343 lines
8.8 KiB
C
343 lines
8.8 KiB
C
#define _POSIX_C_SOURCE 199309L
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#define _XOPEN_SOURCE 500
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <string.h>
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#include <unistd.h>
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#include <wayland-server.h>
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#include <wayland-server-protocol.h>
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#include <GLES3/gl3.h>
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#include <wlr/render/matrix.h>
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#include <wlr/render.h>
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#include <wlr/backend.h>
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#include <wlr/session.h>
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#include <wlr/types.h>
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#include <math.h>
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#include "cat.h"
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static const GLchar vert_src[] =
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"uniform mat4 proj;\n"
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"attribute vec2 pos;\n"
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"attribute vec2 texcoord;\n"
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"varying vec2 v_texcoord;\n"
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"void main() {\n"
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" gl_Position = proj * vec4(pos, 0.0, 1.0);\n"
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" v_texcoord = texcoord;\n"
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"}\n";
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static const GLchar frag_src[] =
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"precision mediump float;\n"
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"varying vec2 v_texcoord;\n"
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"uniform sampler2D tex;\n"
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"void main() {\n"
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" gl_FragColor = texture2D(tex, v_texcoord);\n"
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"}\n";
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struct state {
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struct wl_listener output_add;
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struct wl_listener output_remove;
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struct wl_list outputs;
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struct wl_list config;
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struct gl {
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struct wlr_shader *shader;
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GLuint vao;
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GLuint vbo;
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GLuint ebo;
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GLuint tex;
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} gl;
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};
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struct output_state {
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struct timespec last_frame;
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struct wl_list link;
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struct wlr_output *output;
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struct state *state;
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struct wl_listener frame;
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float x, y;
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float vel_x, vel_y;
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};
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struct output_config {
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char *name;
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enum wl_output_transform transform;
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struct wl_list link;
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};
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static void init_gl(struct gl *gl) {
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gl->shader = wlr_shader_init(vert_src);
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if (!gl->shader) {
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exit(1);
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}
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if (!wlr_shader_add_format(gl->shader, WL_SHM_FORMAT_RGB332, frag_src)) {
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exit(1);
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}
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GLfloat verticies[] = {
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1, 1, 1, 1, // bottom right
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1, 0, 1, 0, // top right
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0, 0, 0, 0, // top left
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0, 1, 0, 1, // bottom left
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};
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GLuint indicies[] = {
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0, 1, 3,
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1, 2, 3,
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};
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glGenVertexArrays(1, &gl->vao);
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glGenBuffers(1, &gl->vbo);
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glBindVertexArray(gl->vao);
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glBindBuffer(GL_ARRAY_BUFFER, gl->vbo);
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glEnableVertexAttribArray(0);
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glEnableVertexAttribArray(1);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (void *)0);
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glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(GLfloat), (void *)(2 * sizeof(GLfloat)));
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glBufferData(GL_ARRAY_BUFFER, sizeof(verticies), verticies, GL_STATIC_DRAW);
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glGenBuffers(1, &gl->ebo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, gl->ebo);
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glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indicies), indicies, GL_STATIC_DRAW);
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glGenTextures(1, &gl->tex);
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glBindTexture(GL_TEXTURE_2D, gl->tex);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, cat_tex.width, cat_tex.height,
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0, GL_RGB, GL_UNSIGNED_BYTE, cat_tex.pixel_data);
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}
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static void cleanup_gl(struct gl *gl) {
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wlr_shader_destroy(gl->shader);
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glDeleteVertexArrays(1, &gl->vao);
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glDeleteBuffers(1, &gl->vbo);
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glDeleteTextures(1, &gl->tex);
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}
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static void output_frame(struct wl_listener *listener, void *data) {
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struct output_state *ostate = wl_container_of(listener, ostate, frame);
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struct wlr_output *output = ostate->output;
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struct state *s = ostate->state;
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glClearColor(0.25f, 0.25f, 0.25f, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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int32_t width = output->width;
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int32_t height = output->height;
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glViewport(0, 0, width, height);
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wlr_output_effective_resolution(output, &width, &height);
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wlr_shader_use(s->gl.shader, WL_SHM_FORMAT_RGB332);
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glBindVertexArray(s->gl.vao);
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glBindBuffer(GL_ARRAY_BUFFER, s->gl.vbo);
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glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, s->gl.ebo);
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glActiveTexture(GL_TEXTURE0 + 1);
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glBindTexture(GL_TEXTURE_2D, s->gl.tex);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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float world[16], final[16];
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wlr_matrix_identity(&final);
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wlr_matrix_translate(&world, ostate->x, ostate->y, 0);
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wlr_matrix_mul(&final, &world, &final);
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wlr_matrix_scale(&world, 128, 128, 1);
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wlr_matrix_mul(&final, &world, &final);
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wlr_matrix_mul(&output->transform_matrix, &final, &final);
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glUniformMatrix4fv(0, 1, GL_TRUE, final);
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glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
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struct timespec now;
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clock_gettime(CLOCK_MONOTONIC, &now);
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long ms = (now.tv_sec - ostate->last_frame.tv_sec) * 1000 +
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(now.tv_nsec - ostate->last_frame.tv_nsec) / 1000000;
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float seconds = ms / 1000.0f;
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ostate->x += ostate->vel_x * seconds;
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ostate->y += ostate->vel_y * seconds;
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if (ostate->y > height - 128) {
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ostate->vel_y = -ostate->vel_y;
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} else {
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ostate->vel_y += 50 * seconds;
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}
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if (ostate->x > width - 128 || ostate->x < 0) {
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ostate->vel_x = -ostate->vel_x;
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}
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ostate->last_frame = now;
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}
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static void output_add(struct wl_listener *listener, void *data) {
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struct wlr_output *output = data;
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struct state *state = wl_container_of(listener, state, output_add);
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fprintf(stderr, "Output '%s' added\n", output->name);
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wlr_output_set_mode(output, output->modes->items[0]);
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struct output_state *ostate = calloc(1, sizeof(struct output_state));
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clock_gettime(CLOCK_MONOTONIC, &ostate->last_frame);
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ostate->output = output;
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ostate->state = state;
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ostate->frame.notify = output_frame;
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ostate->x = ostate->y = 0;
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ostate->vel_x = 100;
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ostate->vel_y = 0;
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struct output_config *conf;
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wl_list_for_each(conf, &state->config, link) {
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if (strcmp(conf->name, output->name) == 0) {
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wlr_output_transform(ostate->output, conf->transform);
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break;
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}
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}
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wl_list_init(&ostate->frame.link);
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wl_signal_add(&output->events.frame, &ostate->frame);
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wl_list_insert(&state->outputs, &ostate->link);
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}
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static void output_remove(struct wl_listener *listener, void *data) {
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struct wlr_output *output = data;
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struct state *state = wl_container_of(listener, state, output_remove);
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struct output_state *ostate;
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wl_list_for_each(ostate, &state->outputs, link) {
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if (ostate->output == output) {
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wl_list_remove(&ostate->link);
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wl_list_remove(&ostate->frame.link);
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free(ostate);
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break;
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}
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}
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}
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static int timer_done(void *data) {
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*(bool *)data = true;
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return 1;
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}
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static void usage(const char *name, int ret) {
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fprintf(stderr,
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"usage: %s [-d <name> [-r <rotation> | -f]]*\n"
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"\n"
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" -o <output> The name of the DRM display. e.g. DVI-I-1.\n"
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" -r <rotation> The rotation counter clockwise. Valid values are 90, 180, 270.\n"
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" -f Flip the output along the vertical axis.\n", name);
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exit(ret);
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}
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static void parse_args(int argc, char *argv[], struct wl_list *config) {
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struct output_config *oc = NULL;
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int c;
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while ((c = getopt(argc, argv, "o:r:fh")) != -1) {
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switch (c) {
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case 'o':
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oc = calloc(1, sizeof(*oc));
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oc->name = optarg;
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oc->transform = WL_OUTPUT_TRANSFORM_NORMAL;
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wl_list_insert(config, &oc->link);
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break;
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case 'r':
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if (!oc) {
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fprintf(stderr, "You must specify an output first\n");
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usage(argv[0], 1);
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}
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if (oc->transform != WL_OUTPUT_TRANSFORM_NORMAL
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&& oc->transform != WL_OUTPUT_TRANSFORM_FLIPPED) {
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fprintf(stderr, "Rotation for %s already specified\n", oc->name);
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usage(argv[0], 1);
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}
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if (strcmp(optarg, "90") == 0) {
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oc->transform += WL_OUTPUT_TRANSFORM_90;
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} else if (strcmp(optarg, "180") == 0) {
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oc->transform += WL_OUTPUT_TRANSFORM_180;
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} else if (strcmp(optarg, "270") == 0) {
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oc->transform += WL_OUTPUT_TRANSFORM_270;
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} else {
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fprintf(stderr, "Invalid rotation '%s'\n", optarg);
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usage(argv[0], 1);
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}
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break;
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case 'f':
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if (!oc) {
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fprintf(stderr, "You must specify an output first\n");
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usage(argv[0], 1);
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}
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if (oc->transform >= WL_OUTPUT_TRANSFORM_FLIPPED) {
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fprintf(stderr, "Flip for %s already specified\n", oc->name);
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usage(argv[0], 1);
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}
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oc->transform += WL_OUTPUT_TRANSFORM_FLIPPED;
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break;
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case 'h':
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case '?':
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usage(argv[0], c != 'h');
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}
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}
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}
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int main(int argc, char *argv[]) {
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struct state state = {
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.output_add = { .notify = output_add },
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.output_remove = { .notify = output_remove }
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};
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wl_list_init(&state.outputs);
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wl_list_init(&state.config);
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wl_list_init(&state.output_add.link);
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wl_list_init(&state.output_remove.link);
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parse_args(argc, argv, &state.config);
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struct wl_display *display = wl_display_create();
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struct wl_event_loop *event_loop = wl_display_get_event_loop(display);
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struct wlr_session *session = wlr_session_start(display);
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if (!session) {
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return 1;
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}
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struct wlr_backend *wlr = wlr_backend_autocreate(display, session);
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if (!wlr) {
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return 1;
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}
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wl_signal_add(&wlr->events.output_add, &state.output_add);
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wl_signal_add(&wlr->events.output_remove, &state.output_remove);
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if (!wlr_backend_init(wlr)) {
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return 1;
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}
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init_gl(&state.gl);
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bool done = false;
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struct wl_event_source *timer = wl_event_loop_add_timer(event_loop,
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timer_done, &done);
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wl_event_source_timer_update(timer, 30000);
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while (!done) {
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wl_event_loop_dispatch(event_loop, 0);
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}
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cleanup_gl(&state.gl);
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wl_event_source_remove(timer);
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wlr_backend_destroy(wlr);
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wlr_session_finish(session);
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wl_display_destroy(display);
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struct output_config *ptr, *tmp;
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wl_list_for_each_safe(ptr, tmp, &state.config, link) {
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free(ptr);
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}
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}
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