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transformed: Rely on transformation in widget_cairo_create

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Rather than doing our own transformation handling when drawing we
just rely on the generic code in widget_cairo_create
This commit is contained in:
Alexander Larsson 2013-05-22 14:41:26 +02:00 committed by Kristian Høgsberg
parent 15901f0377
commit fd456fb5e0
1 changed files with 8 additions and 61 deletions
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69
clients/transformed.c
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@ -42,67 +42,14 @@ struct transformed {
};
static void
update_transform(cairo_t *cr, enum wl_output_transform transform)
draw_stuff(cairo_t *cr, int width, int height)
{
double angle;
cairo_matrix_t m;
cairo_get_matrix (cr, &m);
switch(transform) {
case WL_OUTPUT_TRANSFORM_FLIPPED:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
cairo_matrix_init(&m, -1, 0, 0, 1, 0, 0);
break;
default:
cairo_matrix_init_identity(&m);
break;
}
switch (transform) {
case WL_OUTPUT_TRANSFORM_NORMAL:
case WL_OUTPUT_TRANSFORM_FLIPPED:
default:
angle = 0;
break;
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
angle = M_PI_2;
break;
case WL_OUTPUT_TRANSFORM_180:
case WL_OUTPUT_TRANSFORM_FLIPPED_180:
angle = M_PI;
break;
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
angle = M_PI + M_PI_2;
break;
}
cairo_rotate(cr, angle);
cairo_transform(cr, &m);
}
static void
draw_stuff(cairo_surface_t *surface, int width, int height, int transform)
{
cairo_t *cr;
int tmp;
if (transform & 1) {
tmp = width;
width = height;
height = tmp;
}
cr = cairo_create(surface);
cairo_identity_matrix(cr);
cairo_translate(cr, width / 2, height / 2);
cairo_scale(cr, width / 2, height / 2);
update_transform(cr, transform);
cairo_set_source_rgba(cr, 0, 0, 0.3, 1.0);
cairo_set_source_rgba(cr, 0, 0, 0, 1.0);
cairo_rectangle(cr, -1, -1, 2, 2);
@ -113,7 +60,7 @@ draw_stuff(cairo_surface_t *surface, int width, int height, int transform)
cairo_line_to(cr, 0, -1);
cairo_save(cr);
cairo_identity_matrix(cr);
cairo_set_matrix(cr, &m);
cairo_set_line_width(cr, 2.0);
cairo_stroke(cr);
cairo_restore(cr);
@ -123,7 +70,7 @@ draw_stuff(cairo_surface_t *surface, int width, int height, int transform)
cairo_line_to(cr, 1, 0);
cairo_save(cr);
cairo_identity_matrix(cr);
cairo_set_matrix(cr, &m);
cairo_set_line_width(cr, 2.0);
cairo_stroke(cr);
cairo_restore(cr);
@ -135,7 +82,7 @@ draw_stuff(cairo_surface_t *surface, int width, int height, int transform)
cairo_line_to(cr, -1, 0);
cairo_save(cr);
cairo_identity_matrix(cr);
cairo_set_matrix(cr, &m);
cairo_set_line_width(cr, 2.0);
cairo_stroke(cr);
cairo_restore(cr);
@ -168,7 +115,7 @@ redraw_handler(struct widget *widget, void *data)
struct transformed *transformed = data;
struct rectangle allocation;
cairo_surface_t *surface;
int transform;
cairo_t *cr;
surface = window_get_surface(transformed->window);
if (surface == NULL ||
@ -178,9 +125,9 @@ redraw_handler(struct widget *widget, void *data)
}
widget_get_allocation(transformed->widget, &allocation);
transform = window_get_buffer_transform(transformed->window);
draw_stuff(surface, allocation.width, allocation.height, transform);
cr = widget_cairo_create(widget);
draw_stuff(cr, allocation.width, allocation.height);
cairo_surface_destroy(surface);
}