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Merge code from Draw* and Draw*Instanced methods

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This made me realise we weren't supporting OES_element_index_uint in the
ANGLE_instanced_arrays extension.
This commit is contained in:
Anthony Ramine 2018-08-02 22:54:39 +02:00
parent c5aaae7333
commit 04c81c5cc3
3 changed files with 30 additions and 128 deletions
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144
components/script/dom/webglrenderingcontext.rs
View file

@ -1180,9 +1180,15 @@ impl WebGLRenderingContext {
return;
}
self.send_command(
WebGLCommand::DrawArraysInstanced { mode, first, count, primcount },
);
if count == 0 || primcount == 0 {
return;
}
self.send_command(if primcount == 1 {
WebGLCommand::DrawArrays { mode, first, count }
} else {
WebGLCommand::DrawArraysInstanced { mode, first, count, primcount }
});
self.mark_as_dirty();
}
@ -1210,6 +1216,7 @@ impl WebGLRenderingContext {
let type_size = match type_ {
constants::UNSIGNED_BYTE => 1,
constants::UNSIGNED_SHORT => 2,
constants::UNSIGNED_INT if self.extension_manager.is_element_index_uint_enabled() => 4,
_ => return self.webgl_error(InvalidEnum),
};
if offset % type_size != 0 {
@ -1224,17 +1231,12 @@ impl WebGLRenderingContext {
if count > 0 && primcount > 0 {
if let Some(array_buffer) = self.current_vao().element_array_buffer().get() {
// WebGL Spec: check buffer overflows, must be a valid multiple of the size.
// This operation cannot overflow in u64 and we know all those values are nonnegative.
let val = offset as u64 + (count as u64 * type_size as u64);
if val > array_buffer.capacity() as u64 {
return self.webgl_error(InvalidOperation);
}
} else {
// From the WebGL spec
//
// a non-null WebGLBuffer must be bound to the ELEMENT_ARRAY_BUFFER binding point
// or an INVALID_OPERATION error will be generated.
//
return self.webgl_error(InvalidOperation);
}
}
@ -1250,12 +1252,15 @@ impl WebGLRenderingContext {
return;
}
self.send_command(WebGLCommand::DrawElementsInstanced {
mode,
count,
type_,
offset: offset as u32,
primcount,
if count == 0 || primcount == 0 {
return;
}
let offset = offset as u32;
self.send_command(if primcount == 1 {
WebGLCommand::DrawElements { mode, count, type_, offset }
} else {
WebGLCommand::DrawElementsInstanced { mode, count, type_, offset, primcount }
});
self.mark_as_dirty();
}
@ -2411,117 +2416,12 @@ impl WebGLRenderingContextMethods for WebGLRenderingContext {
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn DrawArrays(&self, mode: u32, first: i32, count: i32) {
match mode {
constants::POINTS | constants::LINE_STRIP |
constants::LINE_LOOP | constants::LINES |
constants::TRIANGLE_STRIP | constants::TRIANGLE_FAN |
constants::TRIANGLES => {},
_ => {
return self.webgl_error(InvalidEnum);
}
}
if first < 0 || count < 0 {
return self.webgl_error(InvalidValue);
}
let current_program = handle_potential_webgl_error!(
self,
self.current_program.get().ok_or(InvalidOperation),
return
);
let required_len = if count > 0 {
handle_potential_webgl_error!(
self,
first.checked_add(count).map(|len| len as u32).ok_or(InvalidOperation),
return
)
} else {
0
};
handle_potential_webgl_error!(
self,
self.current_vao().validate_for_draw(required_len, 1, &current_program.active_attribs()),
return
);
if !self.validate_framebuffer_complete() {
return;
}
self.send_command(WebGLCommand::DrawArrays(mode, first, count));
self.mark_as_dirty();
self.draw_arrays_instanced(mode, first, count, 1);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.11
fn DrawElements(&self, mode: u32, count: i32, type_: u32, offset: i64) {
match mode {
constants::POINTS | constants::LINE_STRIP |
constants::LINE_LOOP | constants::LINES |
constants::TRIANGLE_STRIP | constants::TRIANGLE_FAN |
constants::TRIANGLES => {},
_ => return self.webgl_error(InvalidEnum),
}
// From the GLES 2.0.25 spec, page 21:
//
// "type must be one of UNSIGNED_BYTE or UNSIGNED_SHORT"
let type_size = match type_ {
constants::UNSIGNED_BYTE => 1,
constants::UNSIGNED_SHORT => 2,
constants::UNSIGNED_INT if self.extension_manager.is_element_index_uint_enabled() => 4,
_ => return self.webgl_error(InvalidEnum),
};
if offset % type_size != 0 {
return self.webgl_error(InvalidOperation);
}
if count < 0 {
return self.webgl_error(InvalidValue);
}
if offset < 0 {
return self.webgl_error(InvalidValue);
}
let current_program = handle_potential_webgl_error!(
self,
self.current_program.get().ok_or(InvalidOperation),
return
);
if count > 0 {
if let Some(array_buffer) = self.current_vao().element_array_buffer().get() {
// WebGL Spec: check buffer overflows, must be a valid multiple of the size.
let val = offset as u64 + (count as u64 * type_size as u64);
if val > array_buffer.capacity() as u64 {
return self.webgl_error(InvalidOperation);
}
} else {
// From the WebGL spec
//
// a non-null WebGLBuffer must be bound to the ELEMENT_ARRAY_BUFFER binding point
// or an INVALID_OPERATION error will be generated.
//
return self.webgl_error(InvalidOperation);
}
}
// TODO(nox): Pass the correct number of vertices required.
handle_potential_webgl_error!(
self,
self.current_vao().validate_for_draw(0, 1, &current_program.active_attribs()),
return
);
if !self.validate_framebuffer_complete() {
return;
}
self.send_command(WebGLCommand::DrawElements(mode, count, type_, offset));
self.mark_as_dirty();
self.draw_elements_instanced(mode, count, type_, offset, 1);
}
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#5.14.10