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
|
#include "../../include/mgl/graphics/sprite.h"
#include "../../include/mgl/graphics/texture.h"
#include "../../include/mgl/window/window.h"
#include "../../include/mgl/mgl.h"
void mgl_sprite_init(mgl_sprite *self, mgl_texture *texture) {
self->texture = texture;
self->color = (mgl_color){ 255, 255, 255, 255 };
self->position = (mgl_vec2f){ 0.0f, 0.0f };
self->scale = (mgl_vec2f){ 1.0f, 1.0f };
self->origin = (mgl_vec2f){ 0.0f, 0.0f };
self->rotation = 0.0f;
}
void mgl_sprite_set_texture(mgl_sprite *self, mgl_texture *texture) {
self->texture = texture;
}
void mgl_sprite_set_position(mgl_sprite *self, mgl_vec2f position) {
self->position = position;
}
void mgl_sprite_set_color(mgl_sprite *self, mgl_color color) {
self->color = color;
}
void mgl_sprite_set_rotation(mgl_sprite *self, float degrees) {
self->rotation = degrees;
}
void mgl_sprite_set_origin(mgl_sprite *self, mgl_vec2f origin) {
self->origin = origin;
}
void mgl_sprite_set_size(mgl_sprite *self, mgl_vec2f size) {
if(!self->texture)
return;
self->scale.x = size.x / (float)self->texture->width;
self->scale.y = size.y / (float)self->texture->height;
}
void mgl_sprite_set_width(mgl_sprite *self, float width) {
if(!self->texture)
return;
self->scale.x = width / (float)self->texture->width;
self->scale.y = self->scale.x;
}
void mgl_sprite_set_height(mgl_sprite *self, float height) {
if(!self->texture)
return;
self->scale.y = height / (float)self->texture->height;
self->scale.x = self->scale.y;
}
mgl_vec2f mgl_sprite_get_size(const mgl_sprite *self) {
if(self->texture) {
return (mgl_vec2f){ (float)self->texture->width * self->scale.x, (float)self->texture->height * self->scale.y };
} else {
return (mgl_vec2f){ 0.0f, 0.0f };
}
}
/* TODO: Cache texture bind to not bind texture if its already bound and do not bind texture 0 */
void mgl_sprite_draw(mgl_context *context, mgl_sprite *sprite) {
if(!sprite->texture)
return;
mgl_window_set_texture_blend_func(context->current_window);
float texture_right = 1.0f;
float texture_bottom = 1.0f;
if(sprite->texture->pixel_coordinates) {
texture_right = sprite->texture->width;
texture_bottom = sprite->texture->height;
}
context->gl.glColor4ub(sprite->color.r, sprite->color.g, sprite->color.b, sprite->color.a);
mgl_texture_use(sprite->texture);
context->gl.glTranslatef(sprite->position.x, sprite->position.y, 0.0f);
context->gl.glRotatef(sprite->rotation, 0.0f, 0.0f, 1.0f);
context->gl.glBegin(GL_QUADS);
context->gl.glTexCoord2f(0.0f, 0.0f);
context->gl.glVertex3f(-sprite->origin.x * sprite->scale.x, -sprite->origin.y * sprite->scale.y, 0.0f);
context->gl.glTexCoord2f(texture_right, 0.0f);
context->gl.glVertex3f((sprite->texture->width - sprite->origin.x) * sprite->scale.x, -sprite->origin.y * sprite->scale.y, 0.0f);
context->gl.glTexCoord2f(texture_right, texture_bottom);
context->gl.glVertex3f((sprite->texture->width - sprite->origin.x) * sprite->scale.x, (sprite->texture->height - sprite->origin.y) * sprite->scale.y, 0.0f);
context->gl.glTexCoord2f(0.0f, texture_bottom);
context->gl.glVertex3f(-sprite->origin.x * sprite->scale.x, (sprite->texture->height - sprite->origin.y) * sprite->scale.y, 0.0f);
context->gl.glEnd();
mgl_texture_use(NULL);
context->gl.glLoadIdentity(); /* TODO: Remove, but what about glRotatef above */
mgl_window_set_render_blend_func(context->current_window);
}
|
