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… | |
| 329 | XFreePixmap (dpy, pixmap); |
329 | XFreePixmap (dpy, pixmap); |
| 330 | |
330 | |
| 331 | return mask; |
331 | return mask; |
| 332 | } |
332 | } |
| 333 | |
333 | |
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334 | static void |
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335 | extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc) |
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336 | { |
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337 | int32_t x = clamp (c, cl0, cl1); |
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338 | c -= x; |
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339 | xc = x; |
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340 | } |
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341 | |
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342 | static bool |
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343 | extract (int32_t cl0, int32_t cl1, int32_t &r, int32_t &g, int32_t &b, int32_t &a, unsigned short &xr, unsigned short &xg, unsigned short &xb, unsigned short &xa) |
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344 | { |
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345 | extract (cl0, cl1, r, xr); |
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346 | extract (cl0, cl1, g, xg); |
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347 | extract (cl0, cl1, b, xb); |
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348 | extract (cl0, cl1, a, xa); |
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349 | |
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350 | return xr | xg | xb | xa; |
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351 | } |
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352 | |
| 334 | void |
353 | void |
| 335 | rxvt_img::brightness (uint16_t r, uint16_t g, uint16_t b, uint16_t a) |
354 | rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a) |
| 336 | { |
355 | { |
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356 | unshare (); |
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357 | |
| 337 | Display *dpy = s->display->dpy; |
358 | Display *dpy = s->display->dpy; |
| 338 | Picture src = create_xrender_mask (dpy, pm, True); |
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| 339 | Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
359 | Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
| 340 | |
360 | |
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361 | // loop should not be needed for brightness, as only -1..1 makes sense |
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362 | //while (r | g | b | a) |
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363 | { |
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364 | unsigned short xr, xg, xb, xa; |
| 341 | XRenderColor mask_c; |
365 | XRenderColor mask_c; |
| 342 | mask_c.red = r; |
366 | |
| 343 | mask_c.green = g; |
367 | if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) |
| 344 | mask_c.blue = b; |
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| 345 | mask_c.alpha = a; |
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| 346 | XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); |
368 | XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h); |
| 347 | |
369 | |
| 348 | XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); |
370 | if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) |
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371 | { |
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372 | XRenderColor mask_w = { 65535, 65535, 65535, 65535 }; |
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373 | XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h); |
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374 | mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing |
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375 | mask_c.green = -mask_c.green; |
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376 | mask_c.blue = -mask_c.blue; |
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377 | mask_c.alpha = -mask_c.alpha; |
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378 | XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h); |
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379 | XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h); |
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380 | } |
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381 | } |
| 349 | |
382 | |
| 350 | XRenderFreePicture (dpy, src); |
383 | |
| 351 | XRenderFreePicture (dpy, dst); |
384 | XRenderFreePicture (dpy, dst); |
| 352 | } |
385 | } |
| 353 | |
386 | |
| 354 | void |
387 | void |
| 355 | rxvt_img::contrast (uint16_t r, uint16_t g, uint16_t b, uint16_t a) |
388 | rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a) |
| 356 | { |
389 | { |
| 357 | if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL)) |
390 | if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL)) |
| 358 | { |
391 | { |
| 359 | rxvt_warn ("rxvt_img::contrast operation not supported on this display, RENDER extension too old.\n"); |
392 | rxvt_warn ("rxvt_img::contrast operation not supported on this display, RENDER extension too old.\n"); |
| 360 | return; |
393 | return; |
| 361 | } |
394 | } |
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395 | |
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396 | unshare (); |
| 362 | |
397 | |
| 363 | Display *dpy = s->display->dpy; |
398 | Display *dpy = s->display->dpy; |
| 364 | Picture src = create_xrender_mask (dpy, pm, True); |
399 | Picture src = create_xrender_mask (dpy, pm, True); |
| 365 | Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
400 | Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); |
| 366 | |
401 | |
