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Merge pull request #1424 from pedroSG94/feature/crop-filter
add CropFilterRender
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125 changes: 125 additions & 0 deletions
125
encoder/src/main/java/com/pedro/encoder/input/gl/render/filters/CropFilterRender.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,125 @@ | ||
| /* | ||
| * Copyright (C) 2023 pedroSG94. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package com.pedro.encoder.input.gl.render.filters | ||
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| import android.content.Context | ||
| import android.opengl.GLES20 | ||
| import android.opengl.Matrix | ||
| import android.os.Build | ||
| import androidx.annotation.RequiresApi | ||
| import com.pedro.encoder.R | ||
| import com.pedro.encoder.input.gl.render.BaseRenderOffScreen | ||
| import com.pedro.encoder.utils.gl.GlUtil | ||
| import java.nio.ByteBuffer | ||
| import java.nio.ByteOrder | ||
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| /** | ||
| * Created by pedro on 6/3/24. | ||
| */ | ||
| @RequiresApi(Build.VERSION_CODES.JELLY_BEAN_MR2) | ||
| class CropFilterRender: BaseFilterRender() { | ||
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| //rotation matrix | ||
| private val squareVertexDataFilter = floatArrayOf( | ||
| // X, Y, Z, U, V | ||
| -1f, -1f, 0f, 0f, 0f, //bottom left | ||
| 1f, -1f, 0f, 1f, 0f, //bottom right | ||
| -1f, 1f, 0f, 0f, 1f, //top left | ||
| 1f, 1f, 0f, 1f, 1f | ||
| ) | ||
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| private var program = -1 | ||
| private var aPositionHandle = -1 | ||
| private var aTextureHandle = -1 | ||
| private var uMVPMatrixHandle = -1 | ||
| private var uSTMatrixHandle = -1 | ||
| private var uSamplerHandle = -1 | ||
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| private var positionMatrix = FloatArray(16) | ||
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| init { | ||
| squareVertex = | ||
| ByteBuffer.allocateDirect(squareVertexDataFilter.size * BaseRenderOffScreen.FLOAT_SIZE_BYTES) | ||
| .order(ByteOrder.nativeOrder()) | ||
| .asFloatBuffer() | ||
| squareVertex.put(squareVertexDataFilter).position(0) | ||
| Matrix.setIdentityM(MVPMatrix, 0) | ||
| Matrix.setIdentityM(STMatrix, 0) | ||
| Matrix.setIdentityM(positionMatrix, 0) | ||
| } | ||
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| override fun initGlFilter(context: Context?) { | ||
| val vertexShader = GlUtil.getStringFromRaw(context, R.raw.simple_vertex) | ||
| val fragmentShader = GlUtil.getStringFromRaw(context, R.raw.simple_fragment) | ||
| program = GlUtil.createProgram(vertexShader, fragmentShader) | ||
| aPositionHandle = GLES20.glGetAttribLocation(program, "aPosition") | ||
| aTextureHandle = GLES20.glGetAttribLocation(program, "aTextureCoord") | ||
| uMVPMatrixHandle = GLES20.glGetUniformLocation(program, "uMVPMatrix") | ||
| uSTMatrixHandle = GLES20.glGetUniformLocation(program, "uSTMatrix") | ||
| uSamplerHandle = GLES20.glGetUniformLocation(program, "uSampler") | ||
| } | ||
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| override fun drawFilter() { | ||
| GLES20.glUseProgram(program) | ||
| squareVertex.position(BaseRenderOffScreen.SQUARE_VERTEX_DATA_POS_OFFSET) | ||
| GLES20.glVertexAttribPointer( | ||
| aPositionHandle, 3, GLES20.GL_FLOAT, false, | ||
| BaseRenderOffScreen.SQUARE_VERTEX_DATA_STRIDE_BYTES, squareVertex | ||
| ) | ||
| GLES20.glEnableVertexAttribArray(aPositionHandle) | ||
| squareVertex.position(BaseRenderOffScreen.SQUARE_VERTEX_DATA_UV_OFFSET) | ||
| GLES20.glVertexAttribPointer( | ||
| aTextureHandle, 2, GLES20.GL_FLOAT, false, | ||
| BaseRenderOffScreen.SQUARE_VERTEX_DATA_STRIDE_BYTES, squareVertex | ||
| ) | ||
| GLES20.glEnableVertexAttribArray(aTextureHandle) | ||
| GLES20.glUniformMatrix4fv(uMVPMatrixHandle, 1, false, MVPMatrix, 0) | ||
| GLES20.glUniformMatrix4fv(uSTMatrixHandle, 1, false, STMatrix, 0) | ||
| GLES20.glUniform1i(uSamplerHandle, 4) | ||
| GLES20.glActiveTexture(GLES20.GL_TEXTURE4) | ||
| GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, previousTexId) | ||
| } | ||
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| override fun release() { | ||
| GLES20.glDeleteProgram(program) | ||
| } | ||
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| /** | ||
| * Set crop area in percentage. Starting from top left corner. | ||
| * Moved in right bottom | ||
| */ | ||
| fun setCropArea(offsetX: Float, offsetY: Float, width: Float, height: Float) { | ||
| val scaleX = 1f / (width / 100f) | ||
| val scaleY = 1f / (height / 100f) | ||
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| val initialX = 1f - (1f / scaleX) | ||
| val initialY = -(1f - (1f / scaleY)) | ||
| val percentX = initialX / (50f - (width / 2f)) | ||
| val percentY = -initialY / (50f - (height / 2f)) | ||
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| val oX = initialX - (offsetX * percentX) | ||
| val oY = initialY + (offsetY * percentY) | ||
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| //reset matrix | ||
| Matrix.setIdentityM(positionMatrix, 0) | ||
| Matrix.setIdentityM(MVPMatrix, 0) | ||
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| Matrix.scaleM(positionMatrix, 0, scaleX, scaleY, 0f) | ||
| Matrix.translateM(positionMatrix, 0, oX, oY, 0f) | ||
| Matrix.multiplyMM(MVPMatrix, 0, positionMatrix, 0, MVPMatrix, 0) | ||
| } | ||
| } |
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