mirror of https://github.com/kivy/kivy.git
103 lines
2.9 KiB
Python
103 lines
2.9 KiB
Python
'''
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Example usage of the effectwidget.
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Currently highly experimental.
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'''
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from kivy.app import App
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from kivy.uix.effectwidget import (EffectWidget, shader_header,
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shader_uniforms, effect_monochrome,
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effect_trivial, EffectFbo)
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from kivy.uix.image import Image
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from kivy.uix.floatlayout import FloatLayout
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from kivy.uix.scatter import Scatter
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from kivy.uix.button import Button
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plasma_shader = shader_header + '''
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uniform vec2 resolution;
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uniform float time;
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void main(void)
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{
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float x = gl_FragCoord.x;
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float y = gl_FragCoord.y;
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vec4 normal_rgba = texture2D(texture0, tex_coord0);
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float mov0 = x+y+cos(sin(time)*2.)*100.+sin(x/100.)*1000.;
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float mov1 = y / resolution.y / 0.2 + time;
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float mov2 = x / resolution.x / 0.2;
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float c1 = abs(sin(mov1+time)/2.+mov2/2.-mov1-mov2+time);
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float c2 = abs(sin(c1+sin(mov0/1000.+time)+
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sin(y/40.+time)+sin((x+y)/100.)*3.));
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float c3 = abs(sin(c2+cos(mov1+mov2+c2)+cos(mov2)+sin(x/1000.)));
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gl_FragColor = vec4( normal_rgba.x, c2, normal_rgba.y, 1.0);
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}
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'''
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shader_monochrome = shader_header + '''
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void main() {
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vec4 rgb = texture2D(texture0, tex_coord0);
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float c = (rgb.x + rgb.y + rgb.z) * 0.3333;
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gl_FragColor = vec4(c, c, c, 1.0);
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}
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'''
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shader_postprocessing = shader_header + '''
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uniform vec2 uvsize;
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uniform vec2 uvpos;
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void main(void)
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{
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vec2 q = tex_coord0 * vec2(1, -1);
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vec2 uv = 0.5 + (q-0.5);//*(0.9);// + 0.1*sin(0.2*time));
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vec3 oricol = texture2D(texture0,vec2(q.x,1.0-q.y)).xyz;
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vec3 col;
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col.r = texture2D(texture0,vec2(uv.x+0.003,-uv.y)).x;
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col.g = texture2D(texture0,vec2(uv.x+0.000,-uv.y)).y;
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col.b = texture2D(texture0,vec2(uv.x-0.003,-uv.y)).z;
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col = clamp(col*0.5+0.5*col*col*1.2,0.0,1.0);
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//col *= 0.5 + 0.5*16.0*uv.x*uv.y*(1.0-uv.x)*(1.0-uv.y);
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col *= vec3(0.8,1.0,0.7);
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col *= 0.9+0.1*sin(10.0*time+uv.y*1000.0);
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col *= 0.97+0.03*sin(110.0*time);
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float comp = smoothstep( 0.2, 0.7, sin(time) );
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//col = mix( col, oricol, clamp(-2.0+2.0*q.x+3.0*comp,0.0,1.0) );
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gl_FragColor = vec4(col,1.0);
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}
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'''
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class EffectApp(App):
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def build(self):
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# create our widget tree
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root = FloatLayout()
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sw = EffectWidget()
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root.add_widget(sw)
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#sw.fs = plasma_shader
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sw.effects.append(effect_monochrome)
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sw.add_widget(Image(size_hint=(1, 1), pos_hint={'x': 0, 'y': 0},
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source='colours.png', allow_stretch=True,
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keep_ratio=False))
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# add a button and scatter image inside the shader widget
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btn = Button(text='Hello world', size_hint=(None, None),
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pos_hint={'center_x': .25, 'center_y': .5})
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def press_func(*args):
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print 'button pressed!'
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btn.bind(on_press=press_func)
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sw.add_widget(btn)
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return root
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EffectApp().run()
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