffScreen(width, height)` can only have those trpes of textures for rendering. @Sergey @mano-wii Maybe we could add `GPU_R8`, `GPU_RG8`, `GPU_RGB8` for convenience? then the export uv script could run efficiently since it's just one channel useful (It's drawing black lines on top of transparent clear color). Maybe I could fiddle with this and come up with a patch... Also... None of the built-in script seems to use custom format. ``` static const PyC_StringEnumItems pygpu_framebuffer_color_texture_formats[] = { {GPU_RGBA8, "RGBA8"}, {GPU_RGBA16, "RGBA16"}, {GPU_RGBA16F, "RGBA16F"}, {GPU_RGBA32F, "RGBA32F"}, {0, nullptr}, }; ```
YimingWu commented 2023-07-30 16:03:54 +02:00
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OK I made a patch for export_uv_png.py and gpu_py_offscreen.cc (but they are two different repo). Will make PRs for them. Test export seems to be working fine now just using grayscale.

OK I made a patch for `export_uv_png.py` and `gpu_py_offscreen.cc` (but they are two different repo). Will make PRs for them. Test export seems to be working fine now just using grayscale.
Cube.png
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Cube.png
YimingWu commented 2023-07-30 16:17:43 +02:00
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#110630 and blender/blender-addons#104800 will fix this issue.

https://projects.blender.org/blender/blender/pulls/110630 and https://projects.blender.org/blender/blender-addons/pulls/104800 will fix this issue.
YimingWu commented 2023-07-31 05:59:50 +02:00
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@DeoFaustino Is is absolutely necessary to export PNGs that big? You could apparently export to SVG and render it into whatever size raster image you want from inkscape.

@DeoFaustino Is is absolutely necessary to export PNGs that big? You could apparently export to SVG and render it into whatever size raster image you want from inkscape.
DeoFaustino commented 2023-07-31 09:43:10 +02:00
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@DeoFaustino Is is absolutely necessary to export PNGs that big? You could apparently export to SVG and render it into whatever size raster image you want from inkscape.

Hello and sorry the delay.

for me it would not really need to be 1270 (I an rescale some how) but even with the half sometimes its to big (in some cases if I go 8000x6000 it will crash same way or same error.

if I go bellow that then the rescale is not worthy because the lines are too wide and I wont be able to use them

> @DeoFaustino Is is absolutely necessary to export PNGs that big? You could apparently export to SVG and render it into whatever size raster image you want from inkscape. Hello and sorry the delay. for me it would not really need to be 1270 (I an rescale some how) but even with the half sometimes its to big (in some cases if I go 8000x6000 it will crash same way or same error. if I go bellow that then the rescale is not worthy because the lines are too wide and I wont be able to use them
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DeoFaustino commented 2023-07-31 09:44:07 +02:00
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ups, I think I closed it by accident!!!

back to the topic, should I try the addon?

ups, I think I closed it by accident!!! back to the topic, should I try the addon?
DeoFaustino commented 2023-07-31 09:44:08 +02:00
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ups, I think I closed it by accident!!!

back to the topic, should I try the addon?

ups, I think I closed it by accident!!! back to the topic, should I try the addon?
DeoFaustino commented 2023-07-31 09:44:10 +02:00
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ups, I think I closed it by accident!!!

back to the topic, should I try the addon?

ups, I think I closed it by accident!!! back to the topic, should I try the addon?
DeoFaustino commented 2023-07-31 09:44:10 +02:00
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ups, I think I closed it by accident!!!

back to the topic, should I try the addon?

ups, I think I closed it by accident!!! back to the topic, should I try the addon?
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DeoFaustino commented 2023-07-31 09:49:50 +02:00
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ups, I think I closed it by accident!!!

back to the topic, should I try the addon?

Actually, once there is somethign for me to try please give me some instrutions on to apply the add-on and then i will give it a try

> ups, I think I closed it by accident!!! > > back to the topic, should I try the addon? Actually, once there is somethign for me to try please give me some instrutions on to apply the add-on and then i will give it a try
Sergey Sharybin commented 2023-07-31 12:09:14 +02:00
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@ChengduLittleA it might be fine (to add extra formats), but to me it is hard to tell if it is something easy to add or if it will end up in a deeper change.

it is also not very clear to me how it will solve the problem of reading pixels of large textures. To me the first problem is int shape_len; in the BPyGPUBuffer. I'd expect it to be size_t.

I'd also imagine that there will be some other limitations like texture size limit on GPU.

@ChengduLittleA it might be fine (to add extra formats), but to me it is hard to tell if it is something easy to add or if it will end up in a deeper change. it is also not very clear to me how it will solve the problem of reading pixels of large textures. To me the first problem is `int shape_len;` in the `BPyGPUBuffer`. I'd expect it to be `size_t`. I'd also imagine that there will be some other limitations like texture size limit on GPU.
YimingWu commented 2023-07-31 13:11:58 +02:00
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Yeah if it's size_t then it can solve the immediate problem of 32 bit integer overflowing, but yes it will also need to comply with OpenGL texture size limit. If GPU does support, then we don't need to do anything extra for this particular issue to work. I can't test such big texture since on my machine GL_MAX_TEXTURE_SIZE is only 16384, A 2D texture of that size with 4 channels will just reach 31 bit... Unless we implement tiled uv export, we probably won't be able to support exporting to that big of a size.

I'll check and see if I can give a patch to fix int shape_len into size_t. Thanks @Sergey

@DeoFaustino You will probably need to export SVG and render it into raster in some way eventually. Since it's really rare to have such a huge texture.

Yeah if it's `size_t` then it can solve the immediate problem of 32 bit integer overflowing, but yes it will also need to comply with OpenGL texture size limit. If GPU does support, then we don't need to do anything extra for this particular issue to work. I can't test such big texture since on my machine `GL_MAX_TEXTURE_SIZE` is only 16384, A 2D texture of that size with 4 channels will just reach 31 bit... Unless we implement tiled uv export, we probably won't be able to support exporting to that big of a size. I'll check and see if I can give a patch to fix `int shape_len` into `size_t`. Thanks @Sergey @DeoFaustino You will probably need to export SVG and render it into raster in some way eventually. Since it's really rare to have such a huge texture.
DeoFaustino commented 2023-07-31 13:46:41 +02:00
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Ok, but even for SVG its telling the max size is 32768.

If you want I can try to share a model and the workfload so you can try to replicate

Ok, but even for SVG its telling the max size is 32768. If you want I can try to share a model and the workfload so you can try to replicate
YimingWu commented 2023-07-31 13:49:08 +02:00
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@DeoFaustino for SVG it really doesn't matter the size in pixel, it's vector so you should be able to scale it to whatever size you want.

@DeoFaustino for SVG it really doesn't matter the size in pixel, it's vector so you should be able to scale it to whatever size you want.
DeoFaustino commented 2023-07-31 14:01:39 +02:00
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testing that now, Photoshop does not allow to rasterize the SVG above 640mm or 32000 pixeis for a 1270 px/inch resolution...

testing that now, Photoshop does not allow to rasterize the SVG above 640mm or 32000 pixeis for a 1270 px/inch resolution...
YimingWu commented 2023-07-31 14:33:47 +02:00
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@DeoFaustino Apparently inkscape can write to such big image without issue. Just tested 65536*92687

Will try fix the size_t issue then.

@DeoFaustino Apparently inkscape can write to such big image without issue. Just tested `65536*92687` Will try fix the `size_t` issue then.
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Jesse Yurkovich commented 2023-08-01 01:01:59 +02:00
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I took a look at this bug as well:

  • Yes, Blender's GPU Py interop code has some issues. The minimal change necessary to get past the initial error is below [1]
  • Additionally, OpenImageIO's Py interop also has a bug that will affect this. I submitted and checked in a patch there [2]. So we will need to compile a new version of the library if we want to address the PNG issue entirely.

[1] Quick Blender change -- We were using the wrong python API to read into one of our arrays. There might be some other spots that need fixing.

diff --git a/source/blender/python/gpu/gpu_py_buffer.cc b/source/blender/python/gpu/gpu_py_buffer.cc
index 57c52b3ff4b..ed51c6e2827 100644
--- a/source/blender/python/gpu/gpu_py_buffer.cc
+++ b/source/blender/python/gpu/gpu_py_buffer.cc
@@ -62,11 +62,11 @@ static bool pygpu_buffer_pyobj_as_shape(PyObject *shape_obj,
                                         Py_ssize_t *r_shape_len)
 {
   Py_ssize_t shape_len = 0;
   if (PyLong_Check(shape_obj)) {
     shape_len = 1;
-    if ((r_shape[0] = PyLong_AsLong(shape_obj)) < 1) {
+    if ((r_shape[0] = PyLong_AsSsize_t(shape_obj)) < 1) {
       PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1");
       return false;
     }
   }
   else if (PySequence_Check(shape_obj)) {

[2] https://github.com/OpenImageIO/oiio/commit/c97826c144c13781c7dd390bc16f4acfa11a0da8

I took a look at this bug as well: - Yes, Blender's GPU Py interop code has some issues. The minimal change necessary to get past the initial error is below [1] - Additionally, OpenImageIO's Py interop also has a bug that will affect this. I submitted and checked in a patch there [2]. So we will need to compile a new version of the library if we want to address the PNG issue entirely. [1] Quick Blender change -- We were using the wrong python API to read into one of our arrays. There might be some other spots that need fixing. ```diff diff --git a/source/blender/python/gpu/gpu_py_buffer.cc b/source/blender/python/gpu/gpu_py_buffer.cc index 57c52b3ff4b..ed51c6e2827 100644 --- a/source/blender/python/gpu/gpu_py_buffer.cc +++ b/source/blender/python/gpu/gpu_py_buffer.cc @@ -62,11 +62,11 @@ static bool pygpu_buffer_pyobj_as_shape(PyObject *shape_obj, Py_ssize_t *r_shape_len) { Py_ssize_t shape_len = 0; if (PyLong_Check(shape_obj)) { shape_len = 1; - if ((r_shape[0] = PyLong_AsLong(shape_obj)) < 1) { + if ((r_shape[0] = PyLong_AsSsize_t(shape_obj)) < 1) { PyErr_SetString(PyExc_AttributeError, "dimension must be greater than or equal to 1"); return false; } } else if (PySequence_Check(shape_obj)) { ``` [2] [https://github.com/OpenImageIO/oiio/commit/c97826c144c13781c7dd390bc16f4acfa11a0da8](https://github.com/OpenImageIO/oiio/commit/c97826c144c13781c7dd390bc16f4acfa11a0da8)
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Iliya Katushenock commented 2023-08-04 03:35:51 +02:00
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The module is setted, the bug is defined as a fact. Confirming, as sorting doesn't seem to be required.

The module is setted, the bug is defined as a fact. Confirming, as sorting doesn't seem to be required.
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