GCC Code Coverage Report

Directory: src/
Coverage: low: ≥ 0% medium: ≥ 75.0% high: ≥ 90.0%
Coverage Exec / Excl / Total
Lines: 100.0% 106 / 0 / 106
Functions: 100.0% 16 / 0 / 16
Branches: 100.0% 28 / 0 / 28
graphicglut/src/graphGlutCallbacks.c
Line Branch Exec Source
1 /*
2 * SPDX-License-Identifier: MIT
3 *
4 * Copyright (c) 2025 Manuel Hernández Méndez
5 *
6 * Authors:
7 * Manuel Hernández Méndez <maherme.dev@gmail.com>
8 */
9
10 #include "graphGlutCallbacks.h"
11 #include "graph.h"
12 #include "list.h"
13 #include "utils.h"
14 #include <GL/glut.h>
15
16 typedef struct ctx_node
17 {
18 sprite_t *sprite;
19 struct list_head node;
20 } ctx_node_t;
21
22 struct list_head render_layers[NUM_RENDER_LAYERS];
23
24 typedef struct viewport
25 {
26 int x, y;
27 int w, h;
28 } viewport_t;
29
30 static struct
31 {
32 int width;
33 int height;
34 viewport_t game_vp;
35 viewport_t hud_vp;
36 } window;
37
38 void
39 8 graphRegisterPrintInit(void)
40 {
41
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 40 for (int i = 0; i < NUM_RENDER_LAYERS; i++)
42 {
43 32 init_list_head(&render_layers[i]);
44 }
45 8 }
46
47 int
48 8 graphRegisterPrint(sprite_t *sprite)
49 {
50
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 8 if (!sprite)
51 {
52 1 return -1;
53 }
54
55 7 ctx_node_t *n = utilsCalloc(1, sizeof(*n));
56 7 n->sprite = sprite;
57 7 list_add_tail(&n->node, &render_layers[sprite->layer]);
58 7 graphCreateImage(sprite);
59
60 7 return 0;
61 }
62
63 int
64 5 graphUnregisterPrint(sprite_t *sprite)
65 {
66
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 5 if (!sprite)
67 {
68 1 return -1;
69 }
70
71 4 int removed = 0;
72
73
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 20 for (int i = 0; i < NUM_RENDER_LAYERS; i++)
74 {
75 ctx_node_t *n, *tmp;
76
77
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 22 list_for_each_entry_safe(n, tmp, &render_layers[i], node)
78 {
79
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 6 if (n->sprite == sprite)
80 {
81 3 graphDestroyImage(n->sprite);
82 3 list_del(&n->node);
83 3 UTILS_FREE(n);
84 3 removed++;
85 }
86 }
87 }
88
89 4 return removed;
90 }
91
92 static void
93 2 drawLayers(int first, int last)
94 {
95
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 6 for (int i = first; i <= last; i++)
96 {
97 ctx_node_t *n;
98
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 6 list_for_each_entry(n, &render_layers[i], node)
99 {
100 2 graphPrintImage(n->sprite);
101 }
102 }
103 2 }
104
105 static void
106 1 setupGameViewport(void)
107 {
108 1 glViewport(window.game_vp.x, window.game_vp.y, window.game_vp.w, window.game_vp.h);
109
110 1 glMatrixMode(GL_PROJECTION);
111 1 glLoadIdentity();
112 1 gluOrtho2D(0, GAME_WIDTH, 0, GAME_HEIGHT);
113
114 1 glMatrixMode(GL_MODELVIEW);
115 1 glLoadIdentity();
116 1 }
117
118 static void
119 1 setupHudViewport(void)
120 {
121 1 glViewport(window.hud_vp.x, window.hud_vp.y, window.hud_vp.w, window.hud_vp.h);
122
123 1 glMatrixMode(GL_PROJECTION);
124 1 glLoadIdentity();
125 1 gluOrtho2D(0, GAME_WIDTH, 0, HUD_HEIGHT);
126
127 1 glMatrixMode(GL_MODELVIEW);
128 1 glLoadIdentity();
129 1 }
130
131 void
132 1 graphGlutDisplay(void)
133 {
134 1 glClear(GL_COLOR_BUFFER_BIT);
135
136 1 setupGameViewport();
137 1 drawLayers(LAYER_BACKGROUND, LAYER_EFFECTS);
138 1 graphPrintBorder(0, 0, GAME_WIDTH, GAME_HEIGHT);
139
140 1 setupHudViewport();
141 1 drawLayers(LAYER_HUD, LAYER_HUD);
142 1 graphPrintBorder(0, 0, GAME_WIDTH, HUD_HEIGHT);
143
144 1 glutSwapBuffers();
145 1 }
146
147 static void
148 2 calculateViewports(void)
149 {
150 2 int scale_x = window.width / GAME_WIDTH;
151 2 int scale_y = window.height / (GAME_HEIGHT + HUD_HEIGHT);
152 2 int scale = scale_x < scale_y ? scale_x : scale_y;
153
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 2 if (scale < 1)
154 {
155 1 scale = 1;
156 }
157
158 2 int game_width = GAME_WIDTH * scale;
159 2 int game_height = GAME_HEIGHT * scale;
160 2 int hud_width = game_width;
161 2 int hud_height = HUD_HEIGHT * scale;
162
163 2 int vp_x = (window.width - game_width) / 2;
164 2 int vp_y = (window.height - (game_height + hud_height)) / 2;
165
166 2 window.game_vp.x = vp_x;
167 2 window.game_vp.y = hud_height + vp_y;
168 2 window.game_vp.w = game_width;
169 2 window.game_vp.h = game_height;
170
171 2 window.hud_vp.x = vp_x;
172 2 window.hud_vp.y = vp_y;
173 2 window.hud_vp.w = hud_width;
174 2 window.hud_vp.h = hud_height;
175 2 }
176
177 void
178 2 graphGlutReshape(int w, int h)
179 {
180 2 window.width = w;
181 2 window.height = h;
182
183 2 calculateViewports();
184 2 }
185
186 #ifdef UNIT_TESTING
187 void
188 16 helperUT_graphGlutResetRegisteredSprites(void)
189 {
190
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 80 for (int i = 0; i < NUM_RENDER_LAYERS; i++)
191 {
192
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 70 list_clear_with_free(&render_layers[i], ctx_node_t, node);
193 }
194 16 }
195
196 bool
197 14 helperUT_graphGlutSpriteIsRegistered(sprite_t *sprite)
198 {
199
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 30 for (int i = 0; i < NUM_RENDER_LAYERS; i++)
200 {
201 ctx_node_t *n;
202
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 34 list_for_each_entry(n, &render_layers[i], node)
203 {
204
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 18 if (n->sprite == sprite)
205 {
206 10 return true;
207 }
208 }
209 }
210
211 4 return false;
212 }
213
214 void
215 2 helperUT_graphGlutInjectSprite(sprite_t *sprite)
216 {
217 2 ctx_node_t *n = utilsCalloc(1, sizeof(*n));
218 2 n->sprite = sprite;
219 2 list_add(&n->node, &render_layers[sprite->layer]);
220 2 }
221
222 void
223 1 helperUT_graphGlutSetGameViewport(void *game_vp)
224 {
225 1 window.game_vp = *(viewport_t *)game_vp;
226 1 }
227
228 void
229 1 helperUT_graphGlutSetHudViewport(void *hud_vp)
230 {
231 1 window.hud_vp = *(viewport_t *)hud_vp;
232 1 }
233
234 void *
235 2 helperUT_graphGlutGetGameViewport(void)
236 {
237 2 return &window.game_vp;
238 }
239
240 void *
241 2 helperUT_graphGlutGetHudViewport(void)
242 {
243 2 return &window.hud_vp;
244 }
245 #endif
246