Refactored and setup for better analyzer.

Makefile

@@ -33,7 +33,7 @@ debug: build
 	gdb --nx -x .gdbinit --ex run --args builddir/bezos_tests
 
 debug_run: build
-	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/bezos_tests
+	gdb --nx -x .gdbinit --batch --ex run --ex bt --ex q --args builddir/bezos
 
 clean:
 	meson compile --clean -C builddir

TODO.md

@@ -0,0 +1,2 @@
+* Make the Deck::analyze do a more thorough analysis/check.
+* Get the code online.

lua/builder_test.lua

@@ -31,7 +31,10 @@ slide{
   t [[
   Makes programming content
   more interesting.
-  ]]
+  ]],
+  image{
+    src="assets/test.jpg"
+  }
 }
 
 slide{

src/bezos.cpp

@@ -40,7 +40,9 @@ namespace Bezos {
 
     lua.script_file(file);
 
+    // BUG: don't do this, instead set the builder on the lua script
     Builder builder = lua["DECK"];
+
     return builder.deck;
   }
 

src/document.cpp

@@ -1,2 +1,26 @@
 #include "document.hpp"
 #include <fmt/core.h>
+
+void Deck::analyze() {
+  // Needed work:
+  // * Character mapping for the fonts
+  // * Checks for errors
+  // * Resource prep: images, fonts, font glyphs
+  for(auto& slide : slides) {
+    for(auto& node : slide.content) {
+      switch(node.type) {
+        case NodeType::IMAGE: {
+          dbc::check(node.image == nullptr, "Got an image node that's already setup.");
+          node.image = std::make_shared<Image>();
+          std::string src = std::any_cast<std::string>(node.config.at("src"));
+          node.image->load(src);
+          break;
+        }
+        default:
+          fmt::println("Skipping unknown node");
+      }
+    }
+  }
+
+  analyzed = true;
+}

src/document.hpp

@@ -41,4 +41,7 @@ struct Slide {
 struct Deck {
   std::vector<Slide> slides{};
   std::unordered_map<std::string, std::any> config{};
+  bool analyzed = false;
+
+  void analyze();
 };

src/image.cpp

@@ -59,6 +59,9 @@ void Image::render() {
   glBindVertexArray(image_vao);
   glBindTexture(GL_TEXTURE_2D, texture_id);
   glDrawArrays(GL_TRIANGLES, 0, 6);
+
+  glBindTexture(GL_TEXTURE_2D, 0);
+  glBindVertexArray(0);
 }
 
 Image::Image() {
@@ -76,4 +79,5 @@ Image::Image() {
   // color attribute
   glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), (void*)(2 * sizeof(float)));
   glEnableVertexAttribArray(1);
+  glBindVertexArray(0);
 }

src/main.cpp

@@ -1,116 +1,20 @@
 #define _USE_MATH_DEFINES
-#include <glm/glm.hpp>
-#include <glm/gtc/matrix_transform.hpp>
-#include <glm/gtc/type_ptr.hpp>
-#include <stb_image.h>
 #include <fmt/core.h>
-#include <glad/glad.h>
-#include <GLFW/glfw3.h>
 #include "config.hpp"
 #include "render.hpp"
 #include "bezos.hpp"
 
-void framebuffer_size_callback(GLFWwindow *window, int width, int height);
-
-
-void init_glfw() {
-  glfwInit();
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
-  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
-  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
-
-#ifdef __APPLE__
-  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
-#endif
-}
-
-void framebuffer_size_callback(GLFWwindow *, int width, int height) {
-  glViewport(0, 0, width, height);
-}
-
-void mouse_callback(GLFWwindow *window, double xpos, double ypos) {
-  Engine* engine = static_cast<Engine*>(glfwGetWindowUserPointer(window));
-  engine->mouse(xpos, ypos);
-}
-
-void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
-{
-  Engine* engine = static_cast<Engine*>(glfwGetWindowUserPointer(window));
-
-  if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
-    glfwSetWindowShouldClose(window, true);
-  }
-
-  if (key == GLFW_KEY_W && action == GLFW_PRESS) {
-    engine->change_slide(-1);
-  }
-
-  if (key == GLFW_KEY_S && action == GLFW_PRESS) {
-    engine->change_slide(1);
-  }
-}
-
-GLFWwindow* create_window() {
-  GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
-  dbc::check(window != NULL, "failed to open window");
-
-  glfwMakeContextCurrent(window);
-
-  glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
-
-  auto good = gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
-  dbc::check(good, "failed to load GLAD");
-
-  glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
-
-  glfwSetCursorPosCallback(window, mouse_callback);
-  glfwSetKeyCallback(window, key_callback);
-
-  return window;
-}
-
-void setup() {
-  glEnable(GL_DEPTH_TEST);
-  glEnable(GL_BLEND);
-  glEnable(GL_CULL_FACE);
-  glEnable(GL_MULTISAMPLE);
-
-  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-
-  glDepthFunc(GL_LESS);
-}
-
-void update(GLFWwindow* window) {
-  glfwPollEvents();
-}
-
-void render(GLFWwindow* window, Engine &state) {
-  state.render();
-
-  glfwSwapBuffers(window);
-}
-
-void quit(GLFWwindow* window) {
-  glfwTerminate();
-}
-
 int main() {
-  init_glfw();
-
-  auto window = create_window();
-  setup();
   Deck deck = Bezos::load("lua/builder_test.lua");
+  Engine state{.deck=deck};
+  state.init();
 
-  Engine state(deck);
-
-  glfwSetWindowUserPointer(window, &state);
-
-  while(!glfwWindowShouldClose(window)) {
-    update(window);
-    render(window, state);
+  while(state.active()) {
+    state.update();
+    state.render();
   }
 
-  quit(window);
+  state.quit();
 
   return 0;
 }

src/render.cpp

@@ -6,17 +6,97 @@
 #include <glm/gtc/matrix_transform.hpp>
 #include <glm/gtc/type_ptr.hpp>
 #include "image.hpp"
+#include <glad/glad.h>
 
-Engine::Engine(Deck &deck) :
-  deck(deck)
+void framebuffer_size_callback(GLFWwindow *, int width, int height) {
+  glViewport(0, 0, width, height);
+}
+
+void mouse_callback(GLFWwindow *window, double xpos, double ypos) {
+  Engine* engine = static_cast<Engine*>(glfwGetWindowUserPointer(window));
+  engine->mouse(xpos, ypos);
+}
+
+void key_callback(GLFWwindow* window, int key, int scancode, int action, int mods)
 {
-  text.load_font();
-  screen.init();
-  framebuffer.init();
+  Engine* engine = static_cast<Engine*>(glfwGetWindowUserPointer(window));
+
+  if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
+    glfwSetWindowShouldClose(window, true);
+  }
+
+  if (key == GLFW_KEY_W && action == GLFW_PRESS) {
+    engine->change_slide(-1);
+  }
+
+  if (key == GLFW_KEY_S && action == GLFW_PRESS) {
+    engine->change_slide(1);
+  }
+}
+
+void init_glfw() {
+  glfwInit();
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
+  glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
+  glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
+
+#ifdef __APPLE__
+  glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
+#endif
+}
+
+
+GLFWwindow* create_window() {
+  GLFWwindow* window = glfwCreateWindow(SCR_WIDTH, SCR_HEIGHT, "LearnOpenGL", NULL, NULL);
+  dbc::check(window != NULL, "failed to open window");
+
+  glfwMakeContextCurrent(window);
+
+  glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);
+
+  auto good = gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
+  dbc::check(good, "failed to load GLAD");
+
+  glfwSetInputMode(window, GLFW_CURSOR, GLFW_CURSOR_DISABLED);
+
+  glfwSetCursorPosCallback(window, mouse_callback);
+  glfwSetKeyCallback(window, key_callback);
+
+  return window;
+}
+
+void setup() {
+  glEnable(GL_DEPTH_TEST);
+  glEnable(GL_BLEND);
+  glEnable(GL_CULL_FACE);
+  glEnable(GL_MULTISAMPLE);
+
+  glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+  glDepthFunc(GL_LESS);
+}
+
+void Engine::init() {
+  init_glfw();
+  window = create_window();
+  setup();
+
+  text = std::make_shared<Text>();
+  screen = std::make_shared<Screen>();
+  framebuffer = std::make_shared<FrameBuffer>();
+
+  text->load_font();
+  // BUG: this will fail if it's before text.load_font
+  deck.analyze();
+
+  screen->init();
+  framebuffer->init();
+
+  glfwSetWindowUserPointer(window, this);
 }
 
 void Engine::render() {
-  framebuffer.begin();
+  framebuffer->begin();
 
   glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
   glClear(GL_COLOR_BUFFER_BIT);
@@ -26,25 +106,22 @@ void Engine::render() {
 
   for(auto& node : slide.content) {
     line++;
-    float y = (text.font_size + 20) * line;
+    float y = (text->font_size + 20) * line;
 
     if(node.type == NodeType::TEXT || node.type == NodeType::H1 || node.type == NodeType::UL) {
-      text.render(node.content, 25.0f, SCR_HEIGHT - y, 1.0f, glm::vec3(1.0f, 1.0f, 1.0f));
-    } else if(node.type == NodeType::IMAGE) {
-      if(node.image == nullptr) {
-        node.image = std::make_shared<Image>();
-        std::string src = std::any_cast<std::string>(node.config.at("src"));
-        node.image->load(src);
-      }
-
+      text->render(node.content, 25.0f, SCR_HEIGHT - y, 1.0f, glm::vec3(1.0f, 1.0f, 1.0f));
+    } else if(node.type == NodeType::IMAGE && node.image != nullptr) {
+      dbc::check(node.image != nullptr, "Node's image not configured.");
       node.image->render();
     } else {
       dbc::sentinel("Unknown NodeType");
     }
   }
 
-  framebuffer.commit();
-  framebuffer.draw(screen);
+  framebuffer->commit();
+  framebuffer->draw(*screen);
+
+  glfwSwapBuffers(window);
 }
 
 void Engine::change_slide(int dir) {
@@ -52,3 +129,15 @@ void Engine::change_slide(int dir) {
 
   at_slide = std::clamp(at_slide + dir, 0, int(deck.slides.size() - 1));
 }
+
+void Engine::update() {
+  glfwPollEvents();
+}
+
+void Engine::quit() {
+  glfwTerminate();
+}
+
+bool Engine::active() {
+  return !glfwWindowShouldClose(window);
+}

src/render.hpp

@@ -3,17 +3,18 @@
 #include "framebuffer.hpp"
 #include "text.hpp"
 #include "document.hpp"
+#include <GLFW/glfw3.h>
+#include <memory>
 
 struct Engine {
   Deck& deck;
-  FrameBuffer framebuffer;
-  Screen screen;
-  Text text{.font_size=100};
+  std::shared_ptr<FrameBuffer> framebuffer = nullptr;
+  std::shared_ptr<Screen> screen = nullptr;
+  std::shared_ptr<Text> text = nullptr;
   int at_slide = 0;
   float mouse_x = 0.0f;
   float mouse_y = 0.0f;
-
-  Engine(Deck& deck);
+  GLFWwindow* window = nullptr;
 
   void render();
   void change_slide(int dir);
@@ -22,4 +23,9 @@ struct Engine {
     mouse_x = x;
     mouse_y = y;
   }
+
+  void update();
+  void quit();
+  void init();
+  bool active();
 };

src/text.hpp

@@ -12,7 +12,7 @@ struct Character {
 };
 
 struct Text {
-  int font_size = 48;
+  int font_size = 108;
   std::string font{"assets/fonts/text.ttf"};
   Shader text_shader{{"shaders/text.vert.glsl", "shaders/text.frag.glsl", ""}};
   unsigned int text_vao = UINT_MAX;