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libvips
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seems to work 

still needs tests for gm overlap mode
This commit is contained in:
John Cupitt 2016-09-07 10:12:04 +01:00
parent 6a8295cc50
commit 7e535f6c42
2 changed files with 14 additions and 4 deletions
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1
ChangeLog
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@ -41,6 +41,7 @@
- added VIPS_ROUND as well as VIPS_RINT
- resize/reduce*/shrink*/affine now round output size to nearest rather than
rounding down, thanks ioquatix
- better overlap support for google maps in dzsave
19/8/16 started 8.3.4
- better transparency handling in gifload, thanks diegocsandrim

17
libvips/foreign/dzsave.c
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@ -690,6 +690,8 @@ pyramid_build( VipsForeignSaveDz *dz, Layer *above,
VipsForeignSave *save = VIPS_FOREIGN_SAVE( dz );
Layer *layer = VIPS_NEW( dz, Layer );
int right;
int bottom;
VipsRect strip;
int limit;
@ -697,10 +699,17 @@ pyramid_build( VipsForeignSaveDz *dz, Layer *above,
layer->width = width;
layer->height = height;
layer->tiles_across = VIPS_ROUND_UP( width, dz->tile_step ) /
dz->tile_step;
layer->tiles_down = VIPS_ROUND_UP( height, dz->tile_step ) /
dz->tile_step;
/* The 0 position of the right-most possible tile.
*/
right = VIPS_MAX( 0, width - dz->tile_margin - dz->tile_size );
/* Tiles from that to the left edge will be spaced by tile step. The +1
* is the tile we subtracted above.
*/
layer->tiles_across = ceil( (double) right / dz->tile_step ) + 1;
bottom = VIPS_MAX( 0, height - dz->tile_margin - dz->tile_size );
layer->tiles_down = ceil( (double) bottom / dz->tile_step ) + 1;
layer->real_pixels = *real_pixels;