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pixman-renderer: refactor transformation computation

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Move the code computing the end-to-end transformation from
repaint_region() into a new function
pixman_renderer_compute_transform().

The code itself is not modified.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Reviewed-By: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
This commit is contained in:
Pekka Paalanen 2015-03-04 14:18:39 +02:00
parent e54e31c84c
commit 6ea523b85d
1 changed files with 25 additions and 16 deletions
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41
src/pixman-renderer.c
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@ -156,6 +156,30 @@ weston_matrix_to_pixman_transform(pixman_transform_t *pt,
pt->matrix[2][2] = pixman_double_to_fixed(wm->d[15]);
}
static void
pixman_renderer_compute_transform(pixman_transform_t *transform_out,
struct weston_view *ev,
struct weston_output *output)
{
struct weston_matrix matrix;
/* Set up the source transformation based on the surface
position, the output position/transform/scale and the client
specified buffer transform/scale */
weston_matrix_invert(&matrix, &output->matrix);
if (ev->transform.enabled) {
weston_matrix_multiply(&matrix, &ev->transform.inverse);
} else {
weston_matrix_translate(&matrix,
-ev->geometry.x, -ev->geometry.y, 0);
}
weston_matrix_multiply(&matrix, &ev->surface->surface_to_buffer_matrix);
weston_matrix_to_pixman_transform(transform_out, &matrix);
}
static void
repaint_region(struct weston_view *ev, struct weston_output *output,
pixman_region32_t *region, pixman_region32_t *surf_region,
@ -169,7 +193,6 @@ repaint_region(struct weston_view *ev, struct weston_output *output,
pixman_region32_t final_region;
float view_x, view_y;
pixman_transform_t transform;
struct weston_matrix matrix;
pixman_image_t *mask_image;
pixman_color_t mask = { 0, };
@ -203,21 +226,7 @@ repaint_region(struct weston_view *ev, struct weston_output *output,
/* And clip to it */
pixman_image_set_clip_region32 (po->shadow_image, &final_region);
/* Set up the source transformation based on the surface
position, the output position/transform/scale and the client
specified buffer transform/scale */
weston_matrix_invert(&matrix, &output->matrix);
if (ev->transform.enabled) {
weston_matrix_multiply(&matrix, &ev->transform.inverse);
} else {
weston_matrix_translate(&matrix,
-ev->geometry.x, -ev->geometry.y, 0);
}
weston_matrix_multiply(&matrix, &ev->surface->surface_to_buffer_matrix);
weston_matrix_to_pixman_transform(&transform, &matrix);
pixman_renderer_compute_transform(&transform, ev, output);
pixman_image_set_transform(ps->image, &transform);
if (ev->transform.enabled || output->current_scale != vp->buffer.scale)