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Text rendering with glium

Rust 100.00%

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glium_text's Issues

bump to glium 0.27.0?

title says all.

FontTexture::new(..) is very very slow when load CJK font

Example font: https://github.com/adobe-fonts/source-han-sans/
There are a large number of Unicode characters, they do not require all converted Texture. This will block the process tens of seconds.
Perhaps we should render the texture in TextDisply::new(..), like SDL_ttf.
I will try to do this

Cannot render with custom DrawParameters

glium_text::draw() uses Default::default() to instantiate new DrawParameters on every call. This seems both inefficient and very inflexible.

Does not compile with old glium

Compiling the unchanged git clone gives errors about different types in glutin 0.3.7:

% cargo build
    Updating registry `https://github.com/rust-lang/crates.io-index`
   Compiling glutin v0.3.7
   Compiling image v0.3.15
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/osmesa/mod.rs:82:63: 83:69 error: mismatched types:
 expected `*mut libc::c_void`,
    found `*mut libc::types::common::c95::c_void`
(expected enum `libc::c_void`,
    found enum `libc::types::common::c95::c_void`) [E0308]
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/osmesa/mod.rs:82         let ret = osmesa_sys::OSMesaMakeCurrent(self.context, self.buffer.as_ptr()
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/osmesa/mod.rs:83                                                 as *mut libc::c_void, 0x1401, self.width
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/osmesa/mod.rs:82:63: 83:69 help: run `rustc --explain E0308` to see a detailed explanation
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/x11/window.rs:517:38: 517:63 error: mismatched types:
 expected `*mut libc::c_void`,
    found `*mut libc::types::common::c95::c_void`
(expected enum `libc::c_void`,
    found enum `libc::types::common::c95::c_void`) [E0308]
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/x11/window.rs:517                 (display.xlib.XFree)(hint as *mut libc::c_void);
                                                                                                                                                                     ^~~~~~~~~~~~~~~~~~~~~~~~~
/home/daniel/.multirust/toolchains/stable/cargo/registry/src/github.com-121aea75f9ef2ce2/glutin-0.3.7/src/api/x11/window.rs:517:38: 517:63 help: run `rustc --explain E0308` to see a detailed explanation
error: aborting due to 2 previous errors

Bumping the versions to the latest crates seems to fix the problem:

diff --git a/Cargo.toml b/Cargo.toml
index d0351e3..b2ad520 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,11 +7,11 @@ keywords = ["text", "opengl"]
 license = "MIT"

 [dependencies]
-freetype-sys = "0.1"
-libc = "0.1"
+freetype-sys = "0.2"
+libc = "0.2"

 [dependencies.glium]
-version = "0.9"
+version = "0.12"
 default-features = false
 features = ["cgmath"]

@@ -19,5 +19,5 @@ features = ["cgmath"]
 cgmath = "0.2"

 [dev-dependencies.glium]
-version = "0.9"
+version = "0.12"
 features = ["glutin"]

Panic in OS X

thread '<main>' panicked at 'called `Result::unwrap()` on an `Err` value: CompilationError("ERROR: 0:2: \'\' :  version \'110\' is not supported\nERROR: 0:3: \'\' :  #version required and missing.\nERROR: 0:4: \'attribute\' : syntax error: syntax error\n")', ../src/libcore/result.rs:731

https://github.com/tomaka/glium_text/blob/master/src/lib.rs#L226

Need add 140 version shader:

#version 140

uniform mat4 matrix;
in vec2 position;
in vec2 tex_coords;

out vec2 v_tex_coords;

void main() {
    gl_Position = matrix * vec4(position, 0.0, 1.0);
    v_tex_coords = tex_coords;
}

and

#version 140
in vec2 v_tex_coords;
out vec4 f_color;
uniform vec4 color;
uniform sampler2D tex;
void main() {
    f_color = vec4(color.rgb, color.a * texture(tex, v_tex_coords));
    if (f_color.a <= 0.01) {
        discard;
    }
}

Quality of rendered text is very bad

When I run the hello_world example the rendered text looks really bad (at least on my computer). Here is a screenshot:

I have very little familiarity with freetype so I don't really know how to fix this.

Facade not implemented for GlutinFacade

When running both my own code and the hello world example provided, verbatim, Rust appears unable to find the glium::backend::Facade trait or glium::Surface, regardless of the fact that I have glium::Surface and glium::DisplayBuild used.

src/main.rs:14:18: 14:45 error: the trait `glium::backend::Facade` is not implemented for the type `glium::backend::glutin_backend::GlutinFacade` [E0277]
src/main.rs:14     let system = glium_text::TextSystem::new(&display);
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~
src/main.rs:14:18: 14:45 help: run `rustc --explain E0277` to see a detailed explanation
src/main.rs:14:18: 14:45 note: required by `glium_text::TextSystem::new`
src/main.rs:16:16: 16:44 error: the trait `glium::backend::Facade` is not implemented for the type `glium::backend::glutin_backend::GlutinFacade` [E0277]
src/main.rs:16     let font = glium_text::FontTexture::new(&display, &include_bytes!("font.ttf")[..], 70).unwrap();
                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
src/main.rs:16:16: 16:44 help: run `rustc --explain E0277` to see a detailed explanation
src/main.rs:16:16: 16:44 note: required by `glium_text::FontTexture::new`
src/main.rs:36:9: 36:25 error: the trait `glium::Surface` is not implemented for the type `glium::Frame` [E0277]
src/main.rs:36         glium_text::draw(&text, &system, &mut target, matrix, (1.0, 1.0, 0.0, 1.0));

tomaka / glium_text Goto Github PK

glium_text's People

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glium_text's Issues

bump to glium 0.27.0?

FontTexture::new(..) is very very slow when load CJK font

Cannot render with custom DrawParameters

Does not compile with old glium

Panic in OS X

Quality of rendered text is very bad

Facade not implemented for GlutinFacade

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