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#include <SDL2/SDL.h>
#include <SDL2/SDL_blendmode.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_keycode.h>
#include <SDL2/SDL_rect.h>
#include <SDL2/SDL_render.h>
#include <SDL2/SDL_surface.h>
#include <SDL2/SDL_video.h>
#include <array>
#include <cmath>
#include <cstddef>
#include <cstdint>
#include <functional>
#include <iostream>
#include <memory>
#include <stdexcept>
#include "../api/Camera.h"
#include "../api/Sprite.h"
#include "../api/Texture.h"
#include "../util/Log.h"
#include "SDLContext.h"
#include "api/Color.h"
#include "types.h"
using namespace crepe;
using namespace std;
SDLContext & SDLContext::get_instance() {
static SDLContext instance;
return instance;
}
SDLContext::SDLContext() {
dbg_trace();
if (SDL_Init(SDL_INIT_VIDEO) != 0) {
throw runtime_error(format("SDLContext: SDL_Init error: {}", SDL_GetError()));
}
auto & cfg = Config::get_instance().window_settings;
SDL_Window * tmp_window
= SDL_CreateWindow(cfg.window_title.c_str(), SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED, cfg.default_size.x, cfg.default_size.y, 0);
if (!tmp_window) {
throw runtime_error(format("SDLContext: SDL_Window error: {}", SDL_GetError()));
}
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) {
throw runtime_error(
format("SDLContext: SDL_CreateRenderer error: {}", SDL_GetError()));
}
this->game_renderer
= {tmp_renderer, [](SDL_Renderer * renderer) { SDL_DestroyRenderer(renderer); }};
int img_flags = IMG_INIT_PNG;
if (!(IMG_Init(img_flags) & img_flags)) {
throw runtime_error("SDLContext: SDL_image could not initialize!");
}
}
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();
}
Keycode SDLContext::sdl_to_keycode(SDL_Keycode sdl_key) {
static const std::array<Keycode, SDL_NUM_SCANCODES> LOOKUP_TABLE = [] {
std::array<Keycode, SDL_NUM_SCANCODES> table{};
table.fill(Keycode::NONE);
table[SDL_SCANCODE_SPACE] = Keycode::SPACE;
table[SDL_SCANCODE_APOSTROPHE] = Keycode::APOSTROPHE;
table[SDL_SCANCODE_COMMA] = Keycode::COMMA;
table[SDL_SCANCODE_MINUS] = Keycode::MINUS;
table[SDL_SCANCODE_PERIOD] = Keycode::PERIOD;
table[SDL_SCANCODE_SLASH] = Keycode::SLASH;
table[SDL_SCANCODE_0] = Keycode::D0;
table[SDL_SCANCODE_1] = Keycode::D1;
table[SDL_SCANCODE_2] = Keycode::D2;
table[SDL_SCANCODE_3] = Keycode::D3;
table[SDL_SCANCODE_4] = Keycode::D4;
table[SDL_SCANCODE_5] = Keycode::D5;
table[SDL_SCANCODE_6] = Keycode::D6;
table[SDL_SCANCODE_7] = Keycode::D7;
table[SDL_SCANCODE_8] = Keycode::D8;
table[SDL_SCANCODE_9] = Keycode::D9;
table[SDL_SCANCODE_SEMICOLON] = Keycode::SEMICOLON;
table[SDL_SCANCODE_EQUALS] = Keycode::EQUAL;
table[SDL_SCANCODE_A] = Keycode::A;
table[SDL_SCANCODE_B] = Keycode::B;
table[SDL_SCANCODE_C] = Keycode::C;
table[SDL_SCANCODE_D] = Keycode::D;
table[SDL_SCANCODE_E] = Keycode::E;
table[SDL_SCANCODE_F] = Keycode::F;
table[SDL_SCANCODE_G] = Keycode::G;
table[SDL_SCANCODE_H] = Keycode::H;
table[SDL_SCANCODE_I] = Keycode::I;
table[SDL_SCANCODE_J] = Keycode::J;
table[SDL_SCANCODE_K] = Keycode::K;
table[SDL_SCANCODE_L] = Keycode::L;
table[SDL_SCANCODE_M] = Keycode::M;
table[SDL_SCANCODE_N] = Keycode::N;
table[SDL_SCANCODE_O] = Keycode::O;
table[SDL_SCANCODE_P] = Keycode::P;
table[SDL_SCANCODE_Q] = Keycode::Q;
table[SDL_SCANCODE_R] = Keycode::R;
table[SDL_SCANCODE_S] = Keycode::S;
table[SDL_SCANCODE_T] = Keycode::T;
table[SDL_SCANCODE_U] = Keycode::U;
table[SDL_SCANCODE_V] = Keycode::V;
table[SDL_SCANCODE_W] = Keycode::W;
table[SDL_SCANCODE_X] = Keycode::X;
table[SDL_SCANCODE_Y] = Keycode::Y;
table[SDL_SCANCODE_Z] = Keycode::Z;
table[SDL_SCANCODE_LEFTBRACKET] = Keycode::LEFT_BRACKET;
table[SDL_SCANCODE_BACKSLASH] = Keycode::BACKSLASH;
table[SDL_SCANCODE_RIGHTBRACKET] = Keycode::RIGHT_BRACKET;
table[SDL_SCANCODE_GRAVE] = Keycode::GRAVE_ACCENT;
table[SDL_SCANCODE_ESCAPE] = Keycode::ESCAPE;
table[SDL_SCANCODE_RETURN] = Keycode::ENTER;
table[SDL_SCANCODE_TAB] = Keycode::TAB;
table[SDL_SCANCODE_BACKSPACE] = Keycode::BACKSPACE;
table[SDL_SCANCODE_INSERT] = Keycode::INSERT;
table[SDL_SCANCODE_DELETE] = Keycode::DELETE;
table[SDL_SCANCODE_RIGHT] = Keycode::RIGHT;
table[SDL_SCANCODE_LEFT] = Keycode::LEFT;
table[SDL_SCANCODE_DOWN] = Keycode::DOWN;
table[SDL_SCANCODE_UP] = Keycode::UP;
table[SDL_SCANCODE_PAGEUP] = Keycode::PAGE_UP;
table[SDL_SCANCODE_PAGEDOWN] = Keycode::PAGE_DOWN;
table[SDL_SCANCODE_HOME] = Keycode::HOME;
table[SDL_SCANCODE_END] = Keycode::END;
table[SDL_SCANCODE_CAPSLOCK] = Keycode::CAPS_LOCK;
table[SDL_SCANCODE_SCROLLLOCK] = Keycode::SCROLL_LOCK;
table[SDL_SCANCODE_NUMLOCKCLEAR] = Keycode::NUM_LOCK;
table[SDL_SCANCODE_PRINTSCREEN] = Keycode::PRINT_SCREEN;
table[SDL_SCANCODE_PAUSE] = Keycode::PAUSE;
table[SDL_SCANCODE_F1] = Keycode::F1;
table[SDL_SCANCODE_F2] = Keycode::F2;
table[SDL_SCANCODE_F3] = Keycode::F3;
table[SDL_SCANCODE_F4] = Keycode::F4;
table[SDL_SCANCODE_F5] = Keycode::F5;
table[SDL_SCANCODE_F6] = Keycode::F6;
table[SDL_SCANCODE_F7] = Keycode::F7;
table[SDL_SCANCODE_F8] = Keycode::F8;
table[SDL_SCANCODE_F9] = Keycode::F9;
table[SDL_SCANCODE_F10] = Keycode::F10;
table[SDL_SCANCODE_F11] = Keycode::F11;
table[SDL_SCANCODE_F12] = Keycode::F12;
table[SDL_SCANCODE_KP_0] = Keycode::KP0;
table[SDL_SCANCODE_KP_1] = Keycode::KP1;
table[SDL_SCANCODE_KP_2] = Keycode::KP2;
table[SDL_SCANCODE_KP_3] = Keycode::KP3;
table[SDL_SCANCODE_KP_4] = Keycode::KP4;
table[SDL_SCANCODE_KP_5] = Keycode::KP5;
table[SDL_SCANCODE_KP_6] = Keycode::KP6;
table[SDL_SCANCODE_KP_7] = Keycode::KP7;
table[SDL_SCANCODE_KP_8] = Keycode::KP8;
table[SDL_SCANCODE_KP_9] = Keycode::KP9;
table[SDL_SCANCODE_LSHIFT] = Keycode::LEFT_SHIFT;
table[SDL_SCANCODE_LCTRL] = Keycode::LEFT_CONTROL;
table[SDL_SCANCODE_LALT] = Keycode::LEFT_ALT;
table[SDL_SCANCODE_LGUI] = Keycode::LEFT_SUPER;
table[SDL_SCANCODE_RSHIFT] = Keycode::RIGHT_SHIFT;
table[SDL_SCANCODE_RCTRL] = Keycode::RIGHT_CONTROL;
table[SDL_SCANCODE_RALT] = Keycode::RIGHT_ALT;
table[SDL_SCANCODE_RGUI] = Keycode::RIGHT_SUPER;
table[SDL_SCANCODE_MENU] = Keycode::MENU;
return table;
}();
if (sdl_key < 0 || sdl_key >= SDL_NUM_SCANCODES) {
return Keycode::NONE;
}
return LOOKUP_TABLE[sdl_key];
}
MouseButton SDLContext::sdl_to_mousebutton(Uint8 sdl_button) {
static const std::array<MouseButton, 5> MOUSE_BUTTON_LOOKUP_TABLE = [] {
std::array<MouseButton, 5> table{};
table.fill(MouseButton::NONE);
table[SDL_BUTTON_LEFT] = MouseButton::LEFT_MOUSE;
table[SDL_BUTTON_RIGHT] = MouseButton::RIGHT_MOUSE;
table[SDL_BUTTON_MIDDLE] = MouseButton::MIDDLE_MOUSE;
table[SDL_BUTTON_X1] = MouseButton::X1_MOUSE;
table[SDL_BUTTON_X2] = MouseButton::X2_MOUSE;
return table;
}();
if (sdl_button >= MOUSE_BUTTON_LOOKUP_TABLE.size()) {
// Return NONE for invalid or unmapped button
return MouseButton::NONE;
}
return MOUSE_BUTTON_LOOKUP_TABLE[sdl_button];
}
void SDLContext::clear_screen() { SDL_RenderClear(this->game_renderer.get()); }
void SDLContext::present_screen() { SDL_RenderPresent(this->game_renderer.get()); }
SDL_Rect SDLContext::get_src_rect(const Sprite & sprite) const {
return SDL_Rect{
.x = sprite.mask.x,
.y = sprite.mask.y,
.w = sprite.mask.w,
.h = sprite.mask.h,
};
}
SDL_Rect SDLContext::get_dst_rect(const Sprite & sprite, const vec2 & pos, const Camera & cam,
const vec2 & cam_pos, const double & img_scale) const {
int width = sprite.height * sprite.aspect_ratio;
int height = sprite.height;
width *= img_scale * cam.zoom;
height *= img_scale * cam.zoom;
return SDL_Rect{
.x = static_cast<int>((pos.x - cam_pos.x + (cam.viewport_size.x / 2) - width / 2)),
.y = static_cast<int>((pos.y - cam_pos.y + (cam.viewport_size.y / 2) - height / 2)),
.w = width,
.h = height,
};
}
void SDLContext::draw(const RenderContext & ctx) {
SDL_RendererFlip render_flip
= (SDL_RendererFlip) ((SDL_FLIP_HORIZONTAL * ctx.sprite.flip.flip_x)
| (SDL_FLIP_VERTICAL * ctx.sprite.flip.flip_y));
SDL_Rect srcrect = this->get_src_rect(ctx.sprite);
SDL_Rect dstrect
= this->get_dst_rect(ctx.sprite, ctx.pos, ctx.cam, ctx.cam_pos, ctx.scale);
this->set_color_texture(ctx.sprite.sprite_image, ctx.sprite.color);
SDL_RenderCopyEx(this->game_renderer.get(), ctx.sprite.sprite_image.texture.get(),
&srcrect, &dstrect, ctx.angle, NULL, render_flip);
}
void SDLContext::set_camera(const Camera & cam) {
// resize window
int w, h;
SDL_GetWindowSize(this->game_window.get(), &w, &h);
if (w != cam.screen.x || h != cam.screen.y) {
SDL_SetWindowSize(this->game_window.get(), cam.screen.x, cam.screen.y);
}
double screen_aspect = cam.screen.x / cam.screen.y;
double viewport_aspect = cam.viewport_size.x / cam.viewport_size.y;
SDL_Rect view;
// calculate black bars
if (screen_aspect > viewport_aspect) {
// letterboxing
view.h = cam.screen.y / cam.zoom;
view.w = cam.screen.y * viewport_aspect;
view.x = (cam.screen.x - view.w) / 2;
view.y = 0;
} else {
// pillarboxing
view.h = cam.screen.x / viewport_aspect;
view.w = cam.screen.x / cam.zoom;
view.x = 0;
view.y = (cam.screen.y - view.h) / 2;
}
// set drawing area
SDL_RenderSetViewport(this->game_renderer.get(), &view);
SDL_RenderSetLogicalSize(this->game_renderer.get(), static_cast<int>(cam.viewport_size.x),
static_cast<int>(cam.viewport_size.y));
// set bg color
SDL_SetRenderDrawColor(this->game_renderer.get(), cam.bg_color.r, cam.bg_color.g,
cam.bg_color.b, cam.bg_color.a);
SDL_Rect bg = {
.x = 0,
.y = 0,
.w = static_cast<int>(cam.viewport_size.x),
.h = static_cast<int>(cam.viewport_size.y),
};
// fill bg color
SDL_RenderFillRect(this->game_renderer.get(), &bg);
}
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)
throw runtime_error(format("SDLContext: IMG_Load error: {}", SDL_GetError()));
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 runtime_error(format("SDLContext: Texture cannot be load from {}", path));
}
std::unique_ptr<SDL_Texture, std::function<void(SDL_Texture *)>> img_texture;
img_texture = {tmp_texture, [](SDL_Texture * texture) { SDL_DestroyTexture(texture); }};
SDL_SetTextureBlendMode(img_texture.get(), SDL_BLENDMODE_BLEND);
return img_texture;
}
ivec2 SDLContext::get_size(const Texture & ctx) {
ivec2 size;
SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &size.x, &size.y);
return size;
}
void SDLContext::delay(int ms) const { SDL_Delay(ms); }
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