在BlendModeFilter中使用ColorMatrix或HexColor – Android？

目前BlendModes（减法，排除等）使用LauncherImage作为掩码。 我可以将这些BlendModes应用于ColorMatrix吗？

我正在使用GPUImageLibrary

colorMatrix[ 0.393, 0.7689999, 0.18899999, 0, 0, 0.349, 0.6859999, 0.16799999, 0, 0, 0.272, 0.5339999, 0.13099999, 0, 0, 0, 0, 0, 1, 0]; 

SubtractBlendFilter.java

 public class GPUImageSubtractBlendFilter extends GPUImageTwoInputFilter { public static final String SUBTRACT_BLEND_FRAGMENT_SHADER = "varying highp vec2 textureCoordinate;\n" + " varying highp vec2 textureCoordinate2;\n" + "\n" + " uniform sampler2D inputImageTexture;\n" + " uniform sampler2D inputImageTexture2;\n" + " \n" + " void main()\n" + " {\n" + " lowp vec4 textureColor = texture2D(inputImageTexture, textureCoordinate);\n" + " lowp vec4 textureColor2 = texture2D(inputImageTexture2, textureCoordinate2);\n" + "\n" + " gl_FragColor = vec4(textureColor.rgb - textureColor2.rgb, textureColor.a);\n" + " }"; public GPUImageSubtractBlendFilter() { super(SUBTRACT_BLEND_FRAGMENT_SHADER); } } 

GPUIMageTwoInputFilter.java

 public class GPUImageTwoInputFilter extends GPUImageFilter { private static final String VERTEX_SHADER = "attribute vec4 position;\n" + "attribute vec4 inputTextureCoordinate;\n" + "attribute vec4 inputTextureCoordinate2;\n" + " \n" + "varying vec2 textureCoordinate;\n" + "varying vec2 textureCoordinate2;\n" + " \n" + "void main()\n" + "{\n" + " gl_Position = position;\n" + " textureCoordinate = inputTextureCoordinate.xy;\n" + " textureCoordinate2 = inputTextureCoordinate2.xy;\n" + "}"; public int mFilterSecondTextureCoordinateAttribute; public int mFilterInputTextureUniform2; public int mFilterSourceTexture2 = OpenGlUtils.NO_TEXTURE; private ByteBuffer mTexture2CoordinatesBuffer; private Bitmap mBitmap; public GPUImageTwoInputFilter(String fragmentShader) { this(VERTEX_SHADER, fragmentShader); } public GPUImageTwoInputFilter(String vertexShader, String fragmentShader) { super(vertexShader, fragmentShader); setRotation(Rotation.NORMAL, false, false); } @Override public void onInit() { super.onInit(); mFilterSecondTextureCoordinateAttribute = GLES20.glGetAttribLocation(getProgram(), "inputTextureCoordinate2"); mFilterInputTextureUniform2 = GLES20.glGetUniformLocation(getProgram(), "inputImageTexture2"); // This does assume a name of "inputImageTexture2" for second input texture in the fragment shader GLES20.glEnableVertexAttribArray(mFilterSecondTextureCoordinateAttribute); if (mBitmap != null&&!mBitmap.isRecycled()) { setBitmap(mBitmap); } } public void setBitmap(final Bitmap bitmap) { if (bitmap != null && bitmap.isRecycled()) { return; } mBitmap = bitmap; if (mBitmap == null) { return; } runOnDraw(new Runnable() { public void run() { if (mFilterSourceTexture2 == OpenGlUtils.NO_TEXTURE) { if (bitmap == null || bitmap.isRecycled()) { return; } GLES20.glActiveTexture(GLES20.GL_TEXTURE3); mFilterSourceTexture2 = OpenGlUtils.loadTexture(bitmap, OpenGlUtils.NO_TEXTURE, false); } } }); } public Bitmap getBitmap() { return mBitmap; } public void recycleBitmap() { if (mBitmap != null && !mBitmap.isRecycled()) { mBitmap.recycle(); mBitmap = null; } } public void onDestroy() { super.onDestroy(); GLES20.glDeleteTextures(1, new int[]{ mFilterSourceTexture2 }, 0); mFilterSourceTexture2 = OpenGlUtils.NO_TEXTURE; } @Override protected void onDrawArraysPre() { GLES20.glEnableVertexAttribArray(mFilterSecondTextureCoordinateAttribute); GLES20.glActiveTexture(GLES20.GL_TEXTURE3); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mFilterSourceTexture2); GLES20.glUniform1i(mFilterInputTextureUniform2, 3); mTexture2CoordinatesBuffer.position(0); GLES20.glVertexAttribPointer(mFilterSecondTextureCoordinateAttribute, 2, GLES20.GL_FLOAT, false, 0, mTexture2CoordinatesBuffer); } public void setRotation(final Rotation rotation, final boolean flipHorizontal, final boolean flipVertical) { float[] buffer = TextureRotationUtil.getRotation(rotation, flipHorizontal, flipVertical); ByteBuffer bBuffer = ByteBuffer.allocateDirect(32).order(ByteOrder.nativeOrder()); FloatBuffer fBuffer = bBuffer.asFloatBuffer(); fBuffer.put(buffer); fBuffer.flip(); mTexture2CoordinatesBuffer = bBuffer; } } 

我猜它涉及到用String SUBTRACT_BLEND_GRAGMENT_SHADER和String VERTEX_SHADER改变某些东西。

Answer 1

颜色matrix是将某些像素的新颜色分量值定义为同一像素的当前颜色分量的线性函数的实体。 即颜色matrix转换的唯一input是像素，应该转换颜色。 没有办法让其他像素参与这种转换。 无论它们是来自另一个图像的像素还是变换的像素的邻居，都是不可能的。