isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-11-26 01:50:42 -05:00
Code Issues Packages Projects Releases Wiki Activity

spans: Represent spans with floating point precision

Browse Source 
Instead of using integers to represent spans we now use floats instead.
This means we are no longer forced to iterate using non-normalized
coordinates so we should hopefully be able to avoid numerous redundant
unnormalize/normalize steps when using the spans api.

Reviewed-by: Neil Roberts <neil@linux.intel.com>
This commit is contained in:
Robert Bragg 2011-10-23 20:20:49 +01:00
parent c7098e417d
commit c11036cd13
3 changed files with 10 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
cogl/cogl-spans.c
View File

@ -38,8 +38,7 @@ _cogl_span_iter_update (CoglSpanIter *iter)
iter->span = &g_array_index (iter->array, CoglSpan, iter->index);
/* Offset next position by span size */
iter->next_pos = iter->pos +
(float)(iter->span->size - iter->span->waste);
iter->next_pos = iter->pos + iter->span->size - iter->span->waste;
/* Check if span intersects the area to cover */
if (iter->next_pos <= iter->cover_start ||

6
cogl/cogl-spans.h
View File

@ -28,9 +28,9 @@
typedef struct _CoglSpan
{
int start;
int size;
int waste;
float start;
float size;
float waste;
} CoglSpan;
typedef struct _CoglSpanIter

12
cogl/cogl-texture-2d-sliced.c
View File

@ -246,8 +246,8 @@ _cogl_texture_2d_sliced_set_waste (CoglTexture2DSliced *tex_2ds,
{
src = (bmp_data + ((src_y + (int) y_iter->intersect_start - dst_y) *
bmp_rowstride) +
(src_x + x_span->start + x_span->size -
x_span->waste - dst_x - 1) * bpp);
(src_x + (int)x_span->start + (int)x_span->size -
(int)x_span->waste - dst_x - 1) * bpp);
dst = waste_buf;
@ -295,8 +295,8 @@ _cogl_texture_2d_sliced_set_waste (CoglTexture2DSliced *tex_2ds,
src = (bmp_data + ((src_x + (int) x_iter->intersect_start - dst_x) *
bpp) +
(src_y + y_span->start + y_span->size - y_span->waste
- dst_y - 1) * bmp_rowstride);
(src_y + (int)y_span->start + (int)y_span->size -
(int)y_span->waste - dst_y - 1) * bmp_rowstride);
dst = waste_buf;
@ -790,8 +790,8 @@ _cogl_texture_2d_sliced_slices_create (CoglContext *ctx,
COGL_NOTE (SLICING, "CREATE SLICE (%d,%d)\tsize (%d,%d)",
x, y,
x_span->size - x_span->waste,
y_span->size - y_span->waste);
(int)(x_span->size - x_span->waste),
(int)(y_span->size - y_span->waste));
slice_textures[y * n_x_slices + x] =
cogl_texture_2d_new_with_size (ctx, x_span->size, y_span->size,