neop/randomwalk
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sdl wrapper which implicitly decays to ptr

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This commit is contained in:
Jakob Hördt 2024-08-03 18:55:58 +02:00
parent a1d51e54e1
commit 3f3d16c9b2
1 changed files with 14 additions and 11 deletions
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25
main.cpp
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@ -7,11 +7,13 @@
#include <print> #include <print>
#include <random> #include <random>
template <auto sdl_destroyfunc> template <typename SDLT, auto deletef>
using sdl_deleter_t = decltype([](auto* ptr) { sdl_destroyfunc(ptr); }); struct sdl_wrapper_t : std::unique_ptr<SDLT, decltype(deletef)> {
explicit sdl_wrapper_t(SDLT* p)
: std::unique_ptr<SDLT, decltype(deletef)>{p, deletef} {}
template <class SDLT, auto sdl_destroyfunc> operator SDLT*() { return std::unique_ptr<SDLT, decltype(deletef)>::get(); }
using sdl_wrapper_t = std::unique_ptr<SDLT, sdl_deleter_t<sdl_destroyfunc>>; };
using window_t = sdl_wrapper_t<SDL_Window, SDL_DestroyWindow>; using window_t = sdl_wrapper_t<SDL_Window, SDL_DestroyWindow>;
using surface_t = sdl_wrapper_t<SDL_Surface, SDL_FreeSurface>; using surface_t = sdl_wrapper_t<SDL_Surface, SDL_FreeSurface>;
@ -42,11 +44,11 @@ int main() {
)}; )};
renderer_t renderer{ renderer_t renderer{
SDL_CreateRenderer(window.get(), -1, SDL_RENDERER_ACCELERATED) SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED)
}; };
SDL_SetRenderDrawColor(renderer.get(), 0, 0, 0, 0); SDL_SetRenderDrawColor(renderer, 0, 0, 0, 0);
SDL_RenderClear(renderer.get()); SDL_RenderClear(renderer);
SDL_SetRenderDrawColor(renderer.get(), 255, 0, 0, 255); SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
if (!window) { if (!window) {
std::println( std::println(
@ -55,7 +57,7 @@ int main() {
return EXIT_FAILURE; return EXIT_FAILURE;
} }
auto surface = surface_t{SDL_GetWindowSurface(window.get())}; auto surface = surface_t{SDL_GetWindowSurface(window)};
auto point = Point{.x = width / 2, .y = height / 2}; auto point = Point{.x = width / 2, .y = height / 2};
const Point directions[] = { const Point directions[] = {
@ -71,7 +73,7 @@ int main() {
bool quit = false; bool quit = false;
auto next_frame = std::chrono::steady_clock::now(); auto next_frame = std::chrono::steady_clock::now();
while (!quit) { while (!quit) {
SDL_RenderDrawPoint(renderer.get(), point.x, point.y); SDL_RenderDrawPoint(renderer, point.x, point.y);
Point newpoint; Point newpoint;
do { do {
newpoint = point + directions[dist(rne)]; newpoint = point + directions[dist(rne)];
@ -86,7 +88,8 @@ int main() {
while (SDL_PollEvent(&e)) { while (SDL_PollEvent(&e)) {
if (e.type == SDL_QUIT) { quit = true; } if (e.type == SDL_QUIT) { quit = true; }
} }
SDL_RenderPresent(renderer.get()); SDL_RenderPresent(renderer);
// SDL_RenderClear(renderer);
} }
} }
} }