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/* A CPU-rendered window. */
#include <yasl/yasl.h>
#include <yasl/cpu.h>
int main(void)
{
struct yasl_surface_options options = {
.title = "Hello YASL",
.width = 640,
.height = 480,
.type = YASL_SURFACE_CPU,
};
yasl_surface *surface = yasl_surface_create(&options);
if (!surface)
return 1;
int result = 0;
for (;;) {
yasl_event event;
if (yasl_wait_event(&event, -1) < 0) {
result = 1;
break;
}
if (event.type == YASL_EVENT_CLOSE || event.type == YASL_EVENT_QUIT)
break;
if (event.type != YASL_EVENT_REFRESH)
continue;
struct yasl_cpu_buffer buffer;
if (yasl_cpu_acquire(surface, &buffer) < 0) {
result = 1;
break;
}
for (int y = 0; y < buffer.height; y++) {
uint32_t *row = (uint32_t *)((unsigned char *)buffer.pixels + y * buffer.stride_bytes);
for (int x = 0; x < buffer.width; x++) {
/* Opaque premultiplied ARGB: red grows rightward, green downward. */
uint32_t r = (uint32_t)(x * 255 / (buffer.width > 1 ? buffer.width - 1 : 1));
uint32_t g = (uint32_t)(y * 255 / (buffer.height > 1 ? buffer.height - 1 : 1));
row[x] = 0xff000000 | r << 16 | g << 8 | (255 - r);
}
}
if (yasl_cpu_present(surface, &buffer) < 0) {
result = 1;
break;
}
}
yasl_shutdown();
return result;
}
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