screenshot empty when running on android

[zhuker]

1 Fresh git checkout
2 Run on Android 13, 14, 15
3 Draws fine, click "Take screenshot"
4 screenshot.ppm is filled with zeros

[zhuker]

debugger shows zero-filled data after

		// Map image memory so we can start copying from it
		const char* data;
		vkMapMemory(device, dstImageMemory, 0, VK_WHOLE_SIZE, 0, (void**)&data);

[zhuker]

Also I see a bunch of messages like this in logcat

2025-02-06 01:41:47.194 26350-26449 BufferQueueProducer     de.saschawillems.vulkanScreenshot    D  [VRI[VulkanActivity]#0(BLAST Consumer)0](id:66ee00000000,api:1,p:26350,c:26350) connect: api=1 producerControlledByApp=true
2025-02-06 01:41:47.202 26350-26449 BufferQueueProducer     de.saschawillems.vulkanScreenshot    D  [VRI[VulkanActivity]#0(BLAST Consumer)0](id:66ee00000000,api:1,p:26350,c:26350) disconnect: api 1