diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib.rs | 1 | ||||
| -rw-r--r-- | src/shadow.rs | 127 |
2 files changed, 128 insertions, 0 deletions
@@ -11,6 +11,7 @@ pub mod mesh; pub mod texture; pub mod font; pub mod audio; +pub mod shadow; pub fn run<F, G>(gnew: F) where G: state::Game + 'static, F: (Fn(&context::Context) -> G) { console_log::init_with_level(log::Level::Debug).unwrap(); diff --git a/src/shadow.rs b/src/shadow.rs new file mode 100644 index 0000000..f827967 --- /dev/null +++ b/src/shadow.rs @@ -0,0 +1,127 @@ +use glow::HasContext; + +use crate::context; + +pub struct ShadowBuffer { + pub fbo: glow::Framebuffer, + pub depth_tex: glow::Texture, + pub width: i32, + pub height: i32, +} + +impl ShadowBuffer { + pub fn new(ctx: &context::Context, w: i32, h: i32) -> Self { + unsafe { + // generate and bind FBO + let fbo = ctx.gl.create_framebuffer().expect("failed to create framebuffer"); + ctx.gl.bind_framebuffer(glow::FRAMEBUFFER, Some(fbo)); + + // generate and attach depth buffer + let depth_tex = ctx.gl.create_texture().expect("failed to create texture"); + ctx.gl.bind_texture(glow::TEXTURE_2D, Some(depth_tex)); + ctx.gl.tex_image_2d( + glow::TEXTURE_2D, + 0, + glow::DEPTH_COMPONENT as i32, + w, + h, + 0, + glow::DEPTH_COMPONENT, + glow::FLOAT, + None, + ); + ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_MIN_FILTER, glow::LINEAR as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_MAG_FILTER, glow::LINEAR as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_WRAP_S, glow::CLAMP_TO_BORDER as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_WRAP_T, glow::CLAMP_TO_BORDER as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_2D, glow::TEXTURE_COMPARE_MODE, glow::COMPARE_REF_TO_TEXTURE as i32); + ctx.gl.tex_parameter_f32_slice(glow::TEXTURE_2D, glow::TEXTURE_BORDER_COLOR, &[1.0, 1.0, 1.0, 1.0]); + ctx.gl.framebuffer_texture_2d(glow::FRAMEBUFFER, glow::DEPTH_ATTACHMENT, glow::TEXTURE_2D, Some(depth_tex), 0); + ctx.gl.draw_buffer(glow::NONE); + ctx.gl.read_buffer(glow::NONE); + + let status = ctx.gl.check_framebuffer_status(glow::FRAMEBUFFER); + if status != glow::FRAMEBUFFER_COMPLETE { + panic!("error initializing framebuffer: {}", status); + } + Self { + fbo, + depth_tex, + width: w, + height: h, + } + } + } + + pub fn bind(&self, ctx: &context::Context) { + unsafe { + ctx.gl.bind_framebuffer(glow::FRAMEBUFFER, Some(self.fbo)); + ctx.gl.viewport(0, 0, self.width as _, self.height as _); + ctx.gl.clear(glow::DEPTH_BUFFER_BIT); + + } + } +} + +pub struct ShadowBuffer3D { + pub fbo: glow::Framebuffer, + pub depth_cubemap: glow::Texture, + pub width: i32, + pub height: i32, +} + +impl ShadowBuffer3D { + pub fn new(ctx: &context::Context, w: i32, h: i32) -> Self { + unsafe { + // generate and bind FBO + let fbo = ctx.gl.create_framebuffer().expect("failed to create framebuffer"); + ctx.gl.bind_framebuffer(glow::FRAMEBUFFER, Some(fbo)); + + // generate and attach depth buffer + let depth_cubemap = ctx.gl.create_texture().expect("failed to create texture"); + ctx.gl.bind_texture(glow::TEXTURE_CUBE_MAP, Some(depth_cubemap)); + for i in 0..6 { + ctx.gl.tex_image_2d( + glow::TEXTURE_CUBE_MAP_POSITIVE_X + i, + 0, + glow::DEPTH_COMPONENT as i32, + w, + h, + 0, + glow::DEPTH_COMPONENT, + glow::FLOAT, + None, + ); + ctx.gl.tex_parameter_i32(glow::TEXTURE_CUBE_MAP, glow::TEXTURE_MIN_FILTER, glow::LINEAR as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_CUBE_MAP, glow::TEXTURE_MAG_FILTER, glow::LINEAR as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_CUBE_MAP, glow::TEXTURE_WRAP_S, glow::CLAMP_TO_EDGE as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_CUBE_MAP, glow::TEXTURE_WRAP_T, glow::CLAMP_TO_EDGE as i32); + ctx.gl.tex_parameter_i32(glow::TEXTURE_CUBE_MAP, glow::TEXTURE_WRAP_R, glow::CLAMP_TO_EDGE as i32); + } + + ctx.gl.framebuffer_texture(glow::FRAMEBUFFER, glow::DEPTH_ATTACHMENT, Some(depth_cubemap), 0); + ctx.gl.draw_buffer(glow::NONE); + ctx.gl.read_buffer(glow::NONE); + + let status = ctx.gl.check_framebuffer_status(glow::FRAMEBUFFER); + if status != glow::FRAMEBUFFER_COMPLETE { + panic!("error initializing framebuffer: {}", status); + } + Self { + fbo, + depth_cubemap, + width: w, + height: h, + } + } + } + + pub fn bind(&self, ctx: &context::Context) { + unsafe { + ctx.gl.bind_framebuffer(glow::FRAMEBUFFER, Some(self.fbo)); + ctx.gl.viewport(0, 0, self.width as _, self.height as _); + ctx.gl.clear(glow::DEPTH_BUFFER_BIT); + + } + } +} |