SDL::Renderer Class Reference

#include <sdl_renderer.hpp>

Inherits Renderer.

List of all members.

Public Member Functions
	Renderer ()
	~Renderer ()
void	draw_surface (const DrawingRequest &request)
void	draw_surface_part (const DrawingRequest &request)
void	draw_text (const DrawingRequest &request)
void	draw_gradient (const DrawingRequest &request)
void	draw_filled_rect (const DrawingRequest &request)
void	draw_inverse_ellipse (const DrawingRequest &request)
void	do_take_screenshot ()
void	flip ()
void	resize (int w, int h)
void	apply_config ()
Private Attributes
SDL_Surface *	screen
int	numerator
int	denominator

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Detailed Description

Definition at line 28 of file sdl_renderer.hpp.

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Constructor & Destructor Documentation

Renderer::Renderer

(

)

Reimplemented from Renderer.

Definition at line 131 of file sdl_renderer.cpp.

References config, Renderer::instance_, log_info, screen, texture_manager, and Config::use_fullscreen.

  {
    ::Renderer::instance_ = this;

    const SDL_VideoInfo *info = SDL_GetVideoInfo();
    log_info << "Hardware surfaces are " << (info->hw_available ? "" : "not ") << "available." << std::endl;
    log_info << "Hardware to hardware blits are " << (info->blit_hw ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Hardware to hardware blits with colorkey are " << (info->blit_hw_CC ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Hardware to hardware blits with alpha are " << (info->blit_hw_A ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Software to hardware blits are " << (info->blit_sw ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Software to hardware blits with colorkey are " << (info->blit_sw_CC ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Software to hardware blits with alpha are " << (info->blit_sw_A ? "" : "not ") << "accelerated." << std::endl;
    log_info << "Color fills are " << (info->blit_fill ? "" : "not ") << "accelerated." << std::endl;

    int flags = SDL_SWSURFACE | SDL_ANYFORMAT;
    if(config->use_fullscreen)
      flags |= SDL_FULLSCREEN;
    
    int width  = 800; //FIXME: config->screenwidth;
    int height = 600; //FIXME: config->screenheight;

    screen = SDL_SetVideoMode(width, height, 0, flags);
    if(screen == 0) {
      std::stringstream msg;
      msg << "Couldn't set video mode (" << width << "x" << height
          << "): " << SDL_GetError();
      throw std::runtime_error(msg.str());
    }

    numerator   = 1;
    denominator = 1;
    /* FIXME: 
    float xfactor = (float) config->screenwidth / SCREEN_WIDTH;
    float yfactor = (float) config->screenheight / SCREEN_HEIGHT;
    if(xfactor < yfactor)
    {
      numerator = config->screenwidth;
      denominator = SCREEN_WIDTH;
    }
    else
    {
      numerator = config->screenheight;
      denominator = SCREEN_HEIGHT;
    }
    */
    if(texture_manager == 0)
      texture_manager = new TextureManager();
  }

Renderer::~Renderer

(

)

[virtual]

Reimplemented from Renderer.

Definition at line 180 of file sdl_renderer.cpp.

  {
  }

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Member Function Documentation

void Renderer::draw_surface

(

const DrawingRequest &

request

)

[virtual]

Implements Renderer.

Definition at line 185 of file sdl_renderer.cpp.

References DrawingRequest::alpha, DrawingRequest::color, DrawingRequest::drawing_effect, Surface::get_flipx(), SDL::SurfaceData::get_src_rect(), Surface::get_surface_data(), Surface::get_texture(), HORIZONTAL_FLIP, DrawingRequest::pos, DrawingRequest::request_data, screen, Vector::x, and Vector::y.

  {
    //FIXME: support parameters request.alpha, request.angle, request.blend
    const Surface* surface = (const Surface*) request.request_data;
    SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());
    SDL::SurfaceData *surface_data = reinterpret_cast<SDL::SurfaceData *>(surface->get_surface_data());

    DrawingEffect effect = request.drawing_effect;
    if (surface->get_flipx()) effect = HORIZONTAL_FLIP;

    SDL_Surface *transform = sdltexture->get_transform(request.color, effect);

    // get and check SDL_Surface
    if (transform == 0) {
      std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
      return;
    }

    SDL_Rect *src_rect = surface_data->get_src_rect(effect);
    SDL_Rect dst_rect;
    dst_rect.x = (int) request.pos.x * numerator / denominator;
    dst_rect.y = (int) request.pos.y * numerator / denominator;

    Uint8 alpha = 0;
    if(request.alpha != 1.0)
    {
      if(!transform->format->Amask)
      {
        if(transform->flags & SDL_SRCALPHA)
        {
          alpha = transform->format->alpha;
        }
        else
        {
          alpha = 255;
        }
        SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
      }
      /*else
      {
        transform = apply_alpha(transform, request.alpha);
      }*/
    }

    SDL_BlitSurface(transform, src_rect, screen, &dst_rect);

    if(request.alpha != 1.0)
    {
      if(!transform->format->Amask)
      {
        if(alpha == 255)
        {
          SDL_SetAlpha(transform, SDL_RLEACCEL, 0);
        }
        else
        {
          SDL_SetAlpha(transform, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
        }
      }
      /*else
      {
        SDL_FreeSurface(transform);
      }*/
    }
  }

void Renderer::draw_surface_part

(

const DrawingRequest &

request

)

[virtual]

Implements Renderer.

Definition at line 252 of file sdl_renderer.cpp.

References DrawingRequest::alpha, DrawingRequest::color, DrawingRequest::drawing_effect, HORIZONTAL_FLIP, DrawingRequest::pos, DrawingRequest::request_data, screen, SurfacePartRequest::size, SurfacePartRequest::source, SurfacePartRequest::surface, VERTICAL_FLIP, Vector::x, and Vector::y.

  {
    const SurfacePartRequest* surfacepartrequest
      = (SurfacePartRequest*) request.request_data;

    const Surface* surface = surfacepartrequest->surface;
    SDL::Texture *sdltexture = dynamic_cast<SDL::Texture *>(surface->get_texture());

    DrawingEffect effect = request.drawing_effect;
    if (surface->get_flipx()) effect = HORIZONTAL_FLIP;

    SDL_Surface *transform = sdltexture->get_transform(request.color, effect);

    // get and check SDL_Surface
    if (transform == 0) {
      std::cerr << "Warning: Tried to draw NULL surface, skipped draw" << std::endl;
      return;
    }

    int ox, oy;
    if (effect == HORIZONTAL_FLIP)
    {
      ox = sdltexture->get_texture_width() - surface->get_x() - (int) surfacepartrequest->size.x;
    }
    else
    {
      ox = surface->get_x();
    }
    if (effect == VERTICAL_FLIP)
    {
      oy = sdltexture->get_texture_height() - surface->get_y() - (int) surfacepartrequest->size.y;
    }
    else
    {
      oy = surface->get_y();
    }

    SDL_Rect src_rect;
    src_rect.x = (ox + (int) surfacepartrequest->source.x) * numerator / denominator;
    src_rect.y = (oy + (int) surfacepartrequest->source.y) * numerator / denominator;
    src_rect.w = (int) surfacepartrequest->size.x * numerator / denominator;
    src_rect.h = (int) surfacepartrequest->size.y * numerator / denominator;

    SDL_Rect dst_rect;
    dst_rect.x = (int) request.pos.x * numerator / denominator;
    dst_rect.y = (int) request.pos.y * numerator / denominator;

    Uint8 alpha = 0;
    if(request.alpha != 1.0)
    {
      if(!transform->format->Amask)
      {
        if(transform->flags & SDL_SRCALPHA)
        {
          alpha = transform->format->alpha;
        }
        else
        {
          alpha = 255;
        }
        SDL_SetAlpha(transform, SDL_SRCALPHA, (Uint8) (request.alpha * alpha));
      }
      /*else
      {
        transform = apply_alpha(transform, request.alpha);
      }*/
    }

    SDL_BlitSurface(transform, &src_rect, screen, &dst_rect);

    if(request.alpha != 1.0)
    {
      if(!transform->format->Amask)
      {
        if(alpha == 255)
        {
          SDL_SetAlpha(transform, SDL_RLEACCEL, 0);
        }
        else
        {
          SDL_SetAlpha(transform, SDL_SRCALPHA | SDL_RLEACCEL, alpha);
        }
      }
      /*else
      {
        SDL_FreeSurface(transform);
      }*/
    }
  }

void SDL::Renderer::draw_text

(

const DrawingRequest &

request

)

void Renderer::draw_gradient

(

const DrawingRequest &

request

)

[virtual]

Implements Renderer.

Definition at line 343 of file sdl_renderer.cpp.

References GradientRequest::bottom, DrawingRequest::request_data, screen, and GradientRequest::top.

  {
    const GradientRequest* gradientrequest 
      = (GradientRequest*) request.request_data;
    const Color& top = gradientrequest->top;
    const Color& bottom = gradientrequest->bottom;

    for(int y = 0;y < screen->h;++y)
    {
      Uint8 r = (Uint8)((((float)(top.red-bottom.red)/(0-screen->h)) * y + top.red) * 255);
      Uint8 g = (Uint8)((((float)(top.green-bottom.green)/(0-screen->h)) * y + top.green) * 255);
      Uint8 b = (Uint8)((((float)(top.blue-bottom.blue)/(0-screen->h)) * y + top.blue) * 255);
      Uint8 a = (Uint8)((((float)(top.alpha-bottom.alpha)/(0-screen->h)) * y + top.alpha) * 255);
      Uint32 color = SDL_MapRGB(screen->format, r, g, b);

      SDL_Rect rect;
      rect.x = 0;
      rect.y = y;
      rect.w = screen->w;
      rect.h = 1;

      if(a == SDL_ALPHA_OPAQUE) {
        SDL_FillRect(screen, &rect, color);
      } else if(a != SDL_ALPHA_TRANSPARENT) {
        SDL_Surface *temp = SDL_CreateRGBSurface(screen->flags, rect.w, rect.h, screen->format->BitsPerPixel, screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, screen->format->Amask);

        SDL_FillRect(temp, 0, color);
        SDL_SetAlpha(temp, SDL_SRCALPHA | SDL_RLEACCEL, a);
        SDL_BlitSurface(temp, 0, screen, &rect);
        SDL_FreeSurface(temp);
      }
    }
  }

void Renderer::draw_filled_rect

(

const DrawingRequest &

request

)

[virtual]

Implements Renderer.

Definition at line 378 of file sdl_renderer.cpp.

References Color::alpha, Color::blue, FillRectRequest::color, Color::green, DrawingRequest::pos, Color::red, DrawingRequest::request_data, screen, SCREEN_HEIGHT, SCREEN_WIDTH, FillRectRequest::size, Vector::x, and Vector::y.

  {
    const FillRectRequest* fillrectrequest
      = (FillRectRequest*) request.request_data;

    SDL_Rect rect;
    rect.x = (Sint16)request.pos.x * screen->w / SCREEN_WIDTH;
    rect.y = (Sint16)request.pos.y * screen->h / SCREEN_HEIGHT;
    rect.w = (Uint16)fillrectrequest->size.x * screen->w / SCREEN_WIDTH;
    rect.h = (Uint16)fillrectrequest->size.y * screen->h / SCREEN_HEIGHT;
    Uint8 r = static_cast<Uint8>(fillrectrequest->color.red * 255);
    Uint8 g = static_cast<Uint8>(fillrectrequest->color.green * 255);
    Uint8 b = static_cast<Uint8>(fillrectrequest->color.blue * 255);
    Uint8 a = static_cast<Uint8>(fillrectrequest->color.alpha * 255);
    Uint32 color = SDL_MapRGB(screen->format, r, g, b);
    if(a == SDL_ALPHA_OPAQUE) {
      SDL_FillRect(screen, &rect, color);
    } else if(a != SDL_ALPHA_TRANSPARENT) {
      SDL_Surface *temp = SDL_CreateRGBSurface(screen->flags, rect.w, rect.h, screen->format->BitsPerPixel, screen->format->Rmask, screen->format->Gmask, screen->format->Bmask, screen->format->Amask);

      SDL_FillRect(temp, 0, color);
      SDL_SetAlpha(temp, SDL_SRCALPHA | SDL_RLEACCEL, a);
      SDL_BlitSurface(temp, 0, screen, &rect);
      SDL_FreeSurface(temp);
    }
  }

void Renderer::draw_inverse_ellipse

(

const DrawingRequest &

request

)

[virtual]

Implements Renderer.

Definition at line 406 of file sdl_renderer.cpp.

  {
  }

void Renderer::do_take_screenshot

(

)

[virtual]

Implements Renderer.

Definition at line 411 of file sdl_renderer.cpp.

References log_debug, log_warning, and screen.

  {
    // [Christoph] TODO: Yes, this method also takes care of the actual disk I/O. Split it?

    SDL_Surface *screen = SDL_GetVideoSurface();

    // save screenshot
    static const std::string writeDir = PHYSFS_getWriteDir();
    static const std::string dirSep = PHYSFS_getDirSeparator();
    static const std::string baseName = "screenshot";
    static const std::string fileExt = ".bmp";
    std::string fullFilename;
    for (int num = 0; num < 1000; num++) {
      std::ostringstream oss;
      oss << baseName;
      oss << std::setw(3) << std::setfill('0') << num;
      oss << fileExt;
      std::string fileName = oss.str();
      fullFilename = writeDir + dirSep + fileName;
      if (!PHYSFS_exists(fileName.c_str())) {
        SDL_SaveBMP(screen, fullFilename.c_str());
        log_debug << "Wrote screenshot to \"" << fullFilename << "\"" << std::endl;
        return;
      }
    }
    log_warning << "Did not save screenshot, because all files up to \"" << fullFilename << "\" already existed" << std::endl;
  }

void Renderer::flip

(

)

[virtual]

Implements Renderer.

Definition at line 440 of file sdl_renderer.cpp.

References screen.

  {
    SDL_Flip(screen);
  }

void Renderer::resize	(	int	w,
		int	h
	)			[virtual]

Implements Renderer.

Definition at line 446 of file sdl_renderer.cpp.

  {
    
  }

void SDL::Renderer::apply_config

(

)

[inline, virtual]

Implements Renderer.

Definition at line 43 of file sdl_renderer.hpp.

{}

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Member Data Documentation

SDL_Surface* SDL::Renderer::screen [private]

Definition at line 45 of file sdl_renderer.hpp.

int SDL::Renderer::numerator [private]

Definition at line 46 of file sdl_renderer.hpp.

int SDL::Renderer::denominator [private]

Definition at line 46 of file sdl_renderer.hpp.

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The documentation for this class was generated from the following files:

• src/video/sdl_renderer.hpp
• src/video/sdl_renderer.cpp

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