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94712f5c775336fe4b39d56b809c92c54df23e52
maszyna/Texture.cpp
milek7 94712f5c77 TMP
2018-07-11 00:30:33 +02:00

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/*
This Source Code Form is subject to the
terms of the Mozilla Public License, v.
2.0. If a copy of the MPL was not
distributed with this file, You can
obtain one at
http://mozilla.org/MPL/2.0/.
*/
/*
MaSzyna EU07 locomotive simulator
Copyright (C) 2001-2004 Marcin Wozniak and others
*/
#include "stdafx.h"
#include "Texture.h"
#include "GL/glew.h"
#include "utilities.h"
#include "Globals.h"
#include "Logs.h"
#include "sn_utils.h"
#include "utilities.h"
#include "flip-s3tc.h"
#include <png.h>
#define EU07_DEFERRED_TEXTURE_UPLOAD
texture_manager::texture_manager() {
// since index 0 is used to indicate no texture, we put a blank entry in the first texture slot
m_textures.emplace_back( new opengl_texture(), std::chrono::steady_clock::time_point() );
}
// loads texture data from specified file
// TODO: wrap it in a workitem class, for the job system deferred loading
void
opengl_texture::load() {
if( name.size() < 3 ) { goto fail; }
WriteLog( "Loading texture data from \"" + name + "\"", logtype::texture );
data_state = resource_state::loading;
{
std::string const extension = name.substr( name.size() - 3, 3 );
if( extension == "dds" ) { load_DDS(); }
else if( extension == "tga" ) { load_TGA(); }
else if( extension == "png" ) { load_PNG(); }
else if( extension == "bmp" ) { load_BMP(); }
else if( extension == "tex" ) { load_TEX(); }
else { goto fail; }
}
// data state will be set by called loader, so we're all done here
if( data_state == resource_state::good ) {
has_alpha = (
data_components == GL_RGBA ?
true :
false );
size = data.size() / 1024;
return;
}
fail:
data_state = resource_state::failed;
ErrorLog( "Bad texture: failed to load texture \"" + name + "\"" );
// NOTE: temporary workaround for texture assignment errors
id = 0;
return;
}
void opengl_texture::load_PNG()
{
png_image png;
memset(&png, 0, sizeof(png_image));
png.version = PNG_IMAGE_VERSION;
png_image_begin_read_from_file(&png, name.c_str());
if (png.warning_or_error)
{
data_state = resource_state::failed;
ErrorLog(name + " error: " + std::string(png.message));
return;
}
if (png.format & PNG_FORMAT_FLAG_ALPHA)
{
data_format = GL_RGBA;
data_components = GL_RGBA;
png.format = PNG_FORMAT_RGBA;
}
else
{
data_format = GL_RGB;
data_components = GL_RGB;
png.format = PNG_FORMAT_RGB;
}
data_width = png.width;
data_height = png.height;
data.resize(PNG_IMAGE_SIZE(png));
png_image_finish_read(&png, nullptr,
(void*)&data[0], -data_width * PNG_IMAGE_PIXEL_SIZE(png.format), nullptr);
// we're storing texture data internally with bottom-left origin
// so use negative stride
if (png.warning_or_error)
{
data_state = resource_state::failed;
ErrorLog(name + " error: " + std::string(png.message));
return;
}
data_mapcount = 1;
data_state = resource_state::good;
}
void
opengl_texture::load_BMP() {
std::ifstream file( name, std::ios::binary ); file.unsetf( std::ios::skipws );
BITMAPFILEHEADER header;
file.read( (char *)&header, sizeof( BITMAPFILEHEADER ) );
if( file.eof() ) {
data_state = resource_state::failed;
return;
}
// Read in bitmap information structure
BITMAPINFO info;
unsigned int infosize = header.bfOffBits - sizeof( BITMAPFILEHEADER );
if( infosize > sizeof( info ) ) {
WriteLog( "Warning - BMP header is larger than expected, possible format difference.", logtype::texture );
}
file.read( (char *)&info, std::min( (size_t)infosize, sizeof( info ) ) );
data_width = info.bmiHeader.biWidth;
data_height = info.bmiHeader.biHeight;
if( info.bmiHeader.biCompression != BI_RGB ) {
ErrorLog( "Bad texture: compressed BMP textures aren't supported.", logtype::texture );
data_state = resource_state::failed;
return;
}
unsigned long datasize = info.bmiHeader.biSizeImage;
if( 0 == datasize ) {
// calculate missing info
datasize = ( data_width * info.bmiHeader.biBitCount + 7 ) / 8 * data_height;
}
data.resize( datasize );
file.read( &data[0], datasize );
// we're storing texture data internally with bottom-left origin
// so BMP origin matches, no flipping needed
// fill remaining data info
if( info.bmiHeader.biBitCount == 32 ) {
data_format = GL_BGRA;
data_components = GL_RGBA;
}
else {
data_format = GL_BGR;
data_components = GL_RGB;
}
data_mapcount = 1;
data_state = resource_state::good;
return;
}
DDCOLORKEY opengl_texture::deserialize_ddck(std::istream &s)
{
DDCOLORKEY ddck;
ddck.dwColorSpaceLowValue = sn_utils::ld_uint32(s);
ddck.dwColorSpaceHighValue = sn_utils::ld_uint32(s);
return ddck;
}
DDPIXELFORMAT opengl_texture::deserialize_ddpf(std::istream &s)
{
DDPIXELFORMAT ddpf;
ddpf.dwSize = sn_utils::ld_uint32(s);
ddpf.dwFlags = sn_utils::ld_uint32(s);
ddpf.dwFourCC = sn_utils::ld_uint32(s);
ddpf.dwRGBBitCount = sn_utils::ld_uint32(s);
ddpf.dwRBitMask = sn_utils::ld_uint32(s);
ddpf.dwGBitMask = sn_utils::ld_uint32(s);
ddpf.dwBBitMask = sn_utils::ld_uint32(s);
ddpf.dwRGBAlphaBitMask = sn_utils::ld_uint32(s);
return ddpf;
}
DDSCAPS2 opengl_texture::deserialize_ddscaps(std::istream &s)
{
DDSCAPS2 ddsc;
ddsc.dwCaps = sn_utils::ld_uint32(s);
ddsc.dwCaps2 = sn_utils::ld_uint32(s);
ddsc.dwCaps3 = sn_utils::ld_uint32(s);
ddsc.dwCaps4 = sn_utils::ld_uint32(s);
return ddsc;
}
DDSURFACEDESC2 opengl_texture::deserialize_ddsd(std::istream &s)
{
DDSURFACEDESC2 ddsd;
ddsd.dwSize = sn_utils::ld_uint32(s);
ddsd.dwFlags = sn_utils::ld_uint32(s);
ddsd.dwHeight = sn_utils::ld_uint32(s);
ddsd.dwWidth = sn_utils::ld_uint32(s);
ddsd.lPitch = sn_utils::ld_uint32(s);
ddsd.dwBackBufferCount = sn_utils::ld_uint32(s);
ddsd.dwMipMapCount = sn_utils::ld_uint32(s);
ddsd.dwAlphaBitDepth = sn_utils::ld_uint32(s);
ddsd.dwReserved = sn_utils::ld_uint32(s);
sn_utils::ld_uint32(s);
ddsd.lpSurface = nullptr;
ddsd.ddckCKDestOverlay = deserialize_ddck(s);
ddsd.ddckCKDestBlt = deserialize_ddck(s);
ddsd.ddckCKSrcOverlay = deserialize_ddck(s);
ddsd.ddckCKSrcBlt = deserialize_ddck(s);
ddsd.ddpfPixelFormat = deserialize_ddpf(s);
ddsd.ddsCaps = deserialize_ddscaps(s);
ddsd.dwTextureStage = sn_utils::ld_uint32(s);
return ddsd;
}
void
opengl_texture::load_DDS() {
std::ifstream file( name, std::ios::binary | std::ios::ate ); file.unsetf( std::ios::skipws );
std::size_t filesize = static_cast<size_t>(file.tellg()); // ios::ate already positioned us at the end of the file
file.seekg( 0, std::ios::beg ); // rewind the caret afterwards
char filecode[5];
file.read(filecode, 4);
filesize -= 4;
filecode[4] = 0;
if( filecode != std::string( "DDS " ) )
{
data_state = resource_state::failed;
return;
}
DDSURFACEDESC2 ddsd = deserialize_ddsd(file);
filesize -= 124;
//
// This .dds loader supports the loading of compressed formats DXT1, DXT3
// and DXT5.
//
switch (ddsd.ddpfPixelFormat.dwFourCC)
{
case FOURCC_DXT1:
// DXT1's compression ratio is 8:1
data_format = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT;
break;
case FOURCC_DXT3:
// DXT3's compression ratio is 4:1
data_format = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT;
break;
case FOURCC_DXT5:
// DXT5's compression ratio is 4:1
data_format = GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT;
break;
default:
data_state = resource_state::failed;
return;
}
data_width = ddsd.dwWidth;
data_height = ddsd.dwHeight;
data_mapcount = ddsd.dwMipMapCount;
int blockSize = ( data_format == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT ? 8 : 16 );
int offset = 0;
while( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// pomijanie zbyt dużych mipmap, jeśli wymagane jest ograniczenie rozmiaru
offset += ( ( data_width + 3 ) / 4 ) * ( ( data_height + 3 ) / 4 ) * blockSize;
data_width /= 2;
data_height /= 2;
--data_mapcount;
WriteLog( "Texture size exceeds specified limits, skipping mipmap level" );
};
if( data_mapcount <= 0 ) {
// there's a chance we've discarded the provided mipmap(s) as too large
WriteLog( "Texture \"" + name + "\" has no mipmaps which can fit currently set texture size limits." );
data_state = resource_state::failed;
return;
}
size_t datasize = filesize - offset;
if( datasize == 0 ) {
// catch malformed .dds files
WriteLog( "Bad texture: file \"" + name + "\" is malformed and holds no texture data.", logtype::texture );
data_state = resource_state::failed;
return;
}
// reserve space and load texture data
data.resize( datasize );
if( offset != 0 ) {
// skip data for mipmaps we don't need
file.seekg( offset, std::ios_base::cur );
filesize -= offset;
}
file.read((char *)&data[0], datasize);
filesize -= datasize;
// we're storing texture data internally with bottom-left origin,
// while DDS stores it with top-left origin. we need to flip it.
if (Global.dds_upper_origin)
{
char *mipmap = (char*)&data[0];
int mapcount = data_mapcount,
width = data_width,
height = data_height;
while (mapcount)
{
if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1)
flip_s3tc::flip_dxt1_image(mipmap, width, height);
else if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT3)
flip_s3tc::flip_dxt23_image(mipmap, width, height);
else if (ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT5)
flip_s3tc::flip_dxt45_image(mipmap, width, height);
mipmap += ( ( width + 3 ) / 4 ) * ( ( height + 3 ) / 4 ) * blockSize;
width = std::max( width / 2, 4 );
height = std::max( height / 2, 4 );
--mapcount;
}
}
data_components =
( ddsd.ddpfPixelFormat.dwFourCC == FOURCC_DXT1 ?
GL_RGB :
GL_RGBA );
data_state = resource_state::good;
return;
}
void
opengl_texture::load_TEX() {
std::ifstream file( name, std::ios::binary ); file.unsetf( std::ios::skipws );
char head[ 5 ];
file.read( head, 4 );
head[ 4 ] = 0;
bool hasalpha;
if( std::string( "RGB " ) == head ) {
hasalpha = false;
}
else if( std::string( "RGBA" ) == head ) {
hasalpha = true;
}
else {
ErrorLog( "Bad texture: unrecognized TEX texture sub-format: " + std::string(head), logtype::texture );
data_state = resource_state::failed;
return;
};
file.read( (char *)&data_width, sizeof( int ) );
file.read( (char *)&data_height, sizeof( int ) );
std::size_t datasize = data_width * data_height * ( hasalpha ? 4 : 3 );
data.resize( datasize );
file.read( reinterpret_cast<char *>( &data[0] ), datasize );
// fill remaining data info
if( true == hasalpha ) {
data_format = GL_RGBA;
data_components = GL_RGBA;
}
else {
data_format = GL_RGB;
data_components = GL_RGB;
}
data_mapcount = 1;
data_state = resource_state::good;
return;
}
void
opengl_texture::load_TGA() {
std::ifstream file( name, std::ios::binary ); file.unsetf( std::ios::skipws );
// Read the header of the TGA, compare it with the known headers for compressed and uncompressed TGAs
unsigned char tgaheader[ 18 ];
file.read( (char *)tgaheader, sizeof( unsigned char ) * 18 );
while( tgaheader[ 0 ] > 0 ) {
--tgaheader[ 0 ];
unsigned char temp;
file.read( (char *)&temp, sizeof( unsigned char ) );
}
data_width = tgaheader[ 13 ] * 256 + tgaheader[ 12 ];
data_height = tgaheader[ 15 ] * 256 + tgaheader[ 14 ];
int const bytesperpixel = tgaheader[ 16 ] / 8;
// check whether width, height an BitsPerPixel are valid
if( ( data_width <= 0 )
|| ( data_height <= 0 )
|| ( ( bytesperpixel != 1 ) && ( bytesperpixel != 3 ) && ( bytesperpixel != 4 ) ) ) {
data_state = resource_state::failed;
return;
}
// allocate the data buffer
int const datasize = data_width * data_height * 4;
data.resize(datasize);
// call the appropriate loader-routine
if( tgaheader[ 2 ] == 2 ) {
// uncompressed TGA
if( bytesperpixel == 4 ) {
// read the data directly
file.read( reinterpret_cast<char*>( &data[0] ), datasize );
}
else {
// rgb or greyscale image, expand to bgra
unsigned char buffer[ 4 ] = { 255, 255, 255, 255 }; // alpha channel will be white
unsigned int *datapointer = (unsigned int*)&data[0];
unsigned int *bufferpointer = (unsigned int*)&buffer[ 0 ];
int const pixelcount = data_width * data_height;
for( int i = 0; i < pixelcount; ++i ) {
file.read( (char *)&buffer[ 0 ], sizeof( unsigned char ) * bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy all four values in one operation
( *datapointer ) = ( *bufferpointer );
++datapointer;
}
}
}
else if( tgaheader[ 2 ] == 10 ) {
// compressed TGA
int currentpixel = 0;
unsigned char buffer[ 4 ] = { 255, 255, 255, 255 };
const int pixelcount = data_width * data_height;
unsigned int *datapointer = (unsigned int *)&data[0];
unsigned int *bufferpointer = (unsigned int *)&buffer[ 0 ];
do {
unsigned char chunkheader = 0;
file.read( (char *)&chunkheader, sizeof( unsigned char ) );
if( (chunkheader & 0x80 ) == 0 ) {
// if the high bit is not set, it means it is the number of RAW color packets, plus 1
for( int i = 0; i <= chunkheader; ++i ) {
file.read( (char *)&buffer[ 0 ], bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy all four values in one operation
( *datapointer ) = ( *bufferpointer );
++datapointer;
++currentpixel;
}
}
else {
// rle chunk, the color supplied afterwards is reapeated header + 1 times (not including the highest bit)
chunkheader &= ~0x80;
// read the current color
file.read( (char *)&buffer[ 0 ], bytesperpixel );
if( bytesperpixel == 1 ) {
// expand greyscale data
buffer[ 1 ] = buffer[ 0 ];
buffer[ 2 ] = buffer[ 0 ];
}
// copy the color into the image data as many times as dictated
for( int i = 0; i <= chunkheader; ++i ) {
( *datapointer ) = ( *bufferpointer );
++datapointer;
++currentpixel;
}
}
} while( currentpixel < pixelcount );
}
else {
// unrecognized TGA sub-type
data_state = resource_state::failed;
return;
}
if( ( tgaheader[ 17 ] & 0x20 ) != 0 ) {
// normally origin is bottom-left
// if byte 17 bit 5 is set, it is top-left and needs flip
flip_vertical();
}
downsize( GL_BGRA );
if( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// for non-square textures there's currently possibility the scaling routine will have to abort
// before it gets all work done
data_state = resource_state::failed;
return;
}
// TODO: add horizontal/vertical data flip, based on the descriptor (18th) header byte
// fill remaining data info
data_mapcount = 1;
data_format = GL_BGRA;
data_components =
( bytesperpixel == 4 ?
GL_RGBA :
GL_RGB );
data_state = resource_state::good;
return;
}
bool
opengl_texture::bind() {
if( ( false == is_ready )
&& ( false == create() ) ) {
return false;
}
::glBindTexture( GL_TEXTURE_2D, id );
return true;
}
bool
opengl_texture::create() {
if( data_state != resource_state::good && !is_rendertarget ) {
// don't bother until we have useful texture data
// and it isn't rendertarget texture without loaded data
return false;
}
// TODO: consider creating and storing low-res version of the texture if it's ever unloaded from the gfx card,
// as a placeholder until it can be loaded again
if( id == -1 ) {
::glGenTextures( 1, &id );
::glBindTexture( GL_TEXTURE_2D, id );
// analyze specified texture traits
bool wraps{ true };
bool wrapt{ true };
for( auto const &trait : traits ) {
switch( trait ) {
case 's': { wraps = false; break; }
case 't': { wrapt = false; break; }
}
}
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, ( wraps == true ? GL_REPEAT : GL_CLAMP_TO_EDGE ) );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, ( wrapt == true ? GL_REPEAT : GL_CLAMP_TO_EDGE ) );
// upload texture data
int dataoffset = 0,
datasize = 0,
datawidth = data_width,
dataheight = data_height;
if (is_rendertarget)
{
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexImage2D(GL_TEXTURE_2D, 0, data_format, data_width, data_height, 0, data_components, data_type, nullptr);
}
else
{
set_filtering();
for( int maplevel = 0; maplevel < data_mapcount; ++maplevel ) {
if( ( data_format == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT )
|| ( data_format == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT )
|| ( data_format == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT ) ) {
// compressed dds formats
int const datablocksize =
( data_format == GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT ?
8 :
16 );
datasize = ( ( std::max( datawidth, 4 ) + 3 ) / 4 ) * ( ( std::max( dataheight, 4 ) + 3 ) / 4 ) * datablocksize;
::glCompressedTexImage2D(
GL_TEXTURE_2D, maplevel, data_format,
datawidth, dataheight, 0,
datasize, (GLubyte *)&data[ dataoffset ] );
dataoffset += datasize;
datawidth = std::max( datawidth / 2, 1 );
dataheight = std::max( dataheight / 2, 1 );
}
else {
// uncompressed texture data. have the gfx card do the compression as it sees fit
::glTexImage2D(
GL_TEXTURE_2D, 0,
Global.compress_tex ? GL_COMPRESSED_SRGB_ALPHA : GL_SRGB_ALPHA,
data_width, data_height, 0,
data_format, data_type, (GLubyte *)&data[ 0 ] );
}
}
if( data_mapcount == 1 ) {
// fill missing mipmaps if needed
glGenerateMipmap(GL_TEXTURE_2D);
}
if( ( true == Global.ResourceMove )
|| ( false == Global.ResourceSweep ) ) {
// if garbage collection is disabled we don't expect having to upload the texture more than once
data = std::vector<char>();
data_state = resource_state::none;
}
}
is_ready = true;
}
return true;
}
// releases resources allocated on the opengl end, storing local copy if requested
void
opengl_texture::release() {
if( id == -1 ) { return; }
if( true == Global.ResourceMove && !is_rendertarget ) {
// if resource move is enabled we don't keep a cpu side copy after upload
// so need to re-acquire the data before release
// TBD, TODO: instead of vram-ram transfer fetch the data 'normally' from the disk using worker thread
::glBindTexture( GL_TEXTURE_2D, id );
GLint datasize {};
GLint iscompressed {};
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED, &iscompressed );
if( iscompressed == GL_TRUE ) {
// texture is compressed on the gpu side
// query texture details needed to perform the backup...
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_INTERNAL_FORMAT, &data_format );
::glGetTexLevelParameteriv( GL_TEXTURE_2D, 0, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &datasize );
data.resize( datasize );
// ...fetch the data...
::glGetCompressedTexImage( GL_TEXTURE_2D, 0, &data[ 0 ] );
}
else {
// for whatever reason texture didn't get compressed during upload
// fallback on plain rgba storage...
data_format = GL_RGBA;
data_type = GL_UNSIGNED_BYTE;
data.resize( data_width * data_height * 4 );
// ...fetch the data...
::glGetTexImage( GL_TEXTURE_2D, 0, data_format, GL_UNSIGNED_BYTE, &data[ 0 ] );
}
// ...and update texture object state
data_mapcount = 1; // we keep copy of only top mipmap level
data_state = resource_state::good;
}
// release opengl resources
::glDeleteTextures( 1, &id );
id = -1;
is_ready = false;
return;
}
void opengl_texture::alloc_rendertarget(GLint format, GLint components, GLint type, int width, int height)
{
data_width = width;
data_height = height;
data_format = format;
data_components = components;
data_type = type;
data_mapcount = 1;
is_rendertarget = true;
create();
}
void
opengl_texture::set_filtering() const {
// default texture mode
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
::glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
if( GLEW_EXT_texture_filter_anisotropic ) {
// anisotropic filtering
::glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, Global.AnisotropicFiltering );
}
bool sharpen{ false };
for( auto const &trait : traits ) {
switch( trait ) {
case '#': { sharpen = true; break; }
default: { break; }
}
}
}
void
opengl_texture::downsize( GLuint const Format ) {
while( ( data_width > Global.iMaxTextureSize ) || ( data_height > Global.iMaxTextureSize ) ) {
// scale down the base texture, if it's larger than allowed maximum
// NOTE: scaling is uniform along both axes, meaning non-square textures can drop below the maximum
// TODO: replace with proper scaling function once we have image middleware in place
if( ( data_width < 2 ) || ( data_height < 2 ) ) {
// can't go any smaller
break;
}
WriteLog( "Texture size exceeds specified limits, downsampling data" );
switch( Format ) {
case GL_RGB: { downsample< glm::tvec3<std::uint8_t> >( data_width, data_height, data.data() ); break; }
case GL_BGRA:
case GL_RGBA: { downsample< glm::tvec4<std::uint8_t> >( data_width, data_height, data.data() ); break; }
default: { break; }
}
data_width /= 2;
data_height /= 2;
data.resize( data.size() / 4 ); // not strictly needed, but, eh
};
}
void
opengl_texture::flip_vertical() {
auto const swapsize { data_width * 4 };
auto destination { data.begin() + ( data_height - 1 ) * swapsize };
auto sampler { data.begin() };
for( auto row = 0; row < data_height / 2; ++row ) {
std::swap_ranges( sampler, sampler + swapsize, destination );
sampler += swapsize;
destination -= swapsize;
}
}
void
texture_manager::unit( GLint const Textureunit ) {
if( m_activeunit == Textureunit ) { return; }
m_activeunit = Textureunit;
::glActiveTexture( GL_TEXTURE0 + Textureunit );
}
// ustalenie numeru tekstury, wczytanie jeśli jeszcze takiej nie było
texture_handle
texture_manager::create( std::string Filename, bool const Loadnow ) {
if( Filename.find( '|' ) != std::string::npos )
Filename.erase( Filename.find( '|' ) ); // po | może być nazwa kolejnej tekstury
std::string traits;
auto const traitpos = Filename.find( ':' );
if( traitpos != std::string::npos ) {
// po dwukropku mogą być podane dodatkowe informacje niebędące nazwą tekstury
if( Filename.size() > traitpos + 1 )
traits = Filename.substr( traitpos + 1 );
Filename.erase( traitpos );
}
erase_extension( Filename );
if( Filename[ 0 ] == '/' ) {
// filename can potentially begin with a slash, and we don't need it
Filename.erase( 0, 1 );
}
// try to locate requested texture in the databank
auto lookup { find_in_databank( Filename ) };
if( lookup != npos ) {
return lookup;
}
// if we don't have the texture in the databank, check if it's on disk
auto const disklookup { find_on_disk( Filename ) };
if( true == disklookup.first.empty() ) {
// there's nothing matching in the databank nor on the disk, report failure
ErrorLog( "Bad file: failed do locate texture file \"" + Filename + "\"", logtype::file );
return npos;
}
auto texture = new opengl_texture();
texture->name = disklookup.first + disklookup.second;
if( Filename.find('#') != std::string::npos ) {
// temporary code for legacy assets -- textures with names beginning with # are to be sharpened
traits += '#';
}
texture->traits = traits;
auto const textureindex = (texture_handle)m_textures.size();
m_textures.emplace_back( texture, std::chrono::steady_clock::time_point() );
m_texturemappings.emplace( disklookup.first, textureindex );
WriteLog( "Created texture object for \"" + disklookup.first + disklookup.second + "\"", logtype::texture );
if( true == Loadnow ) {
texture_manager::texture( textureindex ).load();
#ifndef EU07_DEFERRED_TEXTURE_UPLOAD
texture_manager::texture( textureindex ).create();
// texture creation binds a different texture, force a re-bind on next use
m_activetexture = -1;
#endif
}
return textureindex;
};
void
texture_manager::bind( std::size_t const Unit, texture_handle const Texture ) {
m_textures[ Texture ].second = m_garbagecollector.timestamp();
if( Texture == m_units[ Unit ] ) {
// don't bind again what's already active
return;
}
// TBD, TODO: do binding in texture object, add support for other types than 2d
unit(Unit);
if( Texture != null_handle ) {
#ifndef EU07_DEFERRED_TEXTURE_UPLOAD
// NOTE: we could bind dedicated 'error' texture here if the id isn't valid
::glBindTexture( GL_TEXTURE_2D, texture(Texture).id );
m_units[ Unit ] = Texture;
#else
if( true == texture( Texture ).bind() ) {
m_units[ Unit ] = Texture;
}
else {
// TODO: bind a special 'error' texture on failure
::glBindTexture( GL_TEXTURE_2D, 0 );
m_units[ Unit ] = 0;
}
#endif
}
else {
::glBindTexture( GL_TEXTURE_2D, 0 );
m_units[ Unit ] = 0;
}
// all done
return;
}
void
texture_manager::delete_textures() {
for( auto const &texture : m_textures ) {
// usunięcie wszyskich tekstur (bez usuwania struktury)
if( ( texture.first->id > 0 )
&& ( texture.first->id != -1 ) ) {
::glDeleteTextures( 1, &(texture.first->id) );
}
delete texture.first;
}
}
// performs a resource sweep
void
texture_manager::update() {
if( m_garbagecollector.sweep() > 0 ) {
reset_unit_cache();
}
}
void texture_manager::reset_unit_cache()
{
for( auto &unit : m_units ) {
unit = -1;
}
}
// debug performance string
std::string
texture_manager::info() const {
// TODO: cache this data and update only during resource sweep
std::size_t totaltexturecount{ m_textures.size() - 1 };
std::size_t totaltexturesize{ 0 };
#ifdef EU07_DEFERRED_TEXTURE_UPLOAD
std::size_t readytexturecount{ 0 };
std::size_t readytexturesize{ 0 };
#endif
for( auto const& texture : m_textures ) {
totaltexturesize += texture.first->size;
#ifdef EU07_DEFERRED_TEXTURE_UPLOAD
if( texture.first->is_ready ) {
++readytexturecount;
readytexturesize += texture.first->size;
}
#endif
}
return
"; textures: "
#ifdef EU07_DEFERRED_TEXTURE_UPLOAD
+ std::to_string( readytexturecount )
+ " ("
+ to_string( readytexturesize / 1024.0f, 2 ) + " mb)"
+ " in vram, "
#endif
+ std::to_string( totaltexturecount )
+ " ("
+ to_string( totaltexturesize / 1024.0f, 2 ) + " mb)"
+ " total";
}
// checks whether specified texture is in the texture bank. returns texture id, or npos.
texture_handle
texture_manager::find_in_databank( std::string const &Texturename ) const {
std::vector<std::string> const filenames {
Global.asCurrentTexturePath + Texturename,
Texturename,
szTexturePath + Texturename };
for( auto const &filename : filenames ) {
auto const lookup { m_texturemappings.find( filename ) };
if( lookup != m_texturemappings.end() ) {
return lookup->second;
}
}
// all lookups failed
return npos;
}
// checks whether specified file exists.
std::pair<std::string, std::string>
texture_manager::find_on_disk( std::string const &Texturename ) const {
std::vector<std::string> const filenames {
Global.asCurrentTexturePath + Texturename,
Texturename,
szTexturePath + Texturename };
auto lookup =
FileExists(
filenames,
{ Global.szDefaultExt } );
if( false == lookup.first.empty() ) {
return lookup;
}
// if the first attempt fails, try entire extension list
// NOTE: slightly wasteful as it means preferred extension is tested twice, but, eh
return (
FileExists(
filenames,
{ ".dds", ".tga", ".png", ".bmp", ".ext" } ) );
}
//---------------------------------------------------------------------------
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