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#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_rect.h>
#include <SDL2/SDL_render.h>
#include <SDL2/SDL_surface.h>
#include <SDL2/SDL_video.h>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <iostream>
#include <memory>
#include <string>
#include <sys/types.h>
#include <utility>
#include "../api/Sprite.h"
#include "../api/Texture.h"
#include "../api/Transform.h"
#include "../util/log.h"
#include "Exception.h"
#include "SDLContext.h"
using namespace crepe;
SDLContext & SDLContext::get_instance() {
static SDLContext instance;
return instance;
}
SDLContext::SDLContext() {
dbg_trace();
// FIXME: read window defaults from config manager
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
// FIXME: throw exception
std::cerr << "SDL could not initialize! SDL_Error: " << SDL_GetError()
<< std::endl;
return;
}
SDL_Window * tmp_window = SDL_CreateWindow(
"Crepe Game Engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
this->viewport.w, this->viewport.h, 0);
if (!tmp_window) {
// FIXME: throw exception
std::cerr << "Window could not be created! SDL_Error: "
<< SDL_GetError() << std::endl;
return;
}
this->game_window
= {tmp_window, [](SDL_Window * window) { SDL_DestroyWindow(window); }};
SDL_Renderer * tmp_renderer = SDL_CreateRenderer(
this->game_window.get(), -1, SDL_RENDERER_ACCELERATED);
if (!tmp_renderer) {
// FIXME: throw exception
std::cerr << "Renderer could not be created! SDL_Error: "
<< SDL_GetError() << std::endl;
SDL_DestroyWindow(this->game_window.get());
return;
}
this->game_renderer = {tmp_renderer, [](SDL_Renderer * renderer) {
SDL_DestroyRenderer(renderer);
}};
int img_flags = IMG_INIT_PNG;
if (!(IMG_Init(img_flags) & img_flags)) {
// FIXME: throw exception
std::cout << "SDL_image could not initialize! SDL_image Error: "
<< IMG_GetError() << std::endl;
}
}
SDLContext::~SDLContext() {
dbg_trace();
this->game_renderer.reset();
this->game_window.reset();
// TODO: how are we going to ensure that these are called from the same
// thread that SDL_Init() was called on? This has caused problems for me
// before.
IMG_Quit();
SDL_Quit();
}
void SDLContext::handle_events(bool & running) {
//TODO: wouter i need events
/*
SDL_Event event;
SDL_PollEvent(&event);
switch (event.type) {
case SDL_QUIT:
running = false;
break;
case SDL_KEYDOWN:
triggerEvent(KeyPressedEvent(getCustomKey(event.key.keysym.sym)));
break;
case SDL_MOUSEBUTTONDOWN:
int x, y;
SDL_GetMouseState(&x, &y);
triggerEvent(MousePressedEvent(x, y));
break;
}
*/
}
void SDLContext::clear_screen() { SDL_RenderClear(this->game_renderer.get()); }
void SDLContext::present_screen() {
SDL_RenderPresent(this->game_renderer.get());
}
void SDLContext::set_rbg_texture(const std::shared_ptr<Texture>& texture, const uint8_t& r, const uint8_t& g, const uint8_t& b){
SDL_SetTextureColorMod(texture->texture.get(), r, g, b);
}
void SDLContext::set_alpha_texture(const std::shared_ptr<Texture>& texture, const uint8_t& alpha){
SDL_SetTextureAlphaMod(texture->texture.get(), alpha );
}
void SDLContext::draw(const Sprite & sprite, const Transform & transform,
const Camera & cam) {
SDL_RendererFlip render_flip
= (SDL_RendererFlip) ((SDL_FLIP_HORIZONTAL * sprite.flip.flip_x)
| (SDL_FLIP_VERTICAL * sprite.flip.flip_y));
sprite.sprite_image->texture.get();
this->set_rbg_texture(sprite.sprite_image, sprite.color.r, sprite.color.g, sprite.color.b);
this->set_alpha_texture(sprite.sprite_image, sprite.color.a);
double adjusted_x = (transform.position.x - cam.x) * cam.zoom;
double adjusted_y = (transform.position.y - cam.y) * cam.zoom;
double adjusted_w = sprite.sprite_rect.w * transform.scale * cam.zoom;
double adjusted_h = sprite.sprite_rect.h * transform.scale * cam.zoom;
SDL_Rect srcrect = {
.x = sprite.sprite_rect.x,
.y = sprite.sprite_rect.y,
.w = sprite.sprite_rect.w,
.h = sprite.sprite_rect.h,
};
SDL_Rect dstrect = {
.x = static_cast<int>(adjusted_x),
.y = static_cast<int>(adjusted_y),
.w = static_cast<int>(adjusted_w),
.h = static_cast<int>(adjusted_h),
};
SDL_RenderCopyEx(this->game_renderer.get(),
sprite.sprite_image->texture.get(), &srcrect,
&dstrect, transform.rotation, NULL, render_flip);
}
void SDLContext::camera(const Camera & cam) {
this->viewport.w = static_cast<int>(cam.aspect_width);
this->viewport.h = static_cast<int>(cam.aspect_height);
this->viewport.x = static_cast<int>(cam.x) - (SCREEN_WIDTH / 2);
this->viewport.y = static_cast<int>(cam.y) - (SCREEN_HEIGHT / 2);
SDL_SetRenderDrawColor(this->game_renderer.get(), cam.bg_color.r,
cam.bg_color.g, cam.bg_color.b, cam.bg_color.a);
}
uint64_t SDLContext::get_ticks() const { return SDL_GetTicks64(); }
std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
SDLContext::texture_from_path(const std::string & path) {
SDL_Surface * tmp = IMG_Load(path.c_str());
if (tmp == nullptr) {
tmp = IMG_Load("../asset/texture/ERROR.png");
}
std::unique_ptr<SDL_Surface, std::function<void(SDL_Surface *)>>
img_surface;
img_surface
= {tmp, [](SDL_Surface * surface) { SDL_FreeSurface(surface); }};
SDL_Texture * tmp_texture = SDL_CreateTextureFromSurface(
this->game_renderer.get(), img_surface.get());
if (tmp_texture == nullptr) {
throw Exception("Texture cannot be load from %s", path.c_str());
}
std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>>
img_texture;
img_texture = {tmp_texture,
[](SDL_Texture * texture) { SDL_DestroyTexture(texture); }};
return img_texture;
}
int SDLContext::get_width(const Texture & ctx) {
int w;
SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &w, NULL);
return w;
}
int SDLContext::get_height(const Texture & ctx) {
int h;
SDL_QueryTexture(ctx.texture.get(), NULL, NULL, NULL, &h);
return h;
}
void SDLContext::delay(int ms) const { SDL_Delay(ms); }
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