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Add support for WebGL2 MIN_PROGRAM_TEXEL_OFFSET

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Improves the support of the WebGL2 `MIN_PROGRAM_TEXEL_OFFSET` property
(ie. stores it as a signed integer) and adds support for querying it
using GetParameter.

See: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.2
This commit is contained in:
Mátyás Mustoha 2020-04-28 10:00:14 +02:00
parent ff33b88f72
commit 1431a389da
4 changed files with 14 additions and 8 deletions
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11
components/canvas/webgl_limits.rs
View file

@ -95,7 +95,7 @@ impl GLLimitsDetect for GLLimits {
if webgl_version == WebGLVersion::WebGL2 {
max_uniform_block_size = gl.get_integer64(gl::MAX_UNIFORM_BLOCK_SIZE);
max_uniform_buffer_bindings = gl.get_integer(gl::MAX_UNIFORM_BUFFER_BINDINGS);
min_program_texel_offset = gl.get_integer(gl::MIN_PROGRAM_TEXEL_OFFSET);
min_program_texel_offset = gl.get_signed_integer(gl::MIN_PROGRAM_TEXEL_OFFSET);
max_program_texel_offset = gl.get_integer(gl::MAX_PROGRAM_TEXEL_OFFSET);
max_transform_feedback_separate_attribs =
gl.get_integer(gl::MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS);
@ -206,9 +206,11 @@ impl GLLimitsDetect for GLLimits {
trait GLExt {
fn try_get_integer(self, parameter: GLenum) -> Option<u32>;
fn try_get_integer64(self, parameter: GLenum) -> Option<u64>;
fn try_get_signed_integer(self, parameter: GLenum) -> Option<i32>;
fn try_get_float(self, parameter: GLenum) -> Option<f32>;
fn get_integer(self, parameter: GLenum) -> u32;
fn get_integer64(self, parameter: GLenum) -> u64;
fn get_signed_integer(self, parameter: GLenum) -> i32;
fn get_float(self, parameter: GLenum) -> f32;
}
@ -236,5 +238,12 @@ macro_rules! create_fun {
impl<'a> GLExt for &'a Gl {
create_fun!(try_get_integer, get_integer, i32, get_integer_v, u32);
create_fun!(try_get_integer64, get_integer64, i64, get_integer64_v, u64);
create_fun!(
try_get_signed_integer,
get_signed_integer,
i32,
get_integer_v,
i32
);
create_fun!(try_get_float, get_float, f32, get_float_v, f32);
}