844715 - Assertion failure: false (Draw FB binding misprediction!)

Status: RESOLVED INACTIVE

(Core :: Graphics: CanvasWebGL, defect)

Description

[Oleg Romashin (:romaxa)]

Attempt to load simple webgl page failed with next error:
Attempting load of libEGL.so
Extensions: EGL_KHR_image EGL_KHR_image_base EGL_KHR_image_pixmap EGL_NOK_image_shared EGL_KHR_gl_texture_2D_image EGL_KHR_gl_texture_cubemap_image EGL_KHR_gl_renderbuffer_image EGL_KHR_vg_parent_image EGL_NOKIA_texture_from_pixmap EGL_NOK_texture_from_pixmap EGL_KHR_fence_sync EGL_IMG_context_priority EGL_KHR_lock_surface EGL_KHR_lock_surface2 EGL_NOK_image_yuv EGL_NOK_image_yuv_pixmap EGL_NOK_image_yuv_framebuffer EGL_NOK_image_framebuffer 
Found extension EGL_KHR_image
Found extension EGL_KHR_image_base
Found extension EGL_KHR_image_pixmap
Found extension EGL_KHR_gl_texture_2D_image
Found extension EGL_KHR_fence_sync
Found extension EGL_KHR_lock_surface
Initializing context (nil) surface 0xe on display 0x1
OpenGL vendor ('Imagination Technologies') recognized as: (null)
Extensions: GL_OES_rgb8_rgba8 GL_OES_depth24 GL_OES_vertex_half_float GL_OES_texture_float GL_OES_texture_half_float GL_OES_element_index_uint GL_OES_mapbuffer GL_OES_fragment_precision_high GL_OES_compressed_ETC1_RGB8_texture GL_OES_EGL_image GL_OES_required_internalformat GL_OES_depth_texture GL_OES_get_program_binary GL_OES_standard_derivatives GL_OES_EGL_image_external GL_EXT_multi_draw_arrays GL_EXT_texture_format_BGRA8888 GL_IMG_shader_binary GL_IMG_texture_compression_pvrtc GL_IMG_texture_stream2 GL_IMG_texture_npot GL_IMG_texture_format_BGRA8888 GL_OES_EGL_sync GL_IMG_read_format GL_IMG_program_binary 
Found extension GL_OES_rgb8_rgba8
Found extension GL_OES_depth24
Found extension GL_OES_texture_float
Found extension GL_OES_EGL_image
Found extension GL_OES_depth_texture
Found extension GL_OES_standard_derivatives
Found extension GL_OES_EGL_image_external
Found extension GL_EXT_texture_format_BGRA8888
Found extension GL_IMG_texture_compression_pvrtc
Found extension GL_OES_EGL_sync
Found extension GL_IMG_read_format
Can't find symbol 'GetTexImage'.
Can't find symbol 'GetTexLevelParameteriv'.

--- WebGL context created: 0x7e1c90

Initializing context 0xf7f58 surface 0x105ba8 on display 0x1
Can't find symbol 'GetTexImage'.
Can't find symbol 'GetTexLevelParameteriv'.
Misprediction: Bound draw FB predicted: 70001. Was: 0.
Assertion failure: false (Draw FB binding misprediction!), at /gfx/gl/GLScreenBuffer.cpp:194

jgilbert - any ideas what is going on?

Comment 1

[Oleg Romashin (:romaxa)]

Attachment: Backtrace

Comment 2

[Kelsey Gilbert [:jgilbert]]

Attachment: patch

It sounds like the GLContext's GLScreenBuffer is not being initialized properly.

Does this patch help? It binds FBs to zero in GLScreenBuffer::Create.

Comment 3

[Oleg Romashin (:romaxa)]

Also when WebGL context enabled I see this crash again... it seems we do not cleanup some context state or have some problem with threads...

1)WebGL context render:
2) Native render:
PVR:Aborting: Offset to VBO out of bounds. Likely an app bug in glVertexAttribPointer

if WebGL iteration excluded then it works ok