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weston/clients/nested-client.c

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8.9 KiB

/*
* Copyright © 2013 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#include "config.h"
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wayland-egl.h>
#include <wayland-cursor.h>
#include <GLES2/gl2.h>
#include <EGL/egl.h>
#include "shared/platform.h"
struct window;
struct seat;
struct nested_client {
struct wl_display *display;
struct wl_registry *registry;
struct wl_compositor *compositor;
EGLDisplay egl_display;
EGLContext egl_context;
EGLConfig egl_config;
EGLSurface egl_surface;
struct program *color_program;
GLuint vert, frag, program;
GLuint rotation;
GLuint pos;
GLuint col;
struct wl_surface *surface;
struct wl_egl_window *native;
int width, height;
};
#define POS 0
#define COL 1
static GLuint
create_shader(const char *source, GLenum shader_type)
{
GLuint shader;
GLint status;
shader = glCreateShader(shader_type);
if (shader == 0)
return 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);
return 0;
}
return shader;
}
static void
create_program(struct nested_client *client,
const char *vert, const char *frag)
{
GLint status;
client->vert = create_shader(vert, GL_VERTEX_SHADER);
client->frag = create_shader(frag, GL_FRAGMENT_SHADER);
client->program = glCreateProgram();
glAttachShader(client->program, client->frag);
glAttachShader(client->program, client->vert);
glBindAttribLocation(client->program, POS, "pos");
glBindAttribLocation(client->program, COL, "color");
glLinkProgram(client->program);
glGetProgramiv(client->program, GL_LINK_STATUS, &status);
if (!status) {
char log[1000];
GLsizei len;
glGetProgramInfoLog(client->program, 1000, &len, log);
fprintf(stderr, "Error: linking:\n%.*s\n", len, log);
exit(1);
}
client->rotation =
glGetUniformLocation(client->program, "rotation");
}
static const char vertex_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 color_fragment_shader_text[] =
"precision mediump float;\n"
"varying vec4 v_color;\n"
"void main() {\n"
" gl_FragColor = v_color;\n"
"}\n";
static void
render_triangle(struct nested_client *client, uint32_t time)
{
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;
if (client->program == 0)
create_program(client, vertex_shader_text,
color_fragment_shader_text);
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);
glClearColor(0.4, 0.4, 0.4, 1.0);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(client->program);
glViewport(0, 0, client->width, client->height);
glUniformMatrix4fv(client->rotation, 1, GL_FALSE,
(GLfloat *) rotation);
glVertexAttribPointer(POS, 2, GL_FLOAT, GL_FALSE, 0, verts);
glVertexAttribPointer(COL, 3, GL_FLOAT, GL_FALSE, 0, colors);
glEnableVertexAttribArray(POS);
glEnableVertexAttribArray(COL);
glDrawArrays(GL_TRIANGLES, 0, 3);
glDisableVertexAttribArray(POS);
glDisableVertexAttribArray(COL);
glFlush();
}
static void
frame_callback(void *data, struct wl_callback *callback, uint32_t time);
static const struct wl_callback_listener frame_listener = {
frame_callback
};
static void
frame_callback(void *data, struct wl_callback *callback, uint32_t time)
{
struct nested_client *client = data;
if (callback)
wl_callback_destroy(callback);
callback = wl_surface_frame(client->surface);
wl_callback_add_listener(callback, &frame_listener, client);
render_triangle(client, time);
eglSwapBuffers(client->egl_display, client->egl_surface);
}
static void
registry_handle_global(void *data, struct wl_registry *registry,
uint32_t name, const char *interface, uint32_t version)
{
struct nested_client *client = data;
if (strcmp(interface, "wl_compositor") == 0) {
client->compositor =
wl_registry_bind(registry, name,
&wl_compositor_interface, 1);
}
}
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 struct nested_client *
nested_client_create(void)
{
static const EGLint context_attribs[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
static const 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;
struct nested_client *client;
client = malloc(sizeof *client);
if (client == NULL)
return NULL;
client->width = 250;
client->height = 250;
client->display = wl_display_connect(NULL);
client->registry = wl_display_get_registry(client->display);
wl_registry_add_listener(client->registry,
&registry_listener, client);
/* get globals */
wl_display_roundtrip(client->display);
client->egl_display =
weston_platform_get_egl_display(EGL_PLATFORM_WAYLAND_KHR,
client->display, NULL);
if (client->egl_display == NULL)
return NULL;
ret = eglInitialize(client->egl_display, &major, &minor);
if (!ret)
return NULL;
ret = eglBindAPI(EGL_OPENGL_ES_API);
if (!ret)
return NULL;
ret = eglChooseConfig(client->egl_display, config_attribs,
&client->egl_config, 1, &n);
if (!ret || n != 1)
return NULL;
client->egl_context = eglCreateContext(client->egl_display,
client->egl_config,
EGL_NO_CONTEXT,
context_attribs);
if (!client->egl_context)
return NULL;
client->surface = wl_compositor_create_surface(client->compositor);
client->native = wl_egl_window_create(client->surface,
client->width, client->height);
client->egl_surface = weston_platform_create_egl_surface(client->egl_display,
client->egl_config,
client->native, NULL);
eglMakeCurrent(client->egl_display, client->egl_surface,
client->egl_surface, client->egl_context);
wl_egl_window_resize(client->native,
client->width, client->height, 0, 0);
frame_callback(client, NULL, 0);
return client;
}
static void
nested_client_destroy(struct nested_client *client)
{
eglMakeCurrent(client->egl_display,
EGL_NO_SURFACE, EGL_NO_SURFACE,
EGL_NO_CONTEXT);
weston_platform_destroy_egl_surface(client->egl_display,
client->egl_surface);
wl_egl_window_destroy(client->native);
wl_surface_destroy(client->surface);
if (client->compositor)
wl_compositor_destroy(client->compositor);
wl_registry_destroy(client->registry);
eglTerminate(client->egl_display);
eglReleaseThread();
wl_display_flush(client->display);
wl_display_disconnect(client->display);
}
int
main(int argc, char **argv)
{
struct nested_client *client;
int ret = 0;
if (getenv("WAYLAND_SOCKET") == NULL) {
fprintf(stderr,
"must be run by nested, don't run standalone\n");
return EXIT_FAILURE;
}
client = nested_client_create();
if (client == NULL)
return EXIT_FAILURE;
while (ret != -1)
ret = wl_display_dispatch(client->display);
nested_client_destroy(client);
return 0;
}