forked from dskinner/material
/
material.go
289 lines (241 loc) · 6.87 KB
/
material.go
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
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
package material
// TODO fonts
// https://www.mapbox.com/blog/text-signed-distance-fields/
import (
"dasa.cc/material/glutil"
"dasa.cc/material/icon"
"dasa.cc/material/simplex"
"golang.org/x/mobile/exp/f32"
"golang.org/x/mobile/gl"
)
var (
DefaultFilter = glutil.TextureFilter(gl.LINEAR, gl.LINEAR)
DefaultWrap = glutil.TextureWrap(gl.REPEAT, gl.REPEAT)
)
type Material struct {
Box
col4, col8, col12 int
BehaviorFlags Behavior
Texture glutil.Texture
uvbuf glutil.FloatBuffer
uicon gl.Uniform
icx, icy float32
cr, cg, cb, ca float32 // color for uniform
vbuf glutil.FloatBuffer // vertices
ibuf glutil.UintBuffer // indices
prg0, prg1 glutil.Program // material and shadow TODO globalize with batch op?
ap0, ap1 gl.Attrib // buffer pointer
uc0, uc1 gl.Uniform // color
uw0, uv0, up0 gl.Uniform // material projection
uw1, uv1, up1 gl.Uniform // shadow projection
us1 gl.Uniform
utex0 gl.Uniform
atc0 gl.Attrib
// TODO tmp impl
IsCircle bool
ucirc0 gl.Uniform
ucirc1 gl.Uniform
}
func (mtrl *Material) Span(col4, col8, col12 int) {
mtrl.col4, mtrl.col8, mtrl.col12 = col4, col8, col12
}
func New(ctx gl.Context, color Color) *Material {
mtrl := &Material{
BehaviorFlags: DescriptorRaised,
icx: -1,
icy: -1,
}
mtrl.cr, mtrl.cg, mtrl.cb, mtrl.ca = color.RGBA()
// material has user-defined width and height, and precisely 1dp depth.
mtrl.vbuf = glutil.NewFloatBuffer(ctx, []float32{
0, 0, 0,
0, 1, 0,
1, 1, 0,
1, 0, 0,
0, 0, -1,
0, 1, -1,
1, 1, -1,
1, 0, -1,
}, gl.STATIC_DRAW)
mtrl.ibuf = glutil.NewUintBuffer(ctx, []uint32{
0, 2, 1, 0, 3, 2,
2, 7, 6, 2, 3, 7,
7, 3, 0, 7, 0, 4,
4, 6, 7, 4, 5, 6,
6, 1, 2, 6, 5, 1,
1, 5, 4, 1, 4, 0,
}, gl.STATIC_DRAW)
n := float32(0.0234375)
mtrl.uvbuf = glutil.NewFloatBuffer(ctx, []float32{
0, n,
0, 0,
n, 0,
n, n,
0, n,
0, 0,
n, 0,
n, n,
}, gl.STATIC_DRAW)
mtrl.reloadProgram(ctx)
return mtrl
}
func (mtrl *Material) reloadProgram(ctx gl.Context) {
mtrl.prg0.CreateAndLink(ctx, glutil.ShaderAsset(gl.VERTEX_SHADER, "material-vert.glsl"), glutil.ShaderAsset(gl.FRAGMENT_SHADER, "material-frag.glsl"))
mtrl.uw0 = mtrl.prg0.Uniform(ctx, "world")
mtrl.uv0 = mtrl.prg0.Uniform(ctx, "view")
mtrl.up0 = mtrl.prg0.Uniform(ctx, "proj")
mtrl.uc0 = mtrl.prg0.Uniform(ctx, "color")
mtrl.ap0 = mtrl.prg0.Attrib(ctx, "position")
mtrl.utex0 = mtrl.prg0.Uniform(ctx, "tex0")
mtrl.atc0 = mtrl.prg0.Attrib(ctx, "tc0")
mtrl.uicon = mtrl.prg0.Uniform(ctx, "icon")
mtrl.ucirc0 = mtrl.prg0.Uniform(ctx, "circle")
mtrl.prg1.CreateAndLink(ctx, glutil.ShaderAsset(gl.VERTEX_SHADER, "material-shadow-vert.glsl"), glutil.ShaderAsset(gl.FRAGMENT_SHADER, "material-shadow-frag.glsl"))
mtrl.uw1 = mtrl.prg1.Uniform(ctx, "world")
mtrl.uv1 = mtrl.prg1.Uniform(ctx, "view")
mtrl.up1 = mtrl.prg1.Uniform(ctx, "proj")
mtrl.uc1 = mtrl.prg1.Uniform(ctx, "color")
mtrl.us1 = mtrl.prg1.Uniform(ctx, "size")
mtrl.ucirc1 = mtrl.prg1.Uniform(ctx, "circle")
mtrl.ap1 = mtrl.prg1.Attrib(ctx, "position")
}
func (mtrl *Material) SetColor(color Color) {
mtrl.cr, mtrl.cg, mtrl.cb, mtrl.ca = color.RGBA()
}
func (mtrl *Material) SetIcon(ic icon.Icon) {
mtrl.icx, mtrl.icy = ic.Texcoords()
}
func (mtrl *Material) Bind(lpro *simplex.Program) {
mtrl.Box = NewBox(lpro)
}
func (mtrl *Material) World() *f32.Mat4 { return &mtrl.world }
// TODO seems to slow down goimport ...
var shdr, shdg, shdb, shda = BlueGrey900.RGBA()
func min(a, b float32) float32 {
if a < b {
return a
}
return b
}
func max(a, b float32) float32 {
if a > b {
return a
}
return b
}
func (mtrl *Material) Draw(ctx gl.Context, view, proj f32.Mat4) {
if mtrl.BehaviorFlags&DescriptorRaised == DescriptorRaised {
// provide larger world mat for shadows to draw within
m := mtrl.world
w, h := m[0][0], m[1][1]
z := m[2][3]
s := float32(1.07) + (z * 0.01414)
sw := m[0][0]*s - w
sh := m[1][1]*s - h
s = min(sw, sh)
m[0][0] += s
m[1][1] += s
m[0][3] -= (m[0][0] - w) / 2
m[1][3] -= (m[1][1] - h) / 2
m[1][3] -= 2 // shadow y-offset
// draw shadow
mtrl.prg1.Use(ctx)
mtrl.prg1.Mat4(ctx, mtrl.uw1, m)
mtrl.prg1.Mat4(ctx, mtrl.uv1, view)
mtrl.prg1.Mat4(ctx, mtrl.up1, proj)
mtrl.prg1.U2f(ctx, mtrl.us1, w, h)
mtrl.prg1.U4f(ctx, mtrl.uc1, shdr, shdg, shdb, shda)
if mtrl.IsCircle {
mtrl.prg1.U1i(ctx, mtrl.ucirc1, 1)
}
mtrl.vbuf.Bind(ctx)
mtrl.ibuf.Bind(ctx)
mtrl.prg1.Pointer(ctx, mtrl.ap1, 3)
mtrl.ibuf.Draw(ctx, mtrl.prg1, gl.TRIANGLES)
}
// draw material
mtrl.prg0.Use(ctx)
mtrl.prg0.Mat4(ctx, mtrl.uw0, mtrl.world)
mtrl.prg0.Mat4(ctx, mtrl.uv0, view)
mtrl.prg0.Mat4(ctx, mtrl.up0, proj)
alpha := mtrl.ca
if mtrl.BehaviorFlags&DescriptorFlat == DescriptorFlat {
alpha = 0
}
mtrl.prg0.U4f(ctx, mtrl.uc0, mtrl.cr, mtrl.cg, mtrl.cb, alpha)
mtrl.prg0.U2f(ctx, mtrl.uicon, mtrl.icx, mtrl.icy)
if mtrl.IsCircle {
mtrl.prg0.U1i(ctx, mtrl.ucirc0, 1)
}
mtrl.vbuf.Bind(ctx)
mtrl.ibuf.Bind(ctx)
mtrl.prg0.Pointer(ctx, mtrl.ap0, 3)
if mtrl.Texture.Value > 0 {
mtrl.Texture.Bind(ctx, DefaultFilter, DefaultWrap)
mtrl.prg0.U1i(ctx, mtrl.utex0, int(mtrl.Texture.Value-1))
mtrl.uvbuf.Bind(ctx)
mtrl.prg0.Pointer(ctx, mtrl.atc0, 2)
}
mtrl.ibuf.Draw(ctx, mtrl.prg0, gl.TRIANGLES)
}
func (mtrl *Material) M() *Material { return mtrl }
func (mtrl *Material) Contains(tx, ty float32) bool {
x, y, w, h := mtrl.world[0][3], mtrl.world[1][3], mtrl.world[0][0], mtrl.world[1][1]
return x <= tx && tx <= x+w && y <= ty && ty <= y+h
}
type Button struct {
*Material
OnPress func()
}
// TODO https://www.google.com/design/spec/layout/structure.html#structure-toolbars
type Toolbar struct {
*Material
Nav *Button
actions []*Button
}
func (bar *Toolbar) AddAction(btn *Button) {
btn.BehaviorFlags = DescriptorFlat
btn.SetColor(Black)
bar.actions = append(bar.actions, btn)
}
func (tb *Toolbar) Constraints(env *Environment) []simplex.Constraint {
stp := env.Grid.StepSize()
var (
width, height float32
btnsize float32
)
switch env.Grid.Columns {
case 4:
width = float32(tb.col4) * stp
height = Dp(56).Px()
btnsize = Dp(24).Px()
case 8:
width = float32(tb.col8) * stp
height = Dp(56).Px()
btnsize = Dp(24).Px()
case 12:
width = float32(tb.col12) * stp
height = Dp(64).Px()
btnsize = Dp(32).Px()
}
nav := tb.Nav
cns := []simplex.Constraint{
tb.Width(width), tb.Height(height), tb.Z(4),
tb.StartIn(env.Box, env.Grid.Margin), tb.TopIn(env.Box, env.Grid.Margin),
nav.Width(btnsize), nav.Height(btnsize), nav.Z(5),
nav.StartIn(tb.Box, env.Grid.Gutter),
nav.CenterVerticalIn(tb.Box),
}
for i, btn := range tb.actions {
cns = append(cns, btn.Width(btnsize), btn.Height(btnsize), btn.Z(5), btn.CenterVerticalIn(tb.Box))
if i == 0 {
cns = append(cns, btn.EndIn(tb.Box, env.Grid.Gutter))
} else {
cns = append(cns, btn.Before(tb.actions[i-1].Box, env.Grid.Gutter))
}
}
return cns
}
type NavDrawer struct {
*Material
}