clients/nested-client.c - weston-imx - Git at Google

 /*
  * 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;
 }
	/*
	* 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;
	}