X-Git-Url: https://git.ucc.asn.au/?p=ipdf%2Fcode.git;a=blobdiff_plain;f=src%2Fscreen.cpp;h=5c3957c536dd29c88595d45712414da8b87f1935;hp=6293fab19b9934597bda23680b4b977ff1a85949;hb=5e19040b00e135ead52e535165e079ee72059727;hpb=d1f4d742e6634fda7c8a1e018b4f9c8ec0f4e51c diff --git a/src/screen.cpp b/src/screen.cpp index 6293fab..5c3957c 100644 --- a/src/screen.cpp +++ b/src/screen.cpp @@ -2,6 +2,8 @@ #include "screen.h" #include "SDL_opengl.h" +#include // for access(2) +#include // for access(2) using namespace IPDF; using namespace std; @@ -18,9 +20,13 @@ Screen::Screen() } m_gl_context = SDL_GL_CreateContext(m_window); - + ResizeViewport(800, 600); + Clear(); + Present(); + + } Screen::~Screen() @@ -30,6 +36,13 @@ 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); @@ -71,7 +84,7 @@ bool Screen::PumpEvents() m_last_mouse_y = evt.button.y; if (m_mouse_handler) { - m_mouse_handler(evt.button.x, evt.button.y, evt.button.state, 0); + m_mouse_handler(evt.button.x, evt.button.y, evt.button.state?evt.button.button:0, 0); } break; case SDL_MOUSEWHEEL: @@ -89,6 +102,7 @@ bool Screen::PumpEvents() filename[0] = (char)evt.key.keysym.sym; ScreenShot(filename); } + break; } default: break; @@ -122,47 +136,173 @@ void Screen::Present() void Screen::ScreenShot(const char * filename) const { Debug("Attempting to save BMP to file %s", filename); - SDL_Surface * info = SDL_GetWindowSurface(m_window); - if (info == NULL) - { - Fatal("Failed to create info surface from m_window - %s", SDL_GetError()); - } - - unsigned num_pix = info->w * info->h * info->format->BytesPerPixel; - unsigned char * pixels = new unsigned char[num_pix]; + + int w = ViewportWidth(); + int h = ViewportHeight(); + unsigned char * pixels = new unsigned char[w*h*4]; if (pixels == NULL) - { - Fatal("Failed to allocate %u pixel array - %s", num_pix, strerror(errno)); - } + Fatal("Failed to allocate %d x %d x 4 = %d pixel array", w, h, w*h*4); - SDL_Renderer * renderer = SDL_GetRenderer(m_window); - if (renderer == NULL) + for (int y = 0; y < h; ++y) { - Fatal("Couldn't get renderer from m_window - %s", SDL_GetError()); - } - if (SDL_RenderReadPixels(renderer, &(info->clip_rect), info->format->format, pixels, info->w * info->format->BytesPerPixel) != 0) - { - Fatal("SDL_RenderReadPixels failed - %s", SDL_GetError()); + glReadPixels(0,h-y-1,w, 1, GL_RGBA, GL_UNSIGNED_BYTE, &pixels[y*w*4]); } - // This line is disgusting - SDL_Surface * save = SDL_CreateRGBSurfaceFrom(pixels, info->w, info->h, info->format->BitsPerPixel, info->w * info->format->BytesPerPixel, - info->format->Rmask, info->format->Gmask, info->format->Bmask, info->format->Amask); - if (save == NULL) +#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()); + + SDL_FreeSurface(surf); + delete [] pixels; + Debug("Succeeded!"); +} + +/** + * Render a BMP + * NOT PART OF THE DOCUMENT FORMAT + */ +void Screen::RenderBMP(const char * filename) const +{ + if (access(filename, R_OK) == -1) { - Fatal("Couldn't create SDL_Surface from renderer pixel data - %s", SDL_GetError()); + Error("No such file \"%s\" - Nothing to render - You might have done this deliberately?", filename); + return; } - if (SDL_SaveBMP(save, filename) != 0) + SDL_Surface * bmp = SDL_LoadBMP(filename); + if (bmp == NULL) + Fatal("Failed to load BMP from %s - %s", filename, SDL_GetError()); + + int w = bmp->w; + int h = bmp->h; + + GLenum texture_format; + switch (bmp->format->BytesPerPixel) { - Fatal("SDL_SaveBMP to %s failed - %s", filename, SDL_GetError()); + case 4: //contains alpha + texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGBA : GL_BGRA; + break; + case 3: //does not contain alpha + texture_format = (bmp->format->Rmask == 0x000000FF) ? GL_RGB : GL_BGR; + break; + default: + Fatal("Could not understand SDL_Surface format (%d colours)", bmp->format->BytesPerPixel); + break; } - //SDL_DestroyRenderer(renderer); - SDL_FreeSurface(save); - SDL_FreeSurface(info); - delete [] pixels; + //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("Succeeded!"); + 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); + + 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(0,0); + 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_PROJECTION); + glPopMatrix(); +} + +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); }