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Diffstat (limited to 'clients/simple-egl.c')
| -rw-r--r-- | clients/simple-egl.c | 781 |
1 files changed, 781 insertions, 0 deletions
diff --git a/clients/simple-egl.c b/clients/simple-egl.c new file mode 100644 index 00000000..1fd41379 --- /dev/null +++ b/clients/simple-egl.c @@ -0,0 +1,781 @@ +/* + * Copyright © 2011 Benjamin Franzke + * + * Permission to use, copy, modify, distribute, and sell this software and its + * documentation for any purpose is hereby granted without fee, provided that + * the above copyright notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting documentation, and + * that the name of the copyright holders not be used in advertising or + * publicity pertaining to distribution of the software without specific, + * written prior permission. The copyright holders make no representations + * about the suitability of this software for any purpose. It is provided "as + * is" without express or implied warranty. + * + * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR + * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, + * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE + * OF THIS SOFTWARE. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdbool.h> +#include <math.h> +#include <assert.h> +#include <signal.h> + +#include <linux/input.h> + +#include <wayland-client.h> +#include <wayland-egl.h> +#include <wayland-cursor.h> + +#include <GLES2/gl2.h> +#include <EGL/egl.h> +#include <EGL/eglext.h> + +#ifndef EGL_EXT_swap_buffers_with_damage +#define EGL_EXT_swap_buffers_with_damage 1 +typedef EGLBoolean (EGLAPIENTRYP PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC)(EGLDisplay dpy, EGLSurface surface, EGLint *rects, EGLint n_rects); +#endif + +#ifndef EGL_EXT_buffer_age +#define EGL_EXT_buffer_age 1 +#define EGL_BUFFER_AGE_EXT 0x313D +#endif + +struct window; +struct seat; + +struct display { + struct wl_display *display; + struct wl_registry *registry; + struct wl_compositor *compositor; + struct wl_shell *shell; + struct wl_seat *seat; + struct wl_pointer *pointer; + struct wl_touch *touch; + struct wl_keyboard *keyboard; + struct wl_shm *shm; + struct wl_cursor_theme *cursor_theme; + struct wl_cursor *default_cursor; + struct wl_surface *cursor_surface; + struct { + EGLDisplay dpy; + EGLContext ctx; + EGLConfig conf; + } egl; + struct window *window; + + PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC swap_buffers_with_damage; +}; + +struct geometry { + int width, height; +}; + +struct window { + struct display *display; + struct geometry geometry, window_size; + struct { + GLuint rotation_uniform; + GLuint pos; + GLuint col; + } gl; + + struct wl_egl_window *native; + struct wl_surface *surface; + struct wl_shell_surface *shell_surface; + EGLSurface egl_surface; + struct wl_callback *callback; + int fullscreen, configured, opaque; +}; + +static const char *vert_shader_text = + "uniform mat4 rotation;\n" + "attribute vec4 pos;\n" + "attribute vec4 color;\n" + "varying vec4 v_color;\n" + "void main() {\n" + " gl_Position = rotation * pos;\n" + " v_color = color;\n" + "}\n"; + +static const char *frag_shader_text = + "precision mediump float;\n" + "varying vec4 v_color;\n" + "void main() {\n" + " gl_FragColor = v_color;\n" + "}\n"; + +static int running = 1; + +static void +init_egl(struct display *display, int opaque) +{ + static const EGLint context_attribs[] = { + EGL_CONTEXT_CLIENT_VERSION, 2, + EGL_NONE + }; + const char *extensions; + + EGLint config_attribs[] = { + EGL_SURFACE_TYPE, EGL_WINDOW_BIT, + EGL_RED_SIZE, 1, + EGL_GREEN_SIZE, 1, + EGL_BLUE_SIZE, 1, + EGL_ALPHA_SIZE, 1, + EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT, + EGL_NONE + }; + + EGLint major, minor, n; + EGLBoolean ret; + + if (opaque) + config_attribs[9] = 0; + + display->egl.dpy = eglGetDisplay(display->display); + assert(display->egl.dpy); + + ret = eglInitialize(display->egl.dpy, &major, &minor); + assert(ret == EGL_TRUE); + ret = eglBindAPI(EGL_OPENGL_ES_API); + assert(ret == EGL_TRUE); + + ret = eglChooseConfig(display->egl.dpy, config_attribs, + &display->egl.conf, 1, &n); + assert(ret && n == 1); + + display->egl.ctx = eglCreateContext(display->egl.dpy, + display->egl.conf, + EGL_NO_CONTEXT, context_attribs); + assert(display->egl.ctx); + + display->swap_buffers_with_damage = NULL; + extensions = eglQueryString(display->egl.dpy, EGL_EXTENSIONS); + if (extensions && + strstr(extensions, "EGL_EXT_swap_buffers_with_damage") && + strstr(extensions, "EGL_EXT_buffer_age")) + display->swap_buffers_with_damage = + (PFNEGLSWAPBUFFERSWITHDAMAGEEXTPROC) + eglGetProcAddress("eglSwapBuffersWithDamageEXT"); + + if (display->swap_buffers_with_damage) + printf("has EGL_EXT_buffer_age and EGL_EXT_swap_buffers_with_damage\n"); + +} + +static void +fini_egl(struct display *display) +{ + eglTerminate(display->egl.dpy); + eglReleaseThread(); +} + +static GLuint +create_shader(struct window *window, const char *source, GLenum shader_type) +{ + GLuint shader; + GLint status; + + shader = glCreateShader(shader_type); + assert(shader != 0); + + glShaderSource(shader, 1, (const char **) &source, NULL); + glCompileShader(shader); + + glGetShaderiv(shader, GL_COMPILE_STATUS, &status); + if (!status) { + char log[1000]; + GLsizei len; + glGetShaderInfoLog(shader, 1000, &len, log); + fprintf(stderr, "Error: compiling %s: %*s\n", + shader_type == GL_VERTEX_SHADER ? "vertex" : "fragment", + len, log); + exit(1); + } + + return shader; +} + +static void +init_gl(struct window *window) +{ + GLuint frag, vert; + GLuint program; + GLint status; + + frag = create_shader(window, frag_shader_text, GL_FRAGMENT_SHADER); + vert = create_shader(window, vert_shader_text, GL_VERTEX_SHADER); + + program = glCreateProgram(); + glAttachShader(program, frag); + glAttachShader(program, vert); + glLinkProgram(program); + + glGetProgramiv(program, GL_LINK_STATUS, &status); + if (!status) { + char log[1000]; + GLsizei len; + glGetProgramInfoLog(program, 1000, &len, log); + fprintf(stderr, "Error: linking:\n%*s\n", len, log); + exit(1); + } + + glUseProgram(program); + + window->gl.pos = 0; + window->gl.col = 1; + + glBindAttribLocation(program, window->gl.pos, "pos"); + glBindAttribLocation(program, window->gl.col, "color"); + glLinkProgram(program); + + window->gl.rotation_uniform = + glGetUniformLocation(program, "rotation"); +} + +static void +handle_ping(void *data, struct wl_shell_surface *shell_surface, + uint32_t serial) +{ + wl_shell_surface_pong(shell_surface, serial); +} + +static void +handle_configure(void *data, struct wl_shell_surface *shell_surface, + uint32_t edges, int32_t width, int32_t height) +{ + struct window *window = data; + + if (window->native) + wl_egl_window_resize(window->native, width, height, 0, 0); + + window->geometry.width = width; + window->geometry.height = height; + + if (!window->fullscreen) + window->window_size = window->geometry; +} + +static void +handle_popup_done(void *data, struct wl_shell_surface *shell_surface) +{ +} + +static const struct wl_shell_surface_listener shell_surface_listener = { + handle_ping, + handle_configure, + handle_popup_done +}; + +static void +redraw(void *data, struct wl_callback *callback, uint32_t time); + +static void +configure_callback(void *data, struct wl_callback *callback, uint32_t time) +{ + struct window *window = data; + + wl_callback_destroy(callback); + + window->configured = 1; + + if (window->callback == NULL) + redraw(data, NULL, time); +} + +static struct wl_callback_listener configure_callback_listener = { + configure_callback, +}; + +static void +toggle_fullscreen(struct window *window, int fullscreen) +{ + struct wl_callback *callback; + + window->fullscreen = fullscreen; + window->configured = 0; + + if (fullscreen) { + wl_shell_surface_set_fullscreen(window->shell_surface, + WL_SHELL_SURFACE_FULLSCREEN_METHOD_DEFAULT, + 0, NULL); + } else { + wl_shell_surface_set_toplevel(window->shell_surface); + handle_configure(window, window->shell_surface, 0, + window->window_size.width, + window->window_size.height); + } + + callback = wl_display_sync(window->display->display); + wl_callback_add_listener(callback, &configure_callback_listener, + window); +} + +static void +create_surface(struct window *window) +{ + struct display *display = window->display; + EGLBoolean ret; + + window->surface = wl_compositor_create_surface(display->compositor); + window->shell_surface = wl_shell_get_shell_surface(display->shell, + window->surface); + + wl_shell_surface_add_listener(window->shell_surface, + &shell_surface_listener, window); + + window->native = + wl_egl_window_create(window->surface, + window->window_size.width, + window->window_size.height); + window->egl_surface = + eglCreateWindowSurface(display->egl.dpy, + display->egl.conf, + window->native, NULL); + + wl_shell_surface_set_title(window->shell_surface, "simple-egl"); + + ret = eglMakeCurrent(window->display->egl.dpy, window->egl_surface, + window->egl_surface, window->display->egl.ctx); + assert(ret == EGL_TRUE); + + toggle_fullscreen(window, window->fullscreen); +} + +static void +destroy_surface(struct window *window) +{ + /* Required, otherwise segfault in egl_dri2.c: dri2_make_current() + * on eglReleaseThread(). */ + eglMakeCurrent(window->display->egl.dpy, EGL_NO_SURFACE, EGL_NO_SURFACE, + EGL_NO_CONTEXT); + + eglDestroySurface(window->display->egl.dpy, window->egl_surface); + wl_egl_window_destroy(window->native); + + wl_shell_surface_destroy(window->shell_surface); + wl_surface_destroy(window->surface); + + if (window->callback) + wl_callback_destroy(window->callback); +} + +static const struct wl_callback_listener frame_listener; + +static void +redraw(void *data, struct wl_callback *callback, uint32_t time) +{ + struct window *window = data; + struct display *display = window->display; + static const GLfloat verts[3][2] = { + { -0.5, -0.5 }, + { 0.5, -0.5 }, + { 0, 0.5 } + }; + static const GLfloat colors[3][3] = { + { 1, 0, 0 }, + { 0, 1, 0 }, + { 0, 0, 1 } + }; + GLfloat angle; + GLfloat rotation[4][4] = { + { 1, 0, 0, 0 }, + { 0, 1, 0, 0 }, + { 0, 0, 1, 0 }, + { 0, 0, 0, 1 } + }; + static const int32_t speed_div = 5; + static uint32_t start_time = 0; + struct wl_region *region; + EGLint rect[4]; + EGLint buffer_age = 0; + + assert(window->callback == callback); + window->callback = NULL; + + if (callback) + wl_callback_destroy(callback); + + if (!window->configured) + return; + + if (start_time == 0) + start_time = time; + + angle = ((time-start_time) / speed_div) % 360 * M_PI / 180.0; + rotation[0][0] = cos(angle); + rotation[0][2] = sin(angle); + rotation[2][0] = -sin(angle); + rotation[2][2] = cos(angle); + + if (display->swap_buffers_with_damage) + eglQuerySurface(display->egl.dpy, window->egl_surface, + EGL_BUFFER_AGE_EXT, &buffer_age); + + glViewport(0, 0, window->geometry.width, window->geometry.height); + + glUniformMatrix4fv(window->gl.rotation_uniform, 1, GL_FALSE, + (GLfloat *) rotation); + + glClearColor(0.0, 0.0, 0.0, 0.5); + glClear(GL_COLOR_BUFFER_BIT); + + glVertexAttribPointer(window->gl.pos, 2, GL_FLOAT, GL_FALSE, 0, verts); + glVertexAttribPointer(window->gl.col, 3, GL_FLOAT, GL_FALSE, 0, colors); + glEnableVertexAttribArray(window->gl.pos); + glEnableVertexAttribArray(window->gl.col); + + glDrawArrays(GL_TRIANGLES, 0, 3); + + glDisableVertexAttribArray(window->gl.pos); + glDisableVertexAttribArray(window->gl.col); + + if (window->opaque || window->fullscreen) { + region = wl_compositor_create_region(window->display->compositor); + wl_region_add(region, 0, 0, + window->geometry.width, + window->geometry.height); + wl_surface_set_opaque_region(window->surface, region); + wl_region_destroy(region); + } else { + wl_surface_set_opaque_region(window->surface, NULL); + } + + window->callback = wl_surface_frame(window->surface); + wl_callback_add_listener(window->callback, &frame_listener, window); + + if (display->swap_buffers_with_damage && buffer_age > 0) { + rect[0] = window->geometry.width / 4 - 1; + rect[1] = window->geometry.height / 4 - 1; + rect[2] = window->geometry.width / 2 + 2; + rect[3] = window->geometry.height / 2 + 2; + display->swap_buffers_with_damage(display->egl.dpy, + window->egl_surface, + rect, 1); + } else { + eglSwapBuffers(display->egl.dpy, window->egl_surface); + } +} + +static const struct wl_callback_listener frame_listener = { + redraw +}; + +static void +pointer_handle_enter(void *data, struct wl_pointer *pointer, + uint32_t serial, struct wl_surface *surface, + wl_fixed_t sx, wl_fixed_t sy) +{ + struct display *display = data; + struct wl_buffer *buffer; + struct wl_cursor *cursor = display->default_cursor; + struct wl_cursor_image *image; + + if (display->window->fullscreen) + wl_pointer_set_cursor(pointer, serial, NULL, 0, 0); + else if (cursor) { + image = display->default_cursor->images[0]; + buffer = wl_cursor_image_get_buffer(image); + wl_pointer_set_cursor(pointer, serial, + display->cursor_surface, + image->hotspot_x, + image->hotspot_y); + wl_surface_attach(display->cursor_surface, buffer, 0, 0); + wl_surface_damage(display->cursor_surface, 0, 0, + image->width, image->height); + wl_surface_commit(display->cursor_surface); + } +} + +static void +pointer_handle_leave(void *data, struct wl_pointer *pointer, + uint32_t serial, struct wl_surface *surface) +{ +} + +static void +pointer_handle_motion(void *data, struct wl_pointer *pointer, + uint32_t time, wl_fixed_t sx, wl_fixed_t sy) +{ +} + +static void +pointer_handle_button(void *data, struct wl_pointer *wl_pointer, + uint32_t serial, uint32_t time, uint32_t button, + uint32_t state) +{ + struct display *display = data; + + if (button == BTN_LEFT && state == WL_POINTER_BUTTON_STATE_PRESSED) + wl_shell_surface_move(display->window->shell_surface, + display->seat, serial); +} + +static void +pointer_handle_axis(void *data, struct wl_pointer *wl_pointer, + uint32_t time, uint32_t axis, wl_fixed_t value) +{ +} + +static const struct wl_pointer_listener pointer_listener = { + pointer_handle_enter, + pointer_handle_leave, + pointer_handle_motion, + pointer_handle_button, + pointer_handle_axis, +}; + +static void +touch_handle_down(void *data, struct wl_touch *wl_touch, + uint32_t serial, uint32_t time, struct wl_surface *surface, + int32_t id, wl_fixed_t x_w, wl_fixed_t y_w) +{ + struct display *d = (struct display *)data; + + wl_shell_surface_move(d->window->shell_surface, d->seat, serial); +} + +static void +touch_handle_up(void *data, struct wl_touch *wl_touch, + uint32_t serial, uint32_t time, int32_t id) +{ +} + +static void +touch_handle_motion(void *data, struct wl_touch *wl_touch, + uint32_t time, int32_t id, wl_fixed_t x_w, wl_fixed_t y_w) +{ +} + +static void +touch_handle_frame(void *data, struct wl_touch *wl_touch) +{ +} + +static void +touch_handle_cancel(void *data, struct wl_touch *wl_touch) +{ +} + +static const struct wl_touch_listener touch_listener = { + touch_handle_down, + touch_handle_up, + touch_handle_motion, + touch_handle_frame, + touch_handle_cancel, +}; + +static void +keyboard_handle_keymap(void *data, struct wl_keyboard *keyboard, + uint32_t format, int fd, uint32_t size) +{ +} + +static void +keyboard_handle_enter(void *data, struct wl_keyboard *keyboard, + uint32_t serial, struct wl_surface *surface, + struct wl_array *keys) +{ +} + +static void +keyboard_handle_leave(void *data, struct wl_keyboard *keyboard, + uint32_t serial, struct wl_surface *surface) +{ +} + +static void +keyboard_handle_key(void *data, struct wl_keyboard *keyboard, + uint32_t serial, uint32_t time, uint32_t key, + uint32_t state) +{ + struct display *d = data; + + if (key == KEY_F11 && state) + toggle_fullscreen(d->window, d->window->fullscreen ^ 1); + else if (key == KEY_ESC && state) + running = 0; +} + +static void +keyboard_handle_modifiers(void *data, struct wl_keyboard *keyboard, + uint32_t serial, uint32_t mods_depressed, + uint32_t mods_latched, uint32_t mods_locked, + uint32_t group) +{ +} + +static const struct wl_keyboard_listener keyboard_listener = { + keyboard_handle_keymap, + keyboard_handle_enter, + keyboard_handle_leave, + keyboard_handle_key, + keyboard_handle_modifiers, +}; + +static void +seat_handle_capabilities(void *data, struct wl_seat *seat, + enum wl_seat_capability caps) +{ + struct display *d = data; + + if ((caps & WL_SEAT_CAPABILITY_POINTER) && !d->pointer) { + d->pointer = wl_seat_get_pointer(seat); + wl_pointer_add_listener(d->pointer, &pointer_listener, d); + } else if (!(caps & WL_SEAT_CAPABILITY_POINTER) && d->pointer) { + wl_pointer_destroy(d->pointer); + d->pointer = NULL; + } + + if ((caps & WL_SEAT_CAPABILITY_KEYBOARD) && !d->keyboard) { + d->keyboard = wl_seat_get_keyboard(seat); + wl_keyboard_add_listener(d->keyboard, &keyboard_listener, d); + } else if (!(caps & WL_SEAT_CAPABILITY_KEYBOARD) && d->keyboard) { + wl_keyboard_destroy(d->keyboard); + d->keyboard = NULL; + } + + if ((caps & WL_SEAT_CAPABILITY_TOUCH) && !d->touch) { + d->touch = wl_seat_get_touch(seat); + wl_touch_set_user_data(d->touch, d); + wl_touch_add_listener(d->touch, &touch_listener, d); + } else if (!(caps & WL_SEAT_CAPABILITY_TOUCH) && d->touch) { + wl_touch_destroy(d->touch); + d->touch = NULL; + } +} + +static const struct wl_seat_listener seat_listener = { + seat_handle_capabilities, +}; + +static void +registry_handle_global(void *data, struct wl_registry *registry, + uint32_t name, const char *interface, uint32_t version) +{ + struct display *d = data; + + if (strcmp(interface, "wl_compositor") == 0) { + d->compositor = + wl_registry_bind(registry, name, + &wl_compositor_interface, 1); + } else if (strcmp(interface, "wl_shell") == 0) { + d->shell = wl_registry_bind(registry, name, + &wl_shell_interface, 1); + } else if (strcmp(interface, "wl_seat") == 0) { + d->seat = wl_registry_bind(registry, name, + &wl_seat_interface, 1); + wl_seat_add_listener(d->seat, &seat_listener, d); + } else if (strcmp(interface, "wl_shm") == 0) { + d->shm = wl_registry_bind(registry, name, + &wl_shm_interface, 1); + d->cursor_theme = wl_cursor_theme_load(NULL, 32, d->shm); + d->default_cursor = + wl_cursor_theme_get_cursor(d->cursor_theme, "left_ptr"); + } +} + +static void +registry_handle_global_remove(void *data, struct wl_registry *registry, + uint32_t name) +{ +} + +static const struct wl_registry_listener registry_listener = { + registry_handle_global, + registry_handle_global_remove +}; + +static void +signal_int(int signum) +{ + running = 0; +} + +static void +usage(int error_code) +{ + fprintf(stderr, "Usage: simple-egl [OPTIONS]\n\n" + " -f\tRun in fullscreen mode\n" + " -o\tCreate an opaque surface\n" + " -h\tThis help text\n\n"); + + exit(error_code); +} + +int +main(int argc, char **argv) +{ + struct sigaction sigint; + struct display display = { 0 }; + struct window window = { 0 }; + int i, ret = 0; + + window.display = &display; + display.window = &window; + window.window_size.width = 250; + window.window_size.height = 250; + + for (i = 1; i < argc; i++) { + if (strcmp("-f", argv[i]) == 0) + window.fullscreen = 1; + else if (strcmp("-o", argv[i]) == 0) + window.opaque = 1; + else if (strcmp("-h", argv[i]) == 0) + usage(EXIT_SUCCESS); + else + usage(EXIT_FAILURE); + } + + display.display = wl_display_connect(NULL); + assert(display.display); + + display.registry = wl_display_get_registry(display.display); + wl_registry_add_listener(display.registry, + ®istry_listener, &display); + + wl_display_dispatch(display.display); + + init_egl(&display, window.opaque); + create_surface(&window); + init_gl(&window); + + display.cursor_surface = + wl_compositor_create_surface(display.compositor); + + sigint.sa_handler = signal_int; + sigemptyset(&sigint.sa_mask); + sigint.sa_flags = SA_RESETHAND; + sigaction(SIGINT, &sigint, NULL); + + while (running && ret != -1) + ret = wl_display_dispatch(display.display); + + fprintf(stderr, "simple-egl exiting\n"); + + destroy_surface(&window); + fini_egl(&display); + + wl_surface_destroy(display.cursor_surface); + if (display.cursor_theme) + wl_cursor_theme_destroy(display.cursor_theme); + + if (display.shell) + wl_shell_destroy(display.shell); + + if (display.compositor) + wl_compositor_destroy(display.compositor); + + wl_registry_destroy(display.registry); + wl_display_flush(display.display); + wl_display_disconnect(display.display); + + return 0; +} |