mirror/Aquaria
1
0
Fork 0
mirror of https://github.com/AquariaOSE/Aquaria.git synced 2024-12-24 13:45:47 +00:00
Code Issues Releases Wiki Activity

[vfs, #2] Move around some files (cleanup only)

Browse source
This commit is contained in:
fgenesis 2012-06-01 17:26:13 +02:00
parent a90f57afb0
commit 1709503344
8 changed files with 523 additions and 660 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

319
BBGE/glfont2.cpp
View file

@ -1,319 +0,0 @@
//*******************************************************************
//glfont2.cpp -- glFont Version 2.0 implementation
//Copyright (c) 1998-2002 Brad Fish
//See glfont.html for terms of use
//May 14, 2002
//*******************************************************************
//STL headers
#include <string>
#include <utility>
#include <iostream>
#include <fstream>
using namespace std;
//OpenGL headers
/*
#ifdef _WINDOWS
#include <windows.h>
#endif
#include <OpenGL/gl.h>
*/
#include "Base.h"
#include "SDL_endian.h"
//glFont header
#include "glfont2.h"
using namespace glfont;
static int read_int(ifstream &input)
{
int buffer;
input.read((char *)&buffer, 4);
return SDL_SwapLE32(buffer);
}
static float read_float(ifstream &input)
{
union
{
int i;
float f;
} buffer;
input.read((char *)&buffer.i, 4);
buffer.i = SDL_SwapLE32(buffer.i);
return buffer.f;
}
//*******************************************************************
//GLFont Class Implementation
//*******************************************************************
GLFont::GLFont ()
{
//Initialize header to safe state
header.tex = -1;
header.tex_width = 0;
header.tex_height = 0;
header.start_char = 0;
header.end_char = 0;
header.chars = NULL;
}
//*******************************************************************
GLFont::~GLFont ()
{
//Destroy the font
Destroy();
}
//*******************************************************************
bool GLFont::Create (const char *file_name, int tex, bool loadTexture)
{
ifstream input;
int num_chars, num_tex_bytes;
char *tex_bytes;
//Destroy the old font if there was one, just to be safe
Destroy();
//Open input file
input.open(file_name, ios::in | ios::binary);
if (!input)
return false;
// Read the header from file
header.tex = tex;
input.seekg(4, ios::cur); // skip tex field
header.tex_width = read_int(input);
header.tex_height = read_int(input);
header.start_char = read_int(input);
header.end_char = read_int(input);
input.seekg(4, ios::cur); // skip chars field
std::ostringstream os;
os << "tex_width: " << header.tex_width << " tex_height: " << header.tex_height;
debugLog(os.str());
//Allocate space for character array
num_chars = header.end_char - header.start_char + 1;
if ((header.chars = new GLFontChar[num_chars]) == NULL)
return false;
//Read character array
for (int i = 0; i < num_chars; i++)
{
header.chars[i].dx = read_float(input);
header.chars[i].dy = read_float(input);
header.chars[i].tx1 = read_float(input);
header.chars[i].ty1 = read_float(input);
header.chars[i].tx2 = read_float(input);
header.chars[i].ty2 = read_float(input);
}
//Read texture pixel data
num_tex_bytes = header.tex_width * header.tex_height * 2;
tex_bytes = new char[num_tex_bytes];
input.read(tex_bytes, num_tex_bytes);
//Build2DMipmaps(3, header.tex_width, header.tex_height, GL_UNSIGNED_BYTE, tex_bytes, 1);
if (loadTexture)
{
#ifdef BBGE_BUILD_OPENGL
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexImage2D(GL_TEXTURE_2D, 0, 2, header.tex_width,
header.tex_height, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE,
(void *)tex_bytes);
//gluBuild2DMipmaps(GL_TEXTURE_2D, 2, header.tex_width, header.tex_height, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, (void*)tex_bytes);
//Build2DMipmaps(3, header.tex_width, header.tex_height, GL_LUMINANCE_ALPHA, tex_bytes, 1);
//Create OpenGL texture
/*
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
//glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
*/
#endif
}
//Free texture pixels memory
delete[] tex_bytes;
//Close input file
input.close();
//Return successfully
return true;
}
//*******************************************************************
bool GLFont::Create (const std::string &file_name, int tex, bool loadTexture)
{
return Create(file_name.c_str(), tex);
}
//*******************************************************************
void GLFont::Destroy (void)
{
//Delete the character array if necessary
if (header.chars)
{
delete[] header.chars;
header.chars = NULL;
}
}
//*******************************************************************
void GLFont::GetTexSize (std::pair<int, int> *size)
{
//Retrieve texture size
size->first = header.tex_width;
size->second = header.tex_height;
}
//*******************************************************************
int GLFont::GetTexWidth (void)
{
//Return texture width
return header.tex_width;
}
//*******************************************************************
int GLFont::GetTexHeight (void)
{
//Return texture height
return header.tex_height;
}
//*******************************************************************
void GLFont::GetCharInterval (std::pair<int, int> *interval)
{
//Retrieve character interval
interval->first = header.start_char;
interval->second = header.end_char;
}
//*******************************************************************
int GLFont::GetStartChar (void)
{
//Return start character
return header.start_char;
}
//*******************************************************************
int GLFont::GetEndChar (void)
{
//Return end character
return header.end_char;
}
//*******************************************************************
void GLFont::GetCharSize (int c, std::pair<int, int> *size)
{
//Make sure character is in range
if (c < header.start_char || c > header.end_char)
{
//Not a valid character, so it obviously has no size
size->first = 0;
size->second = 0;
}
else
{
GLFontChar *glfont_char;
//Retrieve character size
glfont_char = &header.chars[c - header.start_char];
size->first = (int)(glfont_char->dx * header.tex_width);
size->second = (int)(glfont_char->dy *
header.tex_height);
}
}
//*******************************************************************
int GLFont::GetCharWidth (int c)
{
//Make sure in range
if (c < header.start_char || c > header.end_char)
return 0;
else
{
GLFontChar *glfont_char;
//Retrieve character width
glfont_char = &header.chars[c - header.start_char];
// hack to fix empty spaces
if (c == ' ' && glfont_char->dx <= 0)
{
GLFontChar *glfont_a = &header.chars['a' - header.start_char];
glfont_char->dx = glfont_a->dx*0.75;
glfont_char->dy = glfont_a->dy;
}
return (int)(glfont_char->dx * header.tex_width);
}
}
//*******************************************************************
int GLFont::GetCharHeight (int c)
{
//Make sure in range
if (c < header.start_char || c > header.end_char)
return 0;
else
{
GLFontChar *glfont_char;
//Retrieve character height
glfont_char = &header.chars[c - header.start_char];
return (int)(glfont_char->dy * header.tex_height);
}
}
//*******************************************************************
void GLFont::Begin (void)
{
#ifdef BBGE_BUILD_OPENGL
//Bind to font texture
glBindTexture(GL_TEXTURE_2D, header.tex);
#endif
}
//*******************************************************************
void GLFont::GetStringSize (const std::string &text, std::pair<int, int> *size)
{
unsigned int i;
char c;
GLFontChar *glfont_char;
float width;
//debugLog("size->second");
//Height is the same for now...might change in future
size->second = (int)(header.chars[header.start_char].dy *
header.tex_height);
//Calculate width of string
width = 0.0F;
for (i = 0; i < text.size(); i++)
{
//Make sure character is in range
c = (char)text[i];
if (c < header.start_char || c > header.end_char)
continue;
//Get pointer to glFont character
glfont_char = &header.chars[c - header.start_char];
//Get width and height
width += glfont_char->dx * header.tex_width;
}
//Save width
//debugLog("size first");
size->first = (int)width;
//debugLog("done");
}
//End of file

146
BBGE/glfont2.h
View file

@ -1,146 +0,0 @@
//*******************************************************************
//glfont2.h -- Header for glfont2.cpp
//Copyright (c) 1998-2002 Brad Fish
//See glfont.html for terms of use
//May 14, 2002
//*******************************************************************
#ifndef GLFONT2_H
#define GLFONT2_H
#include <assert.h>
//*******************************************************************
//GLFont Interface
//*******************************************************************
//glFont namespace
namespace glfont
{
class GLFont;
}
//glFont class
class glfont::GLFont
{
private:
//glFont character structure
typedef struct
{
float dx, dy;
float tx1, ty1;
float tx2, ty2;
} GLFontChar;
//glFont header structure
struct
{
int tex;
int tex_width, tex_height;
int start_char, end_char;
GLFontChar *chars;
} header;
public:
//Constructor
GLFont ();
//Destructor
~GLFont ();
public:
//Creates the glFont
bool Create (const char *file_name, int tex, bool loadTexture=true);
bool Create (const std::string &file_name, int tex, bool loadTexture=true);
//Destroys the glFont
void Destroy (void);
//Texture size retrieval methods
void GetTexSize (std::pair<int, int> *size);
int GetTexWidth (void);
int GetTexHeight (void);
//Character interval retrieval methods
void GetCharInterval (std::pair<int, int> *interval);
int GetStartChar (void);
int GetEndChar (void);
//Character size retrieval methods
void GetCharSize (int c, std::pair<int, int> *size);
int GetCharWidth (int c);
int GetCharHeight (int c);
void GetStringSize (const std::string &text, std::pair<int, int> *size);
//Begins text output with this font
void Begin (void);
//Template function to output a scaled, colored std::basic_string
template<class T> void DrawString (
const std::basic_string<T> &text, float scalar, float x,
float y, const float *top_color, const float *bottom_color, float alpha, float lastAlpha)
{
unsigned int i;
T c;
GLFontChar *glfont_char;
float width, height;
//Begin rendering quads
glBegin(GL_QUADS);
int sz = text.size();
float a = 0;
//Loop through characters
for (i = 0; i < sz; i++)
{
//Make sure character is in range
c = text[i];
if (c < header.start_char || c > header.end_char)
continue;
//Get pointer to glFont character
glfont_char = &header.chars[c - header.start_char];
//Get width and height
width = (glfont_char->dx * header.tex_width) * scalar;
height = (glfont_char->dy * header.tex_height) * scalar;
if (i == (sz-1))
a = alpha*lastAlpha;
else
a = alpha;
//Specify colors, vertices, and texture coordinates
glColor4f(top_color[0], top_color[1], top_color[2], a);
glTexCoord2f(glfont_char->tx1, glfont_char->ty1);
glVertex3f(x, y, 0.0F);
glTexCoord2f(glfont_char->tx2, glfont_char->ty1);
glVertex3f(x + width, y, 0.0F);
glColor4f(bottom_color[0], bottom_color[1], bottom_color[2], a);
glTexCoord2f(glfont_char->tx2, glfont_char->ty2);
glVertex3f(x + width, y + height, 0.0F);
glTexCoord2f(glfont_char->tx1, glfont_char->ty2);
glVertex3f(x, y + height, 0.0F);
//Move to next character
x += width;
}
//Stop rendering quads
glEnd();
}
};
//*******************************************************************
#endif
//End of file

19
BBGE/ByteBuffer.h → ExternalLibs/ByteBuffer.h
View file

@ -1,17 +1,24 @@
#ifndef BYTEBUFFER_H #ifndef BYTEBUFFER_H
#define BYTEBUFFER_H #define BYTEBUFFER_H
#include <stdlib.h>
#include <string.h> // for memcpy #include <string.h> // for memcpy
#include <stdio.h>
#include <string>
// ** compatibility stuff for BBGE .... ** // ** compatibility stuff for BBGE .... **
#include "Base.h"
#define BYTEBUFFER_NO_EXCEPTIONS #define BYTEBUFFER_NO_EXCEPTIONS
#if (defined(BBGE_BUILD_SDL) && (SDL_BYTEORDER == SDL_BIG_ENDIAN)) // from SDL headers
# define BB_IS_BIG_ENDIAN #if defined(__hppa__) || \
defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
(defined(__MIPS__) && defined(__MISPEB__)) || \
defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || \
defined(__sparc__)
#define BB_IS_BIG_ENDIAN 1
#endif #endif
// **** // ****
@ -98,9 +105,9 @@ public:
}; };
#ifdef BYTEBUFFER_NO_EXCEPTIONS #ifdef BYTEBUFFER_NO_EXCEPTIONS
#define BYTEBUFFER_EXCEPT(bb, desc, sz) { Exception __e(bb, desc, sz); char errbuf[256]; \ #define BYTEBUFFER_EXCEPT(bb, desc, sz) { Exception __e(bb, desc, sz); \
sprintf(errbuf, "Exception in ByteBuffer: '%s', rpos: %u, wpos: %u, cursize: %u, sizeparam: %u", \ fprintf(stderr, "Exception in ByteBuffer: '%s', rpos: %u, wpos: %u, cursize: %u, sizeparam: %u", \
__e.action, __e.rpos, __e.wpos, __e.cursize, __e.sizeparam); errorLog(errbuf); abort(); } __e.action, __e.rpos, __e.wpos, __e.cursize, __e.sizeparam); abort(); }
#else #else
#define BYTEBUFFER_EXCEPT(bb, desc, sz) throw Exception(bb, desc, sz) #define BYTEBUFFER_EXCEPT(bb, desc, sz) throw Exception(bb, desc, sz)
#endif #endif

41
BBGE/DeflateCompressor.cpp → ExternalLibs/DeflateCompressor.cpp
View file

@ -1,4 +1,3 @@
#include "Base.h"
#include <zlib.h> #include <zlib.h>
@ -7,6 +6,8 @@
// for weird gcc/mingw hackfix below // for weird gcc/mingw hackfix below
#include <string.h> #include <string.h>
#define PRINTFAIL(s, ...) fprintf(stderr, (s "\n"), __VA_ARGS__)
DeflateCompressor::DeflateCompressor() DeflateCompressor::DeflateCompressor()
: _windowBits(-MAX_WBITS), // negative, because we want a raw deflate stream, and not zlib-wrapped : _windowBits(-MAX_WBITS), // negative, because we want a raw deflate stream, and not zlib-wrapped
@ -49,30 +50,25 @@ void DeflateCompressor::compress(void* dst, uint32 *dst_size, const void* src, u
c_stream.next_in = (Bytef*)src; c_stream.next_in = (Bytef*)src;
c_stream.avail_in = (uInt)src_size; c_stream.avail_in = (uInt)src_size;
if (Z_OK != deflate(&c_stream, Z_NO_FLUSH)) int ret = deflate(&c_stream, Z_FINISH);
{
errorLog("ZLIB: Can't compress (zlib: deflate)");
*dst_size = 0;
return;
}
if (c_stream.avail_in != 0) switch(ret)
{ {
errorLog("Can't compress (zlib: deflate not greedy)"); case Z_STREAM_END:
*dst_size = 0; break; // all good
return; case Z_OK:
} PRINTFAIL("ZLIB: Output buffer not large enough");
*dst_size = 0;
if (Z_STREAM_END != deflate(&c_stream, Z_FINISH)) return;
{ default:
errorLog("Can't compress (zlib: deflate, finish)"); PRINTFAIL("ZLIB: Error %d", ret);
*dst_size = 0; *dst_size = 0;
return; return;
} }
if (Z_OK != deflateEnd(&c_stream)) if (Z_OK != deflateEnd(&c_stream))
{ {
errorLog("Can't compress (zlib: deflateEnd)"); PRINTFAIL("Can't compress (zlib: deflateEnd)");
*dst_size = 0; *dst_size = 0;
return; return;
} }
@ -167,9 +163,7 @@ void DeflateCompressor::Decompress(void)
decompress((void*)target, &origsize, (const void*)contents(), size(), _windowBits); decompress((void*)target, &origsize, (const void*)contents(), size(), _windowBits);
if(origsize != rs) if(origsize != rs)
{ {
char errbuf[256]; PRINTFAIL("DeflateCompressor: Inflate error! cursize=%u origsize=%u realsize=%u",size(),origsize,rs);
sprintf(errbuf, "DeflateCompressor: Inflate error! cursize=%u origsize=%u realsize=%u",size(),origsize,rs);
errorLog(errbuf);
delete [] target; delete [] target;
return; return;
} }
@ -178,7 +172,7 @@ void DeflateCompressor::Decompress(void)
delete [] target; delete [] target;
_real_size = 0; _real_size = 0;
_iscompressed = false; _iscompressed = false;
} }
} }
@ -216,6 +210,7 @@ int DeflateCompressor::decompressBlockwise()
switch (ret) { switch (ret) {
case Z_NEED_DICT: case Z_NEED_DICT:
case Z_STREAM_ERROR: case Z_STREAM_ERROR:
case Z_BUF_ERROR:
ret = Z_DATA_ERROR; /* and fall through */ ret = Z_DATA_ERROR; /* and fall through */
case Z_DATA_ERROR: case Z_DATA_ERROR:
case Z_MEM_ERROR: case Z_MEM_ERROR:

2
BBGE/DeflateCompressor.h → ExternalLibs/DeflateCompressor.h
View file

@ -8,13 +8,13 @@ class DeflateCompressor : public ByteBuffer
{ {
public: public:
DeflateCompressor(); DeflateCompressor();
DeflateCompressor(void *buf, uint32 size, Mode mode = COPY, delete_func del = NULL, uint32 extra = 0);
virtual ~DeflateCompressor() {} virtual ~DeflateCompressor() {}
virtual void Compress(uint8 level = 1); virtual void Compress(uint8 level = 1);
virtual void Decompress(void); virtual void Decompress(void);
bool Compressed(void) const { return _iscompressed; } bool Compressed(void) const { return _iscompressed; }
void Compressed(bool b) { _iscompressed = b; } void Compressed(bool b) { _iscompressed = b; }
void SetForceCompression(bool f) { _forceCompress = f; }
uint32 RealSize(void) const { return _iscompressed ? _real_size : size(); } uint32 RealSize(void) const { return _iscompressed ? _real_size : size(); }
void RealSize(uint32 realsize) { _real_size = realsize; } void RealSize(uint32 realsize) { _real_size = realsize; }
void clear(void) // not required to be strictly virtual; be careful not to mess up static types! void clear(void) // not required to be strictly virtual; be careful not to mess up static types!

84
ExternalLibs/glfont2/glfont2.cpp
View file

@ -7,9 +7,8 @@
//STL headers //STL headers
#include <string> #include <string>
#include <utility> #include "FileAPI.h"
#include <iostream> #include "ByteBuffer.h"
#include <fstream>
using namespace std; using namespace std;
//OpenGL headers //OpenGL headers
@ -22,33 +21,10 @@ using namespace std;
#include "GL/gl.h" #include "GL/gl.h"
#include "SDL_endian.h"
//glFont header //glFont header
#include "glfont2.h" #include "glfont2.h"
using namespace glfont; using namespace glfont;
static int read_int(ifstream &input)
{
int buffer;
input.read((char *)&buffer, 4);
return SDL_SwapLE32(buffer);
}
static float read_float(ifstream &input)
{
union
{
int i;
float f;
} buffer;
input.read((char *)&buffer.i, 4);
buffer.i = SDL_SwapLE32(buffer.i);
return buffer.f;
}
//******************************************************************* //*******************************************************************
//GLFont Class Implementation //GLFont Class Implementation
//******************************************************************* //*******************************************************************
@ -71,27 +47,44 @@ GLFont::~GLFont ()
//******************************************************************* //*******************************************************************
bool GLFont::Create (const char *file_name, int tex, bool loadTexture) bool GLFont::Create (const char *file_name, int tex, bool loadTexture)
{ {
ifstream input;
int num_chars, num_tex_bytes; int num_chars, num_tex_bytes;
char *tex_bytes; char *tex_bytes;
//Destroy the old font if there was one, just to be safe //Destroy the old font if there was one, just to be safe
Destroy(); Destroy();
#ifdef BBGE_BUILD_VFS
//Open input file //Open input file
input.open(file_name, ios::in | ios::binary); ttvfs::VFSFile *vf = vfs.GetFile(file_name);
if (!input) if (!vf)
return false; return false;
ByteBuffer bb((void*)vf->getBuf(), vf->size(), ByteBuffer::TAKE_OVER);
vf->dropBuf(false);
#else
VFILE *fh = vfopen(file_name, "rb");
if (!fh)
return false;
vfseek(fh, 0, SEEK_END);
long int sz = vftell(fh);
vfseek(fh, 0, SEEK_SET);
ByteBuffer bb(sz);
bb.resize(sz);
vfread(bb.contents(), 1, sz, fh);
vfclose(fh);
#endif
int dummy;
// Read the header from file // Read the header from file
header.tex = tex; header.tex = tex;
input.seekg(4, ios::cur); // skip tex field bb >> dummy; // skip tex field
header.tex_width = read_int(input); bb >> header.tex_width;
header.tex_height = read_int(input); bb >> header.tex_height;
header.start_char = read_int(input); bb >> header.start_char;
header.end_char = read_int(input); bb >> header.end_char;
input.seekg(4, ios::cur); // skip chars field bb >> dummy; // skip chars field
//Allocate space for character array //Allocate space for character array
num_chars = header.end_char - header.start_char + 1; num_chars = header.end_char - header.start_char + 1;
if ((header.chars = new GLFontChar[num_chars]) == NULL) if ((header.chars = new GLFontChar[num_chars]) == NULL)
@ -100,19 +93,19 @@ bool GLFont::Create (const char *file_name, int tex, bool loadTexture)
//Read character array //Read character array
for (int i = 0; i < num_chars; i++) for (int i = 0; i < num_chars; i++)
{ {
header.chars[i].dx = read_float(input); bb >> header.chars[i].dx;
header.chars[i].dy = read_float(input); bb >> header.chars[i].dy;
header.chars[i].tx1 = read_float(input); bb >> header.chars[i].tx1;
header.chars[i].ty1 = read_float(input); bb >> header.chars[i].ty1;
header.chars[i].tx2 = read_float(input); bb >> header.chars[i].tx2;
header.chars[i].ty2 = read_float(input); bb >> header.chars[i].ty2;
} }
//Read texture pixel data //Read texture pixel data
num_tex_bytes = header.tex_width * header.tex_height * 2; num_tex_bytes = header.tex_width * header.tex_height * 2;
tex_bytes = new char[num_tex_bytes]; tex_bytes = new char[num_tex_bytes];
input.read(tex_bytes, num_tex_bytes); //input.read(tex_bytes, num_tex_bytes);
bb.read(tex_bytes, num_tex_bytes);
//Build2DMipmaps(3, header.tex_width, header.tex_height, GL_UNSIGNED_BYTE, tex_bytes, 1); //Build2DMipmaps(3, header.tex_width, header.tex_height, GL_UNSIGNED_BYTE, tex_bytes, 1);
@ -147,9 +140,6 @@ bool GLFont::Create (const char *file_name, int tex, bool loadTexture)
//Free texture pixels memory //Free texture pixels memory
delete[] tex_bytes; delete[] tex_bytes;
//Close input file
input.close();
//Return successfully //Return successfully
return true; return true;
} }

2
ExternalLibs/glpng.h
View file

@ -97,9 +97,11 @@ extern int APIENTRY pngLoadRawF(FILE *file, pngRawInfo *rawinfo);
extern int APIENTRY pngLoad(const char *filename, int mipmap, int trans, pngInfo *info); extern int APIENTRY pngLoad(const char *filename, int mipmap, int trans, pngInfo *info);
extern int APIENTRY pngLoadF(FILE *file, int mipmap, int trans, pngInfo *info); extern int APIENTRY pngLoadF(FILE *file, int mipmap, int trans, pngInfo *info);
extern int APIENTRY pngLoadMem(const char *mem, int size, int mipmap, int trans, pngInfo *info);
extern unsigned int APIENTRY pngBind(const char *filename, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter); extern unsigned int APIENTRY pngBind(const char *filename, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter);
extern unsigned int APIENTRY pngBindF(FILE *file, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter); extern unsigned int APIENTRY pngBindF(FILE *file, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter);
extern unsigned int APIENTRY pngBindMem(const char *mem, int size, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter);
extern void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue); extern void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue);
extern void APIENTRY pngSetAlphaCallback(unsigned char (*callback)(unsigned char red, unsigned char green, unsigned char blue)); extern void APIENTRY pngSetAlphaCallback(unsigned char (*callback)(unsigned char red, unsigned char green, unsigned char blue));

570
ExternalLibs/glpng/glpng.c
View file

@ -1,29 +1,29 @@
/* /*
* PNG loader library for OpenGL v1.45 (10/07/00) * PNG loader library for OpenGL v1.45 (10/07/00)
* by Ben Wyatt ben@wyatt100.freeserve.co.uk * by Ben Wyatt ben@wyatt100.freeserve.co.uk
* Using LibPNG 1.0.2 and ZLib 1.1.3 * Using LibPNG 1.0.2 and ZLib 1.1.3
* *
* This software is provided 'as-is', without any express or implied warranty. * This software is provided 'as-is', without any express or implied warranty.
* In no event will the author be held liable for any damages arising from the * In no event will the author be held liable for any damages arising from the
* use of this software. * use of this software.
* *
* Permission is hereby granted to use, copy, modify, and distribute this * Permission is hereby granted to use, copy, modify, and distribute this
* source code, or portions hereof, for any purpose, without fee, subject to * source code, or portions hereof, for any purpose, without fee, subject to
* the following restrictions: * the following restrictions:
* *
* 1. The origin of this source code must not be misrepresented. You must not * 1. The origin of this source code must not be misrepresented. You must not
* claim that you wrote the original software. If you use this software in * claim that you wrote the original software. If you use this software in
* a product, an acknowledgment in the product documentation would be * a product, an acknowledgment in the product documentation would be
* appreciated but is not required. * appreciated but is not required.
* 2. Altered versions must be plainly marked as such and must not be * 2. Altered versions must be plainly marked as such and must not be
* misrepresented as being the original source. * misrepresented as being the original source.
* 3. This notice must not be removed or altered from any source distribution. * 3. This notice must not be removed or altered from any source distribution.
*/ */
#ifdef _WIN32 /* Stupid Windows needs to include windows.h before gl.h */ #ifdef _WIN32 /* Stupid Windows needs to include windows.h before gl.h */
#undef FAR #undef FAR
#include <windows.h> #include <windows.h>
#endif #endif
#include "../glpng.h" #include "../glpng.h"
@ -55,17 +55,17 @@ static int PalettedTextures = -1;
static GLint MaxTextureSize = 0; static GLint MaxTextureSize = 0;
/* screenGamma = displayGamma/viewingGamma /* screenGamma = displayGamma/viewingGamma
* displayGamma = CRT has gamma of ~2.2 * displayGamma = CRT has gamma of ~2.2
* viewingGamma depends on platform. PC is 1.0, Mac is 1.45, SGI defaults * viewingGamma depends on platform. PC is 1.0, Mac is 1.45, SGI defaults
* to 1.7, but this can be checked and changed w/ /usr/sbin/gamma command. * to 1.7, but this can be checked and changed w/ /usr/sbin/gamma command.
* If the environment variable VIEWING_GAMMA is set, adjust gamma per this value. * If the environment variable VIEWING_GAMMA is set, adjust gamma per this value.
*/ */
#ifdef _MAC #ifdef _MAC
static double screenGamma = 2.2 / 1.45; static double screenGamma = 2.2 / 1.45;
#elif SGI #elif SGI
static double screenGamma = 2.2 / 1.7; static double screenGamma = 2.2 / 1.7;
#else /* PC/default */ #else /* PC/default */
static double screenGamma = 2.2 / 1.0; static double screenGamma = 2.2 / 1.0;
#endif #endif
static char gammaExplicit = 0; /*if */ static char gammaExplicit = 0; /*if */
@ -259,8 +259,8 @@ int APIENTRY pngLoadRawF(FILE *fp, pngRawInfo *pinfo) {
png_infop info; png_infop info;
png_infop endinfo; png_infop endinfo;
png_bytep data; png_bytep data;
png_bytep *row_p; png_bytep *row_p;
double fileGamma; double fileGamma;
png_uint_32 width, height; png_uint_32 width, height;
int depth, color; int depth, color;
@ -365,8 +365,8 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
png_infop info; png_infop info;
png_infop endinfo; png_infop endinfo;
png_bytep data, data2; png_bytep data, data2;
png_bytep *row_p; png_bytep *row_p;
double fileGamma; double fileGamma;
png_uint_32 width, height, rw, rh; png_uint_32 width, height, rw, rh;
int depth, color; int depth, color;
@ -402,20 +402,20 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
if (MaxTextureSize == 0) if (MaxTextureSize == 0)
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxTextureSize); glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxTextureSize);
#ifdef SUPPORTS_PALETTE_EXT #ifdef SUPPORTS_PALETTE_EXT
#ifdef _WIN32 #ifdef _WIN32
if (PalettedTextures == -1) if (PalettedTextures == -1)
PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL); PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL);
if (PalettedTextures) { if (PalettedTextures) {
if (glColorTableEXT == NULL) { if (glColorTableEXT == NULL) {
glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT"); glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
if (glColorTableEXT == NULL) if (glColorTableEXT == NULL)
PalettedTextures = 0; PalettedTextures = 0;
}
} }
#endif }
#endif #endif
#endif
if (PalettedTextures == -1) if (PalettedTextures == -1)
PalettedTextures = 0; PalettedTextures = 0;
@ -461,10 +461,10 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
data2 = (png_bytep) malloc(rw*rh*channels); data2 = (png_bytep) malloc(rw*rh*channels);
/* Doesn't work on certain sizes */ /* Doesn't work on certain sizes */
/* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0) /* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0)
return 0; return 0;
*/ */
Resize(channels, data, width, height, data2, rw, rh); Resize(channels, data, width, height, data2, rw, rh);
width = rw, height = rh; width = rw, height = rh;
@ -478,7 +478,7 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
glPixelStorei(GL_PACK_ALIGNMENT, 1); glPixelStorei(GL_PACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
#ifdef SUPPORTS_PALETTE_EXT #ifdef SUPPORTS_PALETTE_EXT
if (PalettedTextures && mipmap >= 0 && trans == PNG_SOLID && color == PNG_COLOR_TYPE_PALETTE) { if (PalettedTextures && mipmap >= 0 && trans == PNG_SOLID && color == PNG_COLOR_TYPE_PALETTE) {
png_colorp pal; png_colorp pal;
int cols; int cols;
@ -502,12 +502,12 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
glTexImage2D(GL_TEXTURE_2D, mipmap, intf, width, height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, data); glTexImage2D(GL_TEXTURE_2D, mipmap, intf, width, height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, data);
} }
else else
#endif #endif
if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) { if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) {
GLenum glformat; GLenum glformat;
GLint glcomponent; GLint glcomponent;
switch (color) { switch (color) {
case PNG_COLOR_TYPE_GRAY: case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_RGB: case PNG_COLOR_TYPE_RGB:
case PNG_COLOR_TYPE_PALETTE: case PNG_COLOR_TYPE_PALETTE:
@ -526,48 +526,48 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
default: default:
/*puts("glformat not set");*/ /*puts("glformat not set");*/
return 0; return 0;
}
if (trans == PNG_LUMINANCEALPHA)
glformat = GL_LUMINANCE_ALPHA;
if (mipmap == PNG_BUILDMIPMAPS)
Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
} }
else {
png_bytep p, endp, q;
int r, g, b, a;
if (trans == PNG_LUMINANCEALPHA) p = data, endp = p+width*height*3;
glformat = GL_LUMINANCE_ALPHA; q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4);
if (mipmap == PNG_BUILDMIPMAPS) if (pinfo != NULL) pinfo->Alpha = 8;
Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
}
else {
png_bytep p, endp, q;
int r, g, b, a;
p = data, endp = p+width*height*3; #define FORSTART \
q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4); do { \
r = *p++; /*red */ \
g = *p++; /*green*/ \
b = *p++; /*blue */ \
*q++ = r; \
*q++ = g; \
*q++ = b;
if (pinfo != NULL) pinfo->Alpha = 8; #define FOREND \
q++; \
} while (p != endp);
#define FORSTART \ #define ALPHA *q
do { \
r = *p++; /*red */ \
g = *p++; /*green*/ \
b = *p++; /*blue */ \
*q++ = r; \
*q++ = g; \
*q++ = b;
#define FOREND \ switch (trans) {
q++; \
} while (p != endp);
#define ALPHA *q
switch (trans) {
case PNG_CALLBACKT: case PNG_CALLBACKT:
FORSTART FORSTART
ALPHA = AlphaCallback((unsigned char) r, (unsigned char) g, (unsigned char) b); ALPHA = AlphaCallback((unsigned char) r, (unsigned char) g, (unsigned char) b);
FOREND FOREND
break; break;
case PNG_STENCIL: case PNG_STENCIL:
FORSTART FORSTART
@ -576,76 +576,76 @@ int APIENTRY pngLoadF(FILE *fp, int mipmap, int trans, pngInfo *pinfo) {
else else
ALPHA = 255; ALPHA = 255;
FOREND FOREND
break; break;
case PNG_BLEND1: case PNG_BLEND1:
FORSTART FORSTART
a = r+g+b; a = r+g+b;
if (a > 255) ALPHA = 255; else ALPHA = a; if (a > 255) ALPHA = 255; else ALPHA = a;
FOREND FOREND
break; break;
case PNG_BLEND2: case PNG_BLEND2:
FORSTART FORSTART
a = r+g+b; a = r+g+b;
if (a > 255*2) ALPHA = 255; else ALPHA = a/2; if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
FOREND FOREND
break; break;
case PNG_BLEND3: case PNG_BLEND3:
FORSTART FORSTART
ALPHA = (r+g+b)/3; ALPHA = (r+g+b)/3;
FOREND FOREND
break; break;
case PNG_BLEND4: case PNG_BLEND4:
FORSTART FORSTART
a = r*r+g*g+b*b; a = r*r+g*g+b*b;
if (a > 255) ALPHA = 255; else ALPHA = a; if (a > 255) ALPHA = 255; else ALPHA = a;
FOREND FOREND
break; break;
case PNG_BLEND5: case PNG_BLEND5:
FORSTART FORSTART
a = r*r+g*g+b*b; a = r*r+g*g+b*b;
if (a > 255*2) ALPHA = 255; else ALPHA = a/2; if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
FOREND FOREND
break; break;
case PNG_BLEND6: case PNG_BLEND6:
FORSTART FORSTART
a = r*r+g*g+b*b; a = r*r+g*g+b*b;
if (a > 255*3) ALPHA = 255; else ALPHA = a/3; if (a > 255*3) ALPHA = 255; else ALPHA = a/3;
FOREND FOREND
break; break;
case PNG_BLEND7: case PNG_BLEND7:
FORSTART FORSTART
a = r*r+g*g+b*b; a = r*r+g*g+b*b;
if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a); if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a);
FOREND FOREND
break; break;
}
#undef FORSTART
#undef FOREND
#undef ALPHA
if (mipmap == PNG_BUILDMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
free(data2);
} }
#undef FORSTART glPixelStorei(GL_PACK_ALIGNMENT, pack);
#undef FOREND glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
#undef ALPHA
if (mipmap == PNG_BUILDMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
free(data2);
}
glPixelStorei(GL_PACK_ALIGNMENT, pack);
glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
} /* OpenGL end */ } /* OpenGL end */
png_read_end(png, endinfo); png_read_end(png, endinfo);
png_destroy_read_struct(&png, &info, &endinfo); png_destroy_read_struct(&png, &info, &endinfo);
free(data); free(data);
@ -684,6 +684,14 @@ unsigned int APIENTRY pngBindF(FILE *file, int mipmap, int trans, pngInfo *info,
return 0; return 0;
} }
unsigned int APIENTRY pngBindMem(const char *mem, int size, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter) {
unsigned int id = SetParams(wrapst, magfilter, minfilter);
if (id != 0 && pngLoadMem(mem, size, mipmap, trans, info))
return id;
return 0;
}
void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue) { void APIENTRY pngSetStencil(unsigned char red, unsigned char green, unsigned char blue) {
StencilRed = red, StencilGreen = green, StencilBlue = blue; StencilRed = red, StencilGreen = green, StencilBlue = blue;
} }
@ -710,3 +718,329 @@ void APIENTRY pngSetStandardOrientation(int standardorientation) {
StandardOrientation = standardorientation; StandardOrientation = standardorientation;
} }
// -- added memory read functions --
/*pointer to a new input function that takes as its
arguments a pointer to a png_struct, a pointer to
a location where input data can be stored, and a 32-bit
unsigned int that is the number of bytes to be read.
To exit and output any fatal error messages the new write
function should call png_error(png_ptr, "Error msg"). */
typedef struct glpng_memread_struct
{
png_bytep mem;
png_size_t rpos;
} glpng_memread;
void glpng_read_mem(png_structp png, png_bytep dst, png_size_t size)
{
glpng_memread *mr = (glpng_memread*)png_get_io_ptr(png);
memcpy(dst, mr->mem + mr->rpos, size);
mr->rpos += size;
}
int APIENTRY pngLoadMem(const char *mem, int size, int mipmap, int trans, pngInfo *pinfo) {
GLint pack, unpack;
unsigned char header[8];
png_structp png;
png_infop info;
png_infop endinfo;
png_bytep data, data2;
png_bytep *row_p;
double fileGamma;
png_uint_32 width, height, rw, rh;
int depth, color;
png_uint_32 i;
glpng_memread memread;
if(size < 8)
return 0; // error
memcpy(header, mem, 8);
if (!png_check_sig(header, 8))
return 0;
png = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
info = png_create_info_struct(png);
endinfo = png_create_info_struct(png);
// DH: added following lines
if (setjmp(png_jmpbuf(png)))
{
png_destroy_read_struct(&png, &info, &endinfo);
return 0;
}
// ~DH
memread.rpos = 0;
memread.mem = ((png_bytep)mem) + 8;
png_set_read_fn(png, &memread, glpng_read_mem);
png_set_sig_bytes(png, 8);
png_read_info(png, info);
png_get_IHDR(png, info, &width, &height, &depth, &color, NULL, NULL, NULL);
if (pinfo != NULL) {
pinfo->Width = width;
pinfo->Height = height;
pinfo->Depth = depth;
}
if (MaxTextureSize == 0)
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &MaxTextureSize);
#ifdef SUPPORTS_PALETTE_EXT
#ifdef _WIN32
if (PalettedTextures == -1)
PalettedTextures = ExtSupported("GL_EXT_paletted_texture") && (strstr((const char *) glGetString(GL_VERSION), "1.1.0 3Dfx Beta") == NULL);
if (PalettedTextures) {
if (glColorTableEXT == NULL) {
glColorTableEXT = (PFNGLCOLORTABLEEXTPROC) wglGetProcAddress("glColorTableEXT");
if (glColorTableEXT == NULL)
PalettedTextures = 0;
}
}
#endif
#endif
if (PalettedTextures == -1)
PalettedTextures = 0;
if (color == PNG_COLOR_TYPE_GRAY || color == PNG_COLOR_TYPE_GRAY_ALPHA)
png_set_gray_to_rgb(png);
if (color&PNG_COLOR_MASK_ALPHA && trans != PNG_ALPHA) {
png_set_strip_alpha(png);
color &= ~PNG_COLOR_MASK_ALPHA;
}
if (!(PalettedTextures && mipmap >= 0 && trans == PNG_SOLID))
if (color == PNG_COLOR_TYPE_PALETTE)
png_set_expand(png);
/*--GAMMA--*/
checkForGammaEnv();
if (png_get_gAMA(png, info, &fileGamma))
png_set_gamma(png, screenGamma, fileGamma);
else
png_set_gamma(png, screenGamma, 1.0/2.2);
png_read_update_info(png, info);
data = (png_bytep) malloc(png_get_rowbytes(png, info)*height);
row_p = (png_bytep *) malloc(sizeof(png_bytep)*height);
for (i = 0; i < height; i++) {
if (StandardOrientation)
row_p[height - 1 - i] = &data[png_get_rowbytes(png, info)*i];
else
row_p[i] = &data[png_get_rowbytes(png, info)*i];
}
png_read_image(png, row_p);
free(row_p);
rw = SafeSize(width), rh = SafeSize(height);
if (rw != width || rh != height) {
const int channels = png_get_rowbytes(png, info)/width;
data2 = (png_bytep) malloc(rw*rh*channels);
/* Doesn't work on certain sizes */
/* if (gluScaleImage(glformat, width, height, GL_UNSIGNED_BYTE, data, rw, rh, GL_UNSIGNED_BYTE, data2) != 0)
return 0;
*/
Resize(channels, data, width, height, data2, rw, rh);
width = rw, height = rh;
free(data);
data = data2;
}
{ /* OpenGL stuff */
glGetIntegerv(GL_PACK_ALIGNMENT, &pack);
glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpack);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
#ifdef SUPPORTS_PALETTE_EXT
if (PalettedTextures && mipmap >= 0 && trans == PNG_SOLID && color == PNG_COLOR_TYPE_PALETTE) {
png_colorp pal;
int cols;
GLint intf;
if (pinfo != NULL) pinfo->Alpha = 0;
png_get_PLTE(png, info, &pal, &cols);
switch (cols) {
case 1<<1: intf = GL_COLOR_INDEX1_EXT; break;
case 1<<2: intf = GL_COLOR_INDEX2_EXT; break;
case 1<<4: intf = GL_COLOR_INDEX4_EXT; break;
case 1<<8: intf = GL_COLOR_INDEX8_EXT; break;
case 1<<12: intf = GL_COLOR_INDEX12_EXT; break;
case 1<<16: intf = GL_COLOR_INDEX16_EXT; break;
default:
/*printf("Warning: Colour depth %i not recognised\n", cols);*/
return 0;
}
glColorTableEXT(GL_TEXTURE_2D, GL_RGB8, cols, GL_RGB, GL_UNSIGNED_BYTE, pal);
glTexImage2D(GL_TEXTURE_2D, mipmap, intf, width, height, 0, GL_COLOR_INDEX, GL_UNSIGNED_BYTE, data);
}
else
#endif
if (trans == PNG_SOLID || trans == PNG_ALPHA || trans == PNG_LUMINANCEALPHA || color == PNG_COLOR_TYPE_RGB_ALPHA || color == PNG_COLOR_TYPE_GRAY_ALPHA) {
GLenum glformat;
GLint glcomponent;
switch (color) {
case PNG_COLOR_TYPE_GRAY:
case PNG_COLOR_TYPE_RGB:
case PNG_COLOR_TYPE_PALETTE:
glformat = GL_RGB;
glcomponent = 3;
if (pinfo != NULL) pinfo->Alpha = 0;
break;
case PNG_COLOR_TYPE_GRAY_ALPHA:
case PNG_COLOR_TYPE_RGB_ALPHA:
glformat = GL_RGBA;
glcomponent = 4;
if (pinfo != NULL) pinfo->Alpha = 8;
break;
default:
/*puts("glformat not set");*/
return 0;
}
if (trans == PNG_LUMINANCEALPHA)
glformat = GL_LUMINANCE_ALPHA;
if (mipmap == PNG_BUILDMIPMAPS)
Build2DMipmaps(glcomponent, width, height, glformat, data, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(glcomponent, width, height, glformat, data, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, glcomponent, width, height, 0, glformat, GL_UNSIGNED_BYTE, data);
}
else {
png_bytep p, endp, q;
int r, g, b, a;
p = data, endp = p+width*height*3;
q = data2 = (png_bytep) malloc(sizeof(png_byte)*width*height*4);
if (pinfo != NULL) pinfo->Alpha = 8;
#define FORSTART \
do { \
r = *p++; /*red */ \
g = *p++; /*green*/ \
b = *p++; /*blue */ \
*q++ = r; \
*q++ = g; \
*q++ = b;
#define FOREND \
q++; \
} while (p != endp);
#define ALPHA *q
switch (trans) {
case PNG_CALLBACKT:
FORSTART
ALPHA = AlphaCallback((unsigned char) r, (unsigned char) g, (unsigned char) b);
FOREND
break;
case PNG_STENCIL:
FORSTART
if (r == StencilRed && g == StencilGreen && b == StencilBlue)
ALPHA = 0;
else
ALPHA = 255;
FOREND
break;
case PNG_BLEND1:
FORSTART
a = r+g+b;
if (a > 255) ALPHA = 255; else ALPHA = a;
FOREND
break;
case PNG_BLEND2:
FORSTART
a = r+g+b;
if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
FOREND
break;
case PNG_BLEND3:
FORSTART
ALPHA = (r+g+b)/3;
FOREND
break;
case PNG_BLEND4:
FORSTART
a = r*r+g*g+b*b;
if (a > 255) ALPHA = 255; else ALPHA = a;
FOREND
break;
case PNG_BLEND5:
FORSTART
a = r*r+g*g+b*b;
if (a > 255*2) ALPHA = 255; else ALPHA = a/2;
FOREND
break;
case PNG_BLEND6:
FORSTART
a = r*r+g*g+b*b;
if (a > 255*3) ALPHA = 255; else ALPHA = a/3;
FOREND
break;
case PNG_BLEND7:
FORSTART
a = r*r+g*g+b*b;
if (a > 255*255) ALPHA = 255; else ALPHA = (int) sqrt(a);
FOREND
break;
}
#undef FORSTART
#undef FOREND
#undef ALPHA
if (mipmap == PNG_BUILDMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 1);
else if (mipmap == PNG_SIMPLEMIPMAPS)
Build2DMipmaps(4, width, height, GL_RGBA, data2, 0);
else
glTexImage2D(GL_TEXTURE_2D, mipmap, 4, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, data2);
free(data2);
}
glPixelStorei(GL_PACK_ALIGNMENT, pack);
glPixelStorei(GL_UNPACK_ALIGNMENT, unpack);
} /* OpenGL end */
png_read_end(png, endinfo);
png_destroy_read_struct(&png, &info, &endinfo);
free(data);
return 1;
}