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-rw-r--r--src/components/Text.hpp71
-rw-r--r--src/engine.cpp11
-rw-r--r--src/script.cpp13
-rw-r--r--src/script.hpp6
-rw-r--r--src/text.cpp124
-rw-r--r--src/text.hpp94
6 files changed, 311 insertions, 8 deletions
diff --git a/src/components/Text.hpp b/src/components/Text.hpp
new file mode 100644
index 0000000..9566499
--- /dev/null
+++ b/src/components/Text.hpp
@@ -0,0 +1,71 @@
+/**
+ * @file Text.hpp
+ * Allows text to be shown with an entity.
+ *
+ * Copyright (C) 2019 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef COMPONENT_TEXT_HPP_
+#define COMPONENT_TEXT_HPP_
+
+#include "Component.hpp"
+
+struct Text : Component<Text>
+{
+public:
+ std::string font;
+ std::string text;
+ double offsetX, offsetY;
+
+ Text(const std::string& _font, const std::string& _text) :
+ font(_font), text(_text), offsetX(0), offsetY(0) {}
+ Text(const std::string& _font, const std::string& _text,
+ double _x, double _y) :
+ font(_font), text(_text), x(_x), y(_y) {}
+
+ Text FromLua(sol::object ref)
+ {
+ if (ref.get_type() == sol::type::table) {
+ sol::table tab = ref;
+ if (tab["font"] != nullptr)
+ this->font = tab["font"];
+ if (tab["text"] != nullptr)
+ this->text = tab["text"];
+ if (tab["x"] != nullptr)
+ this->x = tab["x"];
+ if (tab["y"] != nullptr)
+ this->y = tab["y"];
+ } else {
+ throw std::string("Text table not formatted properly");
+ }
+ return *this;
+ }
+
+ void serialize(cereal::JSONOutputArchive& ar) final {
+ ar(CEREAL_NVP(font), CEREAL_NVP(text), CEREAL_NVP(x), CEREAL_NVP(y));
+ }
+
+ void serialize(cereal::JSONInputArchive& ar) final {
+ ar(CEREAL_NVP(font), CEREAL_NVP(text), CEREAL_NVP(x), CEREAL_NVP(y));
+ }
+
+ std::string serializeName(void) const final {
+ return "Text";
+ }
+};
+
+#endif // COMPONENT_TEXT_HPP_
+
diff --git a/src/engine.cpp b/src/engine.cpp
index a2d0e9b..70b0b45 100644
--- a/src/engine.cpp
+++ b/src/engine.cpp
@@ -27,6 +27,7 @@
#include "script.hpp"
#include "render.hpp"
#include "physics.hpp"
+#include "text.hpp"
#include "components/EventListener.hpp"
#include "components/Script.hpp"
@@ -48,10 +49,18 @@ int Engine::init(void)
systems.add<RenderSystem>();
systems.add<ScriptSystem>(entities, *(systems.system<WorldSystem>().get()));
systems.add<PhysicsSystem>();
+ systems.add<TextSystem>();
systems.configure();
// Load game script and entity data
- systems.system<ScriptSystem>()->init();
+ auto* script = systems.system<ScriptSystem>().get();
+ script->addToGameNamespace("loadFont",
+ [this](std::string name, std::string file, int size) {
+ systems.system<TextSystem>().get()->loadFont(name, file, size);
+ });
+ script->init();
+
+
if (GameState::load("save.json", entities)) {
std::cout << "Loaded from save.json. Delete the file if you don't want "
"it." << std::endl;
diff --git a/src/script.cpp b/src/script.cpp
index cf5b2dd..ec8f5c7 100644
--- a/src/script.cpp
+++ b/src/script.cpp
@@ -31,6 +31,9 @@ void ScriptSystem::configure([[maybe_unused]] entityx::EntityManager& entities,
// Init after systems.configure() in engine.cpp
//init();
+ lua.open_libraries(sol::lib::base, sol::lib::math, sol::lib::string);
+
+ scriptExport();
}
#include <components/Script.hpp>
@@ -54,9 +57,6 @@ void ScriptSystem::receive([[maybe_unused]] const EntitySpawnEvent &toSpawn)
int ScriptSystem::init(void)
{
- lua.open_libraries(sol::lib::base, sol::lib::math, sol::lib::string);
-
- scriptExport();
doFile();
return 0;
@@ -136,10 +136,9 @@ void ScriptSystem::scriptExport(void)
"setSize", &World::setSize,
"getSize", &World::getSize);
-
- auto gamespace = lua["game"].get_or_create<sol::table>();
- gamespace.set_function("spawn", entitySpawn);
- gamespace.set_function("worldRegister", worldRegister);
+ game = lua["game"].get_or_create<sol::table>();
+ game.set_function("spawn", entitySpawn);
+ game.set_function("worldRegister", worldRegister);
}
sol::table ScriptSystem::spawn(sol::object param)
diff --git a/src/script.hpp b/src/script.hpp
index 87027d5..0ac9e63 100644
--- a/src/script.hpp
+++ b/src/script.hpp
@@ -47,6 +47,7 @@ private:
* interactions between C and Lua
*/
sol::state lua;
+ sol::table game;
entityx::EntityManager& manager;
@@ -102,6 +103,11 @@ public:
* Contains all calls that export components/functions to lua.
*/
void scriptExport(void);
+
+ template<typename F>
+ void addToGameNamespace(const std::string& name, F func) {
+ game.set_function(name, func);
+ }
};
#endif // SYSTEM_SCRIPT_HPP_
diff --git a/src/text.cpp b/src/text.cpp
new file mode 100644
index 0000000..8726b88
--- /dev/null
+++ b/src/text.cpp
@@ -0,0 +1,124 @@
+#include "text.hpp"
+
+#include <iostream>
+
+void TextSystem::configure([[maybe_unused]] entityx::EntityManager& entities,
+ [[maybe_unused]] entityx::EventManager& events)
+{
+ if (FT_Init_FreeType(&freetype) != 0) {
+ // TODO handle error
+ }
+}
+
+/**
+ * Draws the text for all entities.
+ */
+void TextSystem::update([[maybe_unused]] entityx::EntityManager& entites,
+ [[maybe_unused]] entityx::EventManager& events,
+ [[maybe_unused]] entityx::TimeDelta dt)
+{
+ // TODO render each Text component's text
+}
+
+void TextSystem::loadFont(const std::string& name,
+ const std::string& file,
+ int size)
+{
+ // Find or load font at given size
+ //
+
+ if (fonts.find(file) == fonts.end()) {
+ FT_Face face;
+ if (FT_New_Face(freetype, file.c_str(), 0, &face)) {
+ // TODO handle this error
+ }
+ fonts.emplace(file, face);
+ }
+
+ auto& face = fonts[file];
+ FT_Set_Pixel_Sizes(face, 0, size);
+ fontData.try_emplace(name);
+
+ // Calculate dimensions of final texture
+ //
+
+ float width = 0, height = 0;
+ for (int c = 32; c < 128; c++) {
+ FT_Load_Char(face, c, FT_LOAD_RENDER);
+ width += face->glyph->bitmap.width + 1;
+ height = std::max(height, static_cast<float>(face->glyph->bitmap.rows));
+ }
+
+ // Generate texture to hold entire font
+ //
+
+ auto& font = fontData[name];
+ glGenTextures(1, &font.tex);
+ glGenBuffers(1, &font.vbo);
+ glBindTexture(GL_TEXTURE_2D, font.tex);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, width, height,
+ 0, GL_RED, GL_UNSIGNED_BYTE, 0);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+
+ // // convert red-on-black to RGBA
+ // auto& g = face->glyph;
+ // std::vector<uint32_t> buf (g->bitmap.width * g->bitmap.rows, 0xFFFFFF);
+ // for (auto j = buf.size(); j--;)
+ // buf[j] |= g->bitmap.buffer[j] << 24;
+
+ // Load each character and add it to the texture
+ //
+
+ float offsetX = 0, offsetY = 0;
+ for (int c = 32; c < 128; c++) {
+ FT_Load_Char(face, c, FT_LOAD_RENDER);
+
+ auto* g = face->glyph;
+ glTexSubImage2D(GL_TEXTURE_2D, 0, offsetX, offsetY,
+ g->bitmap.width, g->bitmap.rows,
+ GL_RED, GL_UNSIGNED_BYTE,
+ g->bitmap.buffer);
+
+ auto& d = font.data[c - 32];
+ d.dim = { g->bitmap.width, g->bitmap.rows };
+ d.bitmap = { g->bitmap_left, g->bitmap_top };
+ d.advance = { g->advance.x >> 6, g->advance.y >> 6 };
+
+ d.offset = { offsetX / width, offsetY / height };
+ offsetX += g->bitmap.width;
+ // Keep offsetY at zero?
+ }
+
+ std::cout << "Loaded font: " << file << " (size: " << size << ", tex: "
+ << font.tex << ")" << std::endl;
+}
+
+void TextSystem::updateVBOs(void)
+{
+ for (auto& data : fontData) {
+ auto& d = data.second;
+ d.buffer.clear();
+ for (auto& text : d.text) {
+ for (char c : text.text) {
+ if (c < 32)
+ continue;
+
+ d.buffer += {
+ text.x, text.y, text.z,
+ d.data[c].offset.first, d.data[c].offset.second,
+ 1.0f
+ };
+ }
+ }
+
+ glBindBuffer(GL_ARRAY_BUFFER, d.vbo);
+ glBufferData(GL_ARRAY_BUFFER,
+ d.text.size() * sizeof(TextMeshData), d.text.data(),
+ GL_STREAM_DRAW);
+ }
+}
+
diff --git a/src/text.hpp b/src/text.hpp
new file mode 100644
index 0000000..f456500
--- /dev/null
+++ b/src/text.hpp
@@ -0,0 +1,94 @@
+/**
+ * @file text.hpp
+ * Manages entity text.
+ *
+ * Copyright (C) 2019 Clyne Sullivan
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SYSTEM_TEXT_HPP_
+#define SYSTEM_TEXT_HPP_
+
+#include <entityx/entityx.h>
+#include <ft2build.h>
+#include <freetype/freetype.h>
+#include <GL/glew.h>
+#include <SDL2/SDL_opengl.h>
+
+#include <map>
+#include <string>
+#include <tuple>
+#include <vector>
+
+struct TextMeshData
+{
+ float posX, posY, posZ;
+ float texX, texY;
+ float transparency;
+} __attribute__ ((packed));
+
+struct FT_Info {
+ std::pair<float, float> offset;
+ std::pair<float, float> dim;
+ std::pair<float, float> bitmap;
+ std::pair<float, float> advance;
+};
+
+struct Text {
+ std::string text;
+ float x;
+ float y;
+ float z;
+};
+
+// Stores texture and placement data for a font at a size.
+struct Font {
+ GLuint tex;
+ GLuint vbo;
+
+ std::array<FT_Info, 96> data;
+ // Stores currently shown text at given index into VBO?
+ std::vector<Text> text;
+ std::basic_string<TextMeshData> buffer;
+};
+
+class TextSystem : public entityx::System<TextSystem>
+{
+public:
+ /**
+ * Prepares the system for running.
+ */
+ void configure(entityx::EntityManager& entities,
+ entityx::EventManager& events) final;
+
+ /**
+ * Draws the text for all entities.
+ */
+ void update(entityx::EntityManager& entites,
+ entityx::EventManager& events,
+ entityx::TimeDelta dt) final;
+
+ void loadFont(const std::string& name, const std::string& file, int size);
+
+private:
+ FT_Library freetype;
+ std::map<std::string, FT_Face> fonts;
+ std::map<std::string, Font> fontData;
+
+ void updateVBOs(void);
+};
+
+#endif // SYSTEM_TEXT_HPP_
+
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