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texture-tower: Use graphene APIs

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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
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42
src/compositor/meta-texture-tower.c
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@ -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_;