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Propagate errors when initializing WebRender instead of panicking #768

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merged 1 commit into from Feb 2, 2017
+330 −281
Merged

Propagate errors when initializing WebRender instead of panicking #768

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2 sample/src/main.rs
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@@ -84,7 +84,7 @@ fn main() {
.. Default::default()
};

let (mut renderer, sender) = webrender::renderer::Renderer::new(opts);
let (mut renderer, sender) = webrender::renderer::Renderer::new(opts).unwrap();
let api = sender.create_api();

let notifier = Box::new(Notifier::new(window.create_window_proxy()));
4 webrender/src/debug_render.rs
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@@ -28,8 +28,8 @@ pub struct DebugRenderer {

impl DebugRenderer {
pub fn new(device: &mut Device) -> DebugRenderer {
let font_program_id = device.create_program("debug_font", "shared_other", VertexFormat::DebugFont);
let color_program_id = device.create_program("debug_color", "shared_other", VertexFormat::DebugColor);
let font_program_id = device.create_program("debug_font", "shared_other", VertexFormat::DebugFont).unwrap();
let color_program_id = device.create_program("debug_color", "shared_other", VertexFormat::DebugColor).unwrap();

let font_vao = device.create_vao(VertexFormat::DebugFont, 32);
let line_vao = device.create_vao(VertexFormat::DebugColor, 32);
239 webrender/src/device.rs
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@@ -375,8 +375,7 @@ impl Program {
fn attach_and_bind_shaders(&mut self,
vs_id: gl::GLuint,
fs_id: gl::GLuint,
vertex_format: VertexFormat,
panic_on_fail: bool) -> bool {
vertex_format: VertexFormat) -> Result<(), ShaderError> {
gl::attach_shader(self.id, vs_id);
gl::attach_shader(self.id, fs_id);

@@ -417,17 +416,14 @@ impl Program {

gl::link_program(self.id);
if gl::get_program_iv(self.id, gl::LINK_STATUS) == (0 as gl::GLint) {
println!("Failed to link shader program: {}", gl::get_program_info_log(self.id));
let error_log = gl::get_program_info_log(self.id);
println!("Failed to link shader program: {}", error_log);
gl::detach_shader(self.id, vs_id);
gl::detach_shader(self.id, fs_id);
if panic_on_fail {
panic!("-- Program link failed - exiting --");
}
false
} else {
//println!("{}", gl::get_program_info_log(self.id));
true
return Err(ShaderError::Link(error_log));
}

Ok(())

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@kvark

kvark Jan 26, 2017

Member

similarly with shader compiling, we should still print out warnings on the successful builds too
}
}

@@ -793,6 +789,12 @@ pub struct Capabilities {
pub supports_multisampling: bool,
}

#[derive(Clone, Debug)]
pub enum ShaderError {
Compilation(String, String), // name, error mssage
Link(String), // error message
}

pub struct Device {
// device state
bound_textures: [TextureId; 16],
@@ -871,9 +873,8 @@ impl Device {
pub fn compile_shader(name: &str,
source_str: &str,
shader_type: gl::GLenum,
shader_preamble: &[String],
panic_on_fail: bool)
-> Option<gl::GLuint> {
shader_preamble: &[String])
-> Result<gl::GLuint, ShaderError> {
debug!("compile {:?}", name);

let mut s = String::new();
@@ -891,16 +892,12 @@ impl Device {
let log = gl::get_shader_info_log(id);
if gl::get_shader_iv(id, gl::COMPILE_STATUS) == (0 as gl::GLint) {
println!("Failed to compile shader: {:?}\n{}", name, log);
if panic_on_fail {
panic!("-- Shader compile failed - exiting --");
}

None
Err(ShaderError::Compilation(name.to_string(), log))
} else {
if !log.is_empty() {
println!("Warnings detected on shader: {:?}\n{}", name, log);
}
Some(id)
Ok(id)
}
}

@@ -1334,15 +1331,15 @@ impl Device {
pub fn create_program(&mut self,
base_filename: &str,
include_filename: &str,
vertex_format: VertexFormat) -> ProgramId {
vertex_format: VertexFormat) -> Result<ProgramId, ShaderError> {
self.create_program_with_prefix(base_filename, &[include_filename], None, vertex_format)
}

pub fn create_program_with_prefix(&mut self,
base_filename: &str,
include_filenames: &[&str],
prefix: Option<String>,
vertex_format: VertexFormat) -> ProgramId {
vertex_format: VertexFormat) -> Result<ProgramId, ShaderError> {
debug_assert!(self.inside_frame);

let pid = gl::create_program();
@@ -1379,16 +1376,15 @@ impl Device {
debug_assert!(self.programs.contains_key(&program_id) == false);
self.programs.insert(program_id, program);

self.load_program(program_id, include, vertex_format, true);
try!{ self.load_program(program_id, include, vertex_format) };

program_id
Ok(program_id)
}

fn load_program(&mut self,
program_id: ProgramId,
include: String,
vertex_format: VertexFormat,
panic_on_fail: bool) {
vertex_format: VertexFormat) -> Result<(), ShaderError> {
debug_assert!(self.inside_frame);

let program = self.programs.get_mut(&program_id).unwrap();
@@ -1411,127 +1407,114 @@ impl Device {
fs_preamble.push(include);

// todo(gw): store shader ids so they can be freed!
let vs_id = Device::compile_shader(&program.name,
&program.vs_source,
gl::VERTEX_SHADER,
&vs_preamble,
panic_on_fail);
let fs_id = Device::compile_shader(&program.name,
&program.fs_source,
gl::FRAGMENT_SHADER,
&fs_preamble,
panic_on_fail);

match (vs_id, fs_id) {
(Some(vs_id), None) => {
println!("FAILED to load fs - falling back to previous!");
let vs_id = try!{ Device::compile_shader(&program.name,
&program.vs_source,
gl::VERTEX_SHADER,
&vs_preamble) };
let fs_id = try!{ Device::compile_shader(&program.name,
&program.fs_source,
gl::FRAGMENT_SHADER,
&fs_preamble) };

if let Some(vs_id) = program.vs_id {
gl::detach_shader(program.id, vs_id);
}

if let Some(fs_id) = program.fs_id {
gl::detach_shader(program.id, fs_id);
}

if let Err(bind_error) = program.attach_and_bind_shaders(vs_id, fs_id, vertex_format) {
if let (Some(vs_id), Some(fs_id)) = (program.vs_id, program.fs_id) {
try! { program.attach_and_bind_shaders(vs_id, fs_id, vertex_format) };
} else {
return Err(bind_error);
}
} else {
if let Some(vs_id) = program.vs_id {
gl::delete_shader(vs_id);
}
(None, Some(fs_id)) => {
println!("FAILED to load vs - falling back to previous!");

if let Some(fs_id) = program.fs_id {
gl::delete_shader(fs_id);
}
(None, None) => {
println!("FAILED to load vs/fs - falling back to previous!");
}
(Some(vs_id), Some(fs_id)) => {
if let Some(vs_id) = program.vs_id {
gl::detach_shader(program.id, vs_id);
}

if let Some(fs_id) = program.fs_id {
gl::detach_shader(program.id, fs_id);
}

if program.attach_and_bind_shaders(vs_id, fs_id, vertex_format, panic_on_fail) {
if let Some(vs_id) = program.vs_id {
gl::delete_shader(vs_id);
}

if let Some(fs_id) = program.fs_id {
gl::delete_shader(fs_id);
}

program.vs_id = Some(vs_id);
program.fs_id = Some(fs_id);
} else {
let vs_id = program.vs_id.unwrap();
let fs_id = program.fs_id.unwrap();
program.attach_and_bind_shaders(vs_id, fs_id, vertex_format, true);
}
program.vs_id = Some(vs_id);
program.fs_id = Some(fs_id);
}

program.u_transform = gl::get_uniform_location(program.id, "uTransform");
program.u_device_pixel_ratio = gl::get_uniform_location(program.id, "uDevicePixelRatio");
program.u_transform = gl::get_uniform_location(program.id, "uTransform");
program.u_device_pixel_ratio = gl::get_uniform_location(program.id, "uDevicePixelRatio");

program_id.bind();
let u_color_0 = gl::get_uniform_location(program.id, "sColor0");
if u_color_0 != -1 {
gl::uniform_1i(u_color_0, TextureSampler::Color0 as i32);
}
let u_color1 = gl::get_uniform_location(program.id, "sColor1");
if u_color1 != -1 {
gl::uniform_1i(u_color1, TextureSampler::Color1 as i32);
}
let u_color_2 = gl::get_uniform_location(program.id, "sColor2");
if u_color_2 != -1 {
gl::uniform_1i(u_color_2, TextureSampler::Color2 as i32);
}
let u_mask = gl::get_uniform_location(program.id, "sMask");
if u_mask != -1 {
gl::uniform_1i(u_mask, TextureSampler::Mask as i32);
}
program_id.bind();
let u_color_0 = gl::get_uniform_location(program.id, "sColor0");
if u_color_0 != -1 {
gl::uniform_1i(u_color_0, TextureSampler::Color0 as i32);
}
let u_color1 = gl::get_uniform_location(program.id, "sColor1");
if u_color1 != -1 {
gl::uniform_1i(u_color1, TextureSampler::Color1 as i32);
}
let u_color_2 = gl::get_uniform_location(program.id, "sColor2");
if u_color_2 != -1 {
gl::uniform_1i(u_color_2, TextureSampler::Color2 as i32);
}
let u_mask = gl::get_uniform_location(program.id, "sMask");
if u_mask != -1 {
gl::uniform_1i(u_mask, TextureSampler::Mask as i32);
}

let u_cache = gl::get_uniform_location(program.id, "sCache");
if u_cache != -1 {
gl::uniform_1i(u_cache, TextureSampler::Cache as i32);
}
let u_cache = gl::get_uniform_location(program.id, "sCache");
if u_cache != -1 {
gl::uniform_1i(u_cache, TextureSampler::Cache as i32);
}

let u_layers = gl::get_uniform_location(program.id, "sLayers");
if u_layers != -1 {
gl::uniform_1i(u_layers, TextureSampler::Layers as i32);
}
let u_layers = gl::get_uniform_location(program.id, "sLayers");
if u_layers != -1 {
gl::uniform_1i(u_layers, TextureSampler::Layers as i32);
}

let u_tasks = gl::get_uniform_location(program.id, "sRenderTasks");
if u_tasks != -1 {
gl::uniform_1i(u_tasks, TextureSampler::RenderTasks as i32);
}
let u_tasks = gl::get_uniform_location(program.id, "sRenderTasks");
if u_tasks != -1 {
gl::uniform_1i(u_tasks, TextureSampler::RenderTasks as i32);
}

let u_prim_geom = gl::get_uniform_location(program.id, "sPrimGeometry");
if u_prim_geom != -1 {
gl::uniform_1i(u_prim_geom, TextureSampler::Geometry as i32);
}
let u_prim_geom = gl::get_uniform_location(program.id, "sPrimGeometry");
if u_prim_geom != -1 {
gl::uniform_1i(u_prim_geom, TextureSampler::Geometry as i32);
}

let u_data16 = gl::get_uniform_location(program.id, "sData16");
if u_data16 != -1 {
gl::uniform_1i(u_data16, TextureSampler::Data16 as i32);
}
let u_data16 = gl::get_uniform_location(program.id, "sData16");
if u_data16 != -1 {
gl::uniform_1i(u_data16, TextureSampler::Data16 as i32);
}

let u_data32 = gl::get_uniform_location(program.id, "sData32");
if u_data32 != -1 {
gl::uniform_1i(u_data32, TextureSampler::Data32 as i32);
}
let u_data32 = gl::get_uniform_location(program.id, "sData32");
if u_data32 != -1 {
gl::uniform_1i(u_data32, TextureSampler::Data32 as i32);
}

let u_data64 = gl::get_uniform_location(program.id, "sData64");
if u_data64 != -1 {
gl::uniform_1i(u_data64, TextureSampler::Data64 as i32);
}
let u_data64 = gl::get_uniform_location(program.id, "sData64");
if u_data64 != -1 {
gl::uniform_1i(u_data64, TextureSampler::Data64 as i32);
}

let u_data128 = gl::get_uniform_location(program.id, "sData128");
if u_data128 != -1 {
gl::uniform_1i(u_data128, TextureSampler::Data128 as i32);
}
let u_data128 = gl::get_uniform_location(program.id, "sData128");
if u_data128 != -1 {
gl::uniform_1i(u_data128, TextureSampler::Data128 as i32);
}

let u_resource_rects = gl::get_uniform_location(program.id, "sResourceRects");
if u_resource_rects != -1 {
gl::uniform_1i(u_resource_rects, TextureSampler::ResourceRects as i32);
}
let u_resource_rects = gl::get_uniform_location(program.id, "sResourceRects");
if u_resource_rects != -1 {
gl::uniform_1i(u_resource_rects, TextureSampler::ResourceRects as i32);
}

let u_gradients = gl::get_uniform_location(program.id, "sGradients");
if u_gradients != -1 {
gl::uniform_1i(u_gradients, TextureSampler::Gradients as i32);
}
}
let u_gradients = gl::get_uniform_location(program.id, "sGradients");
if u_gradients != -1 {
gl::uniform_1i(u_gradients, TextureSampler::Gradients as i32);
}

Ok(())
}

/*
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