GLES20.glBindTexture(GLES20.GL_TEXTURE_2D,getTextureId());
void glBindTexture(
GLenum target, GLuint texture)
;
target
指明了纹理要绑定到的目标。必须是下面中的一个:GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D, GL_TEXTURE_1D_ARRAY, GL_TEXTURE_2D_ARRAY, GL_TEXTURE_RECTANGLE, GL_TEXTURE_CUBE_MAP, GL_TEXTURE_CUBE_MAP_ARRAY, GL_TEXTURE_BUFFER, GL_TEXTURE_2D_MULTISAMPLE 或者 GL_TEXTURE_2D_MULTISAMPLE_ARRAY。
纹理常用类型:GLES20.GL_TEXTURE_2D
GLES11Ext.GL_TEXTURE_EXTERNAL_OES,这是Android特有的OES纹理,预览相机或者视频使用此纹理。
通用 2D 纹理 shader
顶点shader:
attribute vec4 vPosition;
attribute vec2 vCoord;
uniform mat4 vMatrix;
varying vec2 textureCoordinate;
void main(){
gl_Position = vMatrix*vPosition;
textureCoordinate = vCoord;
}
片元:
precision mediump float;
varying vec2 textureCoordinate;
uniform sampler2D vTexture;
void main() {
gl_FragColor = texture2D( vTexture, textureCoordinate );
}
//oem
attribute vec4 vPosition;
attribute vec2 vCoord;
uniform mat4 vMatrix;
uniform mat4 vCoordMatrix;
varying vec2 textureCoordinate;
void main(){
gl_Position = vMatrix*vPosition;
textureCoordinate = (vCoordMatrix*vec4(vCoord,0,1)).xy;
}
片元:
#extension GL_OES_EGL_image_external : require
precision mediump float;
varying vec2 textureCoordinate;
uniform samplerExternalOES vTexture;
void main() {
gl_FragColor = texture2D( vTexture, textureCoordinate );
}
Webrtc 中关于纹理绘制 android设备 为OES
绘制也很简单