982 lines
26 KiB
Rust
982 lines
26 KiB
Rust
// Copyright 2016 Matthew Collins
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use glow as gl;
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use glow::{HasContext, PixelPackData, PixelUnpackData};
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use log::error;
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use std::mem;
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use std::ops::BitOr;
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use std::ops::{Deref, DerefMut};
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static mut CONTEXT: *mut glow::Context = 0 as *mut glow::Context;
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/// Inits the gl library. This should be called once a context is ready.
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pub fn init(context: glow::Context) {
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unsafe {
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CONTEXT = Box::into_raw(Box::new(context));
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}
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}
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fn glow_context() -> &'static glow::Context {
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unsafe { CONTEXT.as_ref().unwrap() }
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}
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/// Dsed to specify how the vertices will be handled
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/// to draw.
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pub type DrawType = u32;
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/// Treats each set of 3 vertices as a triangle
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pub const TRIANGLES: DrawType = gl::TRIANGLES;
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/// Means the previous vertex connects to the next
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/// one in a continuous strip.
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pub const LINE_STRIP: DrawType = gl::LINE_STRIP;
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/// Treats each set of 2 vertices as a line
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pub const LINES: DrawType = gl::LINES;
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/// Treats each vertex as a point
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pub const POINTS: DrawType = gl::POINTS;
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pub fn draw_arrays(ty: DrawType, offset: usize, count: usize) {
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unsafe {
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glow_context().draw_arrays(ty, offset as i32, count as i32);
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}
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}
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pub fn draw_elements(ty: DrawType, count: i32, dty: Type, offset: usize) {
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unsafe {
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glow_context().draw_elements(ty, count, dty, offset as i32);
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}
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}
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// Sets the size of the viewport of this context.
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pub fn viewport(x: i32, y: i32, w: i32, h: i32) {
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unsafe {
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glow_context().viewport(x, y, w, h);
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}
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}
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/// Sets the color the color buffer should be cleared to
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/// when Clear is called with the color flag.
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pub fn clear_color(r: f32, g: f32, b: f32, a: f32) {
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unsafe {
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glow_context().clear_color(r, g, b, a);
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}
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}
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/// `ClearFlags` is a set of flags to mark what should be cleared during
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/// a Clear call.
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pub enum ClearFlags {
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/// Marks the color buffer to be cleared
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Color,
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/// Marks the depth buffer to be cleared
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Depth,
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Internal(u32),
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}
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impl ClearFlags {
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fn internal(self) -> u32 {
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match self {
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ClearFlags::Color => gl::COLOR_BUFFER_BIT,
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ClearFlags::Depth => gl::DEPTH_BUFFER_BIT,
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ClearFlags::Internal(val) => val,
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}
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}
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}
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impl BitOr for ClearFlags {
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type Output = ClearFlags;
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fn bitor(self, rhs: ClearFlags) -> ClearFlags {
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ClearFlags::Internal(self.internal() | rhs.internal())
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}
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}
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/// Clears the buffers specified by the passed flags.
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pub fn clear(flags: ClearFlags) {
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unsafe { glow_context().clear(flags.internal()) }
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}
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pub fn depth_mask(f: bool) {
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unsafe {
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glow_context().depth_mask(f);
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}
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}
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/// `Func` is a function to be preformed on two values.
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pub type Func = u32;
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pub const NEVER: Func = gl::NEVER;
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pub const LESS: Func = gl::LESS;
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pub const LESS_OR_EQUAL: Func = gl::LEQUAL;
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pub const GREATER: Func = gl::GREATER;
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pub const ALWAYS: Func = gl::ALWAYS;
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pub const EQUAL: Func = gl::EQUAL;
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pub fn depth_func(f: Func) {
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unsafe {
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glow_context().depth_func(f);
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}
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}
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/// Flag is a setting that can be enabled or disabled on the context.
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pub type Flag = u32;
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pub const DEPTH_TEST: Flag = gl::DEPTH_TEST;
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pub const CULL_FACE_FLAG: Flag = gl::CULL_FACE;
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pub const STENCIL_TEST: Flag = gl::STENCIL_TEST;
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pub const BLEND: Flag = gl::BLEND;
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pub const MULTISAMPLE: Flag = gl::MULTISAMPLE;
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/// Enables the passed flag.
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pub fn enable(f: Flag) {
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unsafe {
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glow_context().enable(f);
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}
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}
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/// Disables the passed flag.
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pub fn disable(f: Flag) {
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unsafe {
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glow_context().disable(f);
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}
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}
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/// Sets the texture slot with the passed id as the
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/// currently active one.
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pub fn active_texture(id: u32) {
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unsafe {
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glow_context().active_texture(gl::TEXTURE0 + id);
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}
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}
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/// `Factor` is used in blending
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pub type Factor = u32;
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pub const SRC_ALPHA: Factor = gl::SRC_ALPHA;
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pub const ONE_MINUS_SRC_ALPHA: Factor = gl::ONE_MINUS_SRC_ALPHA;
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pub const ONE_FACTOR: Factor = gl::ONE;
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pub const ZERO_FACTOR: Factor = gl::ZERO;
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/// Sets the factors to be used when blending.
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pub fn blend_func(s_factor: Factor, d_factor: Factor) {
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unsafe {
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glow_context().blend_func(s_factor, d_factor);
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}
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}
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pub fn blend_func_separate(
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s_factor_rgb: Factor,
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d_factor_rgb: Factor,
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s_factor_a: Factor,
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d_factor_a: Factor,
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) {
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unsafe {
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glow_context().blend_func_separate(s_factor_rgb, d_factor_rgb, s_factor_a, d_factor_a);
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}
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}
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// Face specifies a face to act on.
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pub type Face = u32;
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pub const BACK: Face = gl::BACK;
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pub const FRONT: Face = gl::FRONT;
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/// Sets the face to be culled by the gpu.
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pub fn cull_face(face: Face) {
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unsafe {
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glow_context().cull_face(face);
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}
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}
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// FaceDirection is used to specify an order of vertices, normally
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// used to set which is considered to be the front face.
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pub type FaceDirection = u32;
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pub const CLOCK_WISE: FaceDirection = gl::CW;
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pub const COUNTER_CLOCK_WISE: FaceDirection = gl::CCW;
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/// Sets the direction of vertices used to specify the
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/// front face (e.g. for culling).
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pub fn front_face(dir: FaceDirection) {
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unsafe { glow_context().front_face(dir) }
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}
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/// `Type` is a type of data used by various operations.
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pub type Type = u32;
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pub const UNSIGNED_BYTE: Type = gl::UNSIGNED_BYTE;
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pub const UNSIGNED_SHORT: Type = gl::UNSIGNED_SHORT;
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pub const UNSIGNED_INT: Type = gl::UNSIGNED_INT;
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pub const BYTE: Type = gl::BYTE;
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pub const SHORT: Type = gl::SHORT;
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pub const FLOAT: Type = gl::FLOAT;
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/// `TextureTarget` is a target were a texture can be bound to
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pub type TextureTarget = u32;
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pub const TEXTURE_2D: TextureTarget = gl::TEXTURE_2D;
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pub const TEXTURE_2D_MULTISAMPLE: TextureTarget = gl::TEXTURE_2D_MULTISAMPLE;
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pub const TEXTURE_2D_ARRAY: TextureTarget = gl::TEXTURE_2D_ARRAY;
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pub const TEXTURE_3D: TextureTarget = gl::TEXTURE_3D;
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/// `TextureFormat` is the format of a texture either internally or
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/// to be uploaded.
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pub type TextureFormat = u32;
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pub const RED: TextureFormat = gl::RED;
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pub const RGB: TextureFormat = gl::RGB;
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pub const RGBA: TextureFormat = gl::RGBA;
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pub const RGBA8: TextureFormat = gl::RGBA8;
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pub const RGBA16F: TextureFormat = gl::RGBA16F;
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pub const R16F: TextureFormat = gl::R16F;
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pub const DEPTH_COMPONENT24: TextureFormat = gl::DEPTH_COMPONENT24;
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pub const DEPTH_COMPONENT: TextureFormat = gl::DEPTH_COMPONENT;
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/// `TextureParameter` is a parameter that can be read or set on a texture.
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pub type TextureParameter = u32;
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pub const TEXTURE_MIN_FILTER: TextureParameter = gl::TEXTURE_MIN_FILTER;
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pub const TEXTURE_MAG_FILTER: TextureParameter = gl::TEXTURE_MAG_FILTER;
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pub const TEXTURE_WRAP_S: TextureParameter = gl::TEXTURE_WRAP_S;
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pub const TEXTURE_WRAP_T: TextureParameter = gl::TEXTURE_WRAP_T;
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pub const TEXTURE_MAX_LEVEL: TextureParameter = gl::TEXTURE_MAX_LEVEL;
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/// `TextureValue` is a value that be set on a texture's parameter.
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pub type TextureValue = i32;
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pub const NEAREST: TextureValue = gl::NEAREST as TextureValue;
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pub const LINEAR: TextureValue = gl::LINEAR as TextureValue;
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pub const LINEAR_MIPMAP_LINEAR: TextureValue = gl::LINEAR_MIPMAP_LINEAR as TextureValue;
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pub const LINEAR_MIPMAP_NEAREST: TextureValue = gl::LINEAR_MIPMAP_NEAREST as TextureValue;
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pub const NEAREST_MIPMAP_NEAREST: TextureValue = gl::NEAREST_MIPMAP_NEAREST as TextureValue;
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pub const NEAREST_MIPMAP_LINEAR: TextureValue = gl::NEAREST_MIPMAP_LINEAR as TextureValue;
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pub const CLAMP_TO_EDGE: TextureValue = gl::CLAMP_TO_EDGE as TextureValue;
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/// `Texture` is a buffer of data used by fragment shaders.
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#[derive(Default)]
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pub struct Texture(glow::Texture);
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impl Texture {
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// Allocates a new texture.
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pub fn new() -> Texture {
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Texture(unsafe {
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glow_context()
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.create_texture()
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.expect("create texture failed")
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})
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}
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/// Binds the texture to the passed target.
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pub fn bind(&self, target: TextureTarget) {
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unsafe {
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glow_context().bind_texture(target, Some(self.0));
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}
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}
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pub fn get_pixels(
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&self,
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target: TextureTarget,
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level: i32,
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format: TextureFormat,
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ty: Type,
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pixels: &mut [u8],
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) {
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unsafe {
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glow_context().get_tex_image(target, level, format, ty, PixelPackData::Slice(pixels));
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}
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}
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pub fn image_2d(
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&self,
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target: TextureTarget,
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level: i32,
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width: u32,
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height: u32,
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format: TextureFormat,
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ty: Type,
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pix: Option<&[u8]>,
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) {
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unsafe {
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glow_context().tex_image_2d(
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target,
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level,
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format as i32,
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width as i32,
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height as i32,
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0,
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format,
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ty,
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pix,
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);
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}
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}
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pub fn sub_image_2d(
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&self,
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target: TextureTarget,
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level: i32,
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x: u32,
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y: u32,
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width: u32,
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height: u32,
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format: TextureFormat,
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ty: Type,
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pix: &[u8],
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) {
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unsafe {
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glow_context().tex_sub_image_2d(
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target,
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level,
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x as i32,
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y as i32,
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width as i32,
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height as i32,
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format,
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ty,
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PixelUnpackData::Slice(pix),
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);
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}
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}
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pub fn image_2d_ex(
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&self,
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target: TextureTarget,
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level: i32,
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width: u32,
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height: u32,
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internal_format: TextureFormat,
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format: TextureFormat,
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ty: Type,
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pix: Option<&[u8]>,
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) {
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unsafe {
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glow_context().tex_image_2d(
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target,
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level,
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internal_format as i32,
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width as i32,
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height as i32,
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0,
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format,
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ty,
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pix,
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);
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}
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}
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pub fn image_3d(
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&self,
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target: TextureTarget,
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level: i32,
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width: u32,
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height: u32,
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depth: u32,
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format: TextureFormat,
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ty: Type,
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pix: &[u8],
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) {
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unsafe {
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glow_context().tex_image_3d(
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target,
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level,
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format as i32,
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width as i32,
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height as i32,
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depth as i32,
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0,
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format,
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ty,
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Some(pix),
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);
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}
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}
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pub fn sub_image_3d(
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&self,
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target: TextureTarget,
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level: i32,
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x: u32,
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y: u32,
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z: u32,
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width: u32,
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height: u32,
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depth: u32,
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format: TextureFormat,
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ty: Type,
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pix: &[u8],
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) {
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unsafe {
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glow_context().tex_sub_image_3d(
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target,
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level,
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x as i32,
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y as i32,
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z as i32,
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width as i32,
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height as i32,
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depth as i32,
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format,
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ty,
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PixelUnpackData::Slice(pix),
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);
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}
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}
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pub fn set_parameter(
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&self,
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target: TextureTarget,
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param: TextureParameter,
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value: TextureValue,
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) {
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unsafe {
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glow_context().tex_parameter_i32(target, param, value);
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}
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}
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}
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impl Drop for Texture {
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fn drop(&mut self) {
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unsafe {
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glow_context().delete_texture(self.0);
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}
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}
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}
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pub type ShaderType = u32;
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pub const VERTEX_SHADER: ShaderType = gl::VERTEX_SHADER;
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pub const FRAGMENT_SHADER: ShaderType = gl::FRAGMENT_SHADER;
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pub const GEOMETRY_SHADER: ShaderType = gl::GEOMETRY_SHADER;
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pub type ShaderParameter = u32;
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pub const COMPILE_STATUS: ShaderParameter = gl::COMPILE_STATUS;
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pub const INFO_LOG_LENGTH: ShaderParameter = gl::INFO_LOG_LENGTH;
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#[derive(Default)]
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pub struct Program(glow::Program);
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impl Program {
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pub fn new() -> Program {
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Program(unsafe {
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glow_context()
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.create_program()
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.expect("program creation failed")
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})
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}
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pub fn attach_shader(&self, shader: Shader) {
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unsafe {
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glow_context().attach_shader(self.0, shader.0);
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}
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}
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pub fn link(&self) {
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unsafe {
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glow_context().link_program(self.0);
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}
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}
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pub fn use_program(&self) {
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unsafe {
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glow_context().use_program(Some(self.0));
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}
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}
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pub fn uniform_location(&self, name: &str) -> Option<Uniform> {
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let u = unsafe { glow_context().get_uniform_location(self.0, name) };
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if let Some(u) = u {
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Some(Uniform(u))
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} else {
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None
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}
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}
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pub fn attribute_location(&self, name: &str) -> Option<Attribute> {
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let a = unsafe { glow_context().get_attrib_location(self.0, name) };
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if let Some(a) = a {
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Some(Attribute(a as i32))
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} else {
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None
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}
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}
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}
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impl Drop for Program {
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fn drop(&mut self) {
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unsafe {
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glow_context().delete_program(self.0);
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}
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}
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}
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pub struct Shader(glow::Shader);
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impl Shader {
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pub fn new(ty: ShaderType) -> Shader {
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Shader(unsafe {
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glow_context()
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.create_shader(ty)
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.expect("failed to create shader")
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})
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}
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pub fn set_source(&self, src: &str) {
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unsafe {
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glow_context().shader_source(self.0, src);
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}
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}
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|
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pub fn compile(&self) {
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unsafe {
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glow_context().compile_shader(self.0);
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}
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}
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pub fn get_shader_compile_status(&self) -> bool {
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unsafe { glow_context().get_shader_compile_status(self.0) }
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}
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pub fn get_info_log(&self) -> String {
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unsafe { glow_context().get_shader_info_log(self.0) }
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}
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}
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|
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#[derive(Clone)]
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pub struct Uniform(glow::UniformLocation);
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|
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impl Uniform {
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pub fn set_int(&self, val: i32) {
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unsafe {
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|
glow_context().uniform_1_i32(Some(&self.0), val);
|
|
}
|
|
}
|
|
|
|
pub fn set_int3(&self, x: i32, y: i32, z: i32) {
|
|
unsafe {
|
|
glow_context().uniform_3_i32(Some(&self.0), x, y, z);
|
|
}
|
|
}
|
|
|
|
pub fn set_float(&self, val: f32) {
|
|
unsafe {
|
|
glow_context().uniform_1_f32(Some(&self.0), val);
|
|
}
|
|
}
|
|
|
|
pub fn set_float2(&self, x: f32, y: f32) {
|
|
unsafe {
|
|
glow_context().uniform_2_f32(Some(&self.0), x, y);
|
|
}
|
|
}
|
|
|
|
pub fn set_float3(&self, x: f32, y: f32, z: f32) {
|
|
unsafe {
|
|
glow_context().uniform_3_f32(Some(&self.0), x, y, z);
|
|
}
|
|
}
|
|
|
|
pub fn set_float4(&self, x: f32, y: f32, z: f32, w: f32) {
|
|
unsafe {
|
|
glow_context().uniform_4_f32(Some(&self.0), x, y, z, w);
|
|
}
|
|
}
|
|
|
|
pub fn set_float_multi(&self, v: &[[f32; 4]]) {
|
|
unsafe {
|
|
glow_context()
|
|
.uniform_4_f32_slice(Some(&self.0), &*(v as *const [[f32; 4]] as *const [f32; 4]))
|
|
}
|
|
}
|
|
|
|
pub fn set_matrix4(&self, m: &::cgmath::Matrix4<f32>) {
|
|
unsafe {
|
|
glow_context().uniform_matrix_4_f32_slice(
|
|
Some(&self.0),
|
|
false,
|
|
&*(m as *const cgmath::Matrix4<f32> as *const [f32; 4 * 4]),
|
|
);
|
|
}
|
|
}
|
|
|
|
pub fn set_matrix4_multi(&self, m: &[::cgmath::Matrix4<f32>]) {
|
|
unsafe {
|
|
glow_context().uniform_matrix_4_f32_slice(
|
|
Some(&self.0),
|
|
false,
|
|
std::slice::from_raw_parts(m.as_ptr() as *const _, m.len() * 4 * 4),
|
|
); // TODO: Most likely isn't safe
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone, Copy)]
|
|
pub struct Attribute(i32);
|
|
|
|
impl Attribute {
|
|
pub fn enable(&self) {
|
|
unsafe {
|
|
glow_context().enable_vertex_attrib_array(self.0 as u32);
|
|
}
|
|
}
|
|
|
|
pub fn disable(&self) {
|
|
unsafe {
|
|
glow_context().disable_vertex_attrib_array(self.0 as u32);
|
|
}
|
|
}
|
|
|
|
pub fn vertex_pointer(&self, size: i32, ty: Type, normalized: bool, stride: i32, offset: i32) {
|
|
unsafe {
|
|
glow_context().vertex_attrib_pointer_f32(
|
|
self.0 as u32,
|
|
size,
|
|
ty,
|
|
normalized,
|
|
stride,
|
|
offset,
|
|
);
|
|
}
|
|
}
|
|
|
|
pub fn vertex_pointer_int(&self, size: i32, ty: Type, stride: i32, offset: i32) {
|
|
unsafe {
|
|
glow_context().vertex_attrib_pointer_i32(self.0 as u32, size, ty, stride, offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
// VertexArray is used to store state needed to render vertices.
|
|
// This includes buffers, the format of the buffers and enabled
|
|
// attributes.
|
|
#[derive(Default)]
|
|
pub struct VertexArray(glow::VertexArray);
|
|
|
|
impl VertexArray {
|
|
/// Allocates a new `VertexArray`.
|
|
pub fn new() -> VertexArray {
|
|
VertexArray(unsafe {
|
|
glow_context()
|
|
.create_vertex_array()
|
|
.expect("create vertex array failed")
|
|
})
|
|
}
|
|
|
|
/// Marks the `VertexArray` as the currently active one, this
|
|
/// means buffers/the format of the buffers etc will be bound to
|
|
/// this `VertexArray`.
|
|
pub fn bind(&self) {
|
|
unsafe {
|
|
glow_context().bind_vertex_array(Some(self.0));
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for VertexArray {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
glow_context().delete_vertex_array(self.0);
|
|
}
|
|
self.0 = glow::VertexArray::default();
|
|
}
|
|
}
|
|
|
|
/// `BufferTarget` is a target for a buffer to be bound to.
|
|
pub type BufferTarget = u32;
|
|
|
|
pub const ARRAY_BUFFER: BufferTarget = gl::ARRAY_BUFFER;
|
|
pub const ELEMENT_ARRAY_BUFFER: BufferTarget = gl::ELEMENT_ARRAY_BUFFER;
|
|
|
|
/// `BufferUsage` states how a buffer is going to be used by the program.
|
|
pub type BufferUsage = u32;
|
|
|
|
/// Marks the buffer as 'not going to change' after the
|
|
/// initial data upload to be rendered by the gpu.
|
|
pub const STATIC_DRAW: BufferUsage = gl::STATIC_DRAW;
|
|
/// Marks the buffer as 'changed frequently' during the
|
|
/// course of the program whilst being rendered by the gpu.
|
|
pub const DYNAMIC_DRAW: BufferUsage = gl::DYNAMIC_DRAW;
|
|
/// Marks the buffer as 'changed every frame' whilst being
|
|
/// rendered by the gpu.
|
|
pub const STREAM_DRAW: BufferUsage = gl::STREAM_DRAW;
|
|
|
|
/// Access states how a value will be accesed by the program.
|
|
pub type Access = u32;
|
|
|
|
/// States that the returned value will only be read.
|
|
pub const READ_ONLY: Access = gl::READ_ONLY;
|
|
/// States that the returned value will only be written
|
|
/// to.
|
|
pub const WRITE_ONLY: Access = gl::WRITE_ONLY;
|
|
|
|
/// `Buffer` is a storage for vertex data.
|
|
#[derive(Default)]
|
|
pub struct Buffer(glow::Buffer);
|
|
|
|
impl Buffer {
|
|
/// Allocates a new Buffer.
|
|
pub fn new() -> Buffer {
|
|
Buffer(unsafe {
|
|
glow_context()
|
|
.create_buffer()
|
|
.expect("create buffer failed")
|
|
})
|
|
}
|
|
|
|
/// Makes the buffer the currently active one for the given target.
|
|
/// This will allow it to be the source of operations that act on a buffer
|
|
/// (Data, Map etc).
|
|
pub fn bind(&self, target: BufferTarget) {
|
|
unsafe {
|
|
glow_context().bind_buffer(target, Some(self.0));
|
|
}
|
|
}
|
|
|
|
pub fn set_data(&self, target: BufferTarget, data: &[u8], usage: BufferUsage) {
|
|
unsafe {
|
|
glow_context().buffer_data_u8_slice(target, data, usage);
|
|
}
|
|
}
|
|
|
|
pub fn re_set_data(&self, target: BufferTarget, data: &[u8]) {
|
|
unsafe {
|
|
glow_context().buffer_sub_data_u8_slice(target, 0, data);
|
|
}
|
|
}
|
|
|
|
/// Maps the memory in the buffer on the gpu to memory which the program
|
|
/// can access. The access flag will specify how the program plans to use the
|
|
/// returned data. It'll unmap itself once the returned value is dropped.
|
|
///
|
|
/// Warning: the passed length value is not checked in anyway so it is
|
|
/// possible to overrun the memory. It is up to the program to ensure this
|
|
/// length is valid.
|
|
pub fn map(&self, target: BufferTarget, access: Access, length: usize) -> MappedBuffer {
|
|
unsafe {
|
|
MappedBuffer {
|
|
inner: Vec::from_raw_parts(
|
|
glow_context().map_buffer_range(target, 0, length as i32, access) as *mut u8,
|
|
0,
|
|
length,
|
|
),
|
|
target,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for Buffer {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
glow_context().delete_buffer(self.0);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct MappedBuffer {
|
|
inner: Vec<u8>,
|
|
target: BufferTarget,
|
|
}
|
|
|
|
impl Deref for MappedBuffer {
|
|
type Target = Vec<u8>;
|
|
|
|
fn deref(&self) -> &Self::Target {
|
|
&self.inner
|
|
}
|
|
}
|
|
|
|
impl DerefMut for MappedBuffer {
|
|
fn deref_mut(&mut self) -> &mut Self::Target {
|
|
&mut self.inner
|
|
}
|
|
}
|
|
|
|
impl Drop for MappedBuffer {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
glow_context().unmap_buffer(self.target);
|
|
}
|
|
mem::forget(mem::replace(&mut self.inner, Vec::new()));
|
|
}
|
|
}
|
|
|
|
// Frame buffers
|
|
|
|
pub type Attachment = u32;
|
|
pub const COLOR_ATTACHMENT_0: Attachment = gl::COLOR_ATTACHMENT0;
|
|
pub const COLOR_ATTACHMENT_1: Attachment = gl::COLOR_ATTACHMENT1;
|
|
pub const COLOR_ATTACHMENT_2: Attachment = gl::COLOR_ATTACHMENT2;
|
|
pub const DEPTH_ATTACHMENT: Attachment = gl::DEPTH_ATTACHMENT;
|
|
|
|
#[derive(Default)]
|
|
pub struct Framebuffer(glow::Framebuffer);
|
|
|
|
pub fn check_framebuffer_status() {
|
|
unsafe {
|
|
let status = glow_context().check_framebuffer_status(gl::FRAMEBUFFER);
|
|
let s = match status {
|
|
gl::FRAMEBUFFER_UNDEFINED => "GL_FRAMEBUFFER_UNDEFINED",
|
|
gl::FRAMEBUFFER_INCOMPLETE_ATTACHMENT => "GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT",
|
|
gl::FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT => {
|
|
"GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT"
|
|
}
|
|
gl::FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER => "GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER",
|
|
gl::FRAMEBUFFER_INCOMPLETE_READ_BUFFER => "GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER",
|
|
gl::FRAMEBUFFER_UNSUPPORTED => "GL_FRAMEBUFFER_UNSUPPORTED",
|
|
gl::FRAMEBUFFER_INCOMPLETE_MULTISAMPLE => "GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE",
|
|
gl::FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS => "GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS",
|
|
|
|
gl::FRAMEBUFFER_COMPLETE => "GL_FRAMEBUFFER_COMPLETE",
|
|
//gl::FRAMEBUFFER_INCOMPLETE_DIMENSIONS => "GL_FRAMEBUFFER_INCOMPLETE_DIMENSIONS",
|
|
_ => "unknown",
|
|
};
|
|
|
|
if status != gl::FRAMEBUFFER_COMPLETE {
|
|
panic!(
|
|
"glBindFramebuffer failed, glCheckFrameBufferStatus(GL_FRAMEBUFFER) = {} {}",
|
|
status, s
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn check_gl_error() {
|
|
unsafe {
|
|
loop {
|
|
let err = glow_context().get_error();
|
|
if err == gl::NO_ERROR {
|
|
break;
|
|
}
|
|
|
|
error!("glGetError = {}", err);
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Framebuffer {
|
|
pub fn new() -> Framebuffer {
|
|
Framebuffer(unsafe {
|
|
glow_context()
|
|
.create_framebuffer()
|
|
.expect("create framebuffer failed")
|
|
})
|
|
}
|
|
|
|
pub fn bind(&self) {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::FRAMEBUFFER, Some(self.0));
|
|
}
|
|
}
|
|
|
|
pub fn bind_read(&self) {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::READ_FRAMEBUFFER, Some(self.0));
|
|
}
|
|
}
|
|
|
|
pub fn bind_draw(&self) {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::DRAW_FRAMEBUFFER, Some(self.0));
|
|
}
|
|
}
|
|
|
|
pub fn texture_2d(
|
|
&self,
|
|
attachment: Attachment,
|
|
target: TextureTarget,
|
|
tex: &Texture,
|
|
level: i32,
|
|
) {
|
|
unsafe {
|
|
glow_context().framebuffer_texture_2d(
|
|
gl::FRAMEBUFFER,
|
|
attachment,
|
|
target,
|
|
Some(tex.0),
|
|
level,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Drop for Framebuffer {
|
|
fn drop(&mut self) {
|
|
unsafe {
|
|
glow_context().delete_framebuffer(self.0);
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn unbind_framebuffer() {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::FRAMEBUFFER, None);
|
|
}
|
|
}
|
|
|
|
pub fn unbind_framebuffer_read() {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::READ_FRAMEBUFFER, None);
|
|
}
|
|
}
|
|
|
|
pub fn unbind_framebuffer_draw() {
|
|
unsafe {
|
|
glow_context().bind_framebuffer(gl::DRAW_FRAMEBUFFER, None);
|
|
}
|
|
}
|
|
|
|
pub fn draw_buffers(bufs: &[Attachment]) {
|
|
unsafe {
|
|
glow_context().draw_buffers(bufs);
|
|
}
|
|
}
|
|
|
|
pub fn bind_frag_data_location(p: &Program, cn: u32, name: &str) {
|
|
unsafe { glow_context().bind_frag_data_location(p.0, cn, name) }
|
|
}
|
|
|
|
pub fn blit_framebuffer(
|
|
sx0: i32,
|
|
sy0: i32,
|
|
sx1: i32,
|
|
sy1: i32,
|
|
dx0: i32,
|
|
dy0: i32,
|
|
dx1: i32,
|
|
dy1: i32,
|
|
mask: ClearFlags,
|
|
filter: TextureValue,
|
|
) {
|
|
unsafe {
|
|
glow_context().blit_framebuffer(
|
|
sx0,
|
|
sy0,
|
|
sx1,
|
|
sy1,
|
|
dx0,
|
|
dy0,
|
|
dx1,
|
|
dy1,
|
|
mask.internal(),
|
|
filter as u32,
|
|
);
|
|
}
|
|
}
|
|
|
|
pub type TargetBuffer = u32;
|
|
pub const COLOR: TargetBuffer = gl::COLOR;
|
|
|
|
pub fn clear_buffer(buffer: TargetBuffer, draw_buffer: u32, values: &mut [f32]) {
|
|
unsafe {
|
|
// TODO: why does glow have &mut on clear buffer values, why would it change the color?
|
|
glow_context().clear_buffer_f32_slice(buffer, draw_buffer, values);
|
|
}
|
|
}
|