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 "graphics.h"
#include <cmath>
#ifdef USE_SDL
#include <SDL2/SDL.h>
// Platform-specific window handle structure
struct WindowHandle {
SDL_Window* window;
SDL_Renderer* renderer;
bool shouldClose;
WindowHandle() : window(nullptr), renderer(nullptr), shouldClose(false) {}
};
// Initialize SDL (called once)
static bool sdlInitialized = false;
static void ensureSDLInit() {
if (!sdlInitialized) {
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
// Handle error - in production, use proper error handling
return;
}
sdlInitialized = true;
}
}
WindowHandle* createWindow(const char* title, int width, int height) {
ensureSDLInit();
WindowHandle* handle = new WindowHandle();
handle->window = SDL_CreateWindow(
title,
SDL_WINDOWPOS_CENTERED,
SDL_WINDOWPOS_CENTERED,
width,
height,
SDL_WINDOW_SHOWN
);
if (!handle->window) {
delete handle;
return nullptr;
}
handle->renderer = SDL_CreateRenderer(
handle->window,
-1,
SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC
);
if (!handle->renderer) {
SDL_DestroyWindow(handle->window);
delete handle;
return nullptr;
}
// Enable alpha blending
SDL_SetRenderDrawBlendMode(handle->renderer, SDL_BLENDMODE_BLEND);
return handle;
}
void destroyWindow(WindowHandle* window) {
if (!window) return;
if (window->renderer) {
SDL_DestroyRenderer(window->renderer);
}
if (window->window) {
SDL_DestroyWindow(window->window);
}
delete window;
// Cleanup SDL if this was the last window
if (sdlInitialized) {
SDL_Quit();
sdlInitialized = false;
}
}
bool windowShouldClose(WindowHandle* window) {
if (!window) return true;
return window->shouldClose;
}
void pollEvents(WindowHandle* window) {
if (!window) return;
SDL_Event event;
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT) {
window->shouldClose = true;
}
else if (event.type == SDL_KEYDOWN) {
if (event.key.keysym.sym == SDLK_ESCAPE) {
window->shouldClose = true;
}
}
}
}
void swapBuffers(WindowHandle* window) {
if (!window || !window->renderer) return;
SDL_RenderPresent(window->renderer);
}
void clearScreen(WindowHandle* window, const Color& color) {
if (!window || !window->renderer) return;
SDL_SetRenderDrawColor(window->renderer, color.r, color.g, color.b, color.a);
SDL_RenderClear(window->renderer);
}
void setDrawColor(WindowHandle* window, const Color& color) {
if (!window || !window->renderer) return;
SDL_SetRenderDrawColor(window->renderer, color.r, color.g, color.b, color.a);
}
void drawLine(WindowHandle* window, int x1, int y1, int x2, int y2, const Color& color) {
if (!window || !window->renderer) return;
setDrawColor(window, color);
SDL_RenderDrawLine(window->renderer, x1, y1, x2, y2);
}
void drawRectangle(WindowHandle* window, int x, int y, int width, int height, const Color& color) {
if (!window || !window->renderer) return;
SDL_Rect rect = {x, y, width, height};
setDrawColor(window, color);
SDL_RenderDrawRect(window->renderer, &rect);
}
void drawFilledRectangle(WindowHandle* window, int x, int y, int width, int height, const Color& color) {
if (!window || !window->renderer) return;
SDL_Rect rect = {x, y, width, height};
setDrawColor(window, color);
SDL_RenderFillRect(window->renderer, &rect);
}
void drawPixel(WindowHandle* window, int x, int y, const Color& color) {
if (!window || !window->renderer) return;
setDrawColor(window, color);
SDL_RenderDrawPoint(window->renderer, x, y);
}
// Helper function for drawing circles using midpoint circle algorithm
void drawCircle(WindowHandle* window, int centerX, int centerY, int radius, const Color& color) {
if (!window || !window->renderer) return;
setDrawColor(window, color);
int x = 0;
int y = radius;
int d = 3 - 2 * radius;
auto drawCirclePoints = [&](int xc, int yc, int x, int y) {
SDL_RenderDrawPoint(window->renderer, xc + x, yc + y);
SDL_RenderDrawPoint(window->renderer, xc - x, yc + y);
SDL_RenderDrawPoint(window->renderer, xc + x, yc - y);
SDL_RenderDrawPoint(window->renderer, xc - x, yc - y);
SDL_RenderDrawPoint(window->renderer, xc + y, yc + x);
SDL_RenderDrawPoint(window->renderer, xc - y, yc + x);
SDL_RenderDrawPoint(window->renderer, xc + y, yc - x);
SDL_RenderDrawPoint(window->renderer, xc - y, yc - x);
};
drawCirclePoints(centerX, centerY, x, y);
while (y >= x) {
x++;
if (d > 0) {
y--;
d = d + 4 * (x - y) + 10;
} else {
d = d + 4 * x + 6;
}
drawCirclePoints(centerX, centerY, x, y);
}
}
void drawFilledCircle(WindowHandle* window, int centerX, int centerY, int radius, const Color& color) {
if (!window || !window->renderer) return;
setDrawColor(window, color);
for (int y = -radius; y <= radius; y++) {
for (int x = -radius; x <= radius; x++) {
if (x * x + y * y <= radius * radius) {
SDL_RenderDrawPoint(window->renderer, centerX + x, centerY + y);
}
}
}
}
void delay(uint32_t milliseconds) {
SDL_Delay(milliseconds);
}
#endif // USE_SDL
#ifdef USE_WIN32
// Win32 implementation would go here
// For now, this is a placeholder
#error "Win32 backend not yet implemented"
#endif
#ifdef USE_X11
// X11 implementation would go here
// For now, this is a placeholder
#error "X11 backend not yet implemented"
#endif
|
