| … | |
… | |
| 348 | unsigned int width, unsigned int height) |
348 | unsigned int width, unsigned int height) |
| 349 | { |
349 | { |
| 350 | XImage *ximage; |
350 | XImage *ximage; |
| 351 | char *data, *line; |
351 | char *data, *line; |
| 352 | int bytes_per_pixel; |
352 | int bytes_per_pixel; |
| 353 | int width_r, width_g, width_b; |
353 | int width_r, width_g, width_b, width_a; |
| 354 | int sh_r, sh_g, sh_b; |
354 | int sh_r, sh_g, sh_b, sh_a; |
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355 | uint32_t alpha_mask; |
| 355 | int rowstride; |
356 | int rowstride; |
| 356 | int channels; |
357 | int channels; |
| 357 | unsigned char *row; |
358 | unsigned char *row; |
| 358 | |
359 | |
| 359 | if (visual->c_class != TrueColor) |
360 | if (visual->c_class != TrueColor) |
| 360 | return false; |
361 | return false; |
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362 | |
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363 | #if XRENDER |
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364 | XRenderPictFormat *format = XRenderFindVisualFormat (dpy, visual); |
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365 | if (format) |
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366 | alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha; |
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367 | else |
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368 | #endif |
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369 | alpha_mask = 0; |
| 361 | |
370 | |
| 362 | if (depth == 24 || depth == 32) |
371 | if (depth == 24 || depth == 32) |
| 363 | bytes_per_pixel = 4; |
372 | bytes_per_pixel = 4; |
| 364 | else if (depth == 15 || depth == 16) |
373 | else if (depth == 15 || depth == 16) |
| 365 | bytes_per_pixel = 2; |
374 | bytes_per_pixel = 2; |
| … | |
… | |
| 367 | return false; |
376 | return false; |
| 368 | |
377 | |
| 369 | width_r = ecb_popcount32 (visual->red_mask); |
378 | width_r = ecb_popcount32 (visual->red_mask); |
| 370 | width_g = ecb_popcount32 (visual->green_mask); |
379 | width_g = ecb_popcount32 (visual->green_mask); |
| 371 | width_b = ecb_popcount32 (visual->blue_mask); |
380 | width_b = ecb_popcount32 (visual->blue_mask); |
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381 | width_a = ecb_popcount32 (alpha_mask); |
| 372 | |
382 | |
| 373 | if (width_r > 8 || width_g > 8 || width_b > 8) |
383 | if (width_r > 8 || width_g > 8 || width_b > 8 || width_a > 8) |
| 374 | return false; |
384 | return false; |
| 375 | |
385 | |
| 376 | sh_r = ecb_ctz32 (visual->red_mask); |
386 | sh_r = ecb_ctz32 (visual->red_mask); |
| 377 | sh_g = ecb_ctz32 (visual->green_mask); |
387 | sh_g = ecb_ctz32 (visual->green_mask); |
| 378 | sh_b = ecb_ctz32 (visual->blue_mask); |
388 | sh_b = ecb_ctz32 (visual->blue_mask); |
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389 | sh_a = ecb_ctz32 (alpha_mask); |
| 379 | |
390 | |
| 380 | if (width > INT_MAX / height / bytes_per_pixel) |
391 | if (width > INT_MAX / height / bytes_per_pixel) |
| 381 | return false; |
392 | return false; |
| 382 | |
393 | |
| 383 | data = (char *)malloc (width * height * bytes_per_pixel); |
394 | data = (char *)malloc (width * height * bytes_per_pixel); |
| … | |
… | |
| 397 | rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
408 | rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
| 398 | channels = gdk_pixbuf_get_n_channels (pixbuf); |
409 | channels = gdk_pixbuf_get_n_channels (pixbuf); |
| 399 | row = gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * channels; |
410 | row = gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * channels; |
| 400 | line = data; |
411 | line = data; |
| 401 | |
412 | |
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413 | rgba c (0, 0, 0); |
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414 | |
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415 | if (channels == 4 && alpha_mask == 0) |
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416 | { |
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417 | pix_colors[Color_bg].get (c); |
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418 | c.r >>= 8; |
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419 | c.g >>= 8; |
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420 | c.b >>= 8; |
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421 | } |
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422 | |
| 402 | for (int y = 0; y < height; y++) |
423 | for (int y = 0; y < height; y++) |
| 403 | { |
424 | { |
| 404 | for (int x = 0; x < width; x++) |
425 | for (int x = 0; x < width; x++) |
| 405 | { |
426 | { |
| 406 | unsigned char *pixel = row + x * channels; |
427 | unsigned char *pixel = row + x * channels; |
| 407 | uint32_t value; |
428 | uint32_t value; |
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429 | unsigned char r, g, b, a; |
| 408 | |
430 | |
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431 | if (channels == 4) |
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432 | { |
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433 | a = pixel[3]; |
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434 | r = (pixel[0] * a + c.r * (0xff - a)) / 0xff; |
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435 | g = (pixel[1] * a + c.g * (0xff - a)) / 0xff; |
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436 | b = (pixel[2] * a + c.b * (0xff - a)) / 0xff; |
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437 | } |
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438 | else |
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439 | { |
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440 | a = 0xff; |
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441 | r = pixel[0]; |
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442 | g = pixel[1]; |
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443 | b = pixel[2]; |
|
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444 | } |
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445 | |
| 409 | value = ((pixel[0] >> (8 - width_r)) << sh_r) |
446 | value = ((r >> (8 - width_r)) << sh_r) |
| 410 | | ((pixel[1] >> (8 - width_g)) << sh_g) |
447 | | ((g >> (8 - width_g)) << sh_g) |
| 411 | | ((pixel[2] >> (8 - width_b)) << sh_b); |
448 | | ((b >> (8 - width_b)) << sh_b) |
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449 | | ((a >> (8 - width_a)) << sh_a); |
| 412 | |
450 | |
| 413 | if (bytes_per_pixel == 4) |
451 | if (bytes_per_pixel == 4) |
| 414 | ((uint32_t *)line)[x] = value; |
452 | ((uint32_t *)line)[x] = value; |
| 415 | else |
453 | else |
| 416 | ((uint16_t *)line)[x] = value; |
454 | ((uint16_t *)line)[x] = value; |
