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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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clients/simple-shm.c
+13 -7
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@@ -160,10 +160,10 @@ destroy_window(struct window *window)
} }
static void 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 halfh = padding + (height - padding * 2) / 2;
const int halfw = width / 2; const int halfw = padding + (width - padding * 2) / 2;
int ir, or; int ir, or;
uint32_t *pixel = image; uint32_t *pixel = image;
int y; int y;
@@ -174,11 +174,13 @@ paint_pixels(void *image, int width, int height, uint32_t time)
or *= or; or *= or;
ir *= ir; ir *= ir;
for (y = 0; y < height; y++) { pixel += padding * width;
for (y = padding; y < height - padding; y++) {
int x; int x;
int y2 = (y - halfh) * (y - halfh); int y2 = (y - halfh) * (y - halfh);
for (x = 0; x < width; x++) { pixel += padding;
for (x = padding; x < width - padding; x++) {
uint32_t v; uint32_t v;
/* squared distance from center */ /* squared distance from center */
@@ -198,6 +200,8 @@ paint_pixels(void *image, int width, int height, uint32_t time)
*pixel++ = v; *pixel++ = v;
} }
pixel += padding;
} }
} }
@@ -208,9 +212,9 @@ redraw(void *data, struct wl_callback *callback, uint32_t time)
{ {
struct window *window = data; 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, wl_surface_damage(window->surface,
0, 0, window->width, window->height); 20, 20, window->width - 40, window->height - 40);
if (callback) if (callback)
wl_callback_destroy(callback); wl_callback_destroy(callback);
@@ -329,7 +333,9 @@ main(int argc, char **argv)
sigint.sa_flags = SA_RESETHAND; sigint.sa_flags = SA_RESETHAND;
sigaction(SIGINT, &sigint, NULL); sigaction(SIGINT, &sigint, NULL);
memset(window->shm_data, 0xff, window->width * window->height * 4);
wl_surface_attach(window->surface, window->buffer, 0, 0); wl_surface_attach(window->surface, window->buffer, 0, 0);
redraw(window, NULL, 0); redraw(window, NULL, 0);
while (running) while (running)