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Format component compositing #21373

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This commit is contained in:
kingdido999 2018-08-31 08:19:22 +08:00
parent 1ee3deea27
commit e4cd04399e
5 changed files with 363 additions and 255 deletions
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73
components/compositing/gl.rs
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@ -2,12 +2,10 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use gleam::gl;
use image::RgbImage;
use servo_geometry::DeviceUintLength;
#[derive(Default)]
pub struct RenderTargetInfo {
framebuffer_ids: Vec<gl::GLuint>,
@ -16,7 +14,9 @@ pub struct RenderTargetInfo {
}
pub fn initialize_png(
gl: &gl::Gl, width: DeviceUintLength, height: DeviceUintLength
gl: &gl::Gl,
width: DeviceUintLength,
height: DeviceUintLength,
) -> RenderTargetInfo {
let framebuffer_ids = gl.gen_framebuffers(1);
gl.bind_framebuffer(gl::FRAMEBUFFER, framebuffer_ids[0]);
@ -24,27 +24,53 @@ pub fn initialize_png(
let texture_ids = gl.gen_textures(1);
gl.bind_texture(gl::TEXTURE_2D, texture_ids[0]);
gl.tex_image_2d(gl::TEXTURE_2D, 0, gl::RGB as gl::GLint, width.get() as gl::GLsizei,
height.get() as gl::GLsizei, 0, gl::RGB, gl::UNSIGNED_BYTE, None);
gl.tex_parameter_i(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::NEAREST as gl::GLint);
gl.tex_parameter_i(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::NEAREST as gl::GLint);
gl.tex_image_2d(
gl::TEXTURE_2D,
0,
gl::RGB as gl::GLint,
width.get() as gl::GLsizei,
height.get() as gl::GLsizei,
0,
gl::RGB,
gl::UNSIGNED_BYTE,
None,
);
gl.tex_parameter_i(
gl::TEXTURE_2D,
gl::TEXTURE_MAG_FILTER,
gl::NEAREST as gl::GLint,
);
gl.tex_parameter_i(
gl::TEXTURE_2D,
gl::TEXTURE_MIN_FILTER,
gl::NEAREST as gl::GLint,
);
gl.framebuffer_texture_2d(gl::FRAMEBUFFER, gl::COLOR_ATTACHMENT0, gl::TEXTURE_2D,
texture_ids[0], 0);
gl.framebuffer_texture_2d(
gl::FRAMEBUFFER,
gl::COLOR_ATTACHMENT0,
gl::TEXTURE_2D,
texture_ids[0],
0,
);
gl.bind_texture(gl::TEXTURE_2D, 0);
let renderbuffer_ids = gl.gen_renderbuffers(1);
let depth_rb = renderbuffer_ids[0];
gl.bind_renderbuffer(gl::RENDERBUFFER, depth_rb);
gl.renderbuffer_storage(gl::RENDERBUFFER,
gl::DEPTH_COMPONENT24,
width.get() as gl::GLsizei,
height.get() as gl::GLsizei);
gl.framebuffer_renderbuffer(gl::FRAMEBUFFER,
gl::DEPTH_ATTACHMENT,
gl::RENDERBUFFER,
depth_rb);
gl.renderbuffer_storage(
gl::RENDERBUFFER,
gl::DEPTH_COMPONENT24,
width.get() as gl::GLsizei,
height.get() as gl::GLsizei,
);
gl.framebuffer_renderbuffer(
gl::FRAMEBUFFER,
gl::DEPTH_ATTACHMENT,
gl::RENDERBUFFER,
depth_rb,
);
RenderTargetInfo {
framebuffer_ids,
@ -70,10 +96,12 @@ pub fn draw_img(
gl.bind_vertex_array(0);
let mut pixels = gl.read_pixels(
0, 0,
0,
0,
width as gl::GLsizei,
height as gl::GLsizei,
gl::RGB, gl::UNSIGNED_BYTE,
gl::RGB,
gl::UNSIGNED_BYTE,
);
gl.bind_framebuffer(gl::FRAMEBUFFER, 0);
@ -88,10 +116,9 @@ pub fn draw_img(
for y in 0..height {
let dst_start = y * stride;
let src_start = (height - y - 1) * stride;
let src_slice = &orig_pixels[src_start .. src_start + stride];
(&mut pixels[dst_start .. dst_start + stride]).clone_from_slice(&src_slice[..stride]);
let src_slice = &orig_pixels[src_start..src_start + stride];
(&mut pixels[dst_start..dst_start + stride]).clone_from_slice(&src_slice[..stride]);
}
RgbImage::from_raw(width as u32, height as u32, pixels)
.expect("Flipping image failed!")
RgbImage::from_raw(width as u32, height as u32, pixels).expect("Flipping image failed!")
}