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

Uniform variables

Multisampling

getUniformLocation(

enable|disable(

Object program, string name )

SAMPLE_COVERAGE )

ulong

void

Return the location of a uniform variable.

If enabled, the fragment's coverage is ANDed with the

getActiveUniform(

temporary coverage value.

Object

Object program, ulong idx )

enable|disable(

SAMPLE_ALPHA_TO_COVERAGE )

Return information about an active uniform variable.

void

Returns an object: { size: ..., type: ..., name: ... }.

If enabled, use the alpha value at the corresponding

getUniform(

sample location to determine each bit.

any

Object program, ulong location )

sampleCoverage(

float value, bool invert )

Return the value of a uniform variable

void

uniform[1234][if](

Specify multisample coverage parameters.

ulong location, ... )

void

getParameter(

ulong pname )

Specify 1-4 float or int values of a uniform variable.

any

uniform[1234][if]v(

ulong location, Array v )

Relevant parameters:

void

Specify the value of a uniform variable as an array of

SAMPLE_COVERAGE_VALUE

1-4 float or int values.

SAMPLE_COVERAGE_INVERT

uniformMatrix[234]fv(

ulong location,

void

SAMPLE_BUFFERS

bool transpose, Object value )

SAMPLES

Specify the value of a matrix uniform variable using

Misc.

arrays of float values.

getParameter(

any

ulong pname )

viewport(

void

long x, long y, ulong w, ulong h )

Relevant parameters:

Set the viewport.

MAX_VERTEX_UNIFORM_VECTORS

lineWidth(

float width )

void

MAX_FRAGMENT_UNIFORM_VECTORS

Specify the width of rasterized lines.

flush(

void

void )

Attribute variables

Force execution of GL commands in finite time.

getAttribLocation(

finish(

Object program, string name )

void )

ulong

void

Return the location of an attribute variable.

Block until all GL execution is complete.

getActiveAttrib(

clear(

Object program, ulong idx )

ulong mask )

Object

void

Return information about an active attribute variable.

Clear buffers to preset values, mask is the bitwise OR

Returns an object: { size: ..., type: ..., name: ... }.

of one or more of

getVertexAttrib(

Object idx, ulong pname )

any

COLOR_BUFFER_BIT

DEPTH_BUFFER_BIT

Return a generic vertex attribute parameter. Accepted

STENCIL_BUFFER_BIT

pname values are:

enable|disable(

DITHER )

void

VERTEX_ATTRIB_ARRAY_ENABLED

Enable/disable dithering of color comps or indices.

VERTEX_ATTRIB_ARRAY_SIZE

colorMask(

bool red, bool green,

void

VERTEX_ATTRIB_ARRAY_STRIDE

bool blue, bool alpha )

VERTEX_ATTRIB_ARRAY_TYPE

Enable and disable writing of frame buffer color

VERTEX_ATTRIB_ARRAY_NORMALIZED

components.

VERTEX_ATTRIB_ARRAY_BUFFER_BINDING

clearColor(

void

float red, float green,

CURRENT_VERTEX_ATTRIB

float blue, float alpha )

vertexAttribPointer(

ulong idx, long size,

void

Specify clear values for the color buffers.

ulong type, bool norm, long stride, ulong offset )

scissor(

long x, long y, ulong width, ulong height )

void

Define an array of generic vertex attribute data.

Define the scissor box.

Accepted type values are:

getError(

ulong

void )

FIXED

BYTE

UNSIGNED_BYTE

Return error information. Error values are:

FLOAT

SHORT

UNSIGNED_SHORT

OUT_OF_MEMORY

INVALID_ENUM

vertexAttrib[1234]f(

ulong idx, ... )

void

INVALID_VALUE

INVALID_OPERATION

INVALID_FRAMEBUFFER_OPERATION

Specify 1-4 float values of a generic vertex attribute.

vertexAttrib[1234]fv(

NO_ERROR

void

ulong idx, Array v )

Specify the value of a generic vertex attribute as an

getParameter(

ulong pname )

any

array of 1-4 float values.

Parameters values:

bindAttribLocation(

void

Object program, ulong idx,

VIEWPORT

string name )

MAX_VIEWPORT_DIMS

Associate a generic vertex attribute index with a

COLOR_CLEAR_VALUE

named attribute variable.

SCISSOR_BOX

enableVertexAttribArray(

ulong idx )

void

LINE_WIDTH

disableVertexAttribArray(

ulong idx )

void

ALIASED_POINT_SIZE_RANGE

Enable or disable a generic vertex attribute array

ALIASED_LINE_WIDTH_RANGE

getParameter(

ulong pname )

any

COLOR_WRITEMASK

Relevant parameters:

SUBPIXEL_BITS

MAX_VERTEX_ATTRIBS

Notes: [1] Not implemented in one or more browsers.

Sources: (2010-02-16)

(2009-10-23)

(2010-02-16)

Web Gl Cheat Sheet Page 4

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