isa/mutter
1
0
Fork 0
mirror of https://github.com/brl/mutter.git synced 2024-12-25 20:32:16 +00:00
Code Issues Packages Projects Releases Wiki Activity

texture-tower: Use graphene APIs

Browse Source 
A boring one, with the exception that row and column needed to be
swapped. For the sake of consistency, the variable names were also
synchronized with the values they hold, so e.g. xy → yx, etc.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1439
This commit is contained in:
Georges Basile Stavracas Neto 2020-09-11 19:40:00 -03:00
parent f6998f87c2
commit a3cb1cabd3
1 changed files with 21 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
src/compositor/meta-texture-tower.c
View File

@ -281,17 +281,17 @@ get_paint_level (ClutterPaintContext *paint_context,
cogl_framebuffer_get_projection_matrix (framebuffer, &projection);
cogl_framebuffer_get_modelview_matrix (framebuffer, &modelview);
cogl_matrix_multiply (&pm, &projection, &modelview);
graphene_matrix_multiply (&modelview, &projection, &pm);
xx = cogl_matrix_get_value (&pm, 0, 0);
xy = cogl_matrix_get_value (&pm, 0, 1);
xw = cogl_matrix_get_value (&pm, 0, 3);
yx = cogl_matrix_get_value (&pm, 1, 0);
yy = cogl_matrix_get_value (&pm, 1, 1);
yw = cogl_matrix_get_value (&pm, 1, 3);
wx = cogl_matrix_get_value (&pm, 3, 0);
wy = cogl_matrix_get_value (&pm, 3, 1);
ww = cogl_matrix_get_value (&pm, 3, 3);
xx = graphene_matrix_get_value (&pm, 0, 0);
xy = graphene_matrix_get_value (&pm, 0, 1);
xw = graphene_matrix_get_value (&pm, 0, 3);
yx = graphene_matrix_get_value (&pm, 1, 0);
yy = graphene_matrix_get_value (&pm, 1, 1);
yw = graphene_matrix_get_value (&pm, 1, 3);
wx = graphene_matrix_get_value (&pm, 3, 0);
wy = graphene_matrix_get_value (&pm, 3, 1);
ww = graphene_matrix_get_value (&pm, 3, 3);
cogl_framebuffer_get_viewport4fv (framebuffer, v);
viewport_width = v[2];
@ -300,9 +300,9 @@ get_paint_level (ClutterPaintContext *paint_context,
u0 = width / 2.;
v0 = height / 2.;
xc = xx * u0 + xy * v0 + xw;
yc = yx * u0 + yy * v0 + yw;
wc = wx * u0 + wy * v0 + ww;
xc = xx * u0 + yx * v0 + wx;
yc = xy * u0 + yy * v0 + wy;
wc = xw * u0 + yw * v0 + ww;
/* We'll simplify the equations below for a bit of micro-optimization.
* The commented out code is the unsimplified version.
@ -315,10 +315,10 @@ get_paint_level (ClutterPaintContext *paint_context,
// with respect to u, v, using
// d(a/b)/dx = da/dx * (1/b) - a * db/dx / (b^2)
dxdu = 0.5 * viewport_width * (xx - wx * (xc/wc)) / wc;
dxdv = 0.5 * viewport_width * (xy - wy * (xc/wc)) / wc;
dydu = 0.5 * viewport_height * (yx - wx * (yc/wc)) / wc;
dydv = 0.5 * viewport_height * (yy - wy * (yc/wc)) / wc;
dxdu = 0.5 * viewport_width * (xx - xw * (xc/wc)) / wc;
dxdv = 0.5 * viewport_width * (yx - yw * (xc/wc)) / wc;
dydu = 0.5 * viewport_height * (xy - xw * (yc/wc)) / wc;
dydv = 0.5 * viewport_height * (yy - yw * (yc/wc)) / wc;
// Compute the inverse partials as the matrix inverse
det = dxdu * dydv - dxdv * dydu;
@ -337,10 +337,10 @@ get_paint_level (ClutterPaintContext *paint_context,
*/
/* dxdu * wc, etc */
dxdu_ = 0.5 * viewport_width * (xx - wx * (xc/wc));
dxdv_ = 0.5 * viewport_width * (xy - wy * (xc/wc));
dydu_ = 0.5 * viewport_height * (yx - wx * (yc/wc));
dydv_ = 0.5 * viewport_height * (yy - wy * (yc/wc));
dxdu_ = 0.5 * viewport_width * (xx - xw * (xc/wc));
dxdv_ = 0.5 * viewport_width * (yx - yw * (xc/wc));
dydu_ = 0.5 * viewport_height * (xy - xw * (yc/wc));
dydv_ = 0.5 * viewport_height * (yy - yw * (yc/wc));
/* det * wc^2 */
det_ = dxdu_ * dydv_ - dxdv_ * dydu_;