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simple-shm: Draw the test motif surrounded by a white border

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We can then use a wl_surface_damage to just trigger the compositor to update
just a selected region of the buffer and thus test damaging a sub region.
This commit is contained in:
Rob Bradford 2012-10-02 18:03:15 +01:00 committed by Kristian Høgsberg
parent fecf332e19
commit 371805f76e
1 changed files with 13 additions and 7 deletions
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20
clients/simple-shm.c
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@ -160,10 +160,10 @@ destroy_window(struct window *window)
}
static void
paint_pixels(void *image, int width, int height, uint32_t time)
paint_pixels(void *image, int padding, int width, int height, uint32_t time)
{
const int halfh = height / 2;
const int halfw = width / 2;
const int halfh = padding + (height - padding * 2) / 2;
const int halfw = padding + (width - padding * 2) / 2;
int ir, or;
uint32_t *pixel = image;
int y;
@ -174,11 +174,13 @@ paint_pixels(void *image, int width, int height, uint32_t time)
or *= or;
ir *= ir;
for (y = 0; y < height; y++) {
pixel += padding * width;
for (y = padding; y < height - padding; y++) {
int x;
int y2 = (y - halfh) * (y - halfh);
for (x = 0; x < width; x++) {
pixel += padding;
for (x = padding; x < width - padding; x++) {
uint32_t v;
/* squared distance from center */
@ -198,6 +200,8 @@ paint_pixels(void *image, int width, int height, uint32_t time)
*pixel++ = v;
}
pixel += padding;
}
}
@ -208,9 +212,9 @@ redraw(void *data, struct wl_callback *callback, uint32_t time)
{
struct window *window = data;
paint_pixels(window->shm_data, window->width, window->height, time);
paint_pixels(window->shm_data, 20, window->width, window->height, time);
wl_surface_damage(window->surface,
0, 0, window->width, window->height);
20, 20, window->width - 40, window->height - 40);
if (callback)
wl_callback_destroy(callback);
@ -329,7 +333,9 @@ main(int argc, char **argv)
sigint.sa_flags = SA_RESETHAND;
sigaction(SIGINT, &sigint, NULL);
memset(window->shm_data, 0xff, window->width * window->height * 4);
wl_surface_attach(window->surface, window->buffer, 0, 0);
redraw(window, NULL, 0);
while (running)