Bug 499510

SUMMARY
The drawing process is disrupted by each pen lagging. It takes a long time for it to actually make the brush stroke appear once I draw with my pen.

STEPS TO REPRODUCE
1. Make a brush stroke
2. Zoom in
3. Make another brush stroke

OBSERVED RESULT
The stroke needs a few seconds to appear. This really disrupts the process.

EXPECTED RESULT
Usually it should draw smoothly.

SOFTWARE/OS VERSIONS

  Build ABI: arm64-little_endian-lp64
  Build CPU: arm64
  CPU: arm64
  Kernel Type: linux
  Kernel Version: 4.19.113-27114284
  Pretty Productname: Android  (13.0)
  Product Type: android
  Product Version: 13.0
  Product Model: Samsung SM-T970
KDE Frameworks Version: 
  Krita Version: 5.2.9 (git ac6cae8)
  Hidpi: true
Qt Version: Version (compiled): 5.15.7
Version (loaded): 5.15.7

ADDITIONAL INFORMATION

OpenGL Info
 
  Vendor:  "Qualcomm" 
  Renderer:  "Adreno (TM) 650" 
  Driver version:  "OpenGL ES 3.2 V@0502.0 (GIT@193b2ee, I593c16c433, 1633593732) (Date:10/07/21)" 
  Shading language:  "OpenGL ES GLSL ES 3.20" 
  Requested format:  QSurfaceFormat(version 3.0, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples -1, swapBehavior QSurfaceFormat::DoubleBuffer, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) 
  Current format:  QSurfaceFormat(version 3.2, options QFlags<QSurfaceFormat::FormatOption>(), depthBufferSize 24, redBufferSize 8, greenBufferSize 8, blueBufferSize 8, alphaBufferSize 8, stencilBufferSize 8, samples 0, swapBehavior QSurfaceFormat::DefaultSwapBehavior, swapInterval 0, colorSpace QSurfaceFormat::DefaultColorSpace, profile  QSurfaceFormat::NoProfile) 
  GL version: 3.2 
  Supports deprecated functions false 
  Is OpenGL ES: true 
  supportsBufferMapping: true 
  supportsBufferInvalidation: false 
  forceDisableTextureBuffers: false 
  Extensions: 
     GL_OES_compressed_ETC1_RGB8_texture 
     GL_EXT_sRGB_write_control 
     GL_EXT_fragment_invocation_density 
     GL_OES_shader_multisample_interpolation 
     GL_OES_texture_view 
     GL_KHR_debug 
     GL_EXT_texture_norm16 
     GL_EXT_texture_sRGB_R8 
     GL_EXT_blit_framebuffer_params 
     GL_OES_EGL_image_external_essl3 
     GL_OES_shader_image_atomic 
     GL_OES_depth24 
     GL_OES_element_index_uint 
     GL_OES_depth_texture_cube_map 
     GL_QCOM_motion_estimation 
     GL_EXT_multisampled_render_to_texture2 
     GL_EXT_EGL_image_external_wrap_modes 
     GL_OES_standard_derivatives 
     GL_EXT_disjoint_timer_query 
     GL_EXT_read_format_bgra 
     GL_EXT_clip_cull_distance 
     GL_OES_texture_3D 
     GL_OES_get_program_binary 
     GL_EXT_debug_marker 
     GL_QCOM_alpha_test 
     GL_EXT_sRGB 
     GL_KHR_texture_compression_astc_hdr 
     GL_EXT_tessellation_shader 
     GL_QCOM_tiled_rendering 
     GL_EXT_memory_object_fd 
     GL_EXT_geometry_shader 
     GL_OES_rgb8_rgba8 
     GL_EXT_multisampled_render_to_texture 
     GL_OES_surfaceless_context 
     GL_EXT_clip_control 
     GL_QCOM_YUV_texture_gather 
     GL_OES_EGL_sync 
     GL_EXT_copy_image 
     GL_OES_texture_npot 
     GL_EXT_shader_framebuffer_fetch 
     GL_KHR_blend_equation_advanced 
     GL_EXT_color_buffer_float 
     GL_QCOM_shader_framebuffer_fetch_noncoherent 
     GL_KHR_blend_equation_advanced_coherent 
     GL_EXT_texture_format_BGRA8888 
     GL_KHR_robust_buffer_access_behavior 
     GL_EXT_protected_textures 
     GL_OES_texture_float_linear 
     GL_OES_sample_shading 
     GL_EXT_texture_buffer 
     GL_OES_framebuffer_object 
     GL_EXT_debug_label 
     GL_KHR_no_error 
     GL_OVR_multiview_multisampled_render_to_texture 
     GL_EXT_blend_func_extended 
     GL_EXT_shader_io_blocks 
     GL_EXT_primitive_bounding_box 
     GL_KHR_texture_compression_astc_ldr 
     GL_EXT_memory_object 
     GL_EXT_gpu_shader5 
     GL_OVR_multiview 
     GL_QCOM_texture_foveated 
     GL_OES_packed_depth_stencil 
     GL_EXT_external_buffer 
     GL_QCOM_texture_foveated_subsampled_layout 
     GL_OES_texture_compression_astc 
     GL_EXT_texture_filter_anisotropic 
     GL_NV_shader_noperspective_interpolation 
     GL_EXT_robustness 
     GL_OVR_multiview2 
     GL_EXT_EGL_image_storage 
     GL_OES_vertex_half_float 
     GL_EXT_shader_non_constant_global_initializers 
     GL_EXT_texture_sRGB_decode 
     GL_OES_EGL_image 
     GL_EXT_color_buffer_half_float 
     GL_EXT_buffer_storage 
     GL_OES_texture_half_float 
     GL_EXT_texture_border_clamp 
     GL_ARM_shader_framebuffer_fetch_depth_stencil 
     GL_OES_depth_texture 
     GL_EXT_YUV_target 
     GL_EXT_texture_cube_map_array 
     GL_EXT_discard_framebuffer 
     GL_QCOM_validate_shader_binary 
     GL_QCOM_shader_framebuffer_fetch_rate 
     GL_EXT_draw_buffers_indexed 
     GL_OES_texture_stencil8 
     GL_OES_vertex_array_object 
     GL_ANDROID_extension_pack_es31a 
     GL_OES_texture_float 
     GL_EXT_texture_type_2_10_10_10_REV 
     GL_EXT_texture_format_sRGB_override 
     GL_EXT_EGL_image_array 
     GL_OES_texture_half_float_linear 
     GL_OES_EGL_image_external 
     GL_AMD_compressed_ATC_texture 
     GL_OES_texture_storage_multisample_2d_array 
     GL_OES_sample_variables 

QPA OpenGL Detection Info 
  supportsDesktopGL: false 
  supportsOpenGLES: true 
  isQtPreferOpenGLES: true 
  Detected renderers: 
    (Supported) Adreno (TM) 650 (OpenGL ES 3.2 V@0502.0 (GIT@193b2ee, I593c16c433, 1633593732) (Date:10/07/21))  

useBufferInvalidation (config option): false


Hardware Information

  GPU Acceleration: auto
  Memory: 7623 Mb
  Number of Cores: 8
  Swap Location: /data/data/org.krita/cache
  Built for: arm64+neon
  Base instruction set: arm64+neon
  Supported instruction sets: neon neon64

Current Settings

  Current Swap Location: /data/data/org.krita/cache
  Current Swap Location writable: true
  Undo Enabled: true
  Undo Stack Limit: 200
  Use OpenGL: true
  Use OpenGL Texture Buffer: true
  Disable Vector Optimizations: false
  Disable AVX Optimizations: false
  Canvas State: OPENGL_SUCCESS
  Autosave Interval: 420
  Use Backup Files: true
  Number of Backups Kept: 1
  Backup File Suffix: ~
  Backup Location: Same Folder as the File
  Backup Location writable: false
  Resource Location: 
  Use Win8 Pointer Input: false
  Use RightMiddleTabletButton Workaround: false
  Levels of Detail Enabled: false
  Use Zip64: false


Display Information
Number of screens: 1
	Screen: 0
		Name: 
		Depth: 32
		Scale: 2.125
		Physical DPI125.463
		Logical DPI72
		Physical Size: 267, 157
		Position: 0, 0
		Resolution in pixels: 1318x776
		Manufacturer: 
		Model: 
		Refresh Rate: 60