Web Gl Cheat Sheet (Page 3 of 4) in pdf

Blending

Stencil buffer

enable|disable(

BLEND )

STENCIL_TEST )

void

Enable/disable blending

Enable/disable stencil testing.

blendFunc(

stencilFunc(

void

ulong sfactor, ulong dfactor )

void

ulong func, long ref, ulong mask )

Specify pixel arithmetic. Accepted values for sfactor

Set front and back function and reference value for

and dfactor are:

stencil testing. Parameter func is one of:

ZERO

ONE

NEVER

LESS

EQUAL

LEQUAL

SRC_COLOR

DST_COLOR

GREATER

NOTEQUAL GEQUAL

ALWAYS

SRC_ALPHA

DST_ALPHA

stencilFuncSeparate(

ulong face, ulong func,

void

CONSTANT_COLOR

CONSTANT_ALPHA

long ref, ulong mask )

ONE_MINUS_SRC_ALPHA

ONE_MINUS_DST_ALPHA

Set front and/or back function and reference value for

ONE_MINUS_SRC_COLOR

ONE_MINUS_DST_COLOR

stencil testing. Accepted values for face are:

ONE_MINUS_CONSTANT_COLOR

FRONT

BACK

FRONT_AND_BACK

ONE_MINUS_CONSTANT_ALPHA

stencilMask(

void

ulong mask )

In addition, sfactor can also be SRC_ALPHA_SATURATE

Control the front and back writing of individual bits in

blendFuncSeparate(

ulong srcRGB, ulong dstRGB,

void

the stencil planes.

ulong srcAlpha, ulong dstAlpha )

stencilMaskSeparate(

void

ulong face, ulong mask )

Specify pixel arithmetic for RGB and alpha components

Control the front and/or back writing of individual bits

separately.

in the stencil planes.

blendEquation(

ulong mode )

void

stencilOp(

void

ulong sfail, ulong dpfail, ulong dppass )

Specify the equation used for both the RGB blend

Set front and back stencil test actions. Accepted values

equation and the Alpha blend equation. Accepted

for sfail, dpfail and dppass are:

values for mode are:

KEEP

ZERO

INCR

INCR_WRAP

FUNC_ADD

FUNC_SUBTRACT

REPLACE

INVERT

DECR

DECR_WRAP

FUNC_REVERSE_SUBTRACT

stencilOpSeparate(

ulong face, ulong sfail,

void

blendEquationSeparate(

ulong modeRGB,

void

ulong dpfail, ulong dppass )

ulong modeAlpha )

Set front and/or back stencil test actions.

Set the RGB blend equation and the alpha blend

clearStencil(

long s )

void

equation separately.

Specify the clear value for the stencil buffer.

blendColor(

void

float red, float green,

getParameter(

any

ulong pname )

float blue, float alpha )

Relevant parameters:

Set the blend color

STENCIL_TEST

STENCIL_CLEAR_VALUE

getParameter(

any

ulong pname )

STENCIL_FUNC

STENCIL_FAIL

Relevant parameters:

STENCIL_REF

STENCIL_VALUE_MASK

BLEND

BLEND_COLOR

STENCIL_WRITEMASK

STENCIL_BACK_FUNC

BLEND_DST_RGB

BLEND_SRC_RGB

STENCIL_BACK_FAIL

STENCIL_BACK_REF

BLEND_DST_ALPHA

BLEND_SRC_ALPHA

STENCIL_BITS

STENCIL_BACK_WRITEMASK

BLEND_EQUATION_RGB

BLEND_EQUATION_ALPHA

STENCIL_BACK_VALUE_MASK

STENCIL_BACK_PASS_DEPTH_FAIL

Depth buffer

STENCIL_BACK_PASS_DEPTH_PASS

STENCIL_PASS_DEPTH_FAIL

enable|disable(

DEPTH_TEST )

void

STENCIL_PASS_DEPTH_PASS

Enable/disable depth testing.

depthFunc(

ulong func )

void

Array data

Specify the value used for depth buffer comparisons.

Parameter func is one of:

createFloatArray(

Array values )

Object

NEVER

LESS

EQUAL

LEQUAL

createByteArray(

Array values )

Object

GREATER

NOTEQUAL GEQUAL

ALWAYS

createUnsignedByteArray(

Array values )

Object

depthMask(

void

bool flag )

createShortArray(

Array values )

Object

Enable or disable writing into the depth buffer.

createUnsignedShortArray(

Object

Array values )

depthRange(

float nearVal, float farVal )

void

createIntArray(

Object

Array values )

Specify mapping of depth values from normalized

createUnsignedIntArray(

Object

Array values )

device coordinates to window coordinates.

Create WebGL array objects from JS arrays.

clearDepth(

float depth )

void

drawArrays(

void

ulong mode, long first, ulong count )

Specify the clear value for the depth buffer

Render primitives from array data. Accepted mode

enable|disable(

void

POLYGON_OFFSET_FILL )

values are:

Enable/disable polygon offset.

POINTS

LINES

LINE_LOOP

polygonOffset(

void

float factor, float units )

LINE_STRIP

TRIANGLES

TRIANGLE_STRIP

Set the scale and units used to calculate depth values.

TRIANGLE_FAN

getParameter(

ulong pname )

any

drawElements(

void

ulong mode, ulong count,

Relevant parameters:

ulong type, ulong offset )

DEPTH_TEST

DEPTH_RANGE

Render primitives from array data. Accepted type

DEPTH_WRITEMASK

DEPTH_CLEAR_VALUE

values are:

DEPTH_FUNC

DEPTH_BITS

UNSIGNED_BYTE

UNSIGNED_SHORT

POLYGON_OFFSET_UNITS POLYGON_OFFSET_FACTOR

Web Gl Cheat Sheet Page 3

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