mirror of
https://github.com/alacritty/alacritty.git
synced 2024-11-11 13:51:01 -05:00
Render the letter J
This letter brought to you by OpenGL and freetype.
This commit is contained in:
Joe Wilm
parent
e301843686
commit
2b7caf95fd
6 changed files with 722 additions and 7 deletions
395
Cargo.lock
generated
395
Cargo.lock
generated
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dependencies = [
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dependencies = [
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dependencies = [
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]
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name = "dylib"
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version = "0.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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name = "gl"
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[[package]]
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]
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name = "glutin"
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version = "0.4.8"
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"x11-dl 2.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
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]
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name = "kernel32-sys"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
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name = "khronos_api"
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name = "lazy_static"
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version = "0.1.15"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "libc"
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name = "libc"
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version = "0.2.7"
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version = "0.2.7"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "libloading"
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version = "0.2.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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"kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
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"lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
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"winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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source = "registry+https://github.com/rust-lang/crates.io-index"
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"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
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source = "registry+https://github.com/rust-lang/crates.io-index"
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name = "pkg-config"
|
||||||
version = "0.3.7"
|
version = "0.3.7"
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "rand"
|
||||||
|
version = "0.3.14"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "rustc-serialize"
|
||||||
|
version = "0.3.18"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "serde"
|
||||||
|
version = "0.6.14"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"num 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "servo-fontconfig"
|
name = "servo-fontconfig"
|
||||||
version = "0.2.0"
|
version = "0.2.0"
|
||||||
|
|
@ -90,3 +369,119 @@ dependencies = [
|
||||||
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
"pkg-config 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
]
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "shared_library"
|
||||||
|
version = "0.1.4"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "shell32-sys"
|
||||||
|
version = "0.1.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "tempfile"
|
||||||
|
version = "1.1.3"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"kernel32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"rand 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "user32-sys"
|
||||||
|
version = "0.1.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"winapi 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wayland-client"
|
||||||
|
version = "0.5.9"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"crossbeam 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"wayland-scanner 0.5.8 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"wayland-sys 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wayland-kbd"
|
||||||
|
version = "0.3.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"dlib 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"memmap 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"wayland-client 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wayland-scanner"
|
||||||
|
version = "0.5.8"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"xml-rs 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wayland-sys"
|
||||||
|
version = "0.5.9"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"dlib 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"lazy_static 0.1.15 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wayland-window"
|
||||||
|
version = "0.2.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"byteorder 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"tempfile 1.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"wayland-client 0.5.9 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi"
|
||||||
|
version = "0.2.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-build"
|
||||||
|
version = "0.1.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "x11-dl"
|
||||||
|
version = "2.3.1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"dylib 0.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
"libc 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "xml-rs"
|
||||||
|
version = "0.2.2"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
dependencies = [
|
||||||
|
"bitflags 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
|
||||||
|
]
|
||||||
|
|
||||||
|
|
|
||||||
|
|
@ -7,3 +7,6 @@ authors = ["Joe Wilm <joe@jwilm.com>"]
|
||||||
servo-fontconfig = { git = "https://github.com/jwilm/rust-fontconfig" }
|
servo-fontconfig = { git = "https://github.com/jwilm/rust-fontconfig" }
|
||||||
freetype-rs = "0.5.0"
|
freetype-rs = "0.5.0"
|
||||||
libc = "*"
|
libc = "*"
|
||||||
|
glutin = "*"
|
||||||
|
gl = "*"
|
||||||
|
cgmath = "0.7"
|
||||||
|
|
|
||||||
11
res/text.f.glsl
Normal file
11
res/text.f.glsl
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
#version 330 core
|
||||||
|
in vec2 TexCoords;
|
||||||
|
|
||||||
|
uniform sampler2D text;
|
||||||
|
uniform vec3 textColor;
|
||||||
|
|
||||||
|
void main()
|
||||||
|
{
|
||||||
|
vec4 sampled = vec4(1.0, 1.0, 1.0, texture(text, TexCoords).r);
|
||||||
|
gl_FragColor = vec4(1.0, 1.0, 1.0, 1.0) * sampled;
|
||||||
|
}
|
||||||
11
res/text.v.glsl
Normal file
11
res/text.v.glsl
Normal file
|
|
@ -0,0 +1,11 @@
|
||||||
|
#version 330 core
|
||||||
|
layout (location = 0) in vec4 vertex;
|
||||||
|
out vec2 TexCoords;
|
||||||
|
|
||||||
|
uniform mat4 projection;
|
||||||
|
|
||||||
|
void main()
|
||||||
|
{
|
||||||
|
gl_Position = projection * vec4(vertex.xy, 0.0, 1.0);
|
||||||
|
TexCoords = vertex.zw;
|
||||||
|
}
|
||||||
297
src/main.rs
297
src/main.rs
|
|
@ -1,10 +1,305 @@
|
||||||
extern crate fontconfig;
|
extern crate fontconfig;
|
||||||
extern crate freetype;
|
extern crate freetype;
|
||||||
extern crate libc;
|
extern crate libc;
|
||||||
|
extern crate glutin;
|
||||||
|
extern crate gl;
|
||||||
|
extern crate cgmath;
|
||||||
|
|
||||||
mod list_fonts;
|
mod list_fonts;
|
||||||
mod text;
|
mod text;
|
||||||
|
|
||||||
|
|
||||||
|
use std::ffi::CString;
|
||||||
|
use std::mem::size_of;
|
||||||
|
use std::ptr;
|
||||||
|
|
||||||
|
use libc::c_void;
|
||||||
|
|
||||||
|
use gl::types::*;
|
||||||
|
|
||||||
|
use cgmath::Matrix;
|
||||||
|
|
||||||
|
use text::RasterizedGlyph;
|
||||||
|
|
||||||
|
static TEXT_SHADER_V: &'static str = include_str!("../res/text.v.glsl");
|
||||||
|
static TEXT_SHADER_F: &'static str = include_str!("../res/text.f.glsl");
|
||||||
|
|
||||||
fn main() {
|
fn main() {
|
||||||
println!("Hello, world!");
|
let window = glutin::Window::new().unwrap();
|
||||||
|
let (width, height) = window.get_inner_size_pixels().unwrap();
|
||||||
|
unsafe {
|
||||||
|
window.make_current()
|
||||||
|
};
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
gl::load_with(|symbol| window.get_proc_address(symbol) as *const _);
|
||||||
|
gl::Viewport(0, 0, width as i32, height as i32);
|
||||||
|
}
|
||||||
|
|
||||||
|
let rasterizer = text::Rasterizer::new();
|
||||||
|
let glyph_j = rasterizer.get_glyph(180., 'J');
|
||||||
|
|
||||||
|
let tex = AlphaTexture::new(
|
||||||
|
glyph_j.width as i32,
|
||||||
|
glyph_j.height as i32,
|
||||||
|
glyph_j.buf.as_ptr() as *const _
|
||||||
|
);
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
gl::Enable(gl::BLEND);
|
||||||
|
gl::BlendFunc(gl::SRC_ALPHA, gl::ONE_MINUS_SRC_ALPHA);
|
||||||
|
}
|
||||||
|
|
||||||
|
let mut vao: GLuint = 0;
|
||||||
|
let mut vbo: GLuint = 0;
|
||||||
|
unsafe {
|
||||||
|
gl::GenVertexArrays(1, &mut vao);
|
||||||
|
gl::GenBuffers(1, &mut vbo);
|
||||||
|
gl::BindVertexArray(vao);
|
||||||
|
|
||||||
|
gl::BindBuffer(gl::ARRAY_BUFFER, vbo);
|
||||||
|
gl::BufferData(
|
||||||
|
gl::ARRAY_BUFFER,
|
||||||
|
(size_of::<f32>() * 6 * 4) as GLsizeiptr,
|
||||||
|
ptr::null(),
|
||||||
|
gl::DYNAMIC_DRAW
|
||||||
|
);
|
||||||
|
gl::EnableVertexAttribArray(0);
|
||||||
|
gl::VertexAttribPointer(0, 4, gl::FLOAT, gl::FALSE, 4 * size_of::<f32>() as i32,
|
||||||
|
ptr::null());
|
||||||
|
gl::BindBuffer(gl::ARRAY_BUFFER, 0);
|
||||||
|
gl::BindVertexArray(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
let program = ShaderProgram::new(width, height);
|
||||||
|
|
||||||
|
for event in window.wait_events() {
|
||||||
|
unsafe {
|
||||||
|
gl::ClearColor(0.08, 0.08, 0.08, 1.0);
|
||||||
|
gl::Clear(gl::COLOR_BUFFER_BIT);
|
||||||
|
}
|
||||||
|
|
||||||
|
render(&program, &glyph_j, &tex, vbo, vao);
|
||||||
|
|
||||||
|
window.swap_buffers();
|
||||||
|
|
||||||
|
match event {
|
||||||
|
glutin::Event::Closed => break,
|
||||||
|
_ => ()
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/// Render a character
|
||||||
|
///
|
||||||
|
/// TODO use element array to describe quad instead
|
||||||
|
fn render(program: &ShaderProgram, glyph: &RasterizedGlyph, tex: &AlphaTexture, vbo: GLuint,
|
||||||
|
vao: GLuint)
|
||||||
|
{
|
||||||
|
program.activate();
|
||||||
|
unsafe {
|
||||||
|
// set color
|
||||||
|
gl::Uniform3f(program.color, 1., 1., 0.5);
|
||||||
|
}
|
||||||
|
|
||||||
|
// bottom left of character
|
||||||
|
let left = 10. as f32;
|
||||||
|
let bottom = 10. as f32;
|
||||||
|
|
||||||
|
// top right of character
|
||||||
|
let top = bottom + glyph.height as f32;
|
||||||
|
let right = left + glyph.width as f32;
|
||||||
|
let vertices: [[f32; 4]; 6] = [
|
||||||
|
[left, top, 0., 0.],
|
||||||
|
[left, bottom, 0., 1.],
|
||||||
|
[right, bottom, 1., 1.],
|
||||||
|
|
||||||
|
[left, top, 0., 0.],
|
||||||
|
[right, bottom, 1., 1.],
|
||||||
|
[right, top, 1., 0.],
|
||||||
|
];
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
gl::ActiveTexture(gl::TEXTURE0);
|
||||||
|
gl::BindVertexArray(vao);
|
||||||
|
|
||||||
|
gl::BindTexture(gl::TEXTURE_2D, tex.id);
|
||||||
|
gl::BindBuffer(gl::ARRAY_BUFFER, vbo);
|
||||||
|
gl::BufferSubData(
|
||||||
|
gl::ARRAY_BUFFER,
|
||||||
|
0,
|
||||||
|
(4 * 6 * size_of::<f32>()) as isize,
|
||||||
|
vertices.as_ptr() as *const _
|
||||||
|
);
|
||||||
|
gl::BindBuffer(gl::ARRAY_BUFFER, 0);
|
||||||
|
|
||||||
|
|
||||||
|
gl::DrawArrays(gl::TRIANGLES, 0, 6);
|
||||||
|
gl::BindVertexArray(0);
|
||||||
|
gl::BindTexture(gl::TEXTURE_2D, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
program.deactivate();
|
||||||
|
}
|
||||||
|
|
||||||
|
pub struct ShaderProgram {
|
||||||
|
id: GLuint,
|
||||||
|
/// uniform location for projection matrix
|
||||||
|
projection: GLint,
|
||||||
|
/// uniform location foyr textColor
|
||||||
|
color: GLint,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl ShaderProgram {
|
||||||
|
pub fn activate(&self) {
|
||||||
|
unsafe {
|
||||||
|
gl::UseProgram(self.id);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn deactivate(&self) {
|
||||||
|
unsafe {
|
||||||
|
gl::UseProgram(0);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub fn new(width: u32, height: u32) -> ShaderProgram {
|
||||||
|
let vertex_shader = ShaderProgram::create_vertex_shader();
|
||||||
|
let fragment_shader = ShaderProgram::create_fragment_shader();
|
||||||
|
let program = ShaderProgram::create_program(vertex_shader, fragment_shader);
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
gl::DeleteShader(vertex_shader);
|
||||||
|
gl::DeleteShader(fragment_shader);
|
||||||
|
}
|
||||||
|
|
||||||
|
// get uniform locations
|
||||||
|
let projection_str = CString::new("projection").unwrap();
|
||||||
|
let color_str = CString::new("textColor").unwrap();
|
||||||
|
|
||||||
|
let (projection, color) = unsafe {
|
||||||
|
(
|
||||||
|
gl::GetUniformLocation(program, projection_str.as_ptr()),
|
||||||
|
gl::GetUniformLocation(program, color_str.as_ptr())
|
||||||
|
)
|
||||||
|
};
|
||||||
|
|
||||||
|
assert!(projection != gl::INVALID_VALUE as i32);
|
||||||
|
assert!(projection != gl::INVALID_OPERATION as i32);
|
||||||
|
assert!(color != gl::INVALID_VALUE as i32);
|
||||||
|
assert!(color != gl::INVALID_OPERATION as i32);
|
||||||
|
|
||||||
|
let shader = ShaderProgram {
|
||||||
|
id: program,
|
||||||
|
projection: projection,
|
||||||
|
color: color,
|
||||||
|
};
|
||||||
|
|
||||||
|
// set projection uniform
|
||||||
|
let ortho = cgmath::ortho(0., width as f32, 0., height as f32, -1., 1.);
|
||||||
|
let projection: [[f32; 4]; 4] = ortho.into();
|
||||||
|
|
||||||
|
println!("width: {}, height: {}", width, height);
|
||||||
|
|
||||||
|
shader.activate();
|
||||||
|
unsafe {
|
||||||
|
gl::UniformMatrix4fv(shader.projection, 1, gl::FALSE, projection.as_ptr() as *const _);
|
||||||
|
}
|
||||||
|
shader.deactivate();
|
||||||
|
|
||||||
|
shader
|
||||||
|
}
|
||||||
|
|
||||||
|
fn create_program(vertex: GLuint, fragment: GLuint) -> GLuint {
|
||||||
|
|
||||||
|
unsafe {
|
||||||
|
let program = gl::CreateProgram();
|
||||||
|
gl::AttachShader(program, vertex);
|
||||||
|
gl::AttachShader(program, fragment);
|
||||||
|
gl::LinkProgram(program);
|
||||||
|
|
||||||
|
let mut success: GLint = 0;
|
||||||
|
gl::GetProgramiv(program, gl::LINK_STATUS, &mut success);
|
||||||
|
|
||||||
|
if success != (gl::TRUE as GLint) {
|
||||||
|
panic!("failed to link shader program");
|
||||||
|
}
|
||||||
|
program
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn create_fragment_shader() -> GLuint {
|
||||||
|
unsafe {
|
||||||
|
let fragment_shader = gl::CreateShader(gl::FRAGMENT_SHADER);
|
||||||
|
let fragment_source = CString::new(TEXT_SHADER_F).unwrap();
|
||||||
|
gl::ShaderSource(fragment_shader, 1, &fragment_source.as_ptr(), ptr::null());
|
||||||
|
gl::CompileShader(fragment_shader);
|
||||||
|
|
||||||
|
let mut success: GLint = 0;
|
||||||
|
gl::GetShaderiv(fragment_shader, gl::COMPILE_STATUS, &mut success);
|
||||||
|
|
||||||
|
if success != (gl::TRUE as GLint) {
|
||||||
|
panic!("failed to compiler fragment shader");
|
||||||
|
}
|
||||||
|
fragment_shader
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn create_vertex_shader() -> GLuint {
|
||||||
|
unsafe {
|
||||||
|
let vertex_shader = gl::CreateShader(gl::VERTEX_SHADER);
|
||||||
|
let vertex_source = CString::new(TEXT_SHADER_V).unwrap();
|
||||||
|
gl::ShaderSource(vertex_shader, 1, &vertex_source.as_ptr(), ptr::null());
|
||||||
|
gl::CompileShader(vertex_shader);
|
||||||
|
|
||||||
|
let mut success: GLint = 0;
|
||||||
|
gl::GetShaderiv(vertex_shader, gl::COMPILE_STATUS, &mut success);
|
||||||
|
|
||||||
|
if success != (gl::TRUE as GLint) {
|
||||||
|
panic!("failed to compiler vertex shader");
|
||||||
|
}
|
||||||
|
vertex_shader
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
struct AlphaTexture {
|
||||||
|
pub id: GLuint,
|
||||||
|
pub width: i32,
|
||||||
|
pub height: i32,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl AlphaTexture {
|
||||||
|
pub fn new(width: i32, height: i32, bytes: *const ::std::os::raw::c_void) -> AlphaTexture {
|
||||||
|
let mut id: GLuint = 0;
|
||||||
|
unsafe {
|
||||||
|
gl::PixelStorei(gl::UNPACK_ALIGNMENT, 1);
|
||||||
|
gl::GenTextures(1, &mut id);
|
||||||
|
gl::BindTexture(gl::TEXTURE_2D, id);
|
||||||
|
gl::TexImage2D(
|
||||||
|
gl::TEXTURE_2D,
|
||||||
|
0,
|
||||||
|
gl::RED as i32,
|
||||||
|
width as i32,
|
||||||
|
height as i32,
|
||||||
|
0,
|
||||||
|
gl::RED,
|
||||||
|
gl::UNSIGNED_BYTE,
|
||||||
|
bytes
|
||||||
|
);
|
||||||
|
|
||||||
|
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, gl::CLAMP_TO_EDGE as i32);
|
||||||
|
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, gl::CLAMP_TO_EDGE as i32);
|
||||||
|
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::LINEAR as i32);
|
||||||
|
gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::LINEAR as i32);
|
||||||
|
|
||||||
|
gl::BindTexture(gl::TEXTURE_2D, 0);
|
||||||
|
}
|
||||||
|
|
||||||
|
AlphaTexture {
|
||||||
|
id: id,
|
||||||
|
width: width,
|
||||||
|
height: height,
|
||||||
|
}
|
||||||
|
}
|
||||||
}
|
}
|
||||||
|
|
|
||||||
12
src/text.rs
12
src/text.rs
|
|
@ -49,12 +49,12 @@ impl Rasterizer {
|
||||||
}
|
}
|
||||||
|
|
||||||
#[derive(Debug)]
|
#[derive(Debug)]
|
||||||
struct RasterizedGlyph {
|
pub struct RasterizedGlyph {
|
||||||
width: usize,
|
pub width: usize,
|
||||||
height: usize,
|
pub height: usize,
|
||||||
top: usize,
|
pub top: usize,
|
||||||
left: usize,
|
pub left: usize,
|
||||||
buf: Vec<u8>,
|
pub buf: Vec<u8>,
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue