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
|
#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 <iostream>
#include "../api/Sprite.h"
#include "../api/Texture.h"
#include "../api/Transform.h"
#include "../util/log.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;
}
this->game_window = SDL_CreateWindow(
"Crepe Game Engine", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
this->viewport.w, this->viewport.h, 0);
if (!this->game_window) {
// FIXME: throw exception
std::cerr << "Window could not be created! SDL_Error: "
<< SDL_GetError() << std::endl;
}
this->game_renderer
= SDL_CreateRenderer(this->game_window, -1, SDL_RENDERER_ACCELERATED);
if (!this->game_renderer) {
// FIXME: throw exception
std::cerr << "Renderer could not be created! SDL_Error: "
<< SDL_GetError() << std::endl;
SDL_DestroyWindow(this->game_window);
return;
}
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();
if (this->game_renderer != nullptr)
SDL_DestroyRenderer(this->game_renderer);
if (this->game_window != nullptr) {
SDL_DestroyWindow(this->game_window);
}
// 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); }
void SDLContext::present_screen() { SDL_RenderPresent(this->game_renderer); }
void SDLContext::draw(const Sprite & sprite, const Transform & transform,
const Camera & cam) {
static SDL_RendererFlip render_flip
= (SDL_RendererFlip) ((SDL_FLIP_HORIZONTAL * sprite.flip.flip_x)
| (SDL_FLIP_VERTICAL * sprite.flip.flip_y));
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),
};
double degrees = transform.rotation * 180 / M_PI;
SDL_RenderCopyEx(this->game_renderer, sprite.sprite_image->texture,
&srcrect,
&dstrect, degrees, 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, cam.bg_color.r, cam.bg_color.g,
cam.bg_color.b, cam.bg_color.a);
}
const uint64_t SDLContext::get_ticks() const { return SDL_GetTicks64(); }
SDL_Texture * SDLContext::texture_from_path(const char * path) {
dbg_trace();
SDL_Surface * tmp = IMG_Load(path);
if (!tmp) {
std::cerr << "Error surface " << IMG_GetError << std::endl;
}
SDL_Texture * created_texture
= SDL_CreateTextureFromSurface(this->game_renderer, tmp);
if (!created_texture) {
std::cerr << "Error could not create texture " << IMG_GetError
<< std::endl;
}
SDL_FreeSurface(tmp);
return created_texture;
}
int SDLContext::get_width(const Texture & ctx) {
int w;
SDL_QueryTexture(ctx.texture, NULL, NULL, &w, NULL);
return w;
}
int SDLContext::get_height(const Texture & ctx) {
int h;
SDL_QueryTexture(ctx.texture, NULL, NULL, NULL, &h);
return h;
}
|