Initial commit

.gitignore

@@ -0,0 +1,4 @@
+.vscode/*
+!.vscode/tasks.json
+!.vscode/launch.json
+build

.vscode/launch.json

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+{
+    "version": "2.0.0",
+    "configurations": [
+        {
+            "name": "(gdb) C Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/linux-86_64/${workspaceFolderBasename}",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${workspaceFolder}",
+            "environment": [],
+            "externalConsole": false,
+            "miDebuggerPath": "/usr/bin/gdb",
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                },
+                {
+                    "description": "Set Disassembly Flavor to Intel",
+                    "text": "-gdb-set disassembly-flavor intel",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "build linux86_64"
+        }
+    ]
+}

.vscode/tasks.json

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+{
+    "tasks": [
+        {
+            "type": "shell",
+            "label": "build linux86_64",
+            "command": "./build.sh",
+            "args": [
+                "linux86_64"
+            ],
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": true
+            },
+            "detail": "builds the program for linux x86_64"
+        },
+        {
+            "type": "shell",
+            "label": "build win86_64",
+            "command": "./build.sh",
+            "args": [
+                "win86_64"
+            ],
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": false
+            },
+            "detail": "builds the program for windows x86_64"
+        },
+        {
+            "type": "shell",
+            "label": "build web",
+            "command": "./build.sh",
+            "args": [
+                "web"
+            ],
+            "options": {
+                "cwd": "${workspaceFolder}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": {
+                "kind": "build",
+                "isDefault": false
+            },
+            "detail": "builds the program for web using emscripten"
+        }
+    ],
+    "version": "2.0.0"
+}

assets/uwu

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+uwu

build.sh

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+#!/bin/bash
+
+# define variables
+PROJECT_NAME=${PWD##*/}
+BUILD_DIR="./build"
+INCLUDE_IN_BUILD="./assets"
+
+# compilation targets
+args_linux86_64()
+{
+    ARCHITECTURE="linux-86_64"
+    COMPILER="/bin/gcc"
+    ARGS="-lSDL2"
+    FILE_EXSTENSION=""
+}
+
+args_win86-64()
+{
+    ARCHITECTURE="win-86_64"
+    COMPILER="/usr/bin/x86_64-w64-mingw32-gcc"
+    ARGS="-lmingw32 -lSDL2main -lSDL2 -mwindows"
+    INCLUDE_IN_BUILD="$INCLUDE_IN_BUILD /usr/x86_64-w64-mingw32/bin/SDL2.dll"
+    FILE_EXSTENSION=".exe"
+}
+
+args_emscripten()
+{
+    ARCHITECTURE="web"
+    COMPILER="emcc"         # just make sure it's in $PATH (it's a pain to install)
+    ARGS="-s USE_SDL=2"
+    FILE_EXSTENSION=".html"
+}
+
+# handle arguments
+if [ "$1" = "linux86_64" ]; then args_linux86_64
+elif [ "$1" = "win86_64" ]; then args_win86-64
+elif [ "$1" = "web" ]; then args_emscripten
+else echo -e "\033[91mdidn't include any arguments! D:\033[0m" && exit 1
+fi
+
+# check whether $BUILD_DIR or $ARCHITECTURE isn't set
+if [[ -z $BUILD_DIR ]] || [[ -z "$ARCHITECTURE" ]]; then
+    echo -e "\033[91mBUILD_DIR or ARCHITECTURE not set D:\033[0m"
+    exit 1
+fi
+
+
+# make (and clear) the build directory
+mkdir -p "$BUILD_DIR/$ARCHITECTURE"
+rm -rf "${BUILD_DIR:?}/$ARCHITECTURE/*"
+
+# copy included files or directories to the build directory
+if [[ -n $INCLUDE_IN_BUILD ]]; then
+    cp -r "$INCLUDE_IN_BUILD" "$BUILD_DIR/$ARCHITECTURE"
+fi
+
+# get the executable path
+EXE_PATH=$BUILD_DIR/$ARCHITECTURE/$PROJECT_NAME$FILE_EXSTENSION
+echo "building at: $EXE_PATH"
+
+# check whether the compiler can actually be executed
+if [ ! -x "$COMPILER" ] && ! command -v "$COMPILER" > /dev/null; then
+    echo -e "\033[91mCouldn't find an executable at path: \033[0m $COMPILER"
+    exit 1
+fi
+
+# compile the code
+COMMAND="$COMPILER $(find ./src -name "*.c") -o $EXE_PATH -Wall -g -lm $ARGS"
+echo "using command: $COMMAND"
+$COMMAND
+exit $?

src/errors.c

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+#include "errors.h"
+
+#include <SDL2/SDL.h>
+#include <stdarg.h>
+#include <stdio.h>
+
+#define MAX_STR_LEN 128
+
+void error(const ErrorCode error_code, const char* format, ...) {
+    char buffer[MAX_STR_LEN] = {0}; // contains the buffer of the final string
+
+    va_list args = {0};
+    va_start(args, format);
+    vsnprintf(buffer, MAX_STR_LEN, format, args);
+    va_end(args);
+
+    printf("\033[91mE\033[0m: %s\n", buffer);
+    SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "something went wrong! :O", buffer, NULL);
+
+    exit(error_code);
+}
+
+void warn(const char* format, ...) {
+    char buffer[MAX_STR_LEN] = {0}; // contains the buffer of the final string
+
+    va_list args = {0};
+    va_start(args, format);
+    vsnprintf(buffer, MAX_STR_LEN, format, args);
+    va_end(args);
+
+    printf("\033[93mW\033[0m: %s\n", buffer);
+}

src/errors.h

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+#pragma once
+
+typedef unsigned char ErrorCode;
+enum {
+    ERROR_MISC = -1,
+
+    SUCCESS = 0,
+    ERROR_INIT = 1,
+
+    // SDL errors
+    ERROR_SDL = 2,
+    ERROR_SDL_INIT = ERROR_SDL | ERROR_INIT,
+
+    // renderer errors
+    ERROR_SDL_RENDERER = ERROR_SDL | 4,
+    ERROR_SDL_RENDERER_INIT = ERROR_SDL_RENDERER | ERROR_INIT,
+
+    // audio errors
+    ERROR_SDL_AUDIO = ERROR_SDL | 8,
+    ERROR_SDL_AUDIO_INIT = ERROR_SDL_AUDIO | ERROR_INIT,
+};
+
+// call when a fatal error has occurred, the program will immediately terminate when called
+void error(const ErrorCode error_code, const char* format, ...);
+void warn(const char* format, ...);

src/game/game.c

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+#include "game.h"
+
+#include "../main.h"
+
+
+// called every time the game's state is updated
+void game_update(GameData game_data, const Uint8* keys) {
+    if (keys[SDL_SCANCODE_ESCAPE]) {
+        stop();
+    }
+}

src/game/game.h

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+#pragma once
+#include <SDL2/SDL.h>
+
+// stores the data used in the game
+typedef struct {
+} GameData;
+
+// updates the game's state
+void game_update(GameData game_data, const Uint8* keys);

src/main.c

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+#include "main.h"
+
+#include <SDL2/SDL.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "errors.h"
+#include "game/game.h"
+#include "window/audio.h"
+#include "window/renderer.h"
+
+#ifdef __EMSCRIPTEN__ // for web builds
+#include <emscripten.h>
+#endif
+
+
+bool playing = true;
+
+SDL_Window* window = NULL;
+SDL_Renderer* renderer = NULL;
+
+// handles game application initialisation
+static void init(void) {
+    // initialize SDL
+    if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0) {
+        error(ERROR_SDL_INIT, "SDL could not initialize! SDL Error: %s", SDL_GetError());
+        return;
+    }
+
+    // initialize the renderer
+    if (renderer_init(&window, &renderer) < 0) {
+        error(ERROR_SDL_RENDERER_INIT, SDL_GetError());
+        return;
+    }
+
+    // initialize audio
+    AudioDevice* audio_device = audio_device_init(32000, AUDIO_S16, 1, 4096);
+    //AudioData audio1 = audio_load_wav(audio_device, "FILE MANE");
+}
+
+// handles game application updating
+static void update(void) {
+    // update the input
+    {
+        SDL_Event e;
+        while (SDL_PollEvent(&e)) {
+            switch (e.type) {
+            case SDL_QUIT:
+                exit(SUCCESS);
+                break;
+            }
+        }
+    }
+
+    // preform updates
+    game_update((GameData){}, SDL_GetKeyboardState(NULL));
+    renderer_update(&(RenderData){
+        window, renderer});
+}
+
+// handles game application quitting
+void stop(void) {
+    playing = false;
+}
+
+// entry point of the application
+int main(int argc, char** argv) {
+    init();
+
+    while (playing)
+        update();
+
+    // cleanup of resources
+    SDL_Quit();
+
+    return 0;
+}

src/main.h

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+#pragma once
+
+// stops execution of the game
+void stop(void);

src/window/audio.c

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+#include "audio.h"
+
+#include <SDL2/SDL.h>
+
+#include "../errors.h"
+
+// the maximum amount of sounds that can play at once
+#define MAX_SOUNDS 64
+
+typedef struct {
+    AudioData* playing_audio;
+    AudioDevice audio_device;
+} AudioCallbackData;
+
+// audio callback from SDL_AudioSpec; called when the audio device needs more data
+static void audio_mixer(void* userdata, Uint8* stream, int len) {
+    memset(stream, 0, len);         // clear the playing audio
+    AudioDevice* device = userdata; // get the callback data
+    AudioData* audio = device->playing_audio;
+
+    for (int i = 0; i < MAX_SOUNDS; i++) {
+        // skip if the audio doesn't conain any further data
+        if (audio[i].length <= 0) {
+            continue;
+        }
+
+        // get the length of which we shall be mixing
+        Uint32 mix_length = SDL_min(audio[i].length, len);
+
+        // mix the audio with the stream
+        SDL_MixAudioFormat(stream, audio[i].buffer, device->format, mix_length, SDL_MIX_MAXVOLUME);
+        audio[i].buffer += mix_length; // move the pointer up a a bit
+        audio[i].length -= mix_length; // move up the mixed amount
+    }
+}
+
+// converts the audio to the format of the audio device
+static void convert_audio(const AudioDevice* audio_device, const SDL_AudioSpec wav_spec, Uint8** wav_buffer, Uint32* wav_length) {
+    // build the audio converter with the audio given
+    SDL_AudioCVT cvt = {0};
+    SDL_BuildAudioCVT(&cvt, wav_spec.format, wav_spec.channels, wav_spec.freq, audio_device->format, audio_device->channels, audio_device->freq);
+
+    cvt.len = (*wav_length) * wav_spec.channels;          // the buffer length
+    cvt.buf = (Uint8*)SDL_malloc(cvt.len * cvt.len_mult); // allocate size for the new buffer
+    memcpy(cvt.buf, *wav_buffer, *wav_length);            // copy wav data to cvt buffer;
+
+    // convert
+    SDL_ConvertAudio(&cvt);
+
+    // output
+    *wav_length = cvt.len_cvt;                 // set the length to the new length
+    memcpy(*wav_buffer, cvt.buf, cvt.len_cvt); // copy converted cvt buffer back to wav buffer
+
+    free(cvt.buf); // free the memory allocated to the cvt buffer
+}
+
+// loads a WAV file and returns the relevant information
+AudioData audio_load_wav(const AudioDevice* audio_device, const char* file_path) {
+    SDL_AudioSpec wav_spec = {0};
+    AudioData audio = {0};
+
+    SDL_LoadWAV(file_path, &wav_spec, &audio.buffer, &audio.length);
+    convert_audio(audio_device, wav_spec, &audio.buffer, &audio.length);
+    audio.mixed_amount = audio.length;
+
+    return audio;
+}
+
+// initializes the audio device
+AudioDevice* audio_device_init(const int freq, const SDL_AudioFormat format, const Uint8 channels, const Uint16 samples) {
+    // allocate memory for the audio device
+    AudioDevice* audio_device = malloc(sizeof(AudioDevice));
+
+    // define the audio specification
+    SDL_AudioSpec spec = {freq, format, channels, samples};
+    spec.callback = audio_mixer;
+    spec.userdata = audio_device;
+
+    // create the audio device
+    *audio_device = (AudioDevice){
+        SDL_OpenAudioDevice(NULL, 0, &spec, NULL, 0),
+        freq,
+        format,
+        channels,
+        calloc(MAX_SOUNDS, sizeof(AudioData)), // allocate memory on the heap for the playing audio array
+    };
+
+    // if the audio device isn't set, cause an error
+    if (audio_device->id < 1) {
+        error(ERROR_SDL_AUDIO_INIT, "AudioDivice failed to open! SDL Error: %s", SDL_GetError());
+        return NULL;
+    }
+
+    // default state of the device is paused, so we unpause it here
+    SDL_PauseAudioDevice(audio_device->id, 0);
+    return audio_device;
+}
+
+// plays the audio
+void audio_play(const AudioDevice* audio_device, const AudioData audio) {
+    AudioData* playing_audio = audio_device->playing_audio;
+
+    for (int i = 0; i < MAX_SOUNDS; i++) {
+        // overrite audio that has been deallocated
+        if (playing_audio[i].length <= 0) {
+
+            // override the audio
+            playing_audio[i] = audio;
+            break; // don't continue. :3
+        }
+    }
+}

src/window/audio.h

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+#pragma once
+#include <SDL2/SDL.h>
+
+typedef struct {
+    Uint32 length;
+    Uint32 mixed_amount;
+    Uint8* buffer;
+} AudioData;
+
+typedef struct {
+    SDL_AudioDeviceID id;
+    int freq;
+    SDL_AudioFormat format;
+    Uint8 channels;
+    AudioData* playing_audio;
+} AudioDevice;
+
+
+AudioData audio_load_wav(const AudioDevice* audio_device, const char* file_path);
+AudioDevice* audio_device_init(const int freq, const SDL_AudioFormat format, const Uint8 channels, const Uint16 samples);
+void audio_play(const AudioDevice* audio_device, const AudioData audio);

src/window/renderer.c

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+// initializes the window and renderer
+#include "renderer.h"
+
+#include <SDL2/SDL.h>
+#include <stdio.h>
+
+#include "../errors.h"
+#include "../main.h"
+
+
+int renderer_init(SDL_Window** window, SDL_Renderer** renderer) {
+    // create a new window
+    *window = SDL_CreateWindow("", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 100, 100, SDL_WINDOW_SHOWN);
+    if (*window == NULL) {
+        error(ERROR_SDL_RENDERER_INIT, "Window failed to be created! SDL Error: %s", SDL_GetError());
+        return -1;
+    }
+
+    // create a renderer
+    *renderer = SDL_CreateRenderer(*window, -1, SDL_RENDERER_PRESENTVSYNC);
+    if (*renderer == NULL) {
+        error(ERROR_SDL_RENDERER_INIT, "Renderer failed to be created! SDL Error: %s", SDL_GetError());
+        return -1;
+    }
+
+    return 0;
+}
+
+void renderer_update(const RenderData* render_data) {
+    SDL_Renderer* renderer = render_data->renderer;
+
+    int success = 0; // if an error occurs, this value is <0
+
+    // clear render
+    success |= SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0x50);
+    success |= SDL_RenderClear(renderer);
+
+    if (success < 0) {
+        warn("\033[93mW\033[0m: something went wrong whilst renderering! SDL Error: %s\n", SDL_GetError());
+        return;
+    }
+
+    SDL_RenderPresent(renderer);
+}

src/window/renderer.h

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+#pragma once
+#include <SDL2/SDL.h>
+
+typedef struct {
+    SDL_Window* window;
+    SDL_Renderer* renderer;
+} RenderData;
+
+int renderer_init(SDL_Window** window, SDL_Renderer** renderer);
+void renderer_update(const RenderData* render_data);