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
223
224
225
226
227
228
229
230
231
232
233
|
#include "anim-atlas.hpp"
#include "compat/assert.hpp"
#include "shaders/shader.hpp"
#include "tile-defs.hpp"
#include "compat/exception.hpp"
#include <Corrade/Containers/BitArrayView.h>
#include <Corrade/Containers/StridedArrayView.h>
#include <Magnum/Math/Color.h>
#include <Magnum/GL/TextureFormat.h>
namespace floormat {
static constexpr const char name_array[][3] = { "n", "ne", "e", "se", "s", "sw", "w", "nw", };
static constexpr inline auto rot_count = size_t(rotation_COUNT);
static_assert(std::size(name_array) == rot_count);
static_assert(rot_count == 8);
uint8_t anim_atlas::rotation_to_index(StringView name)
{
for (uint8_t i = 0; i < rot_count; i++)
if (name == StringView{name_array[i]})
return i;
fm_throw("can't parse rotation name '{}'"_cf, name);
}
decltype(anim_atlas::_group_indices) anim_atlas::make_group_indices(const anim_def& a) noexcept
{
std::array<uint8_t, rot_count> array = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
const auto ngroups = a.groups.size();
for (auto i = 0uz; i < ngroups; i++)
array[rotation_to_index(a.groups[i].name)] = uint8_t(i);
return array;
}
anim_atlas::anim_atlas() noexcept = default;
anim_atlas::anim_atlas(String name, const ImageView2D& image, anim_def info) :
_name{move(name)}, _bitmask{make_bitmask(image)},
_info{move(info)}, _group_indices{make_group_indices(_info)}
{
fm_soft_assert(!_info.groups.isEmpty());
const Size<3> size = image.pixels().size();
fm_soft_assert(size[0]*size[1] == _info.pixel_size.product());
fm_soft_assert(size[2] >= 3 && size[2] <= 4);
for (const auto pixel_size = _info.pixel_size;
const auto& group : _info.groups)
for (const auto& fr : group.frames)
{
fm_soft_assert(fr.size.product() != 0);
fm_soft_assert(fr.offset < pixel_size);
fm_soft_assert(fr.offset + fr.size <= pixel_size);
}
_tex.setLabel(_name)
.setWrapping(GL::SamplerWrapping::ClampToEdge)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setMinificationFilter(GL::SamplerFilter::Nearest)
.setMaxAnisotropy(1)
.setBorderColor(Color4{1, 0, 0, 1})
.setStorage(1, GL::textureFormat(image.format()), image.size())
.setSubImage(0, {}, image);
}
anim_atlas::~anim_atlas() noexcept = default;
anim_atlas::anim_atlas(anim_atlas&&) noexcept = default;
anim_atlas& anim_atlas::operator=(anim_atlas&&) noexcept = default;
StringView anim_atlas::name() const noexcept { return _name; }
GL::Texture2D& anim_atlas::texture() noexcept { return _tex; }
const anim_def& anim_atlas::info() const noexcept { return _info; }
auto anim_atlas::group(rotation r) const -> const anim_group&
{
const auto group_idx = _group_indices[size_t(r)];
fm_soft_assert(group_idx != 0xff);
return _info.groups[group_idx];
}
auto anim_atlas::frame(rotation r, size_t frame) const -> const anim_frame&
{
const anim_group& g = group(r);
fm_soft_assert(frame < g.frames.size());
return g.frames[frame];
}
// get uv's for atlas frame
// ORDER: bottom left, top right, bottom left, top left
auto anim_atlas::texcoords_for_frame(rotation r, size_t i, bool mirror) const noexcept -> texcoords
{
const auto f = frame(r, i);
const Vector2 p0(f.offset), p1(f.size);
const auto x0 = p0.x()+.5f, x1 = p1.x()-1, y0 = p0.y()+.5f, y1 = p1.y()-1;
const auto size = _info.pixel_size;
if (!mirror)
return {{
{ (x0+x1) / size.x(), 1 - (y0+y1) / size.y() }, // bottom right
{ (x0+x1) / size.x(), 1 - y0 / size.y() }, // top right
{ x0 / size.x(), 1 - (y0+y1) / size.y() }, // bottom left
{ x0 / size.x(), 1 - y0 / size.y() }, // top left
}};
else
return {{
{ x0 / size.x(), 1 - (y0+y1) / size.y() }, // bottom right
{ x0 / size.x(), 1 - y0 / size.y() }, // top right
{ (x0+x1) / size.x(), 1 - (y0+y1) / size.y() }, // bottom left
{ (x0+x1) / size.x(), 1 - y0 / size.y() }, // top left
}};
}
// get vertexes for atlas frame
// ORDER: bottom left, top right, bottom left, top left
auto anim_atlas::frame_quad(const Vector3& center, rotation r, size_t i) const noexcept -> quad
{
enum : size_t { x, y, z };
const auto f = frame(r, i);
const auto gx = f.ground[x]*.5f, gy = f.ground[y]*.5f;
const auto size = Vector2(f.size);
const auto sx = size[x]*.5f, sy = size[y]*.5f;
const auto bottom_right = tile_shader::unproject({ sx - gx, sy - gy }),
top_right = tile_shader::unproject({ sx - gx, - gy }),
bottom_left = tile_shader::unproject({ - gx, sy - gy }),
top_left = tile_shader::unproject({ - gx, - gy });
const auto c = center + Vector3(group(r).offset);
return {{
{ c[x] + bottom_right[x], c[y] + bottom_right[y], c[z] },
{ c[x] + top_right[x], c[y] + top_right[y], c[z] },
{ c[x] + bottom_left[x], c[y] + bottom_left[y], c[z] },
{ c[x] + top_left[x], c[y] + top_left[y], c[z] },
}};
}
void anim_atlas::make_bitmask_(const ImageView2D& tex, BitArray& array)
{
const auto pixels = tex.pixels();
const auto size = pixels.size();
const auto width = size[1], height = size[0],
stride = (size_t)pixels.stride()[0], width0 = width & ~7u;
const auto* const data = (const unsigned char*)pixels.data();
auto* const dest = (unsigned char*)array.data();
fm_soft_assert(tex.pixelSize() == 4);
fm_soft_assert(pixels.stride()[1] == 4);
for (auto j = 0uz; j < height; j++)
{
constexpr unsigned char amin = 32;
auto i = 0uz;
for (; i < width0; i += 8)
{
const auto src_idx = (j*stride + i*4)+3, dst_idx = (height-j-1)*width+i >> 3;
const unsigned char* buf = data + src_idx;
auto value = (unsigned char)(
(unsigned char)(buf[0*4] >= amin) << 0 |
(unsigned char)(buf[1*4] >= amin) << 1 |
(unsigned char)(buf[2*4] >= amin) << 2 |
(unsigned char)(buf[3*4] >= amin) << 3 |
(unsigned char)(buf[4*4] >= amin) << 4 |
(unsigned char)(buf[5*4] >= amin) << 5 |
(unsigned char)(buf[6*4] >= amin) << 6 |
(unsigned char)(buf[7*4] >= amin) << 7);
dest[dst_idx] = value;
}
if (i < width)
{
dest[(height-j-1)*width+i >> 3] = 0;
do {
unsigned char alpha = data[(j*stride + i*4)+3];
array.set((height-j-1)*width + i, alpha >= amin);
} while (++i < width);
}
}
}
BitArray anim_atlas::make_bitmask(const ImageView2D& tex)
{
if (tex.pixelSize() == 3)
return {};
const auto size = tex.pixels().size();
auto array = BitArray{NoInit, size[0]*size[1]};
make_bitmask_(tex, array);
return array;
}
BitArrayView anim_atlas::bitmask() const
{
return _bitmask;
}
rotation anim_atlas::next_rotation_from(rotation r) const noexcept
{
constexpr auto count = size_t(rotation_COUNT);
for (auto i = size_t(r)+1; i < count; i++)
if (_group_indices[i] != 0xff)
return rotation(i);
for (auto i = 0uz; i < count; i++)
if (_group_indices[i] != 0xff)
return rotation(i);
fm_abort("where did the rotations go?!");
}
rotation anim_atlas::prev_rotation_from(rotation r) const noexcept
{
using ssize = std::make_signed_t<size_t>;
constexpr auto count = ssize(rotation_COUNT);
if (r < rotation_COUNT)
for (auto i = ssize(r)-1; i >= 0; i--)
if (_group_indices[size_t(i)] != 0xff)
return rotation(i);
for (auto i = count-1; i >= 0; i--)
if (_group_indices[size_t(i)] != 0xff)
return rotation(i);
fm_abort("where did the rotations go?!");
}
bool anim_atlas::check_rotation(rotation r) const noexcept
{
return r < rotation_COUNT && _group_indices[size_t(r)] < 0xff;
}
rotation anim_atlas::first_rotation() const noexcept
{
for (auto i = 0uz; i < rot_count; i++)
if (_group_indices[i] == 0)
return rotation(i);
fm_abort("unreachable! can't find first rotation");
}
} // namespace floormat
|
