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Update CMake config, add events demo

Make CMake load dependencies relative to project directory.
feature/data-structs
TheoryOfNekomata 2 years ago
commit
d5bdd3c101
4 changed files with 225 additions and 0 deletions
  1. +62
    -0
      .gitignore
  2. +27
    -0
      CMakeLists.txt
  3. +17
    -0
      README.md
  4. +119
    -0
      src/packages/game/main.c

+ 62
- 0
.gitignore View File

@@ -0,0 +1,62 @@
*.d
*.o
*.ko
*.obj
*.elf
*.ilk
*.map
*.exp
*.gch
*.pch
*.lib
*.a
*.la
*.lo
*.dll
*.so
*.so.*
*.dylib
*.exe
*.out
*.app
*.i*86
*.x86_64
*.hex
*.dSYM/
*.su
*.idb
*.pdb
*.mod*
*.cmd
.tmp_versions/
modules.order
Module.symvers
Mkfile.old
dkms.conf
CMakeLists.txt.user
CMakeCache.txt
CMakeFiles
CMakeScripts
Testing
Makefile
cmake_install.cmake
install_manifest.txt
compile_commands.json
CTestTestfile.cmake
_deps
Thumbs.db
Thumbs.db:encryptable
ehthumbs.db
ehthumbs_vista.db
*.stackdump
[Dd]esktop.ini
$RECYCLE.BIN/
*.cab
*.msi
*.msix
*.msm
*.msp
*.lnk
.idea/
cmake-build-debug/
dependencies/

+ 27
- 0
CMakeLists.txt View File

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cmake_minimum_required(VERSION 3.20)

# Set your project name here
project(izanagi C)

set(CMAKE_C_STANDARD 11)

include_directories("${PROJECT_SOURCE_DIR}/dependencies/SDL2/include")

if (WIN32)
if (CMAKE_SIZEOF_VOID_P EQUAL 8)
set(PROJECT_ARCH x64)
else ()
set(PROJECT_ARCH x86)
endif ()
endif ()

link_directories("${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}")
add_executable(izanagi src/packages/game/main.c)
target_link_libraries(izanagi SDL2main SDL2)

if (WIN32)
add_custom_command(TARGET izanagi POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different # which executes "cmake - E copy_if_different..."
"${PROJECT_SOURCE_DIR}/dependencies/SDL2/lib/${PROJECT_ARCH}/SDL2.dll" # <--this is in-file
$<TARGET_FILE_DIR:izanagi>) # <--this is out-file path
endif ()

+ 17
- 0
README.md View File

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# sdl2-hello-world
A beginner template for SDL2 powered by CMake.
## Setup
1. Clone this repo.
2. Download the **SDL2 Development Libraries** from the [official download page](https://www.libsdl.org/download-2.0.php).
- For Windows
1. Unpack the **MSVC** archive under `dependencies` folder in this project's root.
2. Rename the directory as `SDL2`.
- For macOS
`TODO`
_Alternatively, on Windows, you can link the external libraries via symlink._
3. Build via CMake.

+ 119
- 0
src/packages/game/main.c View File

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#include <SDL.h>
#include <stdbool.h>
#include <stdio.h>

const char* APP_NAME = "SDL2";
const unsigned int SCREEN_WIDTH = 640;
const unsigned int SCREEN_HEIGHT = 480;

const unsigned char CONTROLS = 16;

const SDL_KeyCode KEYBOARD_CONTROLS[CONTROLS] = {
SDLK_RIGHT,
SDLK_DOWN,
SDLK_LEFT,
SDLK_UP,
SDLK_RETURN, // yes
SDLK_BACKSPACE, // no
SDLK_a, // action0
SDLK_s, // action1
SDLK_d, // action2
SDLK_f, // action3
SDLK_z, // action4
SDLK_x, // action5
SDLK_c, // action6
SDLK_v, // action7
SDLK_w, // action8
SDLK_e, // action9
};

int main(int argc, char* args[]) {
SDL_Window* window = NULL;
SDL_Surface* screenSurface = NULL;

if (SDL_Init(
SDL_INIT_VIDEO
| SDL_INIT_GAMECONTROLLER
| SDL_INIT_EVENTS
) < 0) {
printf("SDL could not initialize! SDL_Error: %s\n", SDL_GetError());
return -1;
}

window = SDL_CreateWindow(
APP_NAME,
SDL_WINDOWPOS_UNDEFINED,
SDL_WINDOWPOS_UNDEFINED,
SCREEN_WIDTH,
SCREEN_HEIGHT,
SDL_WINDOW_SHOWN
);

if (window == NULL) {
printf("Window could not be created! SDL_Error: %s\n", SDL_GetError());
return -2;
}

bool quit = false;
SDL_Event e;
screenSurface = SDL_GetWindowSurface(window);

unsigned short action = 0;
while (!quit) {
SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0x00, 0x00, 0x00));
uint64_t ticks = SDL_GetTicks64();
for (unsigned char i = 0; i < 64; i += 1) {
const unsigned char column = (64 - i) % 32;
const unsigned char row = i / 32;
const uint64_t bitflag = (0x1lu << i);
const unsigned char size = 4;
if (ticks & bitflag) {
SDL_FillRect(screenSurface, &(SDL_Rect) {
column * size,
SCREEN_HEIGHT - ((row + 1) * size),
size,
size
}, SDL_MapRGB(screenSurface->format, 0x00, 0xff, 0xff));
}
}

while (SDL_PollEvent(&e) != 0) {
if (e.type == SDL_QUIT) {
quit = true;
}

for (unsigned char i = 0; i < CONTROLS; i += 1) {
// TODO do same for gamepad
if (e.key.keysym.sym == KEYBOARD_CONTROLS[i]) {
const unsigned short bitflag = (0x1 << i);
if (e.type == SDL_KEYDOWN) {
action |= bitflag;
} else if (e.type == SDL_KEYUP) {
action &= ~bitflag;
}
}
}

for (unsigned char i = 0; i < CONTROLS; i += 1) {
const unsigned char column = i % 4;
const unsigned char row = i / 4;
const unsigned short bitflag = (0x1 << i);
const unsigned char size = 4;
if (action & bitflag) {
SDL_FillRect(screenSurface, &(SDL_Rect) {
column * size,
row * size,
size,
size
}, SDL_MapRGB(screenSurface->format, 0xff, 0xff, 0x00));
}
}

SDL_UpdateWindowSurface(window);
}
}
SDL_DestroyWindow(window);
SDL_Quit();

return 0;
}

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