src/screen.cpp

   1 #include "common.h"
   2 #include "screen.h"
   3
   4 #include "gl_core44.h"
   5 #include <fcntl.h> // for access(2)
   6 #include <unistd.h> // for access(2)
   7
   8 #include "bufferbuilder.h"
   9 #include "shaderprogram.h"
  10
  11 #define BASICTEX_VERT "shaders/basictex_vert.glsl"
  12 #define BASICTEX_FRAG "shaders/basictex_frag.glsl"
  13
  14 using namespace IPDF;
  15 using namespace std;
  16
  17 static void opengl_debug_callback(GLenum source, GLenum type, GLuint id, GLenum severity, GLsizei length, const GLchar* msg, const void *data)
  18 {
  19         // Don't print out gl Errors we generated.
  20         if (source == GL_DEBUG_SOURCE_APPLICATION) return;
  21         //Error("OpenGL Error (%d): %s", id, msg);
  22         // Spams this message on fglrx, disabling for now because it's damn annoying.
  23         // ERROR: opengl_debug_callback (screen.cpp:21) - OpenGL Error (1011): glObjectLabel failed because (depending on the operation) a referenced binding point is empty; a referenced name is not the name of an object; or the given name is otherwise not valid to this operation (GL_INVALID_VALUE)
  24 }
  25
  26
  27 Screen::Screen()
  28 {
  29
  30         SDL_Init(SDL_INIT_VIDEO);
  31         m_window = SDL_CreateWindow("IPDF", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
  32                         800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
  33
  34         if (!m_window)
  35         {
  36                 Fatal("Couldn't create window!");
  37         }
  38
  39         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
  40         SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1);
  41         SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS, SDL_GL_CONTEXT_DEBUG_FLAG);
  42         SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
  43
  44         m_gl_context = SDL_GL_CreateContext(m_window);
  45
  46         ogl_LoadFunctions();
  47
  48         // Why is this so horribly broken?
  49         if (ogl_IsVersionGEQ(3,0))
  50         {
  51                 Fatal("We require OpenGL 3.1, but you have version %d.%d!",ogl_GetMajorVersion(), ogl_GetMinorVersion());
  52         }
  53
  54         if (!SDL_GL_ExtensionSupported("GL_ARB_shading_language_420pack"))
  55         {
  56                 Fatal("Your system does not support the ARB_shading_language_420pack extension, which is required.");
  57         }
  58
  59         if (!SDL_GL_ExtensionSupported("GL_ARB_explicit_attrib_location"))
  60         {
  61                 Fatal("Your system does not support the ARB_explicit_attrib_location extension, which is required.");
  62         }
  63
  64         m_frame_begin_time = SDL_GetPerformanceCounter();
  65         m_last_frame_time = 0;
  66         m_last_frame_gpu_timer = 0;
  67         glGenQueries(1, &m_frame_gpu_timer);
  68         glBeginQuery(GL_TIME_ELAPSED, m_frame_gpu_timer);
  69
  70         glDebugMessageCallback(opengl_debug_callback, 0);
  71
  72         GLuint default_vao;
  73         glGenVertexArrays(1, &default_vao);
  74         glBindVertexArray(default_vao);
  75
  76         m_texture_prog.InitialiseShaders(BASICTEX_VERT, BASICTEX_FRAG);
  77         m_texture_prog.Use();
  78
  79         // We always want to use the texture bound to texture unit 0.
  80         GLint texture_uniform_location = m_texture_prog.GetUniformLocation("tex");
  81         glUniform1i(texture_uniform_location, 0);
  82
  83         m_font_prog.InitialiseShaders(BASICTEX_VERT, "shaders/fonttex_frag.glsl");
  84         m_font_prog.Use();
  85
  86         // We always want to use the texture bound to texture unit 0.
  87         GLint font_texture_uniform_location = m_font_prog.GetUniformLocation("tex");
  88         glUniform1i(font_texture_uniform_location, 0);
  89         m_colour_uniform_location = m_font_prog.GetUniformLocation("colour");
  90
  91         m_viewport_ubo.SetUsage(GraphicsBuffer::BufferUsageDynamicDraw);
  92         m_viewport_ubo.SetType(GraphicsBuffer::BufferTypeUniform);
  93
  94         m_debug_font_atlas = 0;
  95         m_no_quit_requested = true;
  96         m_view = NULL;
  97         ResizeViewport(800, 600);
  98
  99         Clear();
 100         Present();
 101
 102
 103 }
 104
 105 Screen::~Screen()
 106 {
 107         SDL_GL_DeleteContext(m_gl_context);
 108         SDL_DestroyWindow(m_window);
 109         SDL_Quit();
 110 }
 111
 112 void Screen::Clear(float r, float g, float b, float a)
 113 {
 114         glClearColor(r,g,b,a);
 115         glClear(GL_COLOR_BUFFER_BIT);
 116         DebugFontClear();
 117 }
 118
 119 void Screen::ResizeViewport(int width, int height)
 120 {
 121         glViewport(0, 0, width, height);
 122         m_viewport_width = width;
 123         m_viewport_height = height;
 124         GLfloat viewportfloats[] = {(float)width, (float)height};
 125         m_viewport_ubo.Upload(sizeof(float)*2, viewportfloats);
 126 }
 127
 128 bool Screen::PumpEvents()
 129 {
 130         SDL_Event evt;
 131
 132         while (SDL_PollEvent(&evt))
 133         {
 134                 switch (evt.type)
 135                 {
 136                 case SDL_QUIT:
 137                         m_no_quit_requested = false;
 138                         break;
 139                 case SDL_WINDOWEVENT:
 140                         switch (evt.window.event)
 141                         {
 142                         case SDL_WINDOWEVENT_RESIZED:
 143                         case SDL_WINDOWEVENT_SIZE_CHANGED:
 144                                 ResizeViewport(evt.window.data1, evt.window.data2);
 145                                 break;
 146                         }
 147                         break;
 148                 case SDL_MOUSEMOTION:
 149                         m_last_mouse_x = evt.motion.x;
 150                         m_last_mouse_y = evt.motion.y;
 151                         if (m_mouse_handler)
 152                         {
 153                                 m_mouse_handler(evt.motion.x, evt.motion.y,evt.motion.state, 0, this, m_view);
 154                         }
 155                         break;
 156                 case SDL_MOUSEBUTTONDOWN:
 157                 case SDL_MOUSEBUTTONUP:
 158                         m_last_mouse_x = evt.button.x;
 159                         m_last_mouse_y = evt.button.y;
 160                         if (m_mouse_handler)
 161                         {
 162                                 m_mouse_handler(evt.button.x, evt.button.y, evt.button.state?evt.button.button:0, 0, this, m_view);
 163                         }
 164                         break;
 165                 case SDL_MOUSEWHEEL:
 166                         if (m_mouse_handler)
 167                         {
 168                                 m_mouse_handler(m_last_mouse_x, m_last_mouse_y, 0, evt.wheel.y, this, m_view);
 169                         }
 170                         break;
 171                 case SDL_KEYDOWN:
 172                 {
 173                         Debug("Key %c down", (char)evt.key.keysym.sym);
 174                         if (isalnum((char)evt.key.keysym.sym))
 175                         {
 176                                 char filename[] = "0.bmp";
 177                                 filename[0] = (char)evt.key.keysym.sym;
 178                                 ScreenShot(filename);
 179                         }
 180                         break;
 181                 }
 182                 default:
 183                         break;
 184                 }
 185         }
 186         return m_no_quit_requested;
 187 }
 188
 189 void Screen::SetMouseCursor(Screen::MouseCursors cursor)
 190 {
 191         SDL_SystemCursor system_cursor_id = SDL_SYSTEM_CURSOR_ARROW;
 192         switch (cursor)
 193         {
 194         case CursorArrow: system_cursor_id = SDL_SYSTEM_CURSOR_ARROW; break;
 195         case CursorWait: system_cursor_id = SDL_SYSTEM_CURSOR_WAIT; break;
 196         case CursorWaitArrow: system_cursor_id = SDL_SYSTEM_CURSOR_WAITARROW; break;
 197         case CursorMove: system_cursor_id = SDL_SYSTEM_CURSOR_SIZEALL; break;
 198         case CursorHand: system_cursor_id = SDL_SYSTEM_CURSOR_HAND; break;
 199         default: break;
 200         }
 201         SDL_Cursor *system_cursor = SDL_CreateSystemCursor(system_cursor_id);
 202         SDL_SetCursor(system_cursor);
 203         //TODO: Check if we need to free the system cursors.
 204 }
 205
 206 void Screen::Present()
 207 {
 208         if (m_debug_font_atlas)
 209                 DebugFontFlush();
 210         m_last_frame_time = SDL_GetPerformanceCounter() - m_frame_begin_time;
 211         glEndQuery(GL_TIME_ELAPSED);
 212         SDL_GL_SwapWindow(m_window);
 213         m_frame_begin_time = SDL_GetPerformanceCounter();
 214         if (m_last_frame_gpu_timer)
 215                 glDeleteQueries(1, &m_last_frame_gpu_timer);
 216         m_last_frame_gpu_timer = m_frame_gpu_timer;
 217         glGenQueries(1, &m_frame_gpu_timer);
 218         glBeginQuery(GL_TIME_ELAPSED, m_frame_gpu_timer);
 219 }
 220
 221 double Screen::GetLastFrameTimeGPU() const
 222 {
 223         if (!m_last_frame_gpu_timer)
 224                 return 0;
 225         uint64_t frame_time_ns;
 226         glGetQueryObjectui64v(m_last_frame_gpu_timer, GL_QUERY_RESULT, &frame_time_ns);
 227         return frame_time_ns/1000000000.0;
 228 }
 229
 230 void Screen::RenderPixels(int x, int y, int w, int h, uint8_t *pixels) const
 231 {
 232         GLenum texture_format = GL_RGBA;
 233
 234         m_texture_prog.Use();
 235         GraphicsBuffer quad_vertex_buffer;
 236         quad_vertex_buffer.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 237         quad_vertex_buffer.SetType(GraphicsBuffer::BufferTypeVertex);
 238         //rectangular texture == 2 triangles
 239         GLfloat quad[] = {
 240                 0, 0, (float)x, (float)y,
 241                 1, 0, (float)(x+w), (float)y,
 242                 0, 1, (float)x, (float)(y+h),
 243                 1, 1, (float)(x+w), (float)(y+h)
 244         };
 245         quad_vertex_buffer.Upload(sizeof(GLfloat) * 16, quad);
 246         quad_vertex_buffer.Bind();
 247         m_viewport_ubo.Bind();
 248
 249         glUniform4f(m_colour_uniform_location, 1.0f, 1.0f, 1.0f, 1.0f);
 250
 251         GLuint texID;
 252         glGenTextures(1, &texID);
 253         glBindTexture(GL_TEXTURE_2D, texID);
 254
 255         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 256         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 257         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 258         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 259
 260         glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, texture_format, GL_UNSIGNED_BYTE, pixels);
 261
 262         glEnableVertexAttribArray(0);
 263         glEnableVertexAttribArray(1);
 264         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
 265         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
 266         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 267         glDisableVertexAttribArray(1);
 268         glDisableVertexAttribArray(0);
 269
 270 }
 271
 272 void Screen::ScreenShot(const char * filename) const
 273 {
 274         Debug("Attempting to save BMP to file %s", filename);
 275
 276         int w = ViewportWidth();
 277         int h = ViewportHeight();
 278         unsigned char * pixels = new unsigned char[w*h*4];
 279         if (pixels == NULL)
 280                 Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4);
 281
 282         for (int y = 0; y < h; ++y)
 283         {
 284                 glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]);
 285         }
 286
 287 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
 288         SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0x000000ff,0x0000ff00,0x00ff0000,0xff000000);
 289 #else
 290         SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0xff000000,0x00ff0000,0x0000ff00,0x000000ff);
 291 #endif
 292         if (surf == NULL)
 293                 Fatal("Failed to create SDL_Surface from pixel data - %s", SDL_GetError());
 294
 295         GLenum texture_format = (surf->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
 296         Debug("SDL_Surface %d BytesPerPixel, format %d (RGB = %d, BGR = %d, RGBA = %d, BGRA = %d)", surf->format->BytesPerPixel, texture_format, GL_RGB, GL_BGR, GL_RGBA, GL_BGRA);
 297
 298         if (SDL_SaveBMP(surf, filename) != 0)
 299                 Fatal("SDL_SaveBMP failed - %s", SDL_GetError());
 300
 301         SDL_FreeSurface(surf);
 302         delete [] pixels;
 303         Debug("Succeeded!");
 304 }
 305
 306 /**
 307  * Render a BMP
 308  * NOT PART OF THE DOCUMENT FORMAT
 309  */
 310 void Screen::RenderBMP(const char * filename) const
 311 {
 312         if (access(filename, R_OK) == -1)
 313         {
 314                 Error("No such file \"%s\" - Nothing to render - You might have done this deliberately?", filename);
 315                 return;
 316         }
 317         SDL_Surface * bmp = SDL_LoadBMP(filename);
 318         if (bmp == NULL)
 319                 Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError());
 320
 321         int w = bmp->w;
 322         int h = bmp->h;
 323
 324         GLenum texture_format = GL_RGBA;
 325         switch (bmp->format->BytesPerPixel)
 326         {
 327                 case 4: //contains alpha
 328                         texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
 329                         break;
 330                 case 3: //does not contain alpha
 331                         texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR;
 332                         break;
 333                 default:
 334                         Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel);
 335                         break;
 336         }
 337
 338         //Debug("SDL_Surface %d BytesPerPixel, format %d (RGB = %d, BGR = %d, RGBA = %d, BGRA = %d)", bmp->format->BytesPerPixel, texture_format, GL_RGB, GL_BGR, GL_RGBA, GL_BGRA);
 339
 340         m_texture_prog.Use();
 341         GraphicsBuffer quad_vertex_buffer;
 342         quad_vertex_buffer.SetUsage(GraphicsBuffer::BufferUsageStaticDraw);
 343         quad_vertex_buffer.SetType(GraphicsBuffer::BufferTypeVertex);
 344         GLfloat quad[] = {
 345                 0, 0, 0, 0,
 346                 1, 0, (float)ViewportWidth(), 0,
 347                 1, 1, (float)ViewportWidth(), (float)ViewportHeight(),
 348                 0, 1, 0, (float)ViewportHeight()
 349         };
 350         quad_vertex_buffer.Upload(sizeof(GLfloat) * 16, quad);
 351         quad_vertex_buffer.Bind();
 352         m_viewport_ubo.Bind();
 353
 354         glUniform4f(m_colour_uniform_location, 1.0f, 1.0f, 1.0f, 1.0f);
 355
 356         GLuint texID;
 357         glGenTextures(1, &texID);
 358         glBindTexture(GL_TEXTURE_2D, texID);
 359
 360         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 361         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 362         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 363         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 364
 365         glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels);
 366
 367         glEnableVertexAttribArray(0);
 368         glEnableVertexAttribArray(1);
 369         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
 370         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
 371         glDisableVertexAttribArray(1);
 372         glDisableVertexAttribArray(0);
 373         glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 374
 375         SDL_FreeSurface(bmp);
 376 }
 377
 378 void Screen::DebugFontInit(const char *name, float font_size)
 379 {
 380         unsigned char font_atlas_data[1024*1024];
 381         FILE *font_file = fopen(name, "rb");
 382         fseek(font_file, 0, SEEK_END);
 383         size_t font_file_size = ftell(font_file);
 384         fseek(font_file, 0, SEEK_SET);
 385         unsigned char *font_file_data = (unsigned char*)malloc(font_file_size);
 386         SDL_assert(fread(font_file_data, 1, font_file_size, font_file) == font_file_size);
 387         fclose(font_file);
 388         stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects);
 389         free(font_file_data);
 390         glGenTextures(1, &m_debug_font_atlas);
 391         glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
 392         glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, 1024,1024, 0, GL_RED, GL_UNSIGNED_BYTE, font_atlas_data);
 393         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 394         m_debug_font_size = font_size;
 395
 396         m_debug_font_vertices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 397         m_debug_font_vertices.SetType(GraphicsBuffer::BufferTypeVertex);
 398         m_debug_font_vertices.SetName("m_debug_font_vertices");
 399         m_debug_font_vertices.Upload(8192,NULL);
 400         m_debug_font_vertex_head = 0;
 401
 402         m_debug_font_indices.SetUsage(GraphicsBuffer::BufferUsageStreamDraw);
 403         m_debug_font_indices.SetType(GraphicsBuffer::BufferTypeIndex);
 404         m_debug_font_indices.SetName("m_debug_font_indices");
 405         m_debug_font_indices.Resize(500);
 406         m_debug_font_index_head = 0;
 407 }
 408
 409 void Screen::DebugFontClear()
 410 {
 411         m_debug_font_x = m_debug_font_y = 0;
 412         if (!m_debug_font_atlas) return;
 413         DebugFontPrint("\n");
 414 }
 415
 416 void Screen::DebugFontFlush()
 417 {
 418         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 40, -1, "Screen::DebugFontFlush()");
 419
 420         glEnable(GL_BLEND);
 421         glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 422         glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
 423
 424         m_font_prog.Use();
 425         m_viewport_ubo.Bind();
 426         m_debug_font_vertices.Bind();
 427         m_debug_font_indices.Bind();
 428         glUniform4f(m_colour_uniform_location, 0,0,0,1);
 429         glEnableVertexAttribArray(0);
 430         glEnableVertexAttribArray(1);
 431         glEnable(GL_PRIMITIVE_RESTART);
 432         glPrimitiveRestartIndex(65535);
 433         glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), 0);
 434         glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, 4*sizeof(float), (void*)(2*sizeof(float)));
 435         glDrawElements(GL_TRIANGLE_STRIP, m_debug_font_index_head, GL_UNSIGNED_SHORT, 0);
 436         glDisable(GL_PRIMITIVE_RESTART);
 437         glDisableVertexAttribArray(1);
 438         glDisableVertexAttribArray(0);
 439
 440         glDisable(GL_BLEND);
 441
 442         m_debug_font_vertices.Invalidate();
 443         m_debug_font_indices.Invalidate();
 444         m_debug_font_vertex_head = 0;
 445         m_debug_font_index_head = 0;
 446
 447         glPopDebugGroup();
 448 }
 449
 450 struct fontvertex
 451 {
 452         float x, y, s, t;
 453 };
 454
 455 void Screen::DebugFontPrint(const char* str)
 456 {
 457         if (!m_debug_font_atlas) return;
 458
 459         glPushDebugGroup(GL_DEBUG_SOURCE_APPLICATION, 41, -1, "Screen::DebugFontPrint()");
 460
 461         BufferBuilder<fontvertex> vertexData(m_debug_font_vertices.MapRange(m_debug_font_vertex_head*sizeof(float), m_debug_font_vertices.GetSize() - m_debug_font_vertex_head*sizeof(float), false, true, true), m_debug_font_vertices.GetSize() - m_debug_font_vertex_head*sizeof(float));
 462         BufferBuilder<uint16_t> indexData(m_debug_font_indices.MapRange(m_debug_font_index_head*sizeof(uint16_t), m_debug_font_indices.GetSize() - m_debug_font_index_head*sizeof(uint16_t), false, true, true), m_debug_font_indices.GetSize() - m_debug_font_index_head*sizeof(uint16_t));
 463
 464         size_t baseVertex = m_debug_font_vertex_head/4;
 465         while (*str) {
 466                 if (!vertexData.Free(4) || !indexData.Free(5))
 467                 {
 468                         m_debug_font_indices.UnMap();
 469                         m_debug_font_vertices.UnMap();
 470                         DebugFontFlush();
 471                         DebugFontPrint(str);
 472                         glPopDebugGroup();
 473                         return;
 474                 }
 475                 if (*str >= 32 && (unsigned char)(*str) < 128) {
 476                         stbtt_aligned_quad q;
 477                         stbtt_GetBakedQuad(m_debug_font_rects, 1024,1024, *str-32, &m_debug_font_x,&m_debug_font_y,&q,1);
 478                         size_t index = vertexData.Add({q.x0, q.y0, q.s0, q.t0});
 479                         index += baseVertex;
 480                         indexData.Add(index);
 481                         index = vertexData.Add({q.x1, q.y0, q.s1, q.t0});
 482                         index += baseVertex;
 483                         indexData.Add(index);
 484                         index = vertexData.Add({q.x0, q.y1, q.s0, q.t1});
 485                         index += baseVertex;
 486                         indexData.Add(index);
 487                         index = vertexData.Add({q.x1, q.y1, q.s1, q.t1});
 488                         index += baseVertex;
 489                         indexData.Add(index);
 490                         indexData.Add(65535);
 491
 492                         m_debug_font_vertex_head += 16;
 493                         m_debug_font_index_head += 5;
 494
 495                 }
 496                 else if (*str == '\n')
 497                 {
 498                         m_debug_font_x = 0;
 499                         m_debug_font_y += m_debug_font_size;
 500                 }
 501                 ++str;
 502         }
 503         m_debug_font_indices.UnMap();
 504         m_debug_font_vertices.UnMap();
 505         glPopDebugGroup();
 506         //DebugFontFlush();
 507 }
 508
 509 void Screen::DebugFontPrintF(const char *fmt, ...)
 510 {
 511         char buffer[BUFSIZ];
 512         va_list va;
 513         va_start(va, fmt);
 514         vsnprintf(buffer, BUFSIZ, fmt,va);
 515         va_end(va);
 516         DebugFontPrint(buffer);
 517 }