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glcontext-wayland: Avoid heap-alloacting small arrays...

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every frame.
This commit is contained in:
Timm Bäder 2020-12-24 09:27:31 +01:00
parent fff570538c
commit d7f15c15e9
1 changed files with 11 additions and 3 deletions
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14
gdk/wayland/gdkglcontext-wayland.c
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@ -242,14 +242,22 @@ gdk_wayland_gl_context_end_frame (GdkDrawContext *draw_context,
gdk_profiler_add_mark (GDK_PROFILER_CURRENT_TIME, 0, "wayland", "swap buffers");
if (display_wayland->have_egl_swap_buffers_with_damage)
{
EGLint stack_rects[4 * 4]; /* 4 rects */
EGLint *heap_rects = NULL;
int i, j, n_rects = cairo_region_num_rectangles (painted);
EGLint *rects = g_new (EGLint, n_rects * 4);
cairo_rectangle_int_t rect;
int surface_height = gdk_surface_get_height (surface);
int scale = gdk_surface_get_scale_factor (surface);
EGLint *rects;
if (n_rects < G_N_ELEMENTS (stack_rects) / 4)
rects = (EGLint *)&stack_rects;
else
heap_rects = rects = g_new (EGLint, n_rects * 4);
for (i = 0, j = 0; i < n_rects; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (painted, i, &rect);
rects[j++] = rect.x * scale;
rects[j++] = (surface_height - rect.height - rect.y) * scale;
@ -257,7 +265,7 @@ gdk_wayland_gl_context_end_frame (GdkDrawContext *draw_context,
rects[j++] = rect.height * scale;
}
eglSwapBuffersWithDamageEXT (display_wayland->egl_display, egl_surface, rects, n_rects);
g_free (rects);
g_free (heap_rects);
}
else
eglSwapBuffers (display_wayland->egl_display, egl_surface);