8a5f40b7b3
Drawing now supports defining both the source and destination bounds, which is equivalent to clipping and scaling an image. LGTM=nigeltao R=nigeltao, crawshaw CC=adg, golang-codereviews https://golang.org/cl/144480043
29 lines
591 B
Go
29 lines
591 B
Go
// Copyright 2014 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package glutil
|
|
|
|
const vertexShader = `#version 100
|
|
uniform mat3 mvp;
|
|
uniform mat3 uvp;
|
|
attribute vec3 pos;
|
|
attribute vec2 inUV;
|
|
varying vec2 UV;
|
|
void main() {
|
|
vec3 p = pos;
|
|
p.z = 1.0;
|
|
gl_Position = vec4(mvp * p, 1);
|
|
UV = (uvp * vec3(inUV, 1)).xy;
|
|
}
|
|
`
|
|
|
|
const fragmentShader = `#version 100
|
|
precision mediump float;
|
|
varying vec2 UV;
|
|
uniform sampler2D textureSample;
|
|
void main(){
|
|
gl_FragColor = texture2D(textureSample, UV);
|
|
}
|
|
`
|