void FCDevice::writeDevicePixels(Document &msg)
{
/*
* Write pixels without mapping, from a JSON integer
* array in msg["pixels"]. The pixel array is removed from
* the reply to save network bandwidth.
*
* Pixel values are clamped to [0, 255], for convenience.
*/
const Value &pixels = msg["pixels"];
if (!pixels.IsArray()) {
msg.AddMember("error", "Pixel array is missing", msg.GetAllocator());
} else {
// Truncate to the framebuffer size, and only deal in whole pixels.
int numPixels = pixels.Size() / 3;
if (numPixels > NUM_PIXELS)
numPixels = NUM_PIXELS;
for (int i = 0; i < numPixels; i++) {
uint8_t *out = fbPixel(i);
const Value &r = pixels[i*3 + 0];
const Value &g = pixels[i*3 + 1];
const Value &b = pixels[i*3 + 2];
out[0] = std::max(0, std::min(255, r.IsInt() ? r.GetInt() : 0));
out[1] = std::max(0, std::min(255, g.IsInt() ? g.GetInt() : 0));
out[2] = std::max(0, std::min(255, b.IsInt() ? b.GetInt() : 0));
}
writeFramebuffer();
}
}
void FCDevice::opcMapPixelColors(const OPCSink::Message &msg, const Value &inst)
{
/*
* Parse one JSON mapping instruction, and copy any relevant parts of 'msg'
* into our framebuffer. This looks for any mapping instructions that we
* recognize:
*
* [ OPC Channel, First OPC Pixel, First output pixel, pixel count ]
*/
unsigned msgPixelCount = msg.length() / 3;
if (inst.IsArray() && inst.Size() == 4) {
// Map a range from an OPC channel to our framebuffer
const Value &vChannel = inst[0u];
const Value &vFirstOPC = inst[1];
const Value &vFirstOut = inst[2];
const Value &vCount = inst[3];
if (vChannel.IsUint() && vFirstOPC.IsUint() && vFirstOut.IsUint() && vCount.IsUint()) {
unsigned channel = vChannel.GetUint();
unsigned firstOPC = vFirstOPC.GetUint();
unsigned firstOut = vFirstOut.GetUint();
unsigned count = vCount.GetUint();
if (channel != msg.channel) {
return;
}
// Clamping, overflow-safe
firstOPC = std::min<unsigned>(firstOPC, msgPixelCount);
firstOut = std::min<unsigned>(firstOut, unsigned(NUM_PIXELS));
count = std::min<unsigned>(count, msgPixelCount - firstOPC);
count = std::min<unsigned>(count, NUM_PIXELS - firstOut);
// Copy pixels
const uint8_t *inPtr = msg.data + (firstOPC * 3);
unsigned outIndex = firstOut;
while (count--) {
uint8_t *outPtr = fbPixel(outIndex++);
outPtr[0] = inPtr[0];
outPtr[1] = inPtr[1];
outPtr[2] = inPtr[2];
inPtr += 3;
}
return;
}
}
// Still haven't found a match?
if (mVerbose) {
std::clog << "Unsupported JSON mapping instruction\n";
}
}
void BitWizardWSDevice::opcMapPixelColors(const OPC::Message &msg, const Value &inst)
{
/*
* Parse one JSON mapping instruction, and copy any relevant parts of 'msg'
* into our framebuffer. This looks for any mapping instructions that we
* recognize:
*
* [ OPC Channel, OPC Pixel, Pixel Color, DMX Channel ]
*/
unsigned msgPixelCount = msg.length() / 3;
if (inst.IsArray() && inst.Size() == 4) {
// Map a range from an OPC channel to our framebuffer
const Value &vChannel = inst[0u];
const Value &vFirstOPC = inst[1];
const Value &vFirstOut = inst[2];
const Value &vCount = inst[3];
if (vChannel.IsUint() && vFirstOPC.IsUint() &&
vFirstOut.IsUint() && vCount.IsUint()) {
unsigned channel = vChannel.GetUint();
unsigned firstOPC = vFirstOPC.GetUint();
unsigned firstOut = vFirstOut.GetUint();
unsigned count = vCount.GetUint();
if (channel != msg.channel) {
return;
}
// Clamping, overflow-safe
firstOPC = std::min<unsigned>(firstOPC, msgPixelCount);
firstOut = std::min<unsigned>(firstOut, unsigned(NUM_PIXELS));
count = std::min<unsigned>(count, msgPixelCount - firstOPC);
count = std::min<unsigned>(count, NUM_PIXELS - firstOut);
// Copy pixels
const uint8_t *inPtr = msg.data + (firstOPC * 3);
unsigned outIndex = firstOut;
//std::cout << "mapping " << count << " pixels at " << firstOut << "...\n";
while (count--) {
uint8_t *outPtr = fbPixel(outIndex++);
outPtr[0] = inPtr[0];
outPtr[1] = inPtr[1];
outPtr[2] = inPtr[2];
inPtr += 3;
if (outIndex >= NUM_PIXELS) return;
}
return;
}
}
if (inst.IsArray() && inst.Size() == 2) {
// Constant value
const Value &vValue = inst[0u];
const Value &vDMXChannel = inst[1];
if (vValue.IsUint() && vDMXChannel.IsUint()) {
unsigned value = vValue.GetUint();
unsigned dmxChannel = vDMXChannel.GetUint();
//setChannel(dmxChannel, value);
return;
}
}
// Still haven't found a match?
if (mVerbose) {
rapidjson::GenericStringBuffer<rapidjson::UTF8<> > buffer;
rapidjson::Writer<rapidjson::GenericStringBuffer<rapidjson::UTF8<> > > writer(buffer);
inst.Accept(writer);
std::clog << "Unsupported JSON mapping instruction: " << buffer.GetString() << "\n";
}
}
