gfx/cairo/libpixman/src/pixman-combine16.c@6474c204b198 (annotated)
gfx/cairo/libpixman/src/pixman-combine16.c
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | #ifdef HAVE_CONFIG_H |
| michael@0 | 2 | #include <config.h> |
| michael@0 | 3 | #endif |
| michael@0 | 4 | |
| michael@0 | 5 | #include <math.h> |
| michael@0 | 6 | #include <string.h> |
| michael@0 | 7 | |
| michael@0 | 8 | #include "pixman-private.h" |
| michael@0 | 9 | |
| michael@0 | 10 | #include "pixman-combine32.h" |
| michael@0 | 11 | |
| michael@0 | 12 | static force_inline uint32_t |
| michael@0 | 13 | combine_mask (const uint32_t src, const uint32_t mask) |
| michael@0 | 14 | { |
| michael@0 | 15 | uint32_t s, m; |
| michael@0 | 16 | |
| michael@0 | 17 | m = mask >> A_SHIFT; |
| michael@0 | 18 | |
| michael@0 | 19 | if (!m) |
| michael@0 | 20 | return 0; |
| michael@0 | 21 | s = src; |
| michael@0 | 22 | |
| michael@0 | 23 | UN8x4_MUL_UN8 (s, m); |
| michael@0 | 24 | |
| michael@0 | 25 | return s; |
| michael@0 | 26 | } |
| michael@0 | 27 | |
| michael@0 | 28 | static void |
| michael@0 | 29 | combine_src_u (pixman_implementation_t *imp, |
| michael@0 | 30 | pixman_op_t op, |
| michael@0 | 31 | uint32_t * dest, |
| michael@0 | 32 | const uint32_t * src, |
| michael@0 | 33 | const uint32_t * mask, |
| michael@0 | 34 | int width) |
| michael@0 | 35 | { |
| michael@0 | 36 | int i; |
| michael@0 | 37 | |
| michael@0 | 38 | if (!mask) |
| michael@0 | 39 | memcpy (dest, src, width * sizeof (uint16_t)); |
| michael@0 | 40 | else |
| michael@0 | 41 | { |
| michael@0 | 42 | uint16_t *d = (uint16_t*)dest; |
| michael@0 | 43 | uint16_t *src16 = (uint16_t*)src; |
| michael@0 | 44 | for (i = 0; i < width; ++i) |
| michael@0 | 45 | { |
| michael@0 | 46 | if ((*mask & 0xff000000) == 0xff000000) { |
| michael@0 | 47 | // it's likely worth special casing |
| michael@0 | 48 | // fully opaque because it avoids |
| michael@0 | 49 | // the cost of conversion as well the multiplication |
| michael@0 | 50 | *(d + i) = *src16; |
| michael@0 | 51 | } else { |
| michael@0 | 52 | // the mask is still 32bits |
| michael@0 | 53 | uint32_t s = combine_mask (convert_0565_to_8888(*src16), *mask); |
| michael@0 | 54 | *(d + i) = convert_8888_to_0565(s); |
| michael@0 | 55 | } |
| michael@0 | 56 | mask++; |
| michael@0 | 57 | src16++; |
| michael@0 | 58 | } |
| michael@0 | 59 | } |
| michael@0 | 60 | |
| michael@0 | 61 | } |
| michael@0 | 62 | |
| michael@0 | 63 | static void |
| michael@0 | 64 | combine_over_u (pixman_implementation_t *imp, |
| michael@0 | 65 | pixman_op_t op, |
| michael@0 | 66 | uint32_t * dest, |
| michael@0 | 67 | const uint32_t * src, |
| michael@0 | 68 | const uint32_t * mask, |
| michael@0 | 69 | int width) |
| michael@0 | 70 | { |
| michael@0 | 71 | int i; |
| michael@0 | 72 | |
| michael@0 | 73 | if (!mask) |
| michael@0 | 74 | memcpy (dest, src, width * sizeof (uint16_t)); |
| michael@0 | 75 | else |
| michael@0 | 76 | { |
| michael@0 | 77 | uint16_t *d = (uint16_t*)dest; |
| michael@0 | 78 | uint16_t *src16 = (uint16_t*)src; |
| michael@0 | 79 | for (i = 0; i < width; ++i) |
| michael@0 | 80 | { |
| michael@0 | 81 | if ((*mask & 0xff000000) == 0xff000000) { |
| michael@0 | 82 | // it's likely worth special casing |
| michael@0 | 83 | // fully opaque because it avoids |
| michael@0 | 84 | // the cost of conversion as well the multiplication |
| michael@0 | 85 | *(d + i) = *src16; |
| michael@0 | 86 | } else if ((*mask & 0xff000000) == 0x00000000) { |
| michael@0 | 87 | // keep the dest the same |
| michael@0 | 88 | } else { |
| michael@0 | 89 | // the mask is still 32bits |
| michael@0 | 90 | uint32_t s = combine_mask (convert_0565_to_8888(*src16), *mask); |
| michael@0 | 91 | uint32_t ia = ALPHA_8 (~s); |
| michael@0 | 92 | uint32_t d32 = convert_0565_to_8888(*(d + i)); |
| michael@0 | 93 | UN8x4_MUL_UN8_ADD_UN8x4 (d32, ia, s); |
| michael@0 | 94 | *(d + i) = convert_8888_to_0565(d32); |
| michael@0 | 95 | } |
| michael@0 | 96 | mask++; |
| michael@0 | 97 | src16++; |
| michael@0 | 98 | } |
| michael@0 | 99 | } |
| michael@0 | 100 | |
| michael@0 | 101 | } |
| michael@0 | 102 | |
| michael@0 | 103 | |
| michael@0 | 104 | void |
| michael@0 | 105 | _pixman_setup_combiner_functions_16 (pixman_implementation_t *imp) |
| michael@0 | 106 | { |
| michael@0 | 107 | int i; |
| michael@0 | 108 | for (i = 0; i < PIXMAN_N_OPERATORS; i++) { |
| michael@0 | 109 | imp->combine_16[i] = NULL; |
| michael@0 | 110 | } |
| michael@0 | 111 | imp->combine_16[PIXMAN_OP_SRC] = combine_src_u; |
| michael@0 | 112 | imp->combine_16[PIXMAN_OP_OVER] = combine_over_u; |
| michael@0 | 113 | } |
| michael@0 | 114 |
