diff options
Diffstat (limited to 'pixman/pixman/pixman-gradient-walker.c')
| -rw-r--r-- | pixman/pixman/pixman-gradient-walker.c | 175 |
1 files changed, 43 insertions, 132 deletions
diff --git a/pixman/pixman/pixman-gradient-walker.c b/pixman/pixman/pixman-gradient-walker.c index dd666b412..048039e89 100644 --- a/pixman/pixman/pixman-gradient-walker.c +++ b/pixman/pixman/pixman-gradient-walker.c @@ -31,7 +31,7 @@ void _pixman_gradient_walker_init (pixman_gradient_walker_t *walker, gradient_t * gradient, - unsigned int spread) + pixman_repeat_t repeat) { walker->num_stops = gradient->n_stops; walker->stops = gradient->stops; @@ -42,112 +42,54 @@ _pixman_gradient_walker_init (pixman_gradient_walker_t *walker, walker->left_rb = 0; walker->right_ag = 0; walker->right_rb = 0; - walker->spread = spread; + walker->repeat = repeat; walker->need_reset = TRUE; } -void -_pixman_gradient_walker_reset (pixman_gradient_walker_t *walker, - pixman_fixed_32_32_t pos) +static void +gradient_walker_reset (pixman_gradient_walker_t *walker, + pixman_fixed_48_16_t pos) { int32_t x, left_x, right_x; - pixman_color_t *left_c, *right_c; + pixman_color_t *left_c, *right_c; int n, count = walker->num_stops; - pixman_gradient_stop_t * stops = walker->stops; - - static const pixman_color_t transparent_black = { 0, 0, 0, 0 }; + pixman_gradient_stop_t *stops = walker->stops; - switch (walker->spread) + if (walker->repeat == PIXMAN_REPEAT_NORMAL) { - case PIXMAN_REPEAT_NORMAL: - x = (int32_t)pos & 0xFFFF; - for (n = 0; n < count; n++) - if (x < stops[n].x) - break; - if (n == 0) - { - left_x = stops[count - 1].x - 0x10000; - left_c = &stops[count - 1].color; - } - else - { - left_x = stops[n - 1].x; - left_c = &stops[n - 1].color; - } - - if (n == count) - { - right_x = stops[0].x + 0x10000; - right_c = &stops[0].color; - } - else - { - right_x = stops[n].x; - right_c = &stops[n].color; - } - left_x += (pos - x); - right_x += (pos - x); - break; - - case PIXMAN_REPEAT_PAD: - for (n = 0; n < count; n++) - if (pos < stops[n].x) - break; - - if (n == 0) - { - left_x = INT32_MIN; - left_c = &stops[0].color; - } - else - { - left_x = stops[n - 1].x; - left_c = &stops[n - 1].color; - } - - if (n == count) - { - right_x = INT32_MAX; - right_c = &stops[n - 1].color; - } - else - { - right_x = stops[n].x; - right_c = &stops[n].color; - } - break; - - case PIXMAN_REPEAT_REFLECT: - x = (int32_t)pos & 0xFFFF; + x = (int32_t)pos & 0xffff; + } + else if (walker->repeat == PIXMAN_REPEAT_REFLECT) + { + x = (int32_t)pos & 0xffff; if ((int32_t)pos & 0x10000) x = 0x10000 - x; - for (n = 0; n < count; n++) - if (x < stops[n].x) - break; - - if (n == 0) - { - left_x = -stops[0].x; - left_c = &stops[0].color; - } - else - { - left_x = stops[n - 1].x; - left_c = &stops[n - 1].color; - } - - if (n == count) - { - right_x = 0x20000 - stops[n - 1].x; - right_c = &stops[n - 1].color; - } - else - { - right_x = stops[n].x; - right_c = &stops[n].color; - } - + } + else + { + x = pos; + } + + for (n = 0; n < count; n++) + { + if (x < stops[n].x) + break; + } + + left_x = stops[n - 1].x; + left_c = &stops[n - 1].color; + + right_x = stops[n].x; + right_c = &stops[n].color; + + if (walker->repeat == PIXMAN_REPEAT_NORMAL) + { + left_x += (pos - x); + right_x += (pos - x); + } + else if (walker->repeat == PIXMAN_REPEAT_REFLECT) + { if ((int32_t)pos & 0x10000) { pixman_color_t *tmp_c; @@ -165,32 +107,6 @@ _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker, } left_x += (pos - x); right_x += (pos - x); - break; - - default: /* REPEAT_NONE */ - for (n = 0; n < count; n++) - if (pos < stops[n].x) - break; - - if (n == 0) - { - left_x = INT32_MIN; - right_x = stops[0].x; - left_c = right_c = (pixman_color_t*) &transparent_black; - } - else if (n == count) - { - left_x = stops[n - 1].x; - right_x = INT32_MAX; - left_c = right_c = (pixman_color_t*) &transparent_black; - } - else - { - left_x = stops[n - 1].x; - right_x = stops[n].x; - left_c = &stops[n - 1].color; - right_c = &stops[n].color; - } } walker->left_x = left_x; @@ -201,8 +117,8 @@ _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker, walker->right_rb = ((right_c->red & 0xff00) << 8) | (right_c->blue >> 8); if (walker->left_x == walker->right_x || - ( walker->left_ag == walker->right_ag && - walker->left_rb == walker->right_rb ) ) + (walker->left_ag == walker->right_ag && + walker->left_rb == walker->right_rb)) { walker->stepper = 0; } @@ -215,20 +131,15 @@ _pixman_gradient_walker_reset (pixman_gradient_walker_t *walker, walker->need_reset = FALSE; } -#define PIXMAN_GRADIENT_WALKER_NEED_RESET(w, x) \ - ( (w)->need_reset || (x) < (w)->left_x || (x) >= (w)->right_x) - - -/* the following assumes that PIXMAN_GRADIENT_WALKER_NEED_RESET(w,x) is FALSE */ uint32_t _pixman_gradient_walker_pixel (pixman_gradient_walker_t *walker, - pixman_fixed_32_32_t x) + pixman_fixed_48_16_t x) { int dist, idist; uint32_t t1, t2, a, color; - if (PIXMAN_GRADIENT_WALKER_NEED_RESET (walker, x)) - _pixman_gradient_walker_reset (walker, x); + if (walker->need_reset || x < walker->left_x || x >= walker->right_x) + gradient_walker_reset (walker, x); dist = ((int)(x - walker->left_x) * walker->stepper) >> 16; idist = 256 - dist; |