4 #include "SDL_opengl.h"
5 #include <fcntl.h> // for access(2)
6 #include <unistd.h> // for access(2)
13 SDL_Init(SDL_INIT_VIDEO);
14 m_window = SDL_CreateWindow("IPDF", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED,
15 800, 600, SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
19 Fatal("Couldn't create window!");
22 m_gl_context = SDL_GL_CreateContext(m_window);
24 ResizeViewport(800, 600);
34 SDL_GL_DeleteContext(m_gl_context);
35 SDL_DestroyWindow(m_window);
39 void Screen::Clear(float r, float g, float b, float a)
41 glClearColor(r,g,b,a);
42 glClear(GL_COLOR_BUFFER_BIT);
46 void Screen::ResizeViewport(int width, int height)
48 glViewport(0, 0, width, height);
49 m_viewport_width = width;
50 m_viewport_height = height;
53 bool Screen::PumpEvents()
56 bool no_quit_requested = true;
57 while (SDL_PollEvent(&evt))
62 no_quit_requested = false;
65 switch (evt.window.event)
67 case SDL_WINDOWEVENT_RESIZED:
68 case SDL_WINDOWEVENT_SIZE_CHANGED:
69 ResizeViewport(evt.window.data1, evt.window.data2);
74 m_last_mouse_x = evt.motion.x;
75 m_last_mouse_y = evt.motion.y;
78 m_mouse_handler(evt.motion.x, evt.motion.y,evt.motion.state, 0);
81 case SDL_MOUSEBUTTONDOWN:
82 case SDL_MOUSEBUTTONUP:
83 m_last_mouse_x = evt.button.x;
84 m_last_mouse_y = evt.button.y;
87 m_mouse_handler(evt.button.x, evt.button.y, evt.button.state?evt.button.button:0, 0);
93 m_mouse_handler(m_last_mouse_x, m_last_mouse_y, 0, evt.wheel.y);
98 Debug("Key %c down", (char)evt.key.keysym.sym);
99 if (isalnum((char)evt.key.keysym.sym))
101 char filename[] = "0.bmp";
102 filename[0] = (char)evt.key.keysym.sym;
103 ScreenShot(filename);
111 return no_quit_requested;
114 void Screen::SetMouseCursor(Screen::MouseCursors cursor)
116 SDL_SystemCursor system_cursor_id = SDL_SYSTEM_CURSOR_ARROW;
119 case CursorArrow: system_cursor_id = SDL_SYSTEM_CURSOR_ARROW; break;
120 case CursorWait: system_cursor_id = SDL_SYSTEM_CURSOR_WAIT; break;
121 case CursorWaitArrow: system_cursor_id = SDL_SYSTEM_CURSOR_WAITARROW; break;
122 case CursorMove: system_cursor_id = SDL_SYSTEM_CURSOR_SIZEALL; break;
123 case CursorHand: system_cursor_id = SDL_SYSTEM_CURSOR_HAND; break;
126 SDL_Cursor *system_cursor = SDL_CreateSystemCursor(system_cursor_id);
127 SDL_SetCursor(system_cursor);
128 //TODO: Check if we need to free the system cursors.
131 void Screen::Present()
133 SDL_GL_SwapWindow(m_window);
136 void Screen::ScreenShot(const char * filename) const
138 Debug("Attempting to save BMP to file %s", filename);
140 int w = ViewportWidth();
141 int h = ViewportHeight();
142 unsigned char * pixels = new unsigned char[w*h*4];
144 Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4);
146 for (int y = 0; y < h; ++y)
148 glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]);
151 #if SDL_BYTEORDER == SDL_LIL_ENDIAN
152 SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0x000000ff,0x0000ff00,0x00ff0000,0xff000000);
154 SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0xff000000,0x00ff0000,0x0000ff00,0x000000ff);
157 Fatal("Failed to create SDL_Surface from pixel data - %s", SDL_GetError());
159 GLenum texture_format = (surf->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
160 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);
162 if (SDL_SaveBMP(surf, filename) != 0)
163 Fatal("SDL_SaveBMP failed - %s", SDL_GetError());
165 SDL_FreeSurface(surf);
172 * NOT PART OF THE DOCUMENT FORMAT
174 void Screen::RenderBMP(const char * filename) const
176 if (access(filename, R_OK) == -1)
178 Error("No such file \"%s\" - Nothing to render - You might have done this deliberately?", filename);
181 SDL_Surface * bmp = SDL_LoadBMP(filename);
183 Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError());
188 GLenum texture_format;
189 switch (bmp->format->BytesPerPixel)
191 case 4: //contains alpha
192 texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA;
194 case 3: //does not contain alpha
195 texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR;
198 Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel);
202 //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);
206 glEnable(GL_TEXTURE_2D);
207 glGenTextures(1, &texID);
208 glBindTexture(GL_TEXTURE_2D, texID);
210 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
211 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
212 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
213 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
215 glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels);
217 glMatrixMode(GL_PROJECTION);
219 glOrtho(0.0, 1.0, 1.0, 0.0, -1.f, 1.f);
220 glMatrixMode(GL_MODELVIEW);
224 glTexCoord2i(0,0); glVertex2f(0,0);
225 glTexCoord2i(1,0); glVertex2f(1,0);
226 glTexCoord2i(1,1); glVertex2f(1,1);
227 glTexCoord2i(0,1); glVertex2f(0,1);
230 glDisable(GL_TEXTURE_2D);
231 SDL_FreeSurface(bmp);
234 void Screen::DebugFontInit(const char *name, float font_size)
236 unsigned char font_atlas_data[1024*1024];
237 FILE *font_file = fopen(name, "rb");
238 fseek(font_file, 0, SEEK_END);
239 size_t font_file_size = ftell(font_file);
240 fseek(font_file, 0, SEEK_SET);
241 unsigned char *font_file_data = (unsigned char*)malloc(font_file_size);
242 fread(font_file_data, 1, font_file_size, font_file);
244 stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects);
245 free(font_file_data);
246 glGenTextures(1, &m_debug_font_atlas);
247 glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
248 glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1024,1024, 0, GL_ALPHA, GL_UNSIGNED_BYTE, font_atlas_data);
249 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
250 m_debug_font_size = font_size;
253 void Screen::DebugFontClear()
255 m_debug_font_x = m_debug_font_y = 0;
256 DebugFontPrint("\n");
259 void Screen::DebugFontPrint(const char* str)
261 glMatrixMode(GL_PROJECTION);
264 glOrtho(0,ViewportWidth(), ViewportHeight(), 0, -1, 1);
265 glMatrixMode(GL_MODELVIEW);
271 glEnable(GL_TEXTURE_2D);
273 glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
274 glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas);
277 if (*str >= 32 && *str < 128) {
278 stbtt_aligned_quad q;
279 stbtt_GetBakedQuad(m_debug_font_rects, 1024,1024, *str-32, &m_debug_font_x,&m_debug_font_y,&q,1);
280 glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0);
281 glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0);
282 glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1);
283 glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1);
285 else if (*str == '\n')
288 m_debug_font_y += m_debug_font_size;
294 glDisable(GL_TEXTURE_2D);
296 glMatrixMode(GL_PROJECTION);
300 void Screen::DebugFontPrintF(const char *fmt, ...)
305 vsnprintf(buffer, BUFSIZ, fmt,va);
307 DebugFontPrint(buffer);