Differential D25876 Diff 72819 framebuffers/xcb/xcb_framebuffer.cpp

Changeset View

Standalone View

View Options

framebuffers/xcb/xcb_framebuffer.cpp

Show First 20 Lines • Show All 375 Lines • ▼ Show 20 Line(s)348void XCBFrameBuffer::getServerFormat(rfbPixelFormat &format) {
376 format.bitsPerPixel = d->framebufferImage->bpp; 376​ format.bitsPerPixel = d->framebufferImage->bpp;
377 format.depth = d->framebufferImage->depth; 377​ format.depth = d->framebufferImage->depth;
378 format.trueColour = true; // not using color palettes 378​ format.trueColour = true; // not using color palettes
379 format.bigEndian = false; // always false for ZPIXMAP format! 379​ format.bigEndian = false; // always false for ZPIXMAP format!
380 380​
381 // information about pixels layout 381​ // information about pixels layout
382 382​
383 if (root_visualtype) { 383​ if (root_visualtype) {
384 uint16_t pixelmaxValue = (1 << root_visualtype->bits_per_rgb_value) - 1; ​
385 ​
386#ifdef _DEBUG 384​#ifdef _DEBUG
387 qDebug("xcb framebuffer: Got info about root visual:\n" 385​ qDebug("xcb framebuffer: Got info about root visual:\n"
388 " bits per rgb value: %d\n" 386​ " bits per rgb value: %d\n"
389 " red mask: %08x\n" 387​ " red mask: %08x\n"
390 " green mask: %08x\n" 388​ " green mask: %08x\n"
391 " blue mask: %08x\n" 389​ " blue mask: %08x\n",
392 " pixelMaxValue = %d\n", ​
393 (int)root_visualtype->bits_per_rgb_value, 390​ (int)root_visualtype->bits_per_rgb_value,
394 root_visualtype->red_mask, 391​ root_visualtype->red_mask,
395 root_visualtype->green_mask, 392​ root_visualtype->green_mask,
396 root_visualtype->blue_mask, 393​ root_visualtype->blue_mask);
397 (int)pixelmaxValue); ​
398#endif 394​#endif
399 395​
400 // calculate shifts 396​ // calculate shifts
401 format.redShift = 0; 397​ format.redShift = 0;
402 format.redMax = pixelmaxValue; ​
403 if (root_visualtype->red_mask) { 398​ if (root_visualtype->red_mask) {
404 while (!(root_visualtype->red_mask & (1 << format.redShift))) { 399​ while (!(root_visualtype->red_mask & (1 << format.redShift))) {
405 format.redShift++; 400​ format.redShift++;
406 } 401​ }
407 } 402​ }
408 format.greenShift = 0; 403​ format.greenShift = 0;
409 format.greenMax = pixelmaxValue; ​
410 if (root_visualtype->green_mask) { 404​ if (root_visualtype->green_mask) {
411 while (!(root_visualtype->green_mask & (1 << format.greenShift))) { 405​ while (!(root_visualtype->green_mask & (1 << format.greenShift))) {
412 format.greenShift++; 406​ format.greenShift++;
413 } 407​ }
414 } 408​ }
415 format.blueShift = 0; 409​ format.blueShift = 0;
416 format.blueMax = pixelmaxValue; ​
417 if (root_visualtype->blue_mask) { 410​ if (root_visualtype->blue_mask) {
418 while (!(root_visualtype->blue_mask & (1 << format.blueShift))) { 411​ while (!(root_visualtype->blue_mask & (1 << format.blueShift))) {
419 format.blueShift++; 412​ format.blueShift++;
420 } 413​ }
421 } 414​ }
422 415​
416​ // calculate pixel max value.
417​ // NOTE: bits_per_rgb_value is unreliable, thus should be avoided.
418​ format.redMax = root_visualtype->red_mask >> format.redShift;
419​ format.greenMax = root_visualtype->green_mask >> format.greenShift;
420​ format.blueMax = root_visualtype->blue_mask >> format.blueShift;
421​
423#ifdef _DEBUG 422​#ifdef _DEBUG
424 qDebug() << " Calculated redShift =" << (int)format.redShift; 423​ qDebug() << " Calculated redShift =" << (int)format.redShift;
425 qDebug() << " Calculated greenShift =" << (int)format.greenShift; 424​ qDebug() << " Calculated greenShift =" << (int)format.greenShift;
426 qDebug() << " Calculated blueShift =" << (int)format.blueShift; 425​ qDebug() << " Calculated blueShift =" << (int)format.blueShift;
426​ qDebug( " Calculated max values: R%d G%d B%d",
427​ format.redMax, format.greenMax, format.blueMax);
427#endif 428​#endif
428 } else { 429​ } else {
429 // some kind of fallback (unlikely code execution will go this way) 430​ // some kind of fallback (unlikely code execution will go this way)
430 // idea taken from qt framefuffer sources 431​ // idea taken from qt framefuffer sources
431 if (format.bitsPerPixel == 8) { 432​ if (format.bitsPerPixel == 8) {
432 format.redShift = 0; 433​ format.redShift = 0;
433 format.greenShift = 3; 434​ format.greenShift = 3;
434 format.blueShift = 6; 435​ format.blueShift = 6;
▲ Show 20 Lines • Show All 250 Lines • Show Last 20 Lines