2019-01-30 22:31:29 -05:00
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// pathfinder/gl/src/lib.rs
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//
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// Copyright © 2019 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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2019-03-05 17:51:29 -05:00
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//! An OpenGL implementation of the device abstraction.
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2019-03-08 19:52:47 -05:00
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use gl::types::{GLboolean, GLchar, GLenum, GLfloat, GLint, GLsizei, GLsizeiptr, GLuint, GLvoid};
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2019-03-05 17:51:29 -05:00
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use pathfinder_geometry::basic::point::Point2DI32;
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use pathfinder_geometry::basic::rect::RectI32;
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2019-03-05 17:51:29 -05:00
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use pathfinder_gpu::{BlendState, BufferTarget, BufferUploadMode, DepthFunc, Device, Primitive};
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use pathfinder_gpu::{RenderState, ShaderKind, StencilFunc, TextureFormat};
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use pathfinder_gpu::{UniformData, VertexAttrType};
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use pathfinder_simd::default::F32x4;
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2019-03-08 19:52:47 -05:00
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use rustache::{HashBuilder, Render};
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use std::ffi::CString;
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use std::io::Cursor;
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use std::mem;
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use std::ptr;
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use std::str;
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2019-03-05 17:51:29 -05:00
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use std::time::Duration;
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2019-03-08 19:52:47 -05:00
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pub struct GLDevice {
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version: GLVersion,
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}
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2019-03-05 17:51:29 -05:00
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impl GLDevice {
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#[inline]
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pub fn new(version: GLVersion) -> GLDevice {
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GLDevice { version }
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}
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fn set_texture_parameters(&self, texture: &GLTexture) {
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self.bind_texture(texture, 0);
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unsafe {
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gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MIN_FILTER, gl::LINEAR as GLint); ck();
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gl::TexParameteri(gl::TEXTURE_2D, gl::TEXTURE_MAG_FILTER, gl::LINEAR as GLint); ck();
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gl::TexParameteri(gl::TEXTURE_2D,
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gl::TEXTURE_WRAP_S,
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gl::CLAMP_TO_EDGE as GLint); ck();
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gl::TexParameteri(gl::TEXTURE_2D,
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gl::TEXTURE_WRAP_T,
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gl::CLAMP_TO_EDGE as GLint); ck();
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}
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}
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fn set_render_state(&self, render_state: &RenderState) {
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unsafe {
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// Set blend.
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match render_state.blend {
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BlendState::Off => {
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gl::Disable(gl::BLEND); ck();
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}
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BlendState::RGBOneAlphaOne => {
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gl::BlendEquation(gl::FUNC_ADD); ck();
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gl::BlendFunc(gl::ONE, gl::ONE); ck();
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gl::Enable(gl::BLEND); ck();
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}
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BlendState::RGBOneAlphaOneMinusSrcAlpha => {
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gl::BlendEquation(gl::FUNC_ADD); ck();
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gl::BlendFuncSeparate(gl::ONE,
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gl::ONE_MINUS_SRC_ALPHA,
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gl::ONE,
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gl::ONE); ck();
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gl::Enable(gl::BLEND); ck();
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}
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BlendState::RGBSrcAlphaAlphaOneMinusSrcAlpha => {
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gl::BlendEquation(gl::FUNC_ADD); ck();
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gl::BlendFuncSeparate(gl::SRC_ALPHA,
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gl::ONE_MINUS_SRC_ALPHA,
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gl::ONE,
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gl::ONE); ck();
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gl::Enable(gl::BLEND); ck();
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}
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}
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// Set depth.
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match render_state.depth {
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None => {
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gl::Disable(gl::DEPTH_TEST); ck();
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}
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Some(ref state) => {
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gl::DepthFunc(state.func.to_gl_depth_func()); ck();
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gl::DepthMask(state.write as GLboolean); ck();
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gl::Enable(gl::DEPTH_TEST); ck();
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}
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}
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// Set stencil.
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match render_state.stencil {
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None => {
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gl::Disable(gl::STENCIL_TEST); ck();
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}
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Some(ref state) => {
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gl::StencilFunc(state.func.to_gl_stencil_func(),
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state.reference as GLint,
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state.mask); ck();
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let (pass_action, write_mask) = if state.write {
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(gl::REPLACE, state.mask)
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} else {
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(gl::KEEP, 0)
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};
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gl::StencilOp(gl::KEEP, gl::KEEP, pass_action); ck();
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gl::StencilMask(write_mask);
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gl::Enable(gl::STENCIL_TEST); ck();
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}
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}
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// Set color mask.
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let color_mask = render_state.color_mask as GLboolean;
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gl::ColorMask(color_mask, color_mask, color_mask, color_mask); ck();
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}
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}
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fn reset_render_state(&self, render_state: &RenderState) {
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unsafe {
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match render_state.blend {
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BlendState::Off => {}
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BlendState::RGBOneAlphaOneMinusSrcAlpha |
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BlendState::RGBOneAlphaOne |
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BlendState::RGBSrcAlphaAlphaOneMinusSrcAlpha => {
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gl::Disable(gl::BLEND); ck();
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}
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}
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if render_state.depth.is_some() {
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gl::Disable(gl::DEPTH_TEST); ck();
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}
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if render_state.stencil.is_some() {
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gl::StencilMask(!0); ck();
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gl::Disable(gl::STENCIL_TEST); ck();
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}
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gl::ColorMask(gl::TRUE, gl::TRUE, gl::TRUE, gl::TRUE); ck();
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}
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}
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}
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impl Device for GLDevice {
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type Buffer = GLBuffer;
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type Framebuffer = GLFramebuffer;
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type Program = GLProgram;
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type Shader = GLShader;
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type Texture = GLTexture;
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type TimerQuery = GLTimerQuery;
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type Uniform = GLUniform;
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type VertexArray = GLVertexArray;
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type VertexAttr = GLVertexAttr;
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fn create_texture(&self, format: TextureFormat, size: Point2DI32) -> GLTexture {
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let (gl_internal_format, gl_format, gl_type);
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match format {
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TextureFormat::R16F => {
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gl_internal_format = gl::R16F as GLint;
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gl_format = gl::RED;
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gl_type = gl::HALF_FLOAT;
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}
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TextureFormat::RGBA8 => {
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gl_internal_format = gl::RGBA as GLint;
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gl_format = gl::RGBA;
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gl_type = gl::UNSIGNED_BYTE;
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}
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}
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let mut texture = GLTexture { gl_texture: 0, size };
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unsafe {
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gl::GenTextures(1, &mut texture.gl_texture); ck();
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self.bind_texture(&texture, 0);
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gl::TexImage2D(gl::TEXTURE_2D,
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0,
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gl_internal_format,
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size.x() as GLsizei,
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size.y() as GLsizei,
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0,
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gl_format,
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gl_type,
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ptr::null()); ck();
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}
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self.set_texture_parameters(&texture);
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texture
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}
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fn create_texture_from_data(&self, size: Point2DI32, data: &[u8]) -> GLTexture {
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assert!(data.len() >= size.x() as usize * size.y() as usize);
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let mut texture = GLTexture { gl_texture: 0, size };
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unsafe {
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gl::GenTextures(1, &mut texture.gl_texture); ck();
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self.bind_texture(&texture, 0);
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gl::TexImage2D(gl::TEXTURE_2D,
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0,
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gl::R8 as GLint,
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size.x() as GLsizei,
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size.y() as GLsizei,
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0,
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gl::RED,
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gl::UNSIGNED_BYTE,
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data.as_ptr() as *const GLvoid); ck();
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}
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self.set_texture_parameters(&texture);
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texture
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}
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fn create_shader_from_source(&self, name: &str, source: &[u8], kind: ShaderKind) -> GLShader {
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let glsl_version_spec = self.version.to_glsl_version_spec();
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let template_input = HashBuilder::new().insert("version", glsl_version_spec);
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let mut output = Cursor::new(vec![]);
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template_input.render(str::from_utf8(source).unwrap(), &mut output).unwrap();
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let source = output.into_inner();
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2019-03-05 17:51:29 -05:00
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let gl_shader_kind = match kind {
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ShaderKind::Vertex => gl::VERTEX_SHADER,
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ShaderKind::Fragment => gl::FRAGMENT_SHADER,
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};
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unsafe {
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let gl_shader = gl::CreateShader(gl_shader_kind); ck();
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gl::ShaderSource(gl_shader,
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1,
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[source.as_ptr() as *const GLchar].as_ptr(),
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[source.len() as GLint].as_ptr()); ck();
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gl::CompileShader(gl_shader); ck();
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let mut compile_status = 0;
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gl::GetShaderiv(gl_shader, gl::COMPILE_STATUS, &mut compile_status); ck();
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if compile_status != gl::TRUE as GLint {
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let mut info_log_length = 0;
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gl::GetShaderiv(gl_shader, gl::INFO_LOG_LENGTH, &mut info_log_length); ck();
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let mut info_log = vec![0; info_log_length as usize];
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gl::GetShaderInfoLog(gl_shader,
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info_log.len() as GLint,
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ptr::null_mut(),
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info_log.as_mut_ptr() as *mut GLchar); ck();
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eprintln!("Shader info log:\n{}", String::from_utf8_lossy(&info_log));
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panic!("{:?} shader '{}' compilation failed", kind, name);
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}
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GLShader { gl_shader }
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}
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}
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fn create_program_from_shaders(&self,
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name: &str,
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vertex_shader: GLShader,
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fragment_shader: GLShader)
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-> GLProgram {
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let gl_program;
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unsafe {
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gl_program = gl::CreateProgram(); ck();
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gl::AttachShader(gl_program, vertex_shader.gl_shader); ck();
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gl::AttachShader(gl_program, fragment_shader.gl_shader); ck();
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gl::LinkProgram(gl_program); ck();
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let mut link_status = 0;
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gl::GetProgramiv(gl_program, gl::LINK_STATUS, &mut link_status); ck();
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if link_status != gl::TRUE as GLint {
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let mut info_log_length = 0;
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gl::GetProgramiv(gl_program, gl::INFO_LOG_LENGTH, &mut info_log_length); ck();
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let mut info_log = vec![0; info_log_length as usize];
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gl::GetProgramInfoLog(gl_program,
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info_log.len() as GLint,
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ptr::null_mut(),
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info_log.as_mut_ptr() as *mut GLchar); ck();
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eprintln!("Program info log:\n{}", String::from_utf8_lossy(&info_log));
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panic!("Program '{}' linking failed", name);
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}
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}
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GLProgram { gl_program, vertex_shader, fragment_shader }
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}
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#[inline]
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fn create_vertex_array(&self) -> GLVertexArray {
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unsafe {
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let mut array = GLVertexArray { gl_vertex_array: 0 };
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gl::GenVertexArrays(1, &mut array.gl_vertex_array); ck();
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array
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}
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}
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fn get_vertex_attr(&self, program: &Self::Program, name: &str) -> GLVertexAttr {
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let name = CString::new(format!("a{}", name)).unwrap();
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let attr = unsafe {
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gl::GetAttribLocation(program.gl_program, name.as_ptr() as *const GLchar) as GLuint
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}; ck();
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GLVertexAttr { attr }
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}
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fn get_uniform(&self, program: &GLProgram, name: &str) -> GLUniform {
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let name = CString::new(format!("u{}", name)).unwrap();
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let location = unsafe {
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gl::GetUniformLocation(program.gl_program, name.as_ptr() as *const GLchar)
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}; ck();
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GLUniform { location }
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}
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fn use_program(&self, program: &Self::Program) {
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unsafe {
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gl::UseProgram(program.gl_program); ck();
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}
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}
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fn configure_float_vertex_attr(&self,
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attr: &GLVertexAttr,
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size: usize,
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attr_type: VertexAttrType,
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normalized: bool,
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stride: usize,
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offset: usize,
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divisor: u32) {
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unsafe {
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gl::VertexAttribPointer(attr.attr,
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size as GLint,
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attr_type.to_gl_type(),
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if normalized { gl::TRUE } else { gl::FALSE },
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stride as GLint,
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offset as *const GLvoid); ck();
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gl::VertexAttribDivisor(attr.attr, divisor); ck();
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gl::EnableVertexAttribArray(attr.attr); ck();
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}
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}
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fn configure_int_vertex_attr(&self,
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attr: &GLVertexAttr,
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size: usize,
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attr_type: VertexAttrType,
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stride: usize,
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offset: usize,
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divisor: u32) {
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unsafe {
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gl::VertexAttribIPointer(attr.attr,
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size as GLint,
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attr_type.to_gl_type(),
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stride as GLint,
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offset as *const GLvoid); ck();
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gl::VertexAttribDivisor(attr.attr, divisor); ck();
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gl::EnableVertexAttribArray(attr.attr); ck();
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}
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}
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|
|
|
|
fn set_uniform(&self, uniform: &Self::Uniform, data: UniformData) {
|
|
|
|
unsafe {
|
|
|
|
match data {
|
|
|
|
UniformData::Mat4(data) => {
|
|
|
|
assert_eq!(mem::size_of::<[F32x4; 4]>(), 4 * 4 * 4);
|
|
|
|
let data_ptr: *const F32x4 = data.as_ptr();
|
|
|
|
gl::UniformMatrix4fv(uniform.location,
|
|
|
|
1,
|
|
|
|
gl::FALSE,
|
|
|
|
data_ptr as *const GLfloat);
|
|
|
|
}
|
|
|
|
UniformData::Vec2(data) => {
|
|
|
|
gl::Uniform2f(uniform.location, data.x(), data.y()); ck();
|
|
|
|
}
|
|
|
|
UniformData::Vec4(data) => {
|
|
|
|
gl::Uniform4f(uniform.location, data.x(), data.y(), data.z(), data.w()); ck();
|
|
|
|
}
|
|
|
|
UniformData::TextureUnit(unit) => {
|
|
|
|
gl::Uniform1i(uniform.location, unit as GLint); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn create_framebuffer(&self, texture: GLTexture) -> GLFramebuffer {
|
|
|
|
let mut gl_framebuffer = 0;
|
|
|
|
unsafe {
|
|
|
|
gl::GenFramebuffers(1, &mut gl_framebuffer); ck();
|
|
|
|
gl::BindFramebuffer(gl::FRAMEBUFFER, gl_framebuffer); ck();
|
|
|
|
self.bind_texture(&texture, 0);
|
|
|
|
gl::FramebufferTexture2D(gl::FRAMEBUFFER,
|
|
|
|
gl::COLOR_ATTACHMENT0,
|
|
|
|
gl::TEXTURE_2D,
|
|
|
|
texture.gl_texture,
|
|
|
|
0); ck();
|
|
|
|
assert_eq!(gl::CheckFramebufferStatus(gl::FRAMEBUFFER), gl::FRAMEBUFFER_COMPLETE);
|
|
|
|
}
|
|
|
|
|
|
|
|
GLFramebuffer { gl_framebuffer, texture }
|
|
|
|
}
|
|
|
|
|
|
|
|
fn create_buffer(&self) -> GLBuffer {
|
|
|
|
unsafe {
|
|
|
|
let mut gl_buffer = 0;
|
|
|
|
gl::GenBuffers(1, &mut gl_buffer); ck();
|
|
|
|
GLBuffer { gl_buffer }
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn upload_to_buffer<T>(&self,
|
|
|
|
buffer: &GLBuffer,
|
|
|
|
data: &[T],
|
|
|
|
target: BufferTarget,
|
|
|
|
mode: BufferUploadMode) {
|
|
|
|
let target = match target {
|
|
|
|
BufferTarget::Vertex => gl::ARRAY_BUFFER,
|
|
|
|
BufferTarget::Index => gl::ELEMENT_ARRAY_BUFFER,
|
|
|
|
};
|
|
|
|
let mode = match mode {
|
|
|
|
BufferUploadMode::Static => gl::STATIC_DRAW,
|
|
|
|
BufferUploadMode::Dynamic => gl::DYNAMIC_DRAW,
|
|
|
|
};
|
|
|
|
unsafe {
|
|
|
|
gl::BindBuffer(target, buffer.gl_buffer); ck();
|
|
|
|
gl::BufferData(target,
|
|
|
|
(data.len() * mem::size_of::<T>()) as GLsizeiptr,
|
|
|
|
data.as_ptr() as *const GLvoid,
|
|
|
|
mode); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn framebuffer_texture<'f>(&self, framebuffer: &'f Self::Framebuffer) -> &'f Self::Texture {
|
|
|
|
&framebuffer.texture
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn texture_size(&self, texture: &Self::Texture) -> Point2DI32 {
|
|
|
|
texture.size
|
|
|
|
}
|
|
|
|
|
|
|
|
fn upload_to_texture(&self, texture: &Self::Texture, size: Point2DI32, data: &[u8]) {
|
|
|
|
assert!(data.len() >= size.x() as usize * size.y() as usize * 4);
|
|
|
|
unsafe {
|
|
|
|
self.bind_texture(texture, 0);
|
|
|
|
gl::TexImage2D(gl::TEXTURE_2D,
|
|
|
|
0,
|
|
|
|
gl::RGBA as GLint,
|
|
|
|
size.x() as GLsizei,
|
|
|
|
size.y() as GLsizei,
|
|
|
|
0,
|
|
|
|
gl::RGBA,
|
|
|
|
gl::UNSIGNED_BYTE,
|
|
|
|
data.as_ptr() as *const GLvoid); ck();
|
|
|
|
}
|
|
|
|
|
|
|
|
self.set_texture_parameters(texture);
|
|
|
|
}
|
|
|
|
|
|
|
|
fn read_pixels_from_default_framebuffer(&self, size: Point2DI32) -> Vec<u8> {
|
|
|
|
let mut pixels = vec![0; size.x() as usize * size.y() as usize * 4];
|
|
|
|
unsafe {
|
|
|
|
gl::BindFramebuffer(gl::FRAMEBUFFER, 0); ck();
|
|
|
|
gl::ReadPixels(0,
|
|
|
|
0,
|
|
|
|
size.x() as GLsizei,
|
|
|
|
size.y() as GLsizei,
|
|
|
|
gl::RGBA,
|
|
|
|
gl::UNSIGNED_BYTE,
|
|
|
|
pixels.as_mut_ptr() as *mut GLvoid); ck();
|
|
|
|
}
|
|
|
|
|
|
|
|
// Flip right-side-up.
|
|
|
|
let stride = size.x() as usize * 4;
|
|
|
|
for y in 0..(size.y() as usize / 2) {
|
|
|
|
let (index_a, index_b) = (y * stride, (size.y() as usize - y - 1) * stride);
|
|
|
|
for offset in 0..stride {
|
|
|
|
pixels.swap(index_a + offset, index_b + offset);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pixels
|
|
|
|
}
|
|
|
|
|
|
|
|
// TODO(pcwalton): Switch to `ColorF`!
|
|
|
|
fn clear(&self, color: Option<F32x4>, depth: Option<f32>, stencil: Option<u8>) {
|
|
|
|
unsafe {
|
|
|
|
let mut flags = 0;
|
|
|
|
if let Some(color) = color {
|
|
|
|
gl::ColorMask(gl::TRUE, gl::TRUE, gl::TRUE, gl::TRUE); ck();
|
|
|
|
gl::ClearColor(color.x(), color.y(), color.z(), color.w()); ck();
|
|
|
|
flags |= gl::COLOR_BUFFER_BIT;
|
|
|
|
}
|
|
|
|
if let Some(depth) = depth {
|
|
|
|
gl::DepthMask(gl::TRUE); ck();
|
2019-03-08 19:52:47 -05:00
|
|
|
gl::ClearDepthf(depth as _); ck(); // FIXME(pcwalton): GLES
|
2019-03-05 17:51:29 -05:00
|
|
|
flags |= gl::DEPTH_BUFFER_BIT;
|
|
|
|
}
|
|
|
|
if let Some(stencil) = stencil {
|
|
|
|
gl::StencilMask(!0); ck();
|
|
|
|
gl::ClearStencil(stencil as GLint); ck();
|
|
|
|
flags |= gl::STENCIL_BUFFER_BIT;
|
|
|
|
}
|
|
|
|
if flags != 0 {
|
|
|
|
gl::Clear(flags); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
fn draw_arrays(&self, primitive: Primitive, index_count: u32, render_state: &RenderState) {
|
|
|
|
self.set_render_state(render_state);
|
|
|
|
unsafe {
|
|
|
|
gl::DrawArrays(primitive.to_gl_primitive(), 0, index_count as GLsizei); ck();
|
|
|
|
}
|
|
|
|
self.reset_render_state(render_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
fn draw_elements(&self, primitive: Primitive, index_count: u32, render_state: &RenderState) {
|
|
|
|
self.set_render_state(render_state);
|
|
|
|
unsafe {
|
|
|
|
gl::DrawElements(primitive.to_gl_primitive(),
|
|
|
|
index_count as GLsizei,
|
|
|
|
gl::UNSIGNED_INT,
|
|
|
|
ptr::null()); ck();
|
|
|
|
}
|
|
|
|
self.reset_render_state(render_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
fn draw_arrays_instanced(&self,
|
|
|
|
primitive: Primitive,
|
|
|
|
index_count: u32,
|
|
|
|
instance_count: u32,
|
|
|
|
render_state: &RenderState) {
|
|
|
|
self.set_render_state(render_state);
|
|
|
|
unsafe {
|
|
|
|
gl::DrawArraysInstanced(primitive.to_gl_primitive(),
|
|
|
|
0,
|
|
|
|
index_count as GLsizei,
|
|
|
|
instance_count as GLsizei); ck();
|
|
|
|
}
|
|
|
|
self.reset_render_state(render_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn create_timer_query(&self) -> GLTimerQuery {
|
|
|
|
let mut query = GLTimerQuery { gl_query: 0 };
|
|
|
|
unsafe {
|
|
|
|
gl::GenQueries(1, &mut query.gl_query); ck();
|
|
|
|
}
|
|
|
|
query
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn begin_timer_query(&self, query: &Self::TimerQuery) {
|
|
|
|
unsafe {
|
|
|
|
gl::BeginQuery(gl::TIME_ELAPSED, query.gl_query); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn end_timer_query(&self, _: &Self::TimerQuery) {
|
|
|
|
unsafe {
|
|
|
|
gl::EndQuery(gl::TIME_ELAPSED); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn timer_query_is_available(&self, query: &Self::TimerQuery) -> bool {
|
|
|
|
unsafe {
|
|
|
|
let mut result = 0;
|
|
|
|
gl::GetQueryObjectiv(query.gl_query, gl::QUERY_RESULT_AVAILABLE, &mut result); ck();
|
|
|
|
result != gl::FALSE as GLint
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn get_timer_query(&self, query: &Self::TimerQuery) -> Duration {
|
|
|
|
unsafe {
|
|
|
|
let mut result = 0;
|
|
|
|
gl::GetQueryObjectui64v(query.gl_query, gl::QUERY_RESULT, &mut result); ck();
|
|
|
|
Duration::from_nanos(result)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn bind_vertex_array(&self, vertex_array: &GLVertexArray) {
|
|
|
|
unsafe {
|
|
|
|
gl::BindVertexArray(vertex_array.gl_vertex_array); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn bind_buffer(&self, buffer: &GLBuffer, target: BufferTarget) {
|
|
|
|
unsafe {
|
|
|
|
gl::BindBuffer(target.to_gl_target(), buffer.gl_buffer); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
2019-03-13 19:32:39 -04:00
|
|
|
fn bind_default_framebuffer(&self, viewport: RectI32) {
|
2019-03-05 17:51:29 -05:00
|
|
|
unsafe {
|
|
|
|
gl::BindFramebuffer(gl::FRAMEBUFFER, 0); ck();
|
2019-03-13 19:32:39 -04:00
|
|
|
gl::Viewport(viewport.origin().x(),
|
|
|
|
viewport.origin().y(),
|
|
|
|
viewport.size().x(),
|
|
|
|
viewport.size().y()); ck();
|
2019-03-05 17:51:29 -05:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn bind_framebuffer(&self, framebuffer: &GLFramebuffer) {
|
|
|
|
unsafe {
|
|
|
|
gl::BindFramebuffer(gl::FRAMEBUFFER, framebuffer.gl_framebuffer); ck();
|
|
|
|
gl::Viewport(0, 0, framebuffer.texture.size.x(), framebuffer.texture.size.y()); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[inline]
|
|
|
|
fn bind_texture(&self, texture: &GLTexture, unit: u32) {
|
|
|
|
unsafe {
|
|
|
|
gl::ActiveTexture(gl::TEXTURE0 + unit); ck();
|
|
|
|
gl::BindTexture(gl::TEXTURE_2D, texture.gl_texture); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLVertexArray {
|
|
|
|
pub gl_vertex_array: GLuint,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLVertexArray {
|
|
|
|
#[inline]
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteVertexArrays(1, &mut self.gl_vertex_array); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLVertexAttr {
|
|
|
|
attr: GLuint,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl GLVertexAttr {
|
|
|
|
pub fn configure_float(&self,
|
|
|
|
size: GLint,
|
|
|
|
gl_type: GLuint,
|
|
|
|
normalized: bool,
|
|
|
|
stride: GLsizei,
|
|
|
|
offset: usize,
|
|
|
|
divisor: GLuint) {
|
|
|
|
unsafe {
|
|
|
|
gl::VertexAttribPointer(self.attr,
|
|
|
|
size,
|
|
|
|
gl_type,
|
|
|
|
if normalized { gl::TRUE } else { gl::FALSE },
|
|
|
|
stride,
|
|
|
|
offset as *const GLvoid); ck();
|
|
|
|
gl::VertexAttribDivisor(self.attr, divisor); ck();
|
|
|
|
gl::EnableVertexAttribArray(self.attr); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn configure_int(&self,
|
|
|
|
size: GLint,
|
|
|
|
gl_type: GLuint,
|
|
|
|
stride: GLsizei,
|
|
|
|
offset: usize,
|
|
|
|
divisor: GLuint) {
|
|
|
|
unsafe {
|
|
|
|
gl::VertexAttribIPointer(self.attr,
|
|
|
|
size,
|
|
|
|
gl_type,
|
|
|
|
stride,
|
|
|
|
offset as *const GLvoid); ck();
|
|
|
|
gl::VertexAttribDivisor(self.attr, divisor); ck();
|
|
|
|
gl::EnableVertexAttribArray(self.attr); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLFramebuffer {
|
|
|
|
pub gl_framebuffer: GLuint,
|
|
|
|
pub texture: GLTexture,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLFramebuffer {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteFramebuffers(1, &mut self.gl_framebuffer); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLBuffer {
|
|
|
|
pub gl_buffer: GLuint,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLBuffer {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteBuffers(1, &mut self.gl_buffer); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[derive(Debug)]
|
|
|
|
pub struct GLUniform {
|
|
|
|
pub location: GLint,
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLProgram {
|
|
|
|
pub gl_program: GLuint,
|
|
|
|
#[allow(dead_code)]
|
|
|
|
vertex_shader: GLShader,
|
|
|
|
#[allow(dead_code)]
|
|
|
|
fragment_shader: GLShader,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLProgram {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteProgram(self.gl_program); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLShader {
|
|
|
|
gl_shader: GLuint,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLShader {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteShader(self.gl_shader); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLTexture {
|
|
|
|
gl_texture: GLuint,
|
|
|
|
pub size: Point2DI32,
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct GLTimerQuery {
|
|
|
|
gl_query: GLuint,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Drop for GLTimerQuery {
|
|
|
|
#[inline]
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
gl::DeleteQueries(1, &mut self.gl_query); ck();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
trait BufferTargetExt {
|
|
|
|
fn to_gl_target(self) -> GLuint;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl BufferTargetExt for BufferTarget {
|
|
|
|
fn to_gl_target(self) -> GLuint {
|
|
|
|
match self {
|
|
|
|
BufferTarget::Vertex => gl::ARRAY_BUFFER,
|
|
|
|
BufferTarget::Index => gl::ELEMENT_ARRAY_BUFFER,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
trait DepthFuncExt {
|
|
|
|
fn to_gl_depth_func(self) -> GLenum;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl DepthFuncExt for DepthFunc {
|
|
|
|
fn to_gl_depth_func(self) -> GLenum {
|
|
|
|
match self {
|
|
|
|
DepthFunc::Less => gl::LESS,
|
|
|
|
DepthFunc::Always => gl::ALWAYS,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
trait PrimitiveExt {
|
|
|
|
fn to_gl_primitive(self) -> GLuint;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl PrimitiveExt for Primitive {
|
|
|
|
fn to_gl_primitive(self) -> GLuint {
|
|
|
|
match self {
|
|
|
|
Primitive::Triangles => gl::TRIANGLES,
|
|
|
|
Primitive::TriangleFan => gl::TRIANGLE_FAN,
|
|
|
|
Primitive::Lines => gl::LINES,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
trait StencilFuncExt {
|
|
|
|
fn to_gl_stencil_func(self) -> GLenum;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl StencilFuncExt for StencilFunc {
|
|
|
|
fn to_gl_stencil_func(self) -> GLenum {
|
|
|
|
match self {
|
|
|
|
StencilFunc::Always => gl::ALWAYS,
|
|
|
|
StencilFunc::Equal => gl::EQUAL,
|
|
|
|
StencilFunc::NotEqual => gl::NOTEQUAL,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
trait VertexAttrTypeExt {
|
|
|
|
fn to_gl_type(self) -> GLuint;
|
|
|
|
}
|
|
|
|
|
|
|
|
impl VertexAttrTypeExt for VertexAttrType {
|
|
|
|
fn to_gl_type(self) -> GLuint {
|
|
|
|
match self {
|
|
|
|
VertexAttrType::F32 => gl::FLOAT,
|
|
|
|
VertexAttrType::I16 => gl::SHORT,
|
|
|
|
VertexAttrType::U16 => gl::UNSIGNED_SHORT,
|
|
|
|
VertexAttrType::U8 => gl::UNSIGNED_BYTE,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-03-08 19:52:47 -05:00
|
|
|
/// The version/dialect of OpenGL we should render with.
|
|
|
|
pub enum GLVersion {
|
|
|
|
/// OpenGL 3.0+, core profile.
|
|
|
|
GL3,
|
|
|
|
/// OpenGL ES 3.0+.
|
|
|
|
GLES3,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl GLVersion {
|
|
|
|
fn to_glsl_version_spec(&self) -> &'static str {
|
|
|
|
match *self {
|
|
|
|
GLVersion::GL3 => "330",
|
|
|
|
GLVersion::GLES3 => "300 es",
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2019-03-05 17:51:29 -05:00
|
|
|
// Error checking
|
|
|
|
|
|
|
|
#[cfg(debug)]
|
|
|
|
fn ck() {
|
|
|
|
unsafe {
|
|
|
|
let err = gl::GetError();
|
|
|
|
if err != 0 {
|
|
|
|
panic!("GL error: 0x{:x}", err);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#[cfg(not(debug))]
|
|
|
|
fn ck() {}
|