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damage-refinery: Use negative stride to handle y-inversion

pull/55/head
Andri Yngvason 2020-06-21 19:34:49 +00:00
parent c515a29951
commit 439d3997d4
1 changed files with 8 additions and 15 deletions
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23
src/damage-refinery.c
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@ -10,7 +10,7 @@
#include "util.h"
#include "murmurhash.h"
#define HASH_SEED 0xdeadbeef
#define HASH_SEED 0
int damage_refinery_init(struct damage_refinery* self, uint32_t width,
uint32_t height)
@ -41,6 +41,11 @@ static size_t damage_copy_tile(struct damage_refinery* self, void* tile_buffer,
uint32_t* pixels = buffer->pixels;
int pixel_stride = buffer->stride / 4;
if (buffer->y_inverted) {
pixels += (buffer->height - 1) * pixel_stride;
pixel_stride *= -1;
}
size_t i = 0;
int x_start = tx * 32;
int x_stop = MIN(((int)tx + 1) * 32, buffer->width);
@ -61,19 +66,6 @@ static uint32_t* damage_tile_hash_ptr(struct damage_refinery* self,
return &self->hashes[tx + ty * twidth];
}
static void damage_tile(struct damage_refinery* self,
struct pixman_region16* refined, uint32_t tx, uint32_t ty,
int invert_y)
{
uint32_t theight = UDIV_UP(self->height, 32);
if (invert_y)
pixman_region_union_rect(refined, refined, tx * 32,
(theight - ty - 1) * 32, 32, 32);
else
pixman_region_union_rect(refined, refined,
tx * 32, ty * 32, 32, 32);
}
static void damage_refine_tile(struct damage_refinery* self,
struct pixman_region16* refined, uint32_t tx, uint32_t ty,
const struct wv_buffer* buffer)
@ -86,7 +78,8 @@ static void damage_refine_tile(struct damage_refinery* self,
*old_hash_ptr = hash;
if (is_damaged)
damage_tile(self, refined, tx, ty, buffer->y_inverted);
pixman_region_union_rect(refined, refined, tx * 32, ty * 32, 32,
32);
}
void damage_refine(struct damage_refinery* self,