void PictureBank::createResources()
{
Picture& originalPic = getPicture( ResourceGroup::utilitya, 34 );
setPicture( std::string( ResourceGroup::waterbuildings ) + "_00001.png", *originalPic.getSurface() );
Picture* fullReservoir = originalPic.createCopy(); //mem leak on destroy picloader
fullReservoir->draw( getPicture( ResourceGroup::utilitya, 35 ), 47, 37 );
setPicture( std::string( ResourceGroup::waterbuildings ) + "_00002.png", *fullReservoir->getSurface() );
Picture& emptyFontainOrig = getPicture( ResourceGroup::utilitya, 10 );
setPicture( std::string( ResourceGroup::waterbuildings ) + "_00003.png", *emptyFontainOrig.getSurface() );
Picture* fullFontain = emptyFontainOrig.createCopy(); //mem leak on destroy picloader
fullFontain->draw( getPicture( ResourceGroup::utilitya, 11 ), 12, 25 );
setPicture( std::string( ResourceGroup::waterbuildings) + "_00004.png", *fullFontain->getSurface() );
}
void Picture::draw( const Picture &srcpic, const Rect& srcrect, const Rect& dstrect, bool useAlpha )
{
SDL_Surface *srcimg = srcpic.getSurface();
if( !(srcimg && _d->surface) )
{
return;
}
SDL_Rect srcRect, dstRect;
srcRect.x = srcrect.getLeft();
srcRect.y = srcrect.getTop();
srcRect.w = srcrect.getWidth();
srcRect.h = srcrect.getHeight();
dstRect.x = dstrect.getLeft();
dstRect.y = dstrect.getTop();
dstRect.w = dstrect.getWidth();
dstRect.h = dstrect.getHeight();
if( useAlpha )
{
SDL_BlitSurface(srcimg, &srcRect, _d->surface, &dstRect);
}
else
{
SDL_Surface* tmpSurface = SDL_ConvertSurface( srcimg, _d->surface->format, SDL_SWSURFACE);
SDL_SetAlpha( tmpSurface, 0, 0 );
SDL_BlitSurface(tmpSurface, &srcRect, _d->surface, &dstRect);
SDL_FreeSurface( tmpSurface );
}
}
void GfxGlEngine::unloadPicture(Picture &ioPicture)
{
const GLuint& texture = (GLuint)ioPicture.getGlTextureID();
glDeleteTextures(1, &texture );
SDL_FreeSurface(ioPicture.getSurface());
ioPicture = Picture();
}
void GfxGlEngine::loadPicture(Picture& ioPicture)
{
GLuint& texture(ioPicture.getGlTextureID());
SDL_Surface *surface = ioPicture.getSurface();
GLenum texture_format;
GLint nOfColors;
// SDL_Surface *surface2
// get the number of channels in the SDL surface
nOfColors = surface->format->BytesPerPixel;
if (nOfColors == 4) // contains an alpha channel
{
if (surface->format->Rmask == 0x000000ff)
texture_format = GL_RGBA;
else
texture_format = GL_BGRA;
}
else if (nOfColors == 3) // no alpha channel
{
if (surface->format->Rmask == 0x000000ff)
texture_format = GL_RGB;
else
texture_format = GL_BGR;
}
else
{
THROW("Invalid image format");
}
if (texture == 0)
{
// the picture has no texture ID!
// generate a texture ID
glGenTextures( 1, &texture );
}
// Bind the texture object
glBindTexture( GL_TEXTURE_2D, texture );
// Set the texture's stretching properties
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST );
// Edit the texture object's image data using the information SDL_Surface gives us
ioPicture.lock();
glTexImage2D( GL_TEXTURE_2D, 0, nOfColors, surface->w, surface->h, 0,
texture_format, GL_UNSIGNED_BYTE, surface->pixels );
ioPicture.unlock();
}
void PictureBank::setPicture( const std::string &name, const Picture& pic )
{
setPicture( name, *pic.getSurface() );
}
// load in the image data
Picture PictureLoaderPng::load( io::NFile file ) const
{
if(!file.isOpen())
{
Logger::warning( "LOAD PNG: can't open file %s", file.getFileName().toString().c_str() );
return Picture::getInvalid();
}
png_byte buffer[8];
// Read the first few bytes of the PNG file
if( file.read(buffer, 8) != 8 )
{
Logger::warning( "LOAD PNG: can't read file %s", file.getFileName().toString().c_str() );
return Picture::getInvalid();
}
// Check if it really is a PNG file
if( png_sig_cmp(buffer, 0, 8) )
{
Logger::warning( "LOAD PNG: not really a png %s", file.getFileName().toString().c_str() );
return Picture::getInvalid();
}
// Allocate the png read struct
png_structp png_ptr = png_create_read_struct( PNG_LIBPNG_VER_STRING,
NULL, (png_error_ptr)png_cpexcept_error,
(png_error_ptr)png_cpexcept_warn);
if( !png_ptr )
{
Logger::warning( "LOAD PNG: Internal PNG create read struct failure %s", file.getFileName().toString().c_str() );
return Picture::getInvalid();
}
// Allocate the png info struct
png_infop info_ptr = png_create_info_struct(png_ptr);
if (!info_ptr)
{
Logger::warning( "LOAD PNG: Internal PNG create info struct failure 5s", file.getFileName().toString().c_str() );
png_destroy_read_struct(&png_ptr, NULL, NULL);
return Picture::getInvalid();
}
// for proper error handling
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
/*
if( RowPointers )
delete [] RowPointers;
*/
return Picture::getInvalid();
}
// changed by zola so we don't need to have public FILE pointers
png_set_read_fn(png_ptr, &file, user_read_data_fcn);
png_set_sig_bytes(png_ptr, 8); // Tell png that we read the signature
png_read_info(png_ptr, info_ptr); // Read the info section of the png file
unsigned int Width;
unsigned int Height;
int BitDepth;
int ColorType;
{
// Use temporary variables to avoid passing casted pointers
png_uint_32 w,h;
// Extract info
png_get_IHDR(png_ptr, info_ptr,
&w, &h,
&BitDepth, &ColorType, NULL, NULL, NULL);
Width=w;
Height=h;
}
// Convert palette color to true color
if (ColorType==PNG_COLOR_TYPE_PALETTE)
png_set_palette_to_rgb(png_ptr);
// Convert low bit colors to 8 bit colors
if (BitDepth < 8)
{
if (ColorType==PNG_COLOR_TYPE_GRAY || ColorType==PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_expand_gray_1_2_4_to_8(png_ptr);
else
png_set_packing(png_ptr);
}
if (png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS))
png_set_tRNS_to_alpha(png_ptr);
// Convert high bit colors to 8 bit colors
if (BitDepth == 16)
png_set_strip_16(png_ptr);
// Convert gray color to true color
if (ColorType==PNG_COLOR_TYPE_GRAY || ColorType==PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png_ptr);
int intent;
const double screen_gamma = 2.2;
if (png_get_sRGB(png_ptr, info_ptr, &intent))
png_set_gamma(png_ptr, screen_gamma, 0.45455);
else
{
double image_gamma;
if (png_get_gAMA(png_ptr, info_ptr, &image_gamma))
png_set_gamma(png_ptr, screen_gamma, image_gamma);
else
png_set_gamma(png_ptr, screen_gamma, 0.45455);
}
// Update the changes in between, as we need to get the new color type
// for proper processing of the RGBA type
png_read_update_info(png_ptr, info_ptr);
{
// Use temporary variables to avoid passing casted pointers
png_uint_32 w,h;
// Extract info
png_get_IHDR(png_ptr, info_ptr,
&w, &h,
&BitDepth, &ColorType, NULL, NULL, NULL);
Width=w;
Height=h;
}
// Convert RGBA to BGRA
if (ColorType==PNG_COLOR_TYPE_RGB_ALPHA)
{
png_set_bgr(png_ptr);
}
// Create the image structure to be filled by png data
Picture* pic = GfxEngine::instance().createPicture( Size( Width, Height ) );
GfxEngine::instance().loadPicture( *pic );
if( pic->getSize().getArea() == 0 )
{
Logger::warning( "LOAD PNG: Internal PNG create image struct failure %s", file.getFileName().toString().c_str() );
png_destroy_read_struct(&png_ptr, NULL, NULL);
return Picture::getInvalid();
}
if( !Height )
{
Logger::warning( "LOAD PNG: Internal PNG create row pointers failure %s", file.getFileName().toString().c_str() );
png_destroy_read_struct(&png_ptr, NULL, NULL);
return Picture::getInvalid();
}
// Create array of pointers to rows in image data
ScopedPtr<unsigned char*> RowPointers( (unsigned char**)new png_bytep[ Height ] );
// Fill array of pointers to rows in image data
SDL_LockSurface( pic->getSurface() );
unsigned char* data = (unsigned char*)pic->getSurface()->pixels;
for(unsigned int i=0; i<Height; ++i)
{
RowPointers.data()[i] = data;
data += pic->getSurface()->pitch;
}
// for proper error handling
if( setjmp( png_jmpbuf( png_ptr ) ) )
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
GfxEngine::instance().deletePicture( pic );
return Picture::getInvalid();
}
// Read data using the library function that handles all transformations including interlacing
png_read_image( png_ptr, RowPointers.data() );
png_read_end( png_ptr, NULL );
png_destroy_read_struct( &png_ptr, &info_ptr, 0 ); // Clean up memory
SDL_UnlockSurface(pic->getSurface());
return *pic;
}
