X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fscreen.cpp;h=09cd0b56a35fcb25a2f21eec2eb097596cb825b5;hp=624e55dd138243d87600d24ec8f362ab3880da57;hb=700f1449af19115ff2bbe50ad67ea7c73f9aa5cd;hpb=07db15ca49833542130f7c29c6a6dc7560fab59d diff --git a/src/screen.cpp b/src/screen.cpp index 624e55d..09cd0b5 100644 --- a/src/screen.cpp +++ b/src/screen.cpp @@ -18,9 +18,13 @@ Screen::Screen() } m_gl_context = SDL_GL_CreateContext(m_window); - + ResizeViewport(800, 600); + Clear(); + Present(); + + } Screen::~Screen() @@ -30,6 +34,13 @@ Screen::~Screen() SDL_Quit(); } +void Screen::Clear(float r, float g, float b, float a) +{ + glClearColor(r,g,b,a); + glClear(GL_COLOR_BUFFER_BIT); + DebugFontClear(); +} + void Screen::ResizeViewport(int width, int height) { glViewport(0, 0, width, height); @@ -128,13 +139,24 @@ void Screen::ScreenShot(const char * filename) const unsigned char * pixels = new unsigned char[w*h*4]; if (pixels == NULL) Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4); + glReadBuffer(GL_FRONT); + glPixelStorei(GL_PACK_ALIGNMENT, 1); + for (int y = 0; y < h; ++y) + { + glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]); + } - glReadPixels(0,0,w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels); - - SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0,0,0,0); +#if SDL_BYTEORDER == SDL_LIL_ENDIAN + SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0x000000ff,0x0000ff00,0x00ff0000,0xff000000); +#else + SDL_Surface * surf = SDL_CreateRGBSurfaceFrom(pixels, w, h, 8*4, w*4, 0xff000000,0x00ff0000,0x0000ff00,0x000000ff); +#endif if (surf == NULL) Fatal("Failed to create SDL_Surface from pixel data - %s", SDL_GetError()); + GLenum texture_format = (surf->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA; + 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); + if (SDL_SaveBMP(surf, filename) != 0) Fatal("SDL_SaveBMP failed - %s", SDL_GetError()); @@ -169,28 +191,111 @@ void Screen::RenderBMP(const char * filename) const Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel); break; } - 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); + //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); - GLuint texID; + GLuint texID; + glEnable(GL_TEXTURE_2D); glGenTextures(1, &texID); glBindTexture(GL_TEXTURE_2D, texID); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + glTexImage2D(GL_TEXTURE_2D, 0, bmp->format->BytesPerPixel, w, h, 0, texture_format, GL_UNSIGNED_BYTE, bmp->pixels); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); - glEnable(GL_TEXTURE_2D); - glBindTexture(GL_TEXTURE_2D, texID); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glOrtho(0.0, 1.0, 1.0, 0.0, -1.f, 1.f); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); glBegin(GL_QUADS); - glTexCoord2i(0,0); glVertex2f(-0.5f*w, -0.5f*h); - glTexCoord2i(1,0); glVertex2f(0.5f*w, -0.5f*h); - glTexCoord2i(1,1); glVertex2f(0.5f*w, 0.5f*h); - glTexCoord2i(0,1); glVertex2f(-0.5*w,0.5*h); + glTexCoord2i(0,0); glVertex2f(0,0); + glTexCoord2i(1,0); glVertex2f(1,0); + glTexCoord2i(1,1); glVertex2f(1,1); + glTexCoord2i(0,1); glVertex2f(0,1); glEnd(); glDisable(GL_TEXTURE_2D); + SDL_FreeSurface(bmp); +} + +void Screen::DebugFontInit(const char *name, float font_size) +{ + unsigned char font_atlas_data[1024*1024]; + FILE *font_file = fopen(name, "rb"); + fseek(font_file, 0, SEEK_END); + size_t font_file_size = ftell(font_file); + fseek(font_file, 0, SEEK_SET); + unsigned char *font_file_data = (unsigned char*)malloc(font_file_size); + fread(font_file_data, 1, font_file_size, font_file); + fclose(font_file); + stbtt_BakeFontBitmap(font_file_data,0, font_size, font_atlas_data,1024,1024, 32,96, m_debug_font_rects); + free(font_file_data); + glGenTextures(1, &m_debug_font_atlas); + glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas); + glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 1024,1024, 0, GL_ALPHA, GL_UNSIGNED_BYTE, font_atlas_data); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + m_debug_font_size = font_size; +} + +void Screen::DebugFontClear() +{ + m_debug_font_x = m_debug_font_y = 0; + DebugFontPrint("\n"); +} + +void Screen::DebugFontPrint(const char* str) +{ + glMatrixMode(GL_PROJECTION); + glPushMatrix(); + glLoadIdentity(); + glOrtho(0,ViewportWidth(), ViewportHeight(), 0, -1, 1); + glMatrixMode(GL_MODELVIEW); + glPushMatrix(); + glLoadIdentity(); + + + + glEnable(GL_TEXTURE_2D); + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glBindTexture(GL_TEXTURE_2D, m_debug_font_atlas); + glBegin(GL_QUADS); + while (*str) { + if (*str >= 32 && *str < 128) { + stbtt_aligned_quad q; + stbtt_GetBakedQuad(m_debug_font_rects, 1024,1024, *str-32, &m_debug_font_x,&m_debug_font_y,&q,1); + glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0); + glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0); + glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1); + glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1); + } + else if (*str == '\n') + { + m_debug_font_x = 0; + m_debug_font_y += m_debug_font_size; + } + ++str; + } + glEnd(); + glDisable(GL_BLEND); + glDisable(GL_TEXTURE_2D); + glPopMatrix(); + glMatrixMode(GL_MODELVIEW); + glPopMatrix(); +} - //SDL_FreeSurface(bmp); +void Screen::DebugFontPrintF(const char *fmt, ...) +{ + char buffer[BUFSIZ]; + va_list va; + va_start(va, fmt); + vsnprintf(buffer, BUFSIZ, fmt,va); + va_end(va); + DebugFontPrint(buffer); }