4 #include "SDL_opengl.h"
11 SDL_Init(SDL_INIT_VIDEO);
12 m_window = SDL_CreateWindow("IPDF", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
13 800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
17 Fatal("Couldn't create window!");
20 m_gl_context = SDL_GL_CreateContext(m_window);
22 ResizeViewport(800, 600);
32 SDL_GL_DeleteContext(m_gl_context);
33 SDL_DestroyWindow(m_window);
37 void Screen::Clear(float r, float g, float b, float a)
39 glClearColor(r,g,b,a);
40 glClear(GL_COLOR_BUFFER_BIT);
44 void Screen::ResizeViewport(int width, int height)
46 glViewport(0, 0, width, height);
47 m_viewport_width = width;
48 m_viewport_height = height;
51 bool Screen::PumpEvents()
54 bool no_quit_requested = true;
55 while (SDL_PollEvent(&evt))
60 no_quit_requested = false;
63 switch (evt.window.event)
65 case SDL_WINDOWEVENT_RESIZED:
66 case SDL_WINDOWEVENT_SIZE_CHANGED:
67 ResizeViewport(evt.window.data1, evt.window.data2);
72 m_last_mouse_x = evt.motion.x;
73 m_last_mouse_y = evt.motion.y;
76 m_mouse_handler(evt.motion.x, evt.motion.y,evt.motion.state, 0);
79 case SDL_MOUSEBUTTONDOWN:
80 case SDL_MOUSEBUTTONUP:
81 m_last_mouse_x = evt.button.x;
82 m_last_mouse_y = evt.button.y;
85 m_mouse_handler(evt.button.x, evt.button.y, evt.button.state, 0);
91 m_mouse_handler(m_last_mouse_x, m_last_mouse_y, 0, evt.wheel.y);
96 Debug("Key %c down", (char)evt.key.keysym.sym);
97 if (isalnum((char)evt.key.keysym.sym))
99 char filename[] = "0.bmp";
100 filename[0] = (char)evt.key.keysym.sym;
101 ScreenShot(filename);
108 return no_quit_requested;
111 void Screen::SetMouseCursor(Screen::MouseCursors cursor)
113 SDL_SystemCursor system_cursor_id = SDL_SYSTEM_CURSOR_ARROW;
116 case CursorArrow: system_cursor_id = SDL_SYSTEM_CURSOR_ARROW; break;
117 case CursorWait: system_cursor_id = SDL_SYSTEM_CURSOR_WAIT; break;
118 case CursorWaitArrow: system_cursor_id = SDL_SYSTEM_CURSOR_WAITARROW; break;
119 case CursorMove: system_cursor_id = SDL_SYSTEM_CURSOR_SIZEALL; break;
120 case CursorHand: system_cursor_id = SDL_SYSTEM_CURSOR_HAND; break;
123 SDL_Cursor *system_cursor = SDL_CreateSystemCursor(system_cursor_id);
124 SDL_SetCursor(system_cursor);
125 //TODO: Check if we need to free the system cursors.
128 void Screen::Present()
130 SDL_GL_SwapWindow(m_window);
133 void Screen::ScreenShot(const char * filename) const
135 Debug("Attempting to save BMP to file %s", filename);
137 int w = ViewportWidth();
138 int h = ViewportHeight();
139 unsigned char * pixels = new unsigned char[w*h*4];
141 Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4);
142 glReadBuffer(GL_FRONT);
143 glPixelStorei(GL_PACK_ALIGNMENT, 1);
144 for (int y = 0; y < h; ++y)
146 glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]);
149 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
150 SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0x000000ff,0x0000ff00,0x00ff0000,0xff000000);
152 SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0xff000000,0x00ff0000,0x0000ff00,0x000000ff);
155 Fatal("Failed to create SDL_Surface from pixel data - %s", SDL_GetError());
157 GLenum texture_format = (surf->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
158 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);
160 if (SDL_SaveBMP(surf, filename) != 0)
161 Fatal("SDL_SaveBMP failed - %s", SDL_GetError());
163 SDL_FreeSurface(surf);
170 * NOT PART OF THE DOCUMENT FORMAT
172 void Screen::RenderBMP(const char * filename) const
174 SDL_Surface * bmp = SDL_LoadBMP(filename);
176 Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError());
181 GLenum texture_format;
182 switch (bmp->format->BytesPerPixel)
184 case 4: //contains alpha
185 texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
187 case 3: //does not contain alpha
188 texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR;
191 Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel);
195 //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);
199 glEnable(GL_TEXTURE_2D);
200 glGenTextures(1, &texID);
201 glBindTexture(GL_TEXTURE_2D, texID);
203 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
204 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
205 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
206 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
208 glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels);
210 glMatrixMode(GL_PROJECTION);
212 glOrtho(0.0, 1.0, 1.0, 0.0, -1.f, 1.f);
213 glMatrixMode(GL_MODELVIEW);
217 glTexCoord2i(0,0); glVertex2f(0,0);
218 glTexCoord2i(1,0); glVertex2f(1,0);
219 glTexCoord2i(1,1); glVertex2f(1,1);
220 glTexCoord2i(0,1); glVertex2f(0,1);
223 glDisable(GL_TEXTURE_2D);
224 SDL_FreeSurface(bmp);
227 void Screen::DebugFontInit(const char *name, float font_size)
229 unsigned char font_atlas_data[1024*1024];
230 FILE *font_file = fopen(name, "rb");
231 fseek(font_file, 0, SEEK_END);
232 size_t font_file_size = ftell(font_file);
233 fseek(font_file, 0, SEEK_SET);
234 unsigned char *font_file_data = (unsigned char*)malloc(font_file_size);
235 fread(font_file_data, 1, font_file_size, font_file);
237 stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects);
238 free(font_file_data);
239 glGenTextures(1, &m_debug_font_atlas);
240 glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
241 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1024,1024, 0, GL_ALPHA, GL_UNSIGNED_BYTE, font_atlas_data);
242 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
243 m_debug_font_size = font_size;
246 void Screen::DebugFontClear()
248 m_debug_font_x = m_debug_font_y = 0;
249 DebugFontPrint("\n");
252 void Screen::DebugFontPrint(const char* str)
254 glMatrixMode(GL_PROJECTION);
257 glOrtho(0,ViewportWidth(), ViewportHeight(), 0, -1, 1);
258 glMatrixMode(GL_MODELVIEW);
264 glEnable(GL_TEXTURE_2D);
266 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
267 glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
270 if (*str >= 32 && *str < 128) {
271 stbtt_aligned_quad q;
272 stbtt_GetBakedQuad(m_debug_font_rects, 1024,1024, *str-32, &m_debug_font_x,&m_debug_font_y,&q,1);
273 glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0);
274 glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0);
275 glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1);
276 glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1);
278 else if (*str == '\n')
281 m_debug_font_y += m_debug_font_size;
287 glDisable(GL_TEXTURE_2D);
289 glMatrixMode(GL_MODELVIEW);
293 void Screen::DebugFontPrintF(const char *fmt, ...)
298 vsnprintf(buffer, BUFSIZ, fmt,va);
300 DebugFontPrint(buffer);