Commit 9015a609d6606b17d8c9be123a8a464137452f7a - chenoska

Some very hacky texture display Getty Ritter 6 years ago

3 changed file(s) with 76 addition(s) and 7 deletion(s). Collapse all Expand all

sample.png less more

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+56

-0

src/graphics/mod.rs less more

6	6	mod errors;
7	7	pub use self::errors::Error;
8	8	use std::{ffi,mem,ptr};
	9	use imagefmt::{Image, ColFmt};
9	10
10	11	//
11	12

181	182	)
182	183	})
183	184	}
	185
	186	pub fn set_texture(&self, s: &str, t: &Texture) -> Result<(), Error>{
	187	unsafe {
	188	gl::ActiveTexture(gl::TEXTURE0);
	189	gl::BindTexture(gl::TEXTURE_2D, t.idx);
	190	let t = gl::GetUniformLocation(
	191	self.p,
	192	ffi::CString::new(s)?.as_ptr(),
	193	);
	194	gl::Uniform1i(t, 0);
	195	}
	196	Ok(())
	197	}
184	198	}
185	199
186	200	//

264	278	}
265	279	}
266	280	}
	281
	282
	283	pub struct Texture {
	284	idx: u32,
	285	}
	286
	287	impl Texture {
	288
	289	pub fn new_from_bitmap(image: &Image<u8>) -> Texture {
	290	let mut idx = 0;
	291	unsafe {
	292	gl::GenTextures(1, &mut idx);
	293	gl::BindTexture(gl::TEXTURE_2D, idx);
	294
	295	gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::NEAREST as gl::GLint);
	296	gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST as gl::GLint);
	297	gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_S, gl::CLAMP_TO_EDGE as gl::GLint);
	298	gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_WRAP_T, gl::CLAMP_TO_EDGE as gl::GLint);
	299
	300	let fmt = match image.fmt {
	301	ColFmt::RGB => gl::RGB,
	302	ColFmt::RGBA => gl::RGBA,
	303	_ => panic!("Unknown format: {:?}", image.fmt),
	304	};
	305
	306	gl::TexImage2D(
	307	gl::TEXTURE_2D,
	308	0,
	309	fmt as gl::GLint,
	310	image.w as gl::GLint,
	311	image.h as gl::GLint,
	312	0,
	313	fmt,
	314	gl::UNSIGNED_BYTE,
	315	mem::transmute(&image.buf[0]),
	316	);
	317
	318	gl::BindTexture(gl::TEXTURE_2D, 0);
	319	}
	320	Texture { idx }
	321	}
	322	}

+20

-7

src/main.rs less more

1		// mod pan {
2		// extern crate panem_nostrum_quotidianum;
3		// pub use self::panem_nostrum_quotidianum::*;
4		// }
5	1	mod gl {
6	2	extern crate gl;
7	3	pub use self::gl::types::*;

37	33	}
38	34
39	35	static TILE_DATA: [Vertex; 4] = [
	36	Vertex { x: 0.5, y: -0.5, u: 1.0, v: 0.0 },
40	37	Vertex { x: -0.5, y: -0.5, u: 0.0, v: 0.0 },
41		Vertex { x: 0.5, y: -0.5, u: 1.0, v: 0.0 },
42	38	Vertex { x: 0.5, y: 0.5, u: 1.0, v: 1.0 },
43	39	Vertex { x: -0.5, y: 0.5, u: 0.0, v: 1.0 },
44	40	];

54	50	#version 150
55	51	in vec2 position;
56	52	in vec2 uv;
	53
	54	out vec2 t_uv;
	55
57	56	void main() {
58	57	gl_Position = vec4(position.x, position.y, 0.5, 1.0);
	58	t_uv = uv;
59	59	}";
60	60
61	61	static FS_SRC: &'static str = "
62	62	#version 150
	63
	64	in vec2 t_uv;
63	65	out vec4 out_color;
	66
	67	uniform sampler2D tex;
	68
64	69	void main() {
65		out_color = ~~vec4(1.0, 1.0, 1.0, 1.0~~);
	70	out_color = texture(tex, t_uv);
	71	// out_color = vec4(1.0 - t_uv.x, 1.0 - t_uv.y, 1.0, 1.0);
66	72	}";
67	73
68	74	pub fn main_loop() -> Result<(), pan::Error> {
	75	let mut f = std::fs::File::open("sample.png").unwrap();
	76	let texture: imagefmt::Image<u8> = imagefmt::png::read(&mut f, imagefmt::ColFmt::RGBA).unwrap();
	77	println!("{:#?}", texture);
	78
69	79	let window = pan::Window::create()?;
70	80
71	81	let vs = pan::Shader::compile(pan::ShaderType::Vertex, VS_SRC)?;
72	82	let fs = pan::Shader::compile(pan::ShaderType::Fragment, FS_SRC)?;
73	83	let program = pan::Program::link(vec![vs, fs])?;
	84
	85	let tex = pan::Texture::new_from_bitmap(&texture);
74	86
75	87	let vbo = pan::VertexBuffer::new_array_buffer(
76	88	pan::VertexArray::new(),

133	145	gl::Clear(gl::COLOR_BUFFER_BIT);
134	146
135	147	vbo.bind();
	148	program.set_texture("tex", &tex).unwrap();
136	149
137		gl::DrawArrays(gl::TRIANGLES, 0, 4);
	150	gl::DrawArrays(gl::TRIANGLE_STRIP, 0, 4);
138	151	}
139	152
140	153	ControlFlow::Continue