bool GLShaderImpl::CompileFromSourceImpl(const char *source_text) {
glShaderSource(m_shader_id, 1, &source_text, NULL);
glerr();
glCompileShader(m_shader_id);
glerr();
GLint compiled;
glGetShaderiv(m_shader_id, GL_COMPILE_STATUS, &compiled);
glerr();
if (!compiled) {
GLint info_len;
glGetShaderiv(m_shader_id, GL_INFO_LOG_LENGTH, &info_len);
glerr();
m_last_log.clear();
m_last_log.resize(info_len, '\0');
glGetShaderInfoLog(m_shader_id, info_len, NULL, &m_last_log[0]);
glerr();
} else {
m_is_compiled = true;
}
return compiled != 0;
}
void gameLoop(XStuff* xs, GameState* gs, InputState* is) {
checkResize(xs,gs);
preFrame(gs);
handleInput(gs, is);
setUpView(gs);
// update world state
// depth and picking pre-pass
glDepthFunc(GL_LESS);
glBindFramebuffer(GL_FRAMEBUFFER, gs->framebuffer);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
depthPrepass(xs, gs, is);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, gs->framebuffer);
checkCursor(gs, is);
glBindFramebuffer(GL_FRAMEBUFFER, gs->framebuffer);
// clear color buffer for actual rendering
//glClear(GL_COLOR_BUFFER_BIT);
glerr("pre shader create 1d");
glDepthFunc(GL_LEQUAL);
glerr("pre shader create e");
renderFrame(xs, gs, is);
glBindFramebuffer(GL_FRAMEBUFFER, 0);
glBindFramebuffer(GL_READ_FRAMEBUFFER, gs->framebuffer);
// draw to the screen
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
shadingPass(gs);
renderUI(xs, gs);
gs->screen.resized = 0;
glXSwapBuffers(xs->display, xs->clientWin);
}
GLShaderImpl::GLShaderImpl(GLenum shader_type) {
m_is_compiled = false;
m_need_recompile = false;
m_shader_id = glCreateShader(static_cast<GLenum>(shader_type));
glerr();
m_watcher.RegisterObserver(this);
}
static int make_shader(struct shader *shader)
{
GLint res = GL_FALSE;
GLsizei len = 0;
GLchar log[4096] = "nil";/* FIXME: some drivers return wrong values for
* GL_INFO_LOG_LENGTH use a fixed size instead
*/
timeinit();
if (!shader) {
errno = EFAULT;
return -1;
}
timestart();
shader->id = glCreateShader(shader->type);
if (shader->id == 0) {
glerr("glCreateShader(%s) failed", shader->name);
goto error;
}
glShaderSource(shader->id, 1, &shader->code, NULL);
glCompileShader(shader->id);
glGetShaderiv(shader->id, GL_COMPILE_STATUS, &res);
if (res != GL_TRUE) {
glerr("glCompileShader(%s) failed", shader->name);
goto error;
}
timestop("compiled shader %s, id %d type 0x%04x\n", shader->name,
shader->id, shader->type);
return 0;
error:
if (shader->id > 0) {
glGetShaderInfoLog(shader->id, sizeof(log), &len, log);
_msg("len: %d, log: %s\n", len, log);
glDeleteShader(shader->id);
shader->id = 0;
}
return -1;
}
int program_make(struct program *prog, struct shader **shader, int num)
{
int i;
GLchar log[256] = "nil";
GLsizei len = 0;
GLint res = GL_FALSE;
if (!prog) {
errno = EFAULT;
return -1;
}
timeinit();
prog->id = glCreateProgram();
if (prog->id == 0) {
glerr("glCreateProgram() failed");
return -1;
}
prog->shader = shader;
prog->shader_num = num;
for (i = 0; i < num; i++) {
if (make_shader(shader[i]) < 0) {
_err("shader %s failed\n", shader[i]->name);
goto err;
}
glAttachShader(prog->id, shader[i]->id);
}
timestart();
glLinkProgram(prog->id);
glGetProgramiv(prog->id, GL_LINK_STATUS, &res);
if (res != GL_TRUE) {
_err("failed to link program\n");
goto err;
}
timestop("program %d linked\n", prog->id);
return prog->id;
err:
if (prog->id > 0) {
glGetProgramInfoLog(prog->id, sizeof (log), &len, log);
_msg("len: %d, log: %s\n", len, log);
}
program_clean(prog);
return -1;
}
void initGame(XStuff* xs, GameState* gs) {
int ww, wh;
glerr("left over error on game init");
gs->activeTool = 0;
gs->debugMode = 0;
gs->sunSpeed = 0;
ww = xs->winAttr.width;
wh = xs->winAttr.height;
gs->screen.wh.x = (float)ww;
gs->screen.wh.y = (float)wh;
gs->screen.aspect = gs->screen.wh.x / gs->screen.wh.y;
gs->screen.resized = 0;
printf("w: %d, h: %d\n", ww, wh);
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
initTexBuffers(gs, 0);
glBindTexture(GL_TEXTURE_2D, 0);
glGenFramebuffers(1, &gs->framebuffer);
glBindFramebuffer(GL_FRAMEBUFFER, gs->framebuffer);
glexit("fbo creation");
// The depth buffer
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, gs->diffuseTexBuffer, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT1, GL_TEXTURE_2D, gs->normalTexBuffer, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT2, GL_TEXTURE_2D, gs->selectionTexBuffer, 0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_TEXTURE_2D, gs->depthTexBuffer, 0);
glexit("fb tex2d");
//glFramebufferTexture2D(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_TEXTURE_2D, gs->depthTexBuffer, 0);
GLenum DrawBuffers[] = {
GL_COLOR_ATTACHMENT0,
GL_COLOR_ATTACHMENT1,
GL_COLOR_ATTACHMENT2
};
glDrawBuffers(3, DrawBuffers);
glexit("drawbuffers");
GLenum status;
status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
if(status != GL_FRAMEBUFFER_COMPLETE) {
printf("fbo status invalid\n");
exit(1);
}
printf("FBO created.\n");
shadingProg = loadCombinedProgram("shading");
initFSQuad();
// check some prerequisites
// GLint MaxDrawBuffers = 0;
// glGetIntegerv(GL_MAX_DRAW_BUFFERS, &MaxDrawBuffers);
// printf("MAX_DRAW_BUFFERS: %d\n", MaxDrawBuffers);
// if(MaxDrawBuffers < 4) {
// fprintf(stderr, "FATAL: GL_MAX_DRAW_BUFFERS is too low: %d. Minimum required value is 4.\n", MaxDrawBuffers);
// exit(3);
// };
getPrintGLEnum(GL_MAX_COLOR_ATTACHMENTS, "meh");
getPrintGLEnum(GL_MAX_DRAW_BUFFERS, "meh");
getPrintGLEnum(GL_MAX_FRAMEBUFFER_WIDTH, "meh");
getPrintGLEnum(GL_MAX_FRAMEBUFFER_HEIGHT, "meh");
getPrintGLEnum(GL_MAX_FRAMEBUFFER_LAYERS, "meh");
getPrintGLEnum(GL_MAX_FRAMEBUFFER_SAMPLES, "meh");
getPrintGLEnum(GL_MAX_VERTEX_TEXTURE_IMAGE_UNITS, "meh");
getPrintGLEnum(GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS, "meh");
getPrintGLEnum(GL_MAX_GEOMETRY_TEXTURE_IMAGE_UNITS, "meh");
getPrintGLEnum(GL_MAX_TEXTURE_IMAGE_UNITS, "meh");
getPrintGLEnum(GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, "meh");
getPrintGLEnum(GL_MAX_ARRAY_TEXTURE_LAYERS, "meh");
getPrintGLEnum(GL_MAX_SAMPLES, "meh");
// set up matrix stacks
MatrixStack* view, *proj;
view = &gs->view;
proj = &gs->proj;
msAlloc(2, view);
msAlloc(2, proj);
msIdent(view);
msIdent(proj);
// perspective matrix, pretty standard
// msPerspective(60, 1.0, 01000.0f, 100000.0f, proj);
// msOrtho(0, 1, 0, 1, .01, 100000, proj);
gs->zoom = -760.0;
gs->direction = 0.0f;
gs->lookCenter.x = 128;
gs->lookCenter.y = 128;
// initialize all those magic globals
initMap(&gs->map);
initUI(gs);
initMarker();
// text rendering stuff
arial = LoadFont("Arial", 64, NULL);
glerr("clearing before text program load");
textProg = loadCombinedProgram("text");
unsigned int colors[] = {
0xFF0000FF, 2,
0x00FF00FF, 4,
0x0000FFFF, INT_MAX
};
strRI = prepareText(arial, "FPS: --", -1, colors);
/*
OBJContents cube;
loadOBJFile("assets/models/untitled.obj", 0, &cube);
Mesh* cubem = OBJtoMesh(&cube);
*/
}
GLShaderImpl::~GLShaderImpl() {
glDeleteShader(m_shader_id);
glerr();
m_watcher.UnregisterObserver(this);
}
static bool
borisgl_initialize(int width, int height, const char *title)
{
int screen;
Window root;
XVisualInfo *xvi;
int fbcount;
GLXFBConfig *fbconfiglist, fbconfig;
int i;
const int glx_attribs[] = {
GLX_X_RENDERABLE, True,
GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
GLX_RENDER_TYPE, GLX_RGBA_BIT,
GLX_X_VISUAL_TYPE, GLX_TRUE_COLOR,
GLX_ALPHA_SIZE, 8,
GLX_DEPTH_SIZE, 1,
GLX_DOUBLEBUFFER, True,
None
};
static int ctx_attribs[] = {
#if USE_GLES2
GLX_CONTEXT_MAJOR_VERSION_ARB, 2,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_ES2_PROFILE_BIT_EXT,
#else
GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
GLX_CONTEXT_MINOR_VERSION_ARB, 0,
GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
/* GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB, */
#endif
None
};
dpy = XOpenDisplay(NULL);
if (!dpy)
return false;
wm_protocols = XInternAtom(dpy, "WM_PROTOCOLS", False);
wm_delete_window = XInternAtom(dpy, "WM_DELETE_WINDOW", 0);
screen = DefaultScreen(dpy);
root = RootWindow(dpy, screen);
fbconfiglist = glXChooseFBConfig(dpy, screen, glx_attribs, &fbcount);
if (fbcount <= 0) {
pr_err("No valid FB configurations");
return 1;
}
for (i = 0; i < fbcount; i++) {
xvi = glXGetVisualFromFBConfig(dpy, fbconfiglist[i]);
if (!xvi)
continue;
fbconfig = fbconfiglist[i];
goto found_fbconfig;
}
pr_err("No valid FB configurations");
return 1;
found_fbconfig:
XFree(fbconfiglist);
XSetWindowAttributes wattr;
wattr.event_mask = StructureNotifyMask | KeyPressMask;
wattr.background_pixmap = None;
wattr.background_pixel = 0;
wattr.border_pixel = 0;
wattr.colormap = XCreateColormap(dpy, root, xvi->visual, AllocNone);
win = XCreateWindow(dpy, root,
(DisplayWidth(dpy, screen) - width) / 2, (DisplayHeight(dpy, screen) - height) / 2,
width, height, 0, xvi->depth, InputOutput, xvi->visual,
CWBackPixmap | CWBorderPixel | CWColormap | CWEventMask, &wattr);
if (!win) {
pr_err("Unable to create window");
return false;
}
/* setup various window manager(WM) metadata */
if (title)
XStoreName(dpy, win, title);
XSizeHints sizehints;
sizehints.flags = PPosition | PBaseSize | PMinSize | PMaxSize | PResizeInc | PAspect;
sizehints.x = 200;
sizehints.y = 100;
sizehints.base_width = width;
sizehints.base_height = height;
sizehints.min_width = width / 8;
sizehints.min_height = height / 8;
sizehints.max_width = width * 8 ;
sizehints.max_height = height * 8;
sizehints.width_inc = 16;
sizehints.height_inc = 16;
sizehints.min_aspect.x = width;
sizehints.min_aspect.y = height;
sizehints.max_aspect.x = width;
sizehints.max_aspect.y = height;
XSetWMNormalHints(dpy, win, &sizehints );
XSetWMProtocols(dpy, win, &wm_delete_window, 1);
/* make a temporary context to find glXCreateContextAttribsARB() */
GLXContext ctx_tmp = glXCreateContext(dpy, xvi, 0, True);
if (!ctx_tmp) {
pr_err("Failed to allocate legacy GL context!");
goto failed;
}
glXMakeCurrent(dpy, win, ctx_tmp);
PFNGLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB =
(PFNGLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte*)"glXCreateContextAttribsARB");
if (!glXCreateContextAttribsARB) {
pr_err("Failed to bind glXCreateContextAttribsARB!");
glXMakeCurrent(dpy, None, 0);
glXDestroyContext(dpy, ctx_tmp);
goto failed_destroy_context;
}
glXMakeCurrent(dpy, None, 0);
glXDestroyContext(dpy, ctx_tmp);
/* now that we have glXCreateContextAttribsARB, we can make the real context */
ctx = glXCreateContextAttribsARB(dpy, fbconfig, 0, True, ctx_attribs);
if (!ctx) {
pr_err("Failed to allocate GL context!");
goto failed;
}
XSync(dpy, False);
glXMakeCurrent(dpy, win, ctx);
pr_info("GL_VERSION=%s", glGetString(GL_VERSION));
pr_info("GL_RENDERER=%s", glGetString(GL_RENDERER));
#if 0 // not supported/broken on one of my systems
GLint gl_major = 0, gl_minor = 0;
glGetIntegerv(GL_MAJOR_VERSION, &gl_major);
glerr("GL_MAJOR_VERSION");
glGetIntegerv(GL_MINOR_VERSION, &gl_minor);
inf("GL_VERSION_MAJOR=%d GL_VERSION_MINOR=%d", (int)gl_major, (int)gl_minor);
#endif
PFNGLXSWAPINTERVALEXTPROC glXSwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC)glXGetProcAddress((const GLubyte*)"glXSwapIntervalEXT");
if (!glXSwapIntervalEXT) {
pr_err("Failed to bind glXCreateContextAttribsARB!");
goto failed_destroy_context;
}
glXSwapIntervalEXT(dpy, win, 1);
/* done - we can show the window */
XMapRaised(dpy, win);
XFlush(dpy);
/* report to the game that we are ready */
game_initialize();
return true;
failed_destroy_context:
glXMakeCurrent(dpy, None, 0);
glXDestroyContext(dpy, ctx);
failed:
XDestroyWindow(dpy, win);
return false;
}