Use default color for selected tab - aerc - mirror of ~rjarry's aerc fork

diff options

author	Drew DeVault <sir@cmpwn.com>	2018-06-07 13:43:17 -0400
committer	Drew DeVault <sir@cmpwn.com>	2018-06-07 13:43:17 -0400
commit	e463c38476b96be99b4ae08af4db9e92da9d2a50 (patch)
tree	61641a07be8e2142b9734b7a0a3c7d648fb3c235 /config
parent	28021ede1bf6b2e2013b9db3fd22c85a3b6099a9 (diff)
download	aerc-e463c38476b96be99b4ae08af4db9e92da9d2a50.tar.gz

Use default color for selected tab

Diffstat (limited to 'config')

0 files changed, 0 insertions, 0 deletions

id='n100' href='#n100'>100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237

const toggleCameraButton = document.getElementById('toggleCamera');
const captureFrameButton = document.getElementById('captureFrame');
const captureVideoButton = document.getElementById('captureVideo');
const video = document.getElementById('webcam');
const canvas = document.getElementById('ditheredOutput');
const context = canvas.getContext('2d');

let stream = null;
let isCameraOn = false;
const lowResWidth = 160; // Gameboy camera resolution: 160×144
const lowResHeight = 144;
const videoLength = 3000; // 3 seconds
video.style.width = lowResWidth + 'px';
video.style.height = lowResHeight + 'px';

// This is a utility function I'm using to try and debut why Safari is claiming that "NotSupportedError: mimeType is not supported"
const getSupportedMimeType = possibleTypes => {
    for (let i = 0; i < possibleTypes.length; i++) {
        if (MediaRecorder.isTypeSupported(possibleTypes[i])) {
            return possibleTypes[i];
        }
    }
    return false;
}
// console.log(getSupportedMimeType(['video/webm;codecs=vp8', 'video/webm', 'video/mp4']));

toggleCameraButton.addEventListener('click', async () => {
    if (!isCameraOn) {
        try {
            let constraints = { video: true };
            if (/Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)) {
                constraints = { 
                    video: {
                        width: { ideal: 1280 },
                        height: { ideal: 720 },
                        facingMode: 'environment' 
                    } 
                };
            }
            stream = await navigator.mediaDevices.getUserMedia(constraints);
            video.srcObject = stream;
            video.style.display = 'block';
            isCameraOn = true;
            toggleCameraButton.textContent = 'Turn Camera Off';
            captureFrameButton.disabled = false;
            captureVideoButton.disabled = false;
            captureFrameButton.classList.add('active');
            captureVideoButton.classList.add('active');
            video.addEventListener('loadeddata', () => {
                canvas.width = lowResWidth;
                canvas.height = lowResHeight;
                requestAnimationFrame(processFrame);
            });
        } catch (err) {
            console.error('Failed to access the camera: ', err);
        }
    } else {
        stream.getTracks().forEach(track => track.stop());
        video.style.display = 'none';
        isCameraOn = false;
        toggleCameraButton.textContent = 'Turn Camera On';
        captureFrameButton.disabled = true;
        captureVideoButton.disabled = true;
        captureFrameButton.classList.remove('active');
        captureVideoButton.classList.remove('active');
    }
});

captureFrameButton.addEventListener('click', () => {
    const link = document.createElement('a');
    link.href = canvas.toDataURL('image/png');
    link.download = 'dithered-frame.png';
    link.click();
});

captureVideoButton.addEventListener('click', () => {
    const startRecording = (canvas, duration, frameRate) => {
        return new Promise((resolve, reject) => {
            const stream = canvas.captureStream(frameRate);
            if (!stream) {
                const errtxt = 'Stream capture from canvas failed.';
                console.error(errtxt);
                return reject(errtxt);
            }

            const mimeType = getSupportedMimeType(['video/webm;codecs=vp8', 'video/webm', 'video/mp4']);
            const mediaRecorder = new MediaRecorder(stream, { mimeType: mimeType });
            let chunks = [];

            mediaRecorder.ondataavailable = (event) => {
                if (event.data.size > 0) {
                    chunks.push(event.data);
                }
            };

            mediaRecorder.onstop = () => {
                const blob = new Blob(chunks, { type: mimeType });
                resolve(blob);
            };

            mediaRecorder.onerror = (event) => {
                console.error('MediaRecorder error:', event.error);
                reject(event.error);
            };

            // Set the frame rate
            mediaRecorder.onstart = () => {
                const options = mediaRecorder.videoBitsPerSecond;
                mediaRecorder.videoBitsPerSecond = options * frameRate;
            };

            mediaRecorder.start();
            captureVideoButton.disabled = true;
            captureVideoButton.textContent = 'Recording...';
            setTimeout(() => {
                mediaRecorder.stop();
                captureVideoButton.disabled = false;
                captureVideoButton.textContent = 'Capture Video';
            }, duration);
        });
    };

    const handleCaptureVideo = async () => {
        if (!isCameraOn) {
            console.error('Camera is not active.');
            return;
        }

        try {
            captureVideoButton.disabled = true;
            const frameRate = 10; // Frame rate
            const videoBlob = await startRecording(ditheredOutput, videoLength, frameRate);
            const videoURL = URL.createObjectURL(videoBlob);

            const videoLink = document.createElement('a');
            videoLink.href = videoURL;
            if (videoBlob.type === 'video/mp4') {
                videoLink.download = 'dithered-video.mp4';
            } else {
                videoLink.download = 'dithered-video.webm';
            }
            videoLink.click();

            // Enable the button again after recording
            captureVideoButton.disabled = false;
        } catch (error) {
            console.error('Error recording video:', error);
            captureVideoButton.disabled = false;
        }
    };

    handleCaptureVideo();
});


function processFrame() {
    if (!isCameraOn) {
        console.error('Camera is not active.');
        return;
    }

    // Crop and draw the middle part of the video frame
    const videoAspect = video.videoWidth / video.videoHeight;
    const canvasAspect = lowResWidth / lowResHeight;
    let sx, sy, sw, sh;
    if (videoAspect > canvasAspect) {
        sw = video.videoHeight * canvasAspect;
        sh = video.videoHeight;
        sx = (video.videoWidth - sw) / 2;
        sy = 0;
    } else {
        sw = video.videoWidth;
        sh = video.videoWidth / canvasAspect;
        sx = 0;
        sy = (video.videoHeight - sh) / 2;
    }
    context.drawImage(video, sx, sy, sw, sh, 0, 0, lowResWidth, lowResHeight);
    const frame = context.getImageData(0, 0, lowResWidth, lowResHeight);
    applyFloydSteinbergDithering(frame);
    context.putImageData(frame, 0, 0);
    requestAnimationFrame(processFrame);
}

function applyFloydSteinbergDithering(imageData) {
    const { data, width, height } = imageData;

    // Helper to access and set pixel values
    const getPixelIndex = (x, y) => (y * width + x) * 4;
    const getPixelValue = (x, y) => data[getPixelIndex(x, y)];
    const setPixelValue = (x, y, value) => {
        const index = getPixelIndex(x, y);
        data[index] = value;
        data[index + 1] = value;
        data[index + 2] = value;
    };

    // Helper that clamps a value between 0 and 255
    const clamp = (value) => Math.max(0, Math.min(255, value));

    // Process a single pixel
    const processPixel = (x, y) => {
        const oldPixel = getPixelValue(x, y);
        const newPixel = oldPixel < 128 ? 0 : 255; // Make it 1-bit black and white
        setPixelValue(x, y, newPixel);
        const quantError = oldPixel - newPixel;

        // Spread the error to neighboring pixels
        if (x + 1 < width) {
            const idx = getPixelIndex(x + 1, y);
            data[idx] = clamp(data[idx] + quantError * 7 / 16);
        }
        if (x - 1 >= 0 && y + 1 < height) {
            const idx = getPixelIndex(x - 1, y + 1);
            data[idx] = clamp(data[idx] + quantError * 3 / 16);
        }
        if (y + 1 < height) {
            const idx = getPixelIndex(x, y + 1);
            data[idx] = clamp(data[idx] + quantError * 5 / 16);
        }
        if (x + 1 < width && y + 1 < height) {
            const idx = getPixelIndex(x + 1, y + 1);
            data[idx] = clamp(data[idx] + quantError * 1 / 16);
        }
    };

    // Process each pixel in the image one by one
    // FIXME: There has to be a better way to do this, right?
    for (let y = 0; y < height; y++) {
        for (let x = 0; x < width; x++) {
            processPixel(x, y);
        }
    }
}

function clamp(value) {
    return Math.max(0, Math.min(255, value));
}


context:
space:
mode: