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
|
#include "atlas.h"
#include <cstring>
#include "cglm/types.h"
#include "mimalloc.h"
#include "utils.h"
static void wayc_atlas_gpu_usage_desc(struct sg_image_usage* usage) {
wayc_notnull(usage);
usage->immutable = false;
usage->dynamic_update = true;
}
static void wayc_atlas_gpu_desc(struct sg_image_desc* desc, u32 width,
u32 height, enum sg_pixel_format format) {
wayc_notnull(desc);
struct sg_image_usage usage = {};
wayc_atlas_gpu_usage_desc(&usage);
desc->type = SG_IMAGETYPE_2D;
desc->width = width;
desc->height = height;
desc->num_mipmaps = 1;
desc->pixel_format = format;
desc->usage = usage;
}
static inline usize wayc_atlas_size(u32 width, u32 height,
enum sg_pixel_format format) {
return sg_query_surface_pitch(format, width, height, 1);
}
enum atlas_error_e wayc_atlas_init(struct atlas_s* atlas, u32 width, u32 height,
enum sg_pixel_format format) {
wayc_notnull(atlas);
memset(atlas, 0, sizeof(*atlas));
bool success = false;
usize atlas_size = wayc_atlas_size(width, height, format);
u8* cpu_atlas = (u8*)mi_malloc(atlas_size);
wayc_defer_cond(mi_free(cpu_atlas), success, true);
memset(cpu_atlas, 0, atlas_size);
struct sg_image_desc desc = {};
wayc_atlas_gpu_desc(&desc, width, height, format);
struct sg_image gpu_atlas = sg_make_image(&desc);
if (sg_query_image_state(gpu_atlas) != SG_RESOURCESTATE_VALID)
return ATLAS_ERROR_GPU_ATLAS;
atlas->width = width;
atlas->height = height;
atlas->format = format;
atlas->cpu_atlas = cpu_atlas;
atlas->gpu_atlas = gpu_atlas;
success = true;
return ATLAS_ERROR_NONE;
}
enum atlas_error_e wayc_atlas_insert(struct atlas_s* atlas, u32 width,
u32 height, const u8* data, vec2* uv0,
vec2* uv1) {
wayc_notnull(atlas);
wayc_notnull(data);
wayc_notnull(uv0);
wayc_notnull(uv1);
struct atlas_packer_s* packer = &atlas->packer;
u32 x = WAYC_X(packer->cursor);
u32 y = WAYC_Y(packer->cursor);
// wrap
if (x + width > atlas->width) {
x = 0;
y += packer->row_height;
packer->row_height = 0;
}
if (y + height > atlas->height) return ATLAS_ERROR_ATLAS_FULL;
const int atlas_pitch =
sg_query_surface_pitch(atlas->format, atlas->width, 1, 1);
const int bpp = sg_query_surface_pitch(atlas->format, 1, 1, 1);
const int src_pitch = width * bpp;
for (u32 row = 0; row < height; row++) {
const u8* src_row = data + row * src_pitch;
u8* dst_row = atlas->cpu_atlas + (y + row) * atlas_pitch;
u8* dst_px = dst_row + x * bpp;
memcpy(dst_px, src_row, src_pitch);
}
const f32 W = (f32)atlas->width;
const f32 H = (f32)atlas->height;
WAYC_X(*uv0) = (f32)x / W;
WAYC_Y(*uv0) = (f32)y / H;
WAYC_X(*uv1) = (f32)(x + width) / W;
WAYC_Y(*uv1) = (f32)(y + height) / H;
WAYC_X(packer->cursor) = x + width;
WAYC_Y(packer->cursor) = y;
packer->row_height = wayc_max(packer->row_height, height);
atlas->cpu_dirty = true;
return ATLAS_ERROR_NONE;
}
enum atlas_error_e wayc_atlas_flush(struct atlas_s* atlas) {
wayc_notnull(atlas);
if (!atlas->cpu_dirty) return ATLAS_ERROR_NONE;
usize size = wayc_atlas_size(atlas->width, atlas->height, atlas->format);
struct sg_range range = {};
range.ptr = atlas->cpu_atlas;
range.size = size;
struct sg_image_data data = {};
data.mip_levels[0] = range;
sg_update_image(atlas->gpu_atlas, &data);
if (sg_query_image_state(atlas->gpu_atlas) != SG_RESOURCESTATE_VALID)
return ATLAS_ERROR_UPLOAD_FAILED;
atlas->cpu_dirty = false;
return ATLAS_ERROR_NONE;
}
void wayc_atlas_deinit(struct atlas_s* atlas) {
wayc_notnull(atlas);
enum sg_resource_state state = sg_query_image_state(atlas->gpu_atlas);
if (atlas->cpu_atlas == nullptr || state != SG_RESOURCESTATE_VALID) return;
sg_destroy_image(atlas->gpu_atlas);
mi_free(atlas->cpu_atlas);
atlas->width = 0;
atlas->height = 0;
atlas->cpu_atlas = nullptr;
atlas->gpu_atlas = {};
}
|
