Text rasterization issues

[Maxime Dumas]

Hello,

I noticed a couple of weeks ago that some of the fonts on our canvas charts changed and looked bolder. The following image shows the issue.

The issue only appears to arise on Chrome, and when hardware acceleration is enabled (or more precisely, when #enable-gpu-rasterization is active). I updated my video card drivers, but the issue is still present. I was also able to notice the issue on someone else's computer. But most of my collegues don't have this issue, and are using the same version of Chrome and the same hardware.

Also, if I create a new user profile in Chrome or if I remove the profile folder in C:\Users\[user]\AppData\Local\Google\Chrome, it works fine for a while. But after a couple of hours, the issue did reappear.

Resetting the profile using the button in the settings page does nothing. Disabling all of the extensions doesn't solve the issue neither.

Here is the GPU output

Graphics Feature Status

• Canvas: Hardware accelerated
• Flash: Hardware accelerated
• Flash Stage3D: Hardware accelerated
• Flash Stage3D Baseline profile: Hardware accelerated
• Compositing: Hardware accelerated
• Multiple Raster Threads: Enabled
• Native GpuMemoryBuffers: Software only. Hardware acceleration disabled
• Rasterization: Hardware accelerated
• Video Decode: Hardware accelerated
• Video Encode: Hardware accelerated
• VPx Video Decode: Software only, hardware acceleration unavailable
• WebGL: Hardware accelerated
• WebGL2: Hardware accelerated

Driver Bug Workarounds

• clear_uniforms_before_first_program_use
• decode_encode_srgb_for_generatemipmap
• disable_discard_framebuffer
• disable_dxgi_zero_copy_video
• disable_framebuffer_cmaa
• disable_nv12_dxgi_video
• exit_on_context_lost
• force_cube_complete
• scalarize_vec_and_mat_constructor_args
• texsubimage_faster_than_teximage

Problems Detected

• VPx decoding isn't supported before Windows 10 anniversary update.: 616318
  Disabled Features: accelerated_vpx_decode
• Some drivers are unable to reset the D3D device in the GPU process sandbox
  Applied Workarounds: exit_on_context_lost
• TexSubImage is faster for full uploads on ANGLE
  Applied Workarounds: texsubimage_faster_than_teximage
• Clear uniforms before first program use on all platforms: 124764, 349137
  Applied Workarounds: clear_uniforms_before_first_program_use
• Always rewrite vec/mat constructors to be consistent: 398694
  Applied Workarounds: scalarize_vec_and_mat_constructor_args
• ANGLE crash on glReadPixels from incomplete cube map texture: 518889
  Applied Workarounds: force_cube_complete
• Framebuffer discarding can hurt performance on non-tilers: 570897
  Applied Workarounds: disable_discard_framebuffer
• NV12 DXGI video hangs or displays incorrect colors on AMD drivers: 623029, 644293
  Applied Workarounds: disable_dxgi_zero_copy_video, disable_nv12_dxgi_video
• Limited enabling of Chromium GL_INTEL_framebuffer_CMAA: 535198
  Applied Workarounds: disable_framebuffer_cmaa
• Disable KHR_blend_equation_advanced until cc shaders are updated: 661715
• Decode and Encode before generateMipmap for srgb format textures on Windows: 634519
  Applied Workarounds: decode_encode_srgb_for_generatemipmap
• Native GpuMemoryBuffers have been disabled, either via about:flags or command line.
  Disabled Features: native_gpu_memory_buffers

Version Information

Data exported	29/05/2017 à 13:34:11
Chrome version	Chrome/58.0.3029.110
Operating system	Windows NT 10.0.10586
Software rendering list version	12.20
Driver bug list version	9.36
ANGLE commit id	461d9a3060e3
2D graphics backend	Skia/58 4c81ba6ba3a3270db809bf7d4c3bc782694a56a4
Command Line Args	Files (x86)\Google\Chrome\Application\chrome.exe" --flag-switches-begin --flag-switches-end

Driver Information

Initialization time	483
In-process GPU	false
Passthrough Command Decoder	false
Sandboxed	false
GPU0	VENDOR = 0x1002, DEVICE= 0x6610
Optimus	false
Optimus	false
AMD switchable	false
Desktop compositing	Aero Glass
Diagonal Monitor Size of \\.\DISPLAY2	23.9"
Diagonal Monitor Size of \\.\DISPLAY1	23.9"
Driver vendor	Advanced Micro Devices, Inc.
Driver version	22.19.162.4
Driver date	4-24-2017
Pixel shader version	5.0
Vertex shader version	5.0
Max. MSAA samples	8
Machine model name
Machine model version
GL_VENDOR	Google Inc.
GL_RENDERER	ANGLE (AMD Radeon R7 200 Series Direct3D11 vs_5_0 ps_5_0)
GL_VERSION	OpenGL ES 3.0 (ANGLE 2.1.0.461d9a3060e3)
GL_EXTENSIONS	GL_ANGLE_client_arrays GL_ANGLE_depth_texture GL_ANGLE_framebuffer_blit GL_ANGLE_framebuffer_multisample GL_ANGLE_instanced_arrays GL_ANGLE_lossy_etc_decode GL_ANGLE_pack_reverse_row_order GL_ANGLE_request_extension GL_ANGLE_robust_client_memory GL_ANGLE_texture_compression_dxt3 GL_ANGLE_texture_compression_dxt5 GL_ANGLE_texture_usage GL_ANGLE_translated_shader_source GL_CHROMIUM_bind_generates_resource GL_CHROMIUM_bind_uniform_location GL_CHROMIUM_copy_compressed_texture GL_CHROMIUM_copy_texture GL_CHROMIUM_sync_query GL_EXT_blend_minmax GL_EXT_color_buffer_float GL_EXT_color_buffer_half_float GL_EXT_debug_marker GL_EXT_discard_framebuffer GL_EXT_disjoint_timer_query GL_EXT_draw_buffers GL_EXT_frag_depth GL_EXT_map_buffer_range GL_EXT_occlusion_query_boolean GL_EXT_read_format_bgra GL_EXT_robustness GL_EXT_sRGB GL_EXT_shader_texture_lod GL_EXT_texture_compression_dxt1 GL_EXT_texture_compression_s3tc_srgb GL_EXT_texture_filter_anisotropic GL_EXT_texture_format_BGRA8888 GL_EXT_texture_norm16 GL_EXT_texture_rg GL_EXT_texture_storage GL_EXT_unpack_subimage GL_KHR_debug GL_NV_EGL_stream_consumer_external GL_NV_fence GL_NV_pack_subimage GL_NV_pixel_buffer_object GL_OES_EGL_image GL_OES_EGL_image_external GL_OES_EGL_image_external_essl3 GL_OES_compressed_ETC1_RGB8_texture GL_OES_depth32 GL_OES_element_index_uint GL_OES_get_program_binary GL_OES_mapbuffer GL_OES_packed_depth_stencil GL_OES_rgb8_rgba8 GL_OES_standard_derivatives GL_OES_texture_float GL_OES_texture_float_linear GL_OES_texture_half_float GL_OES_texture_half_float_linear GL_OES_texture_npot GL_OES_vertex_array_object
Disabled Extensions	GL_KHR_blend_equation_advanced GL_KHR_blend_equation_advanced_coherent
Window system binding vendor	Google Inc. (adapter LUID: 0000000000006a74)
Window system binding version	1.4 (ANGLE 2.1.0.461d9a3060e3)
Window system binding extensions	EGL_EXT_create_context_robustness EGL_ANGLE_d3d_share_handle_client_buffer EGL_ANGLE_d3d_texture_client_buffer EGL_ANGLE_surface_d3d_texture_2d_share_handle EGL_ANGLE_query_surface_pointer EGL_ANGLE_window_fixed_size EGL_ANGLE_keyed_mutex EGL_ANGLE_surface_orientation EGL_ANGLE_direct_composition EGL_NV_post_sub_buffer EGL_KHR_create_context EGL_EXT_device_query EGL_KHR_image EGL_KHR_image_base EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_get_all_proc_addresses EGL_KHR_stream EGL_KHR_stream_consumer_gltexture EGL_NV_stream_consumer_gltexture_yuv EGL_ANGLE_flexible_surface_compatibility EGL_ANGLE_stream_producer_d3d_texture_nv12 EGL_ANGLE_create_context_webgl_compatibility EGL_CHROMIUM_create_context_bind_generates_resource EGL_EXT_pixel_format_float EGL_ANGLE_display_texture_share_group EGL_ANGLE_create_context_client_arrays
Direct rendering	Yes
Reset notification strategy	0x8252
GPU process crash count	0

Compositor Information

Tile Update Mode	One-copy
Partial Raster	Enabled

GpuMemoryBuffers Status

ATC	Software only
ATCIA	Software only
DXT1	Software only
DXT5	Software only
ETC1	Software only
R_8	Software only
RG_88	Software only
BGR_565	Software only
RGBA_4444	Software only
RGBX_8888	Software only
RGBA_8888	Software only
BGRX_8888	Software only
BGRA_8888	Software only
YVU_420	Software only
YUV_420_BIPLANAR	Software only
UYVY_422	Software only

Diagnostics

0 b3DAccelerationEnabled true b3DAccelerationExists true bAGPEnabled true bAGPExistenceValid true bAGPExists true bCanRenderWindow true bDDAccelerationEnabled true bDriverBeta false bDriverDebug false bDriverSigned false bDriverSignedValid false bNoHardware false dwBpp 32 dwDDIVersion 12 dwHeight 1080 dwRefreshRate 60 dwWHQLLevel 0 dwWidth 1920 iAdapter 0 lDriverSize 1676248 lMiniVddSize 0 szAGPStatusEnglish Enabled szAGPStatusLocalized Enabled szChipType AMD Radeon Graphics Processor (0x6610) szD3DStatusEnglish Enabled szD3DStatusLocalized Enabled szDACType Internal DAC(400MHz) szDDIVersionEnglish 12 szDDIVersionLocalized 12 szDDStatusEnglish Enabled szDDStatusLocalized Enabled szDXVAHDEnglish Not Supported szDXVAModes ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C szDescription AMD Radeon R7 200 Series szDeviceId 0x6610 szDeviceIdentifier {D7B71EE2-2550-11CF-9C73-8201BCC2DB35} szDeviceName \\.\DISPLAY1 szDisplayMemoryEnglish 10191 MB szDisplayMemoryLocalized 10191 MB szDisplayModeEnglish 1920 x 1080 (32 bit) (60Hz) szDisplayModeLocalized 1920 x 1080 (32 bit) (60Hz) szDriverAssemblyVersion 22.19.162.4 szDriverAttributes Final Retail szDriverDateEnglish 4/24/2017 12:00:00 AM szDriverDateLocalized 4/24/2017 00:00:00 szDriverLanguageEnglish English szDriverLanguageLocalized English szDriverModelEnglish WDDM 2.0 szDriverModelLocalized WDDM 2.0 szDriverName aticfx64.dll,aticfx64.dll,aticfx64.dll,amdxc64.dll,aticfx32,aticfx32,aticfx32,amdxc32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll szDriverNodeStrongName oem52.inf:cb0ae414555c5f0a:ati2mtag_R501:22.19.162.4:pci\ven_1002&dev_6610&rev_00 szDriverSignDate szDriverVersion 22.19.0162.0004 szKeyDeviceID Enum\PCI\VEN_1002&DEV_6610&SUBSYS_21201028&REV_00 szKeyDeviceKey \Registry\Machine\System\CurrentControlSet\Control\Video\{123B9CF2-6F42-4A22-B6E3-6955E4DACA2F}\0000 szManufacturer Advanced Micro Devices, Inc. szMiniVdd n/a szMiniVddDateEnglish n/a szMiniVddDateLocalized n/a szMonitorMaxRes szMonitorName BenQ GL2450H szNotesEnglish No problems found. szNotesLocalized No problems found. szOverlayEnglish Not Supported szRankOfInstalledDriver 00D12000 szRegHelpText szRevision szRevisionId 0x0000 szSubSysId 0x21201028 szTestResultD3D7English Not run szTestResultD3D7Localized Not run szTestResultD3D8English Not run szTestResultD3D8Localized Not run szTestResultD3D9English Not run szTestResultD3D9Localized Not run szTestResultDDEnglish Not run szTestResultDDLocalized Not run szVdd n/a szVendorId 0x1002

1 b3DAccelerationEnabled true b3DAccelerationExists true bAGPEnabled true bAGPExistenceValid true bAGPExists true bCanRenderWindow true bDDAccelerationEnabled true bDriverBeta false bDriverDebug false bDriverSigned false bDriverSignedValid false bNoHardware false dwBpp 32 dwDDIVersion 12 dwHeight 1080 dwRefreshRate 60 dwWHQLLevel 0 dwWidth 1920 iAdapter 1 lDriverSize 1676248 lMiniVddSize 0 szAGPStatusEnglish Enabled szAGPStatusLocalized Enabled szChipType AMD Radeon Graphics Processor (0x6610) szD3DStatusEnglish Enabled szD3DStatusLocalized Enabled szDACType Internal DAC(400MHz) szDDIVersionEnglish 12 szDDIVersionLocalized 12 szDDStatusEnglish Enabled szDDStatusLocalized Enabled szDXVAHDEnglish Not Supported szDXVAModes ModeMPEG2_A ModeMPEG2_C ModeVC1_C ModeWMV9_C szDescription AMD Radeon R7 200 Series szDeviceId 0x6610 szDeviceIdentifier {D7B71EE2-2550-11CF-9C73-8201BCC2DB35} szDeviceName \\.\DISPLAY2 szDisplayMemoryEnglish 10191 MB szDisplayMemoryLocalized 10191 MB szDisplayModeEnglish 1920 x 1080 (32 bit) (60Hz) szDisplayModeLocalized 1920 x 1080 (32 bit) (60Hz) szDriverAssemblyVersion 22.19.162.4 szDriverAttributes Final Retail szDriverDateEnglish 4/24/2017 12:00:00 AM szDriverDateLocalized 4/24/2017 00:00:00 szDriverLanguageEnglish English szDriverLanguageLocalized English szDriverModelEnglish WDDM 2.0 szDriverModelLocalized WDDM 2.0 szDriverName aticfx64.dll,aticfx64.dll,aticfx64.dll,amdxc64.dll,aticfx32,aticfx32,aticfx32,amdxc32,atiumd64.dll,atidxx64.dll,atidxx64.dll,atiumdag,atidxx32,atidxx32,atiumdva,atiumd6a.cap,atitmm64.dll szDriverNodeStrongName oem52.inf:cb0ae414555c5f0a:ati2mtag_R501:22.19.162.4:pci\ven_1002&dev_6610&rev_00 szDriverSignDate szDriverVersion 22.19.0162.0004 szKeyDeviceID Enum\PCI\VEN_1002&DEV_6610&SUBSYS_21201028&REV_00 szKeyDeviceKey \Registry\Machine\System\CurrentControlSet\Control\Video\{123B9CF2-6F42-4A22-B6E3-6955E4DACA2F}\0001 szManufacturer Advanced Micro Devices, Inc. szMiniVdd n/a szMiniVddDateEnglish n/a szMiniVddDateLocalized n/a szMonitorMaxRes szMonitorName BenQ GL2450H szNotesEnglish No problems found. szNotesLocalized No problems found. szOverlayEnglish Not Supported szRankOfInstalledDriver 00D12000 szRegHelpText szRevision szRevisionId 0x0000 szSubSysId 0x21201028 szTestResultD3D7English Not run szTestResultD3D7Localized Not run szTestResultD3D8English Not run szTestResultD3D8Localized Not run szTestResultD3D9English Not run szTestResultD3D9Localized Not run szTestResultDDEnglish Not run szTestResultDDLocalized Not run szVdd n/a szVendorId 0x1002

Log Messages

• GpuProcessHostUIShim: The GPU process exited normally. Everything is okay.

Any idea?

Thank you!

[P. SRI RAM]

Hi Maxime,

 

We are facing this same issue while drawing text contents in latest chrome. Sometimes the text will be darker and sometimes it is lighter. That is the text rendering is inconsistent. We have reported this issue in google forum. but we can't get the solution. Please find the below forum link for your reference.

 

Forum Link:

https://productforums.google.com/forum/#!msg/chrome/pyLTsyRfGcs/aC8DcK-QAgAJ

 

Please let us know if this issue fixed in your side. 

 

Regards,

Sriram P