wlroots-hyprland/examples/simple.c

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#define _POSIX_C_SOURCE 199309L
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#include <string.h>
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#include <stdio.h>
#include <stdlib.h>
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#include <time.h>
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#include <inttypes.h>
#include <wayland-server.h>
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#include <GLES2/gl2.h>
#include <wlr/backend.h>
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#include <wlr/session.h>
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#include <wlr/types/wlr_output.h>
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#include <xkbcommon/xkbcommon.h>
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#include "shared.h"
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struct sample_state {
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float color[3];
int dec;
};
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void handle_output_frame(struct output_state *output, struct timespec *ts) {
struct compositor_state *state = output->compositor;
struct sample_state *sample = state->data;
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long ms = (ts->tv_sec - state->last_frame.tv_sec) * 1000 +
(ts->tv_nsec - state->last_frame.tv_nsec) / 1000000;
int inc = (sample->dec + 1) % 3;
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sample->color[inc] += ms / 2000.0f;
sample->color[sample->dec] -= ms / 2000.0f;
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if (sample->color[sample->dec] < 0.0f) {
sample->color[inc] = 1.0f;
sample->color[sample->dec] = 0.0f;
sample->dec = inc;
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}
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wlr_output_make_current(output->output);
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glClearColor(sample->color[0], sample->color[1], sample->color[2], 1.0);
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glClear(GL_COLOR_BUFFER_BIT);
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wlr_output_swap_buffers(output->output);
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}
int main() {
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struct sample_state state = {
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.color = { 1.0, 0.0, 0.0 },
.dec = 0,
};
struct compositor_state compositor = { 0,
.data = &state,
.output_frame_cb = handle_output_frame,
};
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compositor_init(&compositor);
compositor_run(&compositor);
}