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#include "../include/egl.h"
#include "../include/library_loader.h"
#include <string.h>
static bool gsr_egl_create_window(gsr_egl *self) {
EGLConfig ecfg;
int32_t num_config = 0;
EGLDisplay egl_display = NULL;
EGLSurface egl_surface = NULL;
EGLContext egl_context = NULL;
Window window = None;
int32_t attr[] = {
EGL_BUFFER_SIZE, 24,
EGL_RENDERABLE_TYPE,
EGL_OPENGL_ES2_BIT,
EGL_NONE
};
int32_t ctxattr[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
window = XCreateWindow(self->dpy, DefaultRootWindow(self->dpy), 0, 0, 1, 1, 0, CopyFromParent, InputOutput, CopyFromParent, 0, NULL);
if(!window) {
fprintf(stderr, "gsr error: gsr_gl_create_window failed: failed to create gl window\n");
goto fail;
}
egl_display = self->eglGetDisplay(self->dpy);
if(!egl_display) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: eglGetDisplay failed\n");
goto fail;
}
if(!self->eglInitialize(egl_display, NULL, NULL)) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: eglInitialize failed\n");
goto fail;
}
if(!self->eglChooseConfig(egl_display, attr, &ecfg, 1, &num_config) || num_config != 1) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to find a matching config\n");
goto fail;
}
egl_surface = self->eglCreateWindowSurface(egl_display, ecfg, (EGLNativeWindowType)window, NULL);
if(!egl_surface) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to create window surface\n");
goto fail;
}
egl_context = self->eglCreateContext(egl_display, ecfg, NULL, ctxattr);
if(!egl_context) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to create egl context\n");
goto fail;
}
if(!self->eglMakeCurrent(egl_display, egl_surface, egl_surface, egl_context)) {
fprintf(stderr, "gsr error: gsr_egl_create_window failed: failed to make context current\n");
goto fail;
}
self->egl_display = egl_display;
self->egl_surface = egl_surface;
self->egl_context = egl_context;
self->window = window;
return true;
fail:
if(egl_context)
self->eglDestroyContext(egl_display, egl_context);
if(egl_surface)
self->eglDestroySurface(egl_display, egl_surface);
if(egl_display)
self->eglTerminate(egl_display);
if(window)
XDestroyWindow(self->dpy, window);
return false;
}
static bool gsr_egl_load_egl(gsr_egl *self, void *library) {
dlsym_assign required_dlsym[] = {
{ (void**)&self->eglGetError, "eglGetError" },
{ (void**)&self->eglGetDisplay, "eglGetDisplay" },
{ (void**)&self->eglInitialize, "eglInitialize" },
{ (void**)&self->eglTerminate, "eglTerminate" },
{ (void**)&self->eglChooseConfig, "eglChooseConfig" },
{ (void**)&self->eglCreateWindowSurface, "eglCreateWindowSurface" },
{ (void**)&self->eglCreateContext, "eglCreateContext" },
{ (void**)&self->eglMakeCurrent, "eglMakeCurrent" },
{ (void**)&self->eglCreateImage, "eglCreateImage" },
{ (void**)&self->eglDestroyContext, "eglDestroyContext" },
{ (void**)&self->eglDestroySurface, "eglDestroySurface" },
{ (void**)&self->eglDestroyImage, "eglDestroyImage" },
{ (void**)&self->eglSwapInterval, "eglSwapInterval" },
{ (void**)&self->eglSwapBuffers, "eglSwapBuffers" },
{ (void**)&self->eglGetProcAddress, "eglGetProcAddress" },
{ NULL, NULL }
};
if(!dlsym_load_list(library, required_dlsym)) {
fprintf(stderr, "gsr error: gsr_egl_load failed: missing required symbols in libEGL.so.1\n");
return false;
}
return true;
}
static bool gsr_egl_proc_load_egl(gsr_egl *self) {
self->glEGLImageTargetTexture2DOES = self->eglGetProcAddress("glEGLImageTargetTexture2DOES");
if(!self->glEGLImageTargetTexture2DOES) {
fprintf(stderr, "gsr error: gsr_egl_load failed: could not find glEGLImageTargetTexture2DOES\n");
return false;
}
return true;
}
static bool gsr_egl_load_gl(gsr_egl *self, void *library) {
dlsym_assign required_dlsym[] = {
{ (void**)&self->glGetError, "glGetError" },
{ (void**)&self->glGetString, "glGetString" },
{ (void**)&self->glClear, "glClear" },
{ (void**)&self->glClearColor, "glClearColor" },
{ (void**)&self->glGenTextures, "glGenTextures" },
{ (void**)&self->glDeleteTextures, "glDeleteTextures" },
{ (void**)&self->glBindTexture, "glBindTexture" },
{ (void**)&self->glTexParameteri, "glTexParameteri" },
{ (void**)&self->glGetTexLevelParameteriv, "glGetTexLevelParameteriv" },
{ (void**)&self->glTexImage2D, "glTexImage2D" },
{ (void**)&self->glCopyImageSubData, "glCopyImageSubData" },
{ (void**)&self->glClearTexImage, "glClearTexImage" },
{ (void**)&self->glGenFramebuffers, "glGenFramebuffers" },
{ (void**)&self->glBindFramebuffer, "glBindFramebuffer" },
{ (void**)&self->glViewport, "glViewport" },
{ (void**)&self->glFramebufferTexture2D, "glFramebufferTexture2D" },
{ (void**)&self->glDrawBuffers, "glDrawBuffers" },
{ (void**)&self->glCheckFramebufferStatus, "glCheckFramebufferStatus" },
{ (void**)&self->glBindBuffer, "glBindBuffer" },
{ (void**)&self->glGenBuffers, "glGenBuffers" },
{ (void**)&self->glBufferData, "glBufferData" },
{ (void**)&self->glGenVertexArrays, "glGenVertexArrays" },
{ (void**)&self->glBindVertexArray, "glBindVertexArray" },
{ (void**)&self->glCreateProgram, "glCreateProgram" },
{ (void**)&self->glCreateShader, "glCreateShader" },
{ (void**)&self->glAttachShader, "glAttachShader" },
{ (void**)&self->glBindAttribLocation, "glBindAttribLocation" },
{ (void**)&self->glCompileShader, "glCompileShader" },
{ (void**)&self->glLinkProgram, "glLinkProgram" },
{ (void**)&self->glShaderSource, "glShaderSource" },
{ (void**)&self->glUseProgram, "glUseProgram" },
{ (void**)&self->glGetProgramInfoLog, "glGetProgramInfoLog" },
{ (void**)&self->glGetShaderiv, "glGetShaderiv" },
{ (void**)&self->glGetShaderInfoLog, "glGetShaderInfoLog" },
{ (void**)&self->glDeleteProgram, "glDeleteProgram" },
{ (void**)&self->glDeleteShader, "glDeleteShader" },
{ (void**)&self->glGetProgramiv, "glGetProgramiv" },
{ (void**)&self->glVertexAttribPointer, "glVertexAttribPointer" },
{ (void**)&self->glEnableVertexAttribArray, "glEnableVertexAttribArray" },
{ (void**)&self->glDrawArrays, "glDrawArrays" },
{ NULL, NULL }
};
if(!dlsym_load_list(library, required_dlsym)) {
fprintf(stderr, "gsr error: gsr_egl_load failed: missing required symbols in libGL.so.1\n");
return false;
}
return true;
}
bool gsr_egl_load(gsr_egl *self, Display *dpy) {
memset(self, 0, sizeof(gsr_egl));
self->dpy = dpy;
void *egl_lib = NULL;
void *gl_lib = NULL;
dlerror(); /* clear */
egl_lib = dlopen("libEGL.so.1", RTLD_LAZY);
if(!egl_lib) {
fprintf(stderr, "gsr error: gsr_egl_load: failed to load libEGL.so.1, error: %s\n", dlerror());
goto fail;
}
gl_lib = dlopen("libGL.so.1", RTLD_LAZY);
if(!egl_lib) {
fprintf(stderr, "gsr error: gsr_egl_load: failed to load libGL.so.1, error: %s\n", dlerror());
goto fail;
}
if(!gsr_egl_load_egl(self, egl_lib))
goto fail;
if(!gsr_egl_load_gl(self, gl_lib))
goto fail;
if(!gsr_egl_proc_load_egl(self))
goto fail;
if(!gsr_egl_create_window(self))
goto fail;
self->egl_library = egl_lib;
self->gl_library = gl_lib;
return true;
fail:
if(egl_lib)
dlclose(egl_lib);
if(gl_lib)
dlclose(gl_lib);
memset(self, 0, sizeof(gsr_egl));
return false;
}
void gsr_egl_unload(gsr_egl *self) {
if(self->egl_context) {
self->eglDestroyContext(self->egl_display, self->egl_context);
self->egl_context = NULL;
}
if(self->egl_surface) {
self->eglDestroySurface(self->egl_display, self->egl_surface);
self->egl_surface = NULL;
}
if(self->egl_display) {
self->eglTerminate(self->egl_display);
self->egl_display = NULL;
}
if(self->window) {
XDestroyWindow(self->dpy, self->window);
self->window = None;
}
if(self->egl_library) {
dlclose(self->egl_library);
self->egl_library = NULL;
}
if(self->gl_library) {
dlclose(self->gl_library);
self->gl_library = NULL;
}
memset(self, 0, sizeof(gsr_egl));
}
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