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webgl: Refactor texture validations to take advantage of rust type system

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This commit introduces the `WebGLValidator` trait, and uses it for multiple
validations in the texture-related WebGL code, to move that logic out of the
already bloated `webglrenderingcontext.rs` file.

It also creates a type-safe wrapper for some WebGL types, removing all the
`unreachable!`s there, and introduces a macro for generating them conveniently.

This partially addresses #10693, pending refactor more code to use this
infrastructure, and (possibly?) introducing an `AsGLError` trait for the errors
to make the error handling happen in `WebGLContext`.
This commit is contained in:
Emilio Cobos Álvarez 2016-06-12 00:16:27 +02:00
parent 8d81ee77a8
commit 46c14aced2
No known key found for this signature in database
GPG key ID: 056B727BB9C1027C
7 changed files with 706 additions and 420 deletions
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591
components/script/dom/webglrenderingcontext.rs
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@ -18,6 +18,10 @@ use dom::event::{Event, EventBubbles, EventCancelable};
use dom::htmlcanvaselement::HTMLCanvasElement;
use dom::htmlcanvaselement::utils as canvas_utils;
use dom::node::{Node, NodeDamage, window_from_node};
use dom::webgl_validations::WebGLValidator;
use dom::webgl_validations::tex_image_2d::{CommonTexImage2DValidator, CommonTexImage2DValidatorResult};
use dom::webgl_validations::tex_image_2d::{TexImage2DValidator, TexImage2DValidatorResult};
use dom::webgl_validations::types::{TexFormat, TexImageTarget, TexDataType};
use dom::webglactiveinfo::WebGLActiveInfo;
use dom::webglbuffer::WebGLBuffer;
use dom::webglcontextevent::WebGLContextEvent;
@ -88,10 +92,6 @@ pub struct WebGLRenderingContext {
current_vertex_attrib_0: Cell<(f32, f32, f32, f32)>,
}
fn log2(n: u32) -> u32 {
31 - n.leading_zeros()
}
impl WebGLRenderingContext {
fn new_inherited(global: GlobalRef,
canvas: &HTMLCanvasElement,
@ -141,6 +141,22 @@ impl WebGLRenderingContext {
}
}
pub fn limits(&self) -> &GLLimits {
&self.limits
}
pub fn bound_texture_for_target(&self, target: &TexImageTarget) -> Option<Root<WebGLTexture>> {
match *target {
TexImageTarget::Texture2D => self.bound_texture_2d.get(),
TexImageTarget::CubeMapPositiveX |
TexImageTarget::CubeMapNegativeX |
TexImageTarget::CubeMapPositiveY |
TexImageTarget::CubeMapNegativeY |
TexImageTarget::CubeMapPositiveZ |
TexImageTarget::CubeMapNegativeZ => self.bound_texture_cube_map.get(),
}
}
pub fn recreate(&self, size: Size2D<i32>) {
self.ipc_renderer.send(CanvasMsg::Common(CanvasCommonMsg::Recreate(size))).unwrap();
}
@ -239,31 +255,6 @@ impl WebGLRenderingContext {
true
}
fn texture_for_target(&self, target: u32) -> Option<Root<WebGLTexture>> {
match target {
constants::TEXTURE_2D => self.bound_texture_2d.get(),
constants::TEXTURE_CUBE_MAP_POSITIVE_X | constants::TEXTURE_CUBE_MAP_NEGATIVE_X |
constants::TEXTURE_CUBE_MAP_POSITIVE_Y | constants::TEXTURE_CUBE_MAP_NEGATIVE_Y |
constants::TEXTURE_CUBE_MAP_POSITIVE_Z | constants::TEXTURE_CUBE_MAP_NEGATIVE_Z => {
self.bound_texture_cube_map.get()
},
_ => None,
}
}
fn face_index_for_target(&self, target: u32) -> Option<u8> {
match target {
constants::TEXTURE_2D => Some(0),
constants::TEXTURE_CUBE_MAP_POSITIVE_X => Some(0),
constants::TEXTURE_CUBE_MAP_NEGATIVE_X => Some(1),
constants::TEXTURE_CUBE_MAP_POSITIVE_Y => Some(2),
constants::TEXTURE_CUBE_MAP_NEGATIVE_Y => Some(3),
constants::TEXTURE_CUBE_MAP_POSITIVE_Z => Some(4),
constants::TEXTURE_CUBE_MAP_NEGATIVE_Z => Some(5),
_ => None
}
}
fn get_image_pixels(&self,
source: Option<ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement>)
-> ImagePixelResult {
@ -331,68 +322,18 @@ impl WebGLRenderingContext {
return Ok((pixels, size));
}
fn validate_tex_internal_format(&self, internal_format: u32) -> bool {
// GL_INVALID_VALUE is generated if internal_format is not an
// accepted format.
match internal_format {
constants::DEPTH_COMPONENT |
constants::ALPHA |
constants::RGB |
constants::RGBA |
constants::LUMINANCE |
constants::LUMINANCE_ALPHA => true,
_ => {
self.webgl_error(InvalidValue);
false
},
}
}
fn validate_tex_format(&self, format: u32) -> bool {
// GL_INVALID_VALUE is generated if internal_format is not an
// accepted format.
match format {
constants::DEPTH_COMPONENT |
constants::ALPHA |
constants::RGB |
constants::RGBA |
constants::LUMINANCE |
constants::LUMINANCE_ALPHA => true,
_ => {
self.webgl_error(InvalidEnum);
false
},
}
}
// TODO(emilio): Move this logic to a validator.
#[allow(unsafe_code)]
fn validate_tex_image_2d_data(&self,
width: i32,
height: i32,
format: u32,
data_type: u32,
width: u32,
height: u32,
format: TexFormat,
data_type: TexDataType,
data: Option<*mut JSObject>)
-> Result<i32, ()> {
// TODO(emilio, #10693): Add type-safe wrappers to validations
let (element_size, components_per_element) = match data_type {
constants::UNSIGNED_BYTE => (1, 1),
constants::UNSIGNED_SHORT_5_6_5 => (2, 3),
constants::UNSIGNED_SHORT_5_5_5_1 |
constants::UNSIGNED_SHORT_4_4_4_4 => (2, 4),
_ => unreachable!(), // previously validated
};
let components = match format {
constants::DEPTH_COMPONENT => 1,
constants::ALPHA => 1,
constants::LUMINANCE => 1,
constants::LUMINANCE_ALPHA => 2,
constants::RGB => 3,
constants::RGBA => 4,
_ => unreachable!(), // previously validated
};
-> Result<u32, ()> {
let element_size = data_type.element_size();
let components_per_element = data_type.components_per_element();
let components = format.components();
// If data is non-null, the type of pixels must match the type of the
// data to be read.
@ -423,178 +364,18 @@ impl WebGLRenderingContext {
return Ok(expected_byte_length);
}
fn validate_tex_image_2d_parameters(&self,
target: u32,
level: i32,
internal_format: u32,
width: i32,
height: i32,
border: i32,
format: u32,
data_type: u32) -> bool {
// Validate common tex image parameters
if !self.validate_common_tex_image_parameters(target, level, width, height) {
return false;
}
// GL_INVALID_ENUM is generated if data_type is not an accepted value.
match data_type {
constants::UNSIGNED_BYTE |
constants::UNSIGNED_SHORT_4_4_4_4 |
constants::UNSIGNED_SHORT_5_5_5_1 |
constants::UNSIGNED_SHORT_5_6_5 => {},
_ => {
self.webgl_error(InvalidEnum);
return false;
},
}
// Validate format
if !self.validate_tex_format(format) {
return false;
}
// Validate internal_format
if !self.validate_tex_internal_format(internal_format) {
return false;
}
// GL_INVALID_OPERATION is generated if format does not
// match internal_format.
if format != internal_format {
self.webgl_error(InvalidOperation);
return false;
}
// GL_INVALID_VALUE is generated if border is not 0.
if border != 0 {
self.webgl_error(InvalidValue);
return false;
}
// GL_INVALID_OPERATION is generated if type is GL_UNSIGNED_SHORT_4_4_4_4 or
// GL_UNSIGNED_SHORT_5_5_5_1 and format is not GL_RGBA.
//
// GL_INVALID_OPERATION is generated if type is
// GL_UNSIGNED_SHORT_5_6_5 and format is not GL_RGB.
match data_type {
constants::UNSIGNED_SHORT_4_4_4_4 |
constants::UNSIGNED_SHORT_5_5_5_1 if format != constants::RGBA => {
self.webgl_error(InvalidOperation);
return false;
},
constants::UNSIGNED_SHORT_5_6_5 if format != constants::RGB => {
self.webgl_error(InvalidOperation);
return false;
},
_ => {},
}
true
}
fn validate_common_tex_image_parameters(&self,
target: u32,
level: i32,
width: i32,
height: i32) -> bool {
// GL_INVALID_ENUM is generated if target is not GL_TEXTURE_2D,
// GL_TEXTURE_CUBE_MAP_POSITIVE_X, GL_TEXTURE_CUBE_MAP_NEGATIVE_X,
// GL_TEXTURE_CUBE_MAP_POSITIVE_Y, GL_TEXTURE_CUBE_MAP_NEGATIVE_Y,
// GL_TEXTURE_CUBE_MAP_POSITIVE_Z, or GL_TEXTURE_CUBE_MAP_NEGATIVE_Z.
//
// max_size is GL_MAX_TEXTURE_SIZE when target is GL_TEXTURE_2D or
// GL_MAX_CUBE_MAP_TEXTURE_SIZE when target is not GL_TEXTURE_2D.
let (texture, max) = match target {
constants::TEXTURE_2D
=> (self.bound_texture_2d.get(), self.limits.max_tex_size),
constants::TEXTURE_CUBE_MAP_POSITIVE_X |
constants::TEXTURE_CUBE_MAP_NEGATIVE_X |
constants::TEXTURE_CUBE_MAP_POSITIVE_Y |
constants::TEXTURE_CUBE_MAP_NEGATIVE_Y |
constants::TEXTURE_CUBE_MAP_POSITIVE_Z |
constants::TEXTURE_CUBE_MAP_NEGATIVE_Z
=> (self.bound_texture_cube_map.get(), self.limits.max_cube_map_tex_size),
_ => {
self.webgl_error(InvalidEnum);
return false;
},
};
// If an attempt is made to call this function with no
// WebGLTexture bound, an INVALID_OPERATION error is generated.
if texture.is_none() {
self.webgl_error(InvalidOperation);
return false;
}
let is_cubic = target != constants::TEXTURE_2D;
// GL_INVALID_VALUE is generated if target is one of the
// six cube map 2D image targets and the width and height
// parameters are not equal.
if is_cubic && width != height {
self.webgl_error(InvalidValue);
return false;
}
// GL_INVALID_VALUE is generated if level is less than 0.
//
// GL_INVALID_VALUE is generated if width or height is less than 0
if width < 0 || height < 0 || level < 0 ||
width as u32 > max || height as u32 > max {
self.webgl_error(InvalidValue);
return false;
}
// GL_INVALID_VALUE may be generated if
// level is greater than log_2(max), where max is
// the returned value of GL_MAX_TEXTURE_SIZE when
// target is GL_TEXTURE_2D or GL_MAX_CUBE_MAP_TEXTURE_SIZE
// when target is not GL_TEXTURE_2D.
if level > log2(max) as i32 {
self.webgl_error(InvalidValue);
return false;
}
// GL_INVALID_VALUE is generated if level is greater than zero and the
// texture is not power of two.
if level > 0 &&
(!(width as u32).is_power_of_two() ||
!(height as u32).is_power_of_two()) {
self.webgl_error(InvalidValue);
return false;
}
true
}
fn tex_image_2d(&self,
target: u32,
level: i32,
internal_format: u32,
width: i32,
height: i32,
border: i32,
format: u32,
data_type: u32,
texture: Root<WebGLTexture>,
target: TexImageTarget,
data_type: TexDataType,
internal_format: TexFormat,
level: u32,
width: u32,
height: u32,
_border: u32,
pixels: Vec<u8>) { // NB: pixels should NOT be premultipied
// This should be validated before reaching this function
debug_assert!(self.validate_tex_image_2d_parameters(target, level,
internal_format,
width, height,
border, format,
data_type));
let slot = match target {
constants::TEXTURE_2D
=> self.bound_texture_2d.get(),
_ => self.bound_texture_cube_map.get(),
};
let texture = slot.as_ref().expect("No bound texture found after validation");
if format == constants::RGBA &&
data_type == constants::UNSIGNED_BYTE &&
if internal_format == TexFormat::RGBA &&
data_type == TexDataType::UnsignedByte &&
self.texture_unpacking_settings.get().contains(PREMULTIPLY_ALPHA) {
// TODO(emilio): premultiply here.
}
@ -603,15 +384,18 @@ impl WebGLRenderingContext {
// TexImage2D depth is always equal to 1
handle_potential_webgl_error!(self, texture.initialize(target,
width as u32,
height as u32, 1,
width,
height, 1,
internal_format,
level as u32,
level,
Some(data_type)));
// TODO(emilio): Invert axis, convert colorspace, premultiply alpha if requested
let msg = WebGLCommand::TexImage2D(target, level, internal_format as i32,
width, height, format, data_type, pixels);
let msg = WebGLCommand::TexImage2D(target.as_gl_constant(), level as i32,
internal_format.as_gl_constant() as i32,
width as i32, height as i32,
internal_format.as_gl_constant(),
data_type.as_gl_constant(), pixels);
self.ipc_renderer
.send(CanvasMsg::WebGL(msg))
@ -619,54 +403,29 @@ impl WebGLRenderingContext {
}
fn tex_sub_image_2d(&self,
target: u32,
level: i32,
texture: Root<WebGLTexture>,
target: TexImageTarget,
level: u32,
xoffset: i32,
yoffset: i32,
width: i32,
height: i32,
format: u32,
data_type: u32,
width: u32,
height: u32,
format: TexFormat,
data_type: TexDataType,
pixels: Vec<u8>) { // NB: pixels should NOT be premultipied
// This should be validated before reaching this function
debug_assert!(self.validate_tex_image_2d_parameters(target, level,
format,
width, height,
0, format,
data_type));
let slot = match target {
constants::TEXTURE_2D
=> self.bound_texture_2d.get(),
constants::TEXTURE_CUBE_MAP
=> self.bound_texture_cube_map.get(),
_ => return self.webgl_error(InvalidEnum),
};
let texture = slot.as_ref().expect("No bound texture found after validation");
if format == constants::RGBA &&
data_type == constants::UNSIGNED_BYTE &&
self.texture_unpacking_settings.get().contains(PREMULTIPLY_ALPHA) {
// TODO(emilio): premultiply here.
}
// We have already validated level
let face_index = self.face_index_for_target(target).unwrap();
let image_info = texture.image_info_at_face(face_index, level as u32);
let image_info = texture.image_info_for_target(&target, level);
// GL_INVALID_VALUE is generated if:
// - xoffset or yoffset is less than 0
// - x offset plus the width is greater than the texture width
// - y offset plus the height is greater than the texture height
if xoffset < 0 || ((xoffset + width) as u32) > image_info.width() ||
yoffset < 0 || ((yoffset + height) as u32) > image_info.height() {
if xoffset < 0 || (xoffset as u32 + width) > image_info.width() ||
yoffset < 0 || (yoffset as u32 + height) > image_info.height() {
return self.webgl_error(InvalidValue);
}
// Using internal_format() to do this check
// because we are sure format is as same as internal_format.
// NB: format and internal_format must match.
if format != image_info.internal_format().unwrap() ||
data_type != image_info.data_type().unwrap() {
return self.webgl_error(InvalidOperation);
@ -675,8 +434,11 @@ impl WebGLRenderingContext {
// TODO(emilio): Flip Y axis if necessary here
// TODO(emilio): Invert axis, convert colorspace, premultiply alpha if requested
let msg = WebGLCommand::TexSubImage2D(target, level, xoffset, yoffset,
width, height, format, data_type, pixels);
let msg = WebGLCommand::TexSubImage2D(target.as_gl_constant(),
level as i32, xoffset, yoffset,
width as i32, height as i32,
format.as_gl_constant(),
data_type.as_gl_constant(), pixels);
self.ipc_renderer
.send(CanvasMsg::WebGL(msg))
@ -1058,43 +820,39 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CopyTexImage2D(&self, target: u32, level: i32, internal_format: u32,
x: i32, y: i32, width: i32, height: i32, border: i32) {
// Validate common tex image parameters
if !self.validate_common_tex_image_parameters(target, level, width, height) ||
!self.validate_tex_internal_format(internal_format) {
return;
}
// GL_INVALID_VALUE is generated if the border is not 0
if border != 0 {
self.webgl_error(InvalidValue);
return;
}
let texture = self.texture_for_target(target).unwrap();
let face_index = self.face_index_for_target(target).unwrap();
// We have already validated level
let image_info = texture.image_info_at_face(face_index, level as u32);
// The color buffer components can be dropped during the conversion to the
// internal_format, but new components cannot be added
let invalid_format = match image_info.internal_format() {
Some(src_format) => match (src_format, internal_format) {
(constants::ALPHA, constants::ALPHA) | (constants::RGB, constants::RGB) |
(constants::RGB, constants::LUMINANCE) | (constants::RGBA, _) => false,
_ => true,
},
None => false,
let validator = CommonTexImage2DValidator::new(self, target, level,
internal_format, width,
height, border);
let CommonTexImage2DValidatorResult {
texture,
target,
level,
internal_format,
width,
height,
border,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return,
};
let image_info = texture.image_info_for_target(&target, level);
// The color buffer components can be dropped during the conversion to
// the internal_format, but new components cannot be added.
//
// Note that this only applies if we're copying to an already
// initialized texture.
//
// GL_INVALID_OPERATION is generated if the color buffer cannot be
// converted to the internal_format
if invalid_format {
self.webgl_error(InvalidOperation);
return;
// converted to the internal_format.
if let Some(old_internal_format) = image_info.internal_format() {
if old_internal_format.components() > internal_format.components() {
return self.webgl_error(InvalidOperation);
}
}
// TexImage2D depth is always equal to 1
// NB: TexImage2D depth is always equal to 1
handle_potential_webgl_error!(self, texture.initialize(target,
width as u32,
height as u32, 1,
@ -1102,8 +860,12 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
level as u32,
None));
let msg = WebGLCommand::CopyTexImage2D(target, level, internal_format, x, y,
width, height, border);
let msg = WebGLCommand::CopyTexImage2D(target.as_gl_constant(),
level as i32,
internal_format.as_gl_constant(),
x, y,
width as i32, height as i32,
border as i32);
self.ipc_renderer.send(CanvasMsg::WebGL(msg)).unwrap()
}
@ -1111,29 +873,39 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
fn CopyTexSubImage2D(&self, target: u32, level: i32, xoffset: i32, yoffset: i32,
x: i32, y: i32, width: i32, height: i32) {
// Validate common tex image parameters
if !self.validate_common_tex_image_parameters(target, level, width, height) {
return;
}
// NB: We use a dummy (valid) format and border in order to reuse the
// common validations, but this should have its own validator.
let validator = CommonTexImage2DValidator::new(self, target, level,
TexFormat::RGBA.as_gl_constant(),
width, height, 0);
let CommonTexImage2DValidatorResult {
texture,
target,
level,
width,
height,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return,
};
let texture = self.texture_for_target(target).unwrap();
let face_index = self.face_index_for_target(target).unwrap();
// We have already validated level
let image_info = texture.image_info_at_face(face_index, level as u32);
let image_info = texture.image_info_for_target(&target, level);
// GL_INVALID_VALUE is generated if:
// - xoffset or yoffset is less than 0
// - x offset plus the width is greater than the texture width
// - y offset plus the height is greater than the texture height
if xoffset < 0 || ((xoffset + width) as u32) > image_info.width() ||
yoffset < 0 || ((yoffset + height) as u32) > image_info.height() {
if xoffset < 0 || (xoffset as u32 + width) > image_info.width() ||
yoffset < 0 || (yoffset as u32 + height) > image_info.height() {
self.webgl_error(InvalidValue);
return;
}
let msg = WebGLCommand::CopyTexSubImage2D(target, level, xoffset, yoffset,
x, y, width, height);
let msg = WebGLCommand::CopyTexSubImage2D(target.as_gl_constant(),
level as i32, xoffset, yoffset,
x, y,
width as i32, height as i32);
self.ipc_renderer.send(CanvasMsg::WebGL(msg)).unwrap();
}
@ -2104,15 +1876,23 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
format: u32,
data_type: u32,
data: Option<*mut JSObject>) {
if !self.validate_tex_image_2d_parameters(target,
level,
internal_format,
width, height,
border,
format,
data_type) {
return; // Error handled in validate()
}
let validator = TexImage2DValidator::new(self, target, level,
internal_format, width, height,
border, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
border,
format,
data_type,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return, // NB: The validator sets the correct error for us.
};
let expected_byte_length = match self.validate_tex_image_2d_data(width,
height,
@ -2136,10 +1916,8 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
return self.webgl_error(InvalidOperation);
}
self.tex_image_2d(target, level,
internal_format,
width, height, border,
format, data_type, buff)
self.tex_image_2d(texture, target, data_type, format,
level, width, height, border, buff)
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
@ -2156,17 +1934,28 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
Err(_) => return,
};
// NB: Border must be zero
if !self.validate_tex_image_2d_parameters(target, level, internal_format,
size.width, size.height, 0,
format, data_type) {
return; // Error handled in validate()
}
self.tex_image_2d(target, level,
internal_format,
size.width, size.height, 0,
format, data_type, pixels);
let validator = TexImage2DValidator::new(self,
target, level, internal_format,
size.width, size.height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
border,
format,
data_type,
} = match validator.validate() {
Ok(result) => result,
Err(_) => return, // NB: The validator sets the correct error for us.
};
self.tex_image_2d(texture, target, data_type, format,
level, width, height, border, pixels);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
@ -2181,15 +1970,22 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
format: u32,
data_type: u32,
data: Option<*mut JSObject>) {
if !self.validate_tex_image_2d_parameters(target,
level,
format,
width, height,
0,
format,
data_type) {
return; // Error handled in validate()
}
let validator = TexImage2DValidator::new(self, target, level,
format, width, height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
format,
data_type,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return, // NB: The validator sets the correct error for us.
};
let expected_byte_length = match self.validate_tex_image_2d_data(width,
height,
@ -2214,10 +2010,8 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
return self.webgl_error(InvalidOperation);
}
self.tex_sub_image_2d(target, level,
xoffset, yoffset,
width, height,
format, data_type, buff);
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, buff);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8
@ -2229,23 +2023,30 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
format: u32,
data_type: u32,
source: Option<ImageDataOrHTMLImageElementOrHTMLCanvasElementOrHTMLVideoElement>) {
// Get pixels from image source
let (pixels, size) = match self.get_image_pixels(source) {
Ok((pixels, size)) => (pixels, size),
Err(_) => return,
};
// NB: Border must be zero
if !self.validate_tex_image_2d_parameters(target, level, format,
size.width, size.height, 0,
format, data_type) {
return; // Error handled in validate()
}
let validator = TexImage2DValidator::new(self, target, level, format,
size.width, size.height,
0, format, data_type);
let TexImage2DValidatorResult {
texture,
target,
width,
height,
level,
format,
data_type,
..
} = match validator.validate() {
Ok(result) => result,
Err(_) => return, // NB: The validator sets the correct error for us.
};
self.tex_sub_image_2d(target, level,
xoffset, yoffset,
size.width, size.height,
format, data_type, pixels);
self.tex_sub_image_2d(texture, target, level, xoffset, yoffset,
width, height, format, data_type, pixels);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.8