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annotate examples/menu.rs @ 751:eab7dde1164f

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examples: Add music playback to the menu example
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Tue, 25 Feb 2020 19:37:19 +0100
parents 31897f650d2d
children a662dddd4a2b
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1 use ears::{Music, AudioController};
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2 use luminance::blending::{Equation, Factor};
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3 use luminance::context::GraphicsContext;
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4 use luminance::pipeline::{BoundTexture, PipelineState};
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5 use luminance::pixel::NormUnsigned;
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6 use luminance::render_state::RenderState;
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7 use luminance::shader::program::{Program, Uniform};
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8 use luminance::tess::{Mode, TessBuilder};
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9 use luminance::texture::{Dim2, Flat};
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10 use luminance_derive::{Semantics, Vertex, UniformInterface};
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11 use luminance_glfw::{Action, Key, WindowEvent, GlfwSurface, Surface, WindowDim, WindowOpt};
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12 use touhou::th06::pbg3;
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13 use touhou::th06::anm0::Anm0;
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14 use touhou::th06::anm0_vm::{AnmRunner, Sprite, Vertex as FakeVertex};
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15 use touhou::util::math::{perspective, setup_camera, ortho_2d};
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16 use touhou::util::prng::Prng;
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17 use std::cell::RefCell;
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18 use std::rc::Rc;
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19 use std::env;
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20 use std::path::Path;
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21
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22 #[path = "common.rs"]
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23 mod common;
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24 use common::LoadedTexture;
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25
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26 const VS: &str = r#"
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27 in ivec3 in_position;
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28 in vec2 in_texcoord;
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29 in vec4 in_color;
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30
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31 uniform mat4 mvp;
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32
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33 out vec2 texcoord;
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34 out vec4 color;
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35
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36 void main()
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37 {
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38 gl_Position = mvp * vec4(vec3(in_position), 1.0);
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39 texcoord = vec2(in_texcoord);
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40
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41 // It’s already normalized from the u8 being passed.
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42 color = in_color;
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43 }
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44 "#;
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45
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46 const FS: &str = r#"
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47 in vec2 texcoord;
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48 in vec4 color;
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49
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50 uniform sampler2D color_map;
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51
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52 out vec4 frag_color;
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53
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54 void main()
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55 {
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56 frag_color = texture(color_map, texcoord) * color;
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57 }
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58 "#;
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59
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60 #[derive(Clone, Copy, Debug, Eq, PartialEq, Semantics)]
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61 pub enum Semantics {
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62 #[sem(name = "in_position", repr = "[i16; 3]", wrapper = "VertexPosition")]
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63 Position,
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64
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65 #[sem(name = "in_texcoord", repr = "[f32; 2]", wrapper = "VertexTexcoord")]
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66 Texcoord,
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67
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68 #[sem(name = "in_color", repr = "[u8; 4]", wrapper = "VertexColor")]
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69 Color,
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70 }
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71
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72 #[repr(C)]
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73 #[derive(Clone, Copy, Debug, PartialEq, Vertex)]
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74 #[vertex(sem = "Semantics")]
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75 struct Vertex {
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76 pos: VertexPosition,
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77 uv: VertexTexcoord,
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78 #[vertex(normalized = "true")]
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79 rgba: VertexColor,
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80 }
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81
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82 #[derive(UniformInterface)]
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83 struct ShaderInterface {
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84 // the 'static lifetime acts as “anything” here
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85 color_map: Uniform<&'static BoundTexture<'static, Flat, Dim2, NormUnsigned>>,
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86
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87 #[uniform(name = "mvp")]
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88 mvp: Uniform<[[f32; 4]; 4]>,
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89 }
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90
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91 const DEFAULT_VERTICES: [Vertex; 4] = [
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92 Vertex::new(VertexPosition::new([0, 0, 0]), VertexTexcoord::new([0., 0.]), VertexColor::new([255, 255, 255, 255])),
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93 Vertex::new(VertexPosition::new([640, 0, 0]), VertexTexcoord::new([1., 0.]), VertexColor::new([255, 255, 255, 255])),
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94 Vertex::new(VertexPosition::new([640, 480, 0]), VertexTexcoord::new([1., 1.]), VertexColor::new([255, 255, 255, 255])),
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95 Vertex::new(VertexPosition::new([0, 480, 0]), VertexTexcoord::new([0., 1.]), VertexColor::new([255, 255, 255, 255])),
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96 ];
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97
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98 fn main() {
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99 // Parse arguments.
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100 let args: Vec<_> = env::args().collect();
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101 if args.len() != 2 {
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102 eprintln!("Usage: {} <unarchived directory>", args[0]);
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103 return;
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104 }
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105 let directory = Path::new(&args[1]);
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106
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107 let in_dat = directory.join("IN.DAT");
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108 // Since GLFW can be slow to create its window, let’s decode the splash screen in another
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109 // thread in the meantime.
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110 let jpeg_thread = std::thread::spawn(|| {
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111 let mut in_pbg3 = pbg3::from_path_buffered(in_dat).expect("IN.DAT present");
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112 let jpeg = in_pbg3.get_file("th06logo.jpg", true).expect("th06logo.jpg in IN.DAT");
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113 let image = common::load_from_data(&jpeg).expect("th06logo.jpg decodable");
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114 image
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115 });
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116
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117 let music_filename = directory.join("bgm").join("th06_01.wav");
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118 let music_filename = music_filename.to_str().expect("non-UTF-8 music filename");
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119 let music = match Music::new(music_filename) {
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120 Ok(mut music) => {
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121 music.set_looping(true);
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122 music.play();
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123 music
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124 }
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125 Err(err) => {
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126 eprintln!("Impossible to open or play music file: {}", err);
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127 return;
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128 }
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129 };
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130
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131 let mut surface = GlfwSurface::new(WindowDim::Windowed(640, 480), "Touhou", WindowOpt::default()).expect("GLFW window");
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132
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133 let image = jpeg_thread.join().expect("image loading");
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134 let background = common::upload_texture_from_rgb_image(&mut surface, image).expect("upload data to texture");
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135
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136 let mut background = match background {
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137 LoadedTexture::Rgb(tex) => tex,
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138 LoadedTexture::Rgba(tex) => unreachable!(),
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139 };
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140
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141 // set the uniform interface to our type so that we can read textures from the shader
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142 let program =
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143 Program::<Semantics, (), ShaderInterface>::from_strings(None, VS, None, FS).expect("program creation").ignore_warnings();
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144
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145 let mut tess = TessBuilder::new(&mut surface)
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146 .add_vertices(DEFAULT_VERTICES)
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147 .set_mode(Mode::TriangleFan)
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148 .build()
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149 .unwrap();
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150
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151 let tl_dat = directory.join("TL.DAT");
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152 let mut tl_pbg3 = pbg3::from_path_buffered(tl_dat).expect("TL.DAT present");
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153
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154 let mut back_buffer = surface.back_buffer().unwrap();
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155 let mut resize = false;
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156 let mut frame = 0;
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157 let mut z_pressed = false;
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158 let mut x_pressed = false;
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159
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160 'app: loop {
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161 for event in surface.poll_events() {
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162 match event {
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163 WindowEvent::Close | WindowEvent::Key(Key::Escape, _, Action::Release, _) => break 'app,
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164
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165 WindowEvent::Key(Key::Z, _, Action::Press, _) => z_pressed = true,
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166 WindowEvent::Key(Key::X, _, Action::Press, _) => x_pressed = true,
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167
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168 WindowEvent::FramebufferSize(..) => {
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169 resize = true;
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170 }
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171
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172 _ => (),
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173 }
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174 }
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175
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176 if resize {
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177 back_buffer = surface.back_buffer().unwrap();
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178 resize = false;
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179 }
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180
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181 frame += 1;
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182 if frame == 60 {
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183 let jpeg = tl_pbg3.get_file("title00.jpg", true).expect("title00.jpg in TL.DAT");
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184 let image = common::load_from_data(&jpeg).expect("th06logo.jpg decodable");
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185 common::reupload_texture_from_rgb_image(&mut background, image).expect("upload data to texture");
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186 }
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187
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188 if frame >= 60 && z_pressed {
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189 let jpeg = tl_pbg3.get_file("select00.jpg", true).expect("select00.jpg in TL.DAT");
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190 let image = common::load_from_data(&jpeg).expect("select00.jpg decodable");
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191 common::reupload_texture_from_rgb_image(&mut background, image).expect("upload data to texture");
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192 }
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193
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194 // here, we need to bind the pipeline variable; it will enable us to bind the texture to the GPU
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195 // and use it in the shader
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196 surface
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197 .pipeline_builder()
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198 .pipeline(&back_buffer, &PipelineState::default(), |pipeline, mut shd_gate| {
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199 // bind our fancy texture to the GPU: it gives us a bound texture we can use with the shader
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200 let tex = pipeline.bind_texture(&background);
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201
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202 shd_gate.shade(&program, |iface, mut rdr_gate| {
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203 // update the texture; strictly speaking, this update doesn’t do much: it just tells the GPU
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204 // to use the texture passed as argument (no allocation or copy is performed)
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205 iface.color_map.update(&tex);
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206 let mvp = ortho_2d(0., 640., 480., 0.);
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207 // TODO: check how to pass by reference.
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208 iface.mvp.update(*mvp.borrow_inner());
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209
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210 let render_state = RenderState::default()
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211 .set_blending((Equation::Additive, Factor::SrcAlpha, Factor::SrcAlphaComplement));
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212
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213 rdr_gate.render(&render_state, |mut tess_gate| {
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214 tess_gate.render(&tess);
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215 });
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216 });
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217 });
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218
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219 surface.swap_buffers();
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220 }
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221 }