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Add initial support for WebGL compressed textures

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This commit is contained in:
Mátyás Mustoha 2019-03-25 12:50:45 +01:00 • committed by Josh Matthews
parent a14b952fa3
commit 7f0b820d4e
16 changed files with 792 additions and 37 deletions
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46
components/canvas_traits/webgl.rs
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@ -331,6 +331,22 @@ pub enum WebGLCommand {
pixel_format: Option<PixelFormat>,
data: TruncatedDebug<IpcSharedMemory>,
},
CompressedTexImage2D {
target: u32,
level: u32,
internal_format: u32,
size: Size2D<u32>,
data: TruncatedDebug<IpcSharedMemory>,
},
CompressedTexSubImage2D {
target: u32,
level: i32,
xoffset: i32,
yoffset: i32,
size: Size2D<u32>,
format: u32,
data: TruncatedDebug<IpcSharedMemory>,
},
DrawingBufferWidth(WebGLSender<i32>),
DrawingBufferHeight(WebGLSender<i32>),
Finish(WebGLSender<()>),
@ -736,6 +752,25 @@ macro_rules! gl_enums {
}
}
// FIXME: These should come from gleam
mod gl_ext_constants {
use gleam::gl::types::GLenum;
pub const COMPRESSED_RGB_S3TC_DXT1_EXT: GLenum = 0x83F0;
pub const COMPRESSED_RGBA_S3TC_DXT1_EXT: GLenum = 0x83F1;
pub const COMPRESSED_RGBA_S3TC_DXT3_EXT: GLenum = 0x83F2;
pub const COMPRESSED_RGBA_S3TC_DXT5_EXT: GLenum = 0x83F3;
pub const COMPRESSED_RGB_ETC1_WEBGL: GLenum = 0x8D64;
pub static COMPRESSIONS: &'static [GLenum] = &[
COMPRESSED_RGB_S3TC_DXT1_EXT,
COMPRESSED_RGBA_S3TC_DXT1_EXT,
COMPRESSED_RGBA_S3TC_DXT3_EXT,
COMPRESSED_RGBA_S3TC_DXT5_EXT,
COMPRESSED_RGB_ETC1_WEBGL,
];
}
gl_enums! {
pub enum TexFormat {
DepthComponent = gl::DEPTH_COMPONENT,
@ -744,6 +779,11 @@ gl_enums! {
RGBA = gl::RGBA,
Luminance = gl::LUMINANCE,
LuminanceAlpha = gl::LUMINANCE_ALPHA,
CompressedRgbS3tcDxt1 = gl_ext_constants::COMPRESSED_RGB_S3TC_DXT1_EXT,
CompressedRgbaS3tcDxt1 = gl_ext_constants::COMPRESSED_RGBA_S3TC_DXT1_EXT,
CompressedRgbaS3tcDxt3 = gl_ext_constants::COMPRESSED_RGBA_S3TC_DXT3_EXT,
CompressedRgbaS3tcDxt5 = gl_ext_constants::COMPRESSED_RGBA_S3TC_DXT5_EXT,
CompressedRgbEtc1 = gl_ext_constants::COMPRESSED_RGB_ETC1_WEBGL,
}
pub enum TexDataType {
@ -767,8 +807,14 @@ impl TexFormat {
TexFormat::LuminanceAlpha => 2,
TexFormat::RGB => 3,
TexFormat::RGBA => 4,
_ => 1,
}
}
/// Returns whether this format is a known texture compression format.
pub fn is_compressed(&self) -> bool {
gl_ext_constants::COMPRESSIONS.contains(&self.as_gl_constant())
}
}
impl TexDataType {