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Implementation and structure ideas

Webgl1 vs Webgl2

from an answer on stackoverflow, the promoted extensions:

// 14 extensions were promoted in WebGL2 [ 'ANGLE_instanced_arrays', 'EXT_blend_minmax', 'EXT_frag_depth', 'EXT_shader_texture_lod', 'OES_element_index_uint', 'OES_standard_derivatives', 'OES_texture_float', 'OES_texture_half_float', 'WEBGL_depth_texture', 'WEBGL_draw_buffers', /* with caveats */ 'EXT_sRGB', 'OES_texture_half_float_linear', 'EXT_disjoint_timer_query', ]

Please note that last three extensions were promoted with caveats. Extension EXT_sRGB lost a constant SRGB_ALPHA. Extension OES_texture_half_float_linear was promoted while analogous OES_texture_float_linear was not. Extension EXT_disjoint_timer_query promoted partially. Some properties of that extension appeared in WebGL2 context, while other properties were moved to EXT_disjoint_timer_query_webgl2 extension. Also, currently ( 2017.05.16 ) Firefox WebGL2 context still has EXT_disjoint_timer_query extensions and no EXT_disjoint_timer_query_webgl2 extension.

So ideally the api of WebGl1 and Webgl2 should be as equal as possible using these extensions to fill in the gaps in webgl1. This way we can use traits for shared functionality and provide custom implementation where necessary.

OES_vertex_array_object

provides the vertexarray interface

Parameter methods

Prerequisites:

  • Splitting of the different objects by making custom structs with reference to context
  • methods working on these objects are implemented straight on these custom structs
  • Separate into modules but pub use in root Idea:
  • for context state info split the get parameter methods all up in their own separate methods
  • for parameters of related opbject split into methods of these objects

Image loading

type of srcData type
Int8Array BYTE
Uint8Array UNSIGNED_BYTE
Int16Array SHORT
Uint16Array UNSIGNED_SHORT
Uint16Array UNSIGNED_SHORT_5_6_5
Uint16Array UNSIGNED_SHORT_5_5_5_1
Uint16Array UNSIGNED_SHORT_4_4_4_4
Int32Array INT
Uint32Array UNSIGNED_INT
Uint32Array UNSIGNED_INT_5_9_9_9_REV
Uint32Array UNSIGNED_INT_2_10_10_10_REV
Uint32Array UNSIGNED_INT_10F_11F_11F_REV
Uint32Array UNSIGNED_INT_24_8
Uint16Array HALF_FLOAT
Float32Array FLOAT