缩放和平移GPUImageView（安卓）

Question

我希望GPUimageView能够支持双指缩放和触摸移动。我在Image effects with rotation and pinch to zoom using GLSurfaceView Android中找到了例子。

所以，在GPUImageRenderer中进行编辑。

private void adjustImageScaling() {
        float outputWidth = mOutputWidth;
        float outputHeight = mOutputHeight;
        if (mRotation == Rotation.ROTATION_270 || mRotation == Rotation.ROTATION_90) {
            outputWidth = mOutputHeight;
            outputHeight = mOutputWidth;
        }

        float ratio1 = outputWidth / mImageWidth;
        float ratio2 = outputHeight / mImageHeight;
        float ratioMax = Math.max(ratio1, ratio2);
        int imageWidthNew = Math.round(mImageWidth * ratioMax);
        int imageHeightNew = Math.round(mImageHeight * ratioMax);

        float ratioWidth = imageWidthNew / outputWidth;
        float ratioHeight = imageHeightNew / outputHeight;

        float[] cube = CUBE;
        float[] textureCords = TextureRotationUtil.getRotation(mRotation, mFlipHorizontal, mFlipVertical);
        if (mScaleType == GPUImage.ScaleType.CENTER_CROP) {
            float distHorizontal = (1 - 1 / ratioWidth) / 2;
            float distVertical = (1 - 1 / ratioHeight) / 2;
            textureCords = new float[]{
                    addDistance(textureCords[0], distHorizontal), addDistance(textureCords[1], distVertical),
                    addDistance(textureCords[2], distHorizontal), addDistance(textureCords[3], distVertical),
                    addDistance(textureCords[4], distHorizontal), addDistance(textureCords[5], distVertical),
                    addDistance(textureCords[6], distHorizontal), addDistance(textureCords[7], distVertical),
            };
        } else {
            cube = new float[]{
                    CUBE[0] / ratioHeight, CUBE[1] / ratioWidth,
                    CUBE[2] / ratioHeight, CUBE[3] / ratioWidth,
                    CUBE[4] / ratioHeight, CUBE[5] / ratioWidth,
                    CUBE[6] / ratioHeight, CUBE[7] / ratioWidth,
            };
        }
    for (int i = 0; i < 8; i++) {
                cube [i] *= mZoom;
            }
        mGLCubeBuffer.clear();
        mGLCubeBuffer.put(cube).position(0);
        mGLTextureBuffer.clear();
        mGLTextureBuffer.put(textureCords).position(0);
    }

我添加了代码：

for (int i = 0; i < 8; i++) {
                cude[i] *= mZoom;
            }

在glCubeBuffer.clear()上方但不起作用。请帮我正确实现。谢谢。

编辑：问题已解决： 将setRendermode从dirty更改为setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY)即可正常工作。

- Duc Nguyen

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我也遇到了同样的问题。你能帮我解决一下吗？对我来说，GLSurfaceView.RENDERMODE_CONTINUOUSLY也不起作用。 - Adarsh Sharma

Answer 1

将setRendermode从dirty改为setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY); 然后它就可以工作了

- Duc Nguyen