1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
#include <SDL2/SDL.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 <cmath>
#include <cstddef>
#include <functional>
#include <memory>
#include <stdexcept>
#include "../api/Camera.h"
#include "../api/Config.h"
#include "../api/Sprite.h"
#include "../api/Texture.h"
#include "../util/Log.h"
#include "SDLContext.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();
}
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_SetRenderDrawColor(this->game_renderer.get(), 0, 0, 0, 255);
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);
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); }};
return img_texture;
}
int SDLContext::get_width(const Texture & ctx) const {
int w;
SDL_QueryTexture(ctx.texture.get(), NULL, NULL, &w, NULL);
return w;
}
int SDLContext::get_height(const Texture & ctx) const {
int h;
SDL_QueryTexture(ctx.texture.get(), NULL, NULL, NULL, &h);
return h;
}
void SDLContext::delay(int ms) const { SDL_Delay(ms); }
|