MBCBoardViewTextures.mm [plain text]
/*
File: MBCBoardViewTextures.mm
Contains: Load OpenGL textures from resources
Copyright: © 2002-2005 Apple Computer, Inc. All rights reserved.
Derived from glChess, Copyright © 2002 Robert Ancell and Michael Duelli
Permission granted to Apple to relicense under the following terms:
IMPORTANT: This Apple software is supplied to you by Apple Computer,
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms,
and subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the
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of Apple Computer, Inc. may be used to endorse or promote products
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MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND
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*/
#import "MBCBoardView.h"
#import "MBCBoardViewDraw.h"
#import <stdio.h>
#import <stdlib.h>
#import <string.h>
#import <OpenGL/glu.h>
#import <OpenGL/glext.h>
#import <GLUT/glut.h>
void
bwtorgba(unsigned char *b,unsigned char *l,int n) {
while(n--) {
l[0] = *b;
l[1] = *b;
l[2] = *b;
l[3] = 0xff;
l += 4; b++;
}
}
void
rgbtorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *l,int n) {
while(n--) {
l[0] = r[0];
l[1] = g[0];
l[2] = b[0];
l[3] = 0xff;
l += 4; r++; g++; b++;
}
}
void
rgbatorgba(unsigned char *r,unsigned char *g,unsigned char *b,unsigned char *a,unsigned char *l,int n) {
while(n--) {
l[0] = r[0];
l[1] = g[0];
l[2] = b[0];
l[3] = a[0];
l += 4; r++; g++; b++; a++;
}
}
typedef struct _ImageRec {
unsigned short imagic;
unsigned short type;
unsigned short dim;
unsigned short xsize, ysize, zsize;
unsigned int min, max;
unsigned int wasteBytes;
char name[80];
unsigned long colorMap;
FILE *file;
unsigned char *tmp, *tmpR, *tmpG, *tmpB;
unsigned long rleEnd;
unsigned int *rowStart;
int *rowSize;
} ImageRec;
static void
ConvertShort(unsigned short *array, unsigned int length) {
unsigned short b1, b2;
unsigned char *ptr;
ptr = (unsigned char *)array;
while (length--) {
b1 = *ptr++;
b2 = *ptr++;
*array++ = (b1 << 8) | (b2);
}
}
static void
ConvertUint(unsigned *array, unsigned int length) {
unsigned int b1, b2, b3, b4;
unsigned char *ptr;
ptr = (unsigned char *)array;
while (length--) {
b1 = *ptr++;
b2 = *ptr++;
b3 = *ptr++;
b4 = *ptr++;
*array++ = (b1 << 24) | (b2 << 16) | (b3 << 8) | (b4);
}
}
static ImageRec *ImageOpen(const char *fileName)
{
union {
int testWord;
char testByte[4];
} endianTest;
ImageRec *image;
int swapFlag;
int x;
endianTest.testWord = 1;
if (endianTest.testByte[0] == 1) {
swapFlag = 1;
} else {
swapFlag = 0;
}
image = (ImageRec *)malloc(sizeof(ImageRec));
if (image == NULL) {
fprintf(stderr, "Out of memory!\n");
exit(1);
}
if ((image->file = fopen(fileName, "rb")) == NULL) {
perror(fileName);
exit(1);
}
fread(image, 1, 12, image->file);
if (swapFlag) {
ConvertShort(&image->imagic, 6);
}
image->tmp = (unsigned char *)malloc(image->xsize*256);
image->tmpR = (unsigned char *)malloc(image->xsize*256);
image->tmpG = (unsigned char *)malloc(image->xsize*256);
image->tmpB = (unsigned char *)malloc(image->xsize*256);
if (image->tmp == NULL || image->tmpR == NULL || image->tmpG == NULL ||
image->tmpB == NULL) {
fprintf(stderr, "Out of memory!\n");
exit(1);
}
if ((image->type & 0xFF00) == 0x0100) {
x = image->ysize * image->zsize * (int) sizeof(unsigned);
image->rowStart = (unsigned *)malloc(x);
image->rowSize = (int *)malloc(x);
if (image->rowStart == NULL || image->rowSize == NULL) {
fprintf(stderr, "Out of memory!\n");
exit(1);
}
image->rleEnd = 512 + (2 * x);
fseek(image->file, 512, SEEK_SET);
fread(image->rowStart, 1, x, image->file);
fread(image->rowSize, 1, x, image->file);
if (swapFlag) {
ConvertUint(image->rowStart, x/(int) sizeof(unsigned));
ConvertUint((unsigned *)image->rowSize, x/(int) sizeof(int));
}
} else {
image->rowStart = NULL;
image->rowSize = NULL;
}
return image;
}
static void
ImageClose(ImageRec *image) {
fclose(image->file);
free(image->tmp);
free(image->tmpR);
free(image->tmpG);
free(image->tmpB);
if (image->rowStart) {
// free(image->rowStart);
// free(image->rowSize);
}
free(image);
}
static void
ImageGetRow(ImageRec *image, unsigned char *buf, int y, int z) {
unsigned char *iPtr, *oPtr, pixel;
int count;
if ((image->type & 0xFF00) == 0x0100) {
fseek(image->file, (long) image->rowStart[y+z*image->ysize], SEEK_SET);
fread(image->tmp, 1, (unsigned int)image->rowSize[y+z*image->ysize],
image->file);
iPtr = image->tmp;
oPtr = buf;
for (;;) {
pixel = *iPtr++;
count = (int)(pixel & 0x7F);
if (!count) {
if (oPtr-buf != image->xsize)
printf("Oops! %d != %d\n", oPtr-buf, image->xsize);
return;
}
if (pixel & 0x80) {
while (count--) {
*oPtr++ = *iPtr++;
}
} else {
pixel = *iPtr++;
while (count--) {
*oPtr++ = pixel;
}
}
}
} else {
fseek(image->file, 512+(y*image->xsize)+(z*image->xsize*image->ysize),
SEEK_SET);
fread(buf, 1, image->xsize, image->file);
}
}
unsigned *
read_texture(const char *name, int *width, int *height, int *components) {
unsigned *base, *lptr;
unsigned char *rbuf, *gbuf, *bbuf, *abuf;
ImageRec *image;
int y;
image = ImageOpen(name);
if(!image)
return NULL;
(*width)=image->xsize;
(*height)=image->ysize;
(*components)=image->zsize;
base = (unsigned *)malloc(image->xsize*image->ysize*sizeof(unsigned));
rbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
gbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
bbuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
abuf = (unsigned char *)malloc(image->xsize*sizeof(unsigned char));
if(!base || !rbuf || !gbuf || !bbuf)
return NULL;
lptr = base;
for(y=0; y<image->ysize; y++) {
if(image->zsize>=4) {
ImageGetRow(image,rbuf,y,0);
ImageGetRow(image,gbuf,y,1);
ImageGetRow(image,bbuf,y,2);
ImageGetRow(image,abuf,y,3);
rgbatorgba(rbuf,gbuf,bbuf,abuf,(unsigned char *)lptr,image->xsize);
lptr += image->xsize;
} else if(image->zsize==3) {
ImageGetRow(image,rbuf,y,0);
ImageGetRow(image,gbuf,y,1);
ImageGetRow(image,bbuf,y,2);
rgbtorgba(rbuf,gbuf,bbuf,(unsigned char *)lptr,image->xsize);
lptr += image->xsize;
} else {
ImageGetRow(image,rbuf,y,0);
bwtorgba(rbuf,(unsigned char *)lptr,image->xsize);
lptr += image->xsize;
}
}
ImageClose(image);
free(rbuf);
free(gbuf);
free(bbuf);
free(abuf);
return (unsigned *) base;
}
GLuint load_texture(NSString * name, NSString * dir, BOOL mono)
{
GLuint texture_name;
GLubyte * data;
int w, h, c;
name = [[NSBundle mainBundle] pathForResource:name
ofType:@"rgb"
inDirectory:dir];
data = (GLubyte *)read_texture([name cString], &w, &h, &c);
if (mono)
for (c = 0; c<w*h; ++c) {
float v = data[4*c]/255.0f;
data[4*c+0] = 255;
data[4*c+1] = 255;
data[4*c+2] = 255;
data[4*c+3] = static_cast<GLubyte>(pow(v,0.8)*255.0f);
}
/* Generate the texture */
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glGenTextures(1, &texture_name);
glBindTexture(GL_TEXTURE_2D, texture_name);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, 4);
gluBuild2DMipmaps(GL_TEXTURE_2D, 4, w, h, GL_RGBA, GL_UNSIGNED_BYTE, data);
free(data);
return texture_name;
}
@implementation MBCBoardView ( Textures )
#ifdef CHESS_TUNER
- (void) mergeField:(float)val
into:(NSMutableDictionary *)dict
color:(NSString *)color
entry:(NSString *)entry
{
[dict setObject:[NSNumber numberWithFloat:val]
forKey:[color stringByAppendingString:entry]];
}
- (void) mergeStyleAttr:(MBCDrawStyle *)style
color:(NSString *)color
into:(NSMutableDictionary *)dict
{
[self mergeField:style->fDiffuse
into:dict color:color entry:@"Diffuse"];
[self mergeField:style->fSpecular
into:dict color:color entry:@"Specular"];
[self mergeField:style->fShininess
into:dict color:color entry:@"Shininess"];
[self mergeField:style->fAlpha
into:dict color:color entry:@"Alpha"];
}
- (NSMutableDictionary *) mergeStyleAttr:(MBCDrawStyle **)style
into:(NSDictionary *)dict
{
NSMutableDictionary * d = [dict mutableCopy];
[self mergeStyleAttr:style[0] color:@"White" into:d];
[self mergeStyleAttr:style[1] color:@"Black" into:d];
return d;
}
- (void) savePieceStyles
{
NSMutableDictionary * d =
[self mergeStyleAttr:fPieceDrawStyle into:fPieceAttr];
[d writeToFile:[[NSBundle mainBundle] pathForResource:@"Piece"
ofType:@"plist"
inDirectory:fPieceStyle]
atomically:YES];
}
- (void) saveBoardStyles
{
NSMutableDictionary * d =
[self mergeStyleAttr:fBoardDrawStyle into:fBoardAttr];
[self mergeStyleAttr:fBorderDrawStyle color:@"Border" into:d];
[d setObject:[NSNumber numberWithFloat:fBoardReflectivity]
forKey:@"Reflectivity"];
[d setObject:[NSNumber numberWithFloat:fLabelIntensity]
forKey:@"LabelIntensity"];
[d writeToFile:[[NSBundle mainBundle] pathForResource:@"Board"
ofType:@"plist"
inDirectory:fBoardStyle]
atomically:YES];
}
#endif
- (void) loadField:(float *)field fromAttr:(NSDictionary *)attr
color:(NSString *)color entry:(NSString *)entry
{
NSNumber * val = [attr objectForKey:[color stringByAppendingString:entry]];
if (val)
*field = [val floatValue];
}
- (void) loadDrawStyle:(MBCDrawStyle *)drawStyle
forColor:(NSString *)color
part:(NSString *)part
style:(NSString *)style
attr:(NSDictionary *)attr
{
[drawStyle unloadTexture];
[drawStyle initWithTexture:
load_texture([color stringByAppendingString:part],
style, FALSE)];
[self loadField:&drawStyle->fDiffuse
fromAttr:attr color:color entry:@"Diffuse"];
[self loadField:&drawStyle->fSpecular
fromAttr:attr color:color entry:@"Specular"];
[self loadField:&drawStyle->fShininess
fromAttr:attr color:color entry:@"Shininess"];
[self loadField:&drawStyle->fAlpha
fromAttr:attr color:color entry:@"Alpha"];
}
/* Load the textures for a color */
- (void) loadColorDrawStyles:(NSString *)cname forColor:(int)color
{
[self loadDrawStyle:fPieceDrawStyle[color] forColor:cname
part:@"Piece" style:fPieceStyle attr:fPieceAttr];
[self loadDrawStyle:fBoardDrawStyle[color] forColor:cname
part:@"Board" style:fBoardStyle attr:fBoardAttr];
}
- (void) loadTextureAttr
{
NSString * p;
p = [[NSBundle mainBundle] pathForResource:@"Board"
ofType:@"plist"
inDirectory:fBoardStyle];
[fBoardAttr release];
fBoardAttr = [[NSDictionary dictionaryWithContentsOfFile:p] retain];
p = [[NSBundle mainBundle] pathForResource:@"Piece"
ofType:@"plist"
inDirectory:fPieceStyle];
[fPieceAttr release];
fPieceAttr = [[NSDictionary dictionaryWithContentsOfFile:p] retain];
}
- (void) loadStyles
{
[self loadTextureAttr];
[self loadColorDrawStyles:@"White" forColor:0];
[self loadColorDrawStyles:@"Black" forColor:1];
[self loadDrawStyle:fBorderDrawStyle forColor:@"Border" part:@""
style:fBoardStyle attr:fBoardAttr];
[self loadField:&fBoardReflectivity fromAttr:fBoardAttr
color:@"" entry:@"Reflectivity"];
[self loadField:&fLabelIntensity fromAttr:fBoardAttr
color:@"" entry:@"LabelIntensity"];
}
- (void) loadStaticTextures
{
[fSelectedPieceDrawStyle initWithTexture:
load_texture(@"selected_piece_texture", nil, FALSE)];
fSelectedPieceDrawStyle->fAlpha = 0.8f;
for (char i = '1'; i <= '8'; ++i)
fNumberTextures[i - '1'] =
load_texture([NSString stringWithFormat:@"%c", i], nil, TRUE);
for (char i = 'a'; i <= 'h'; i++)
fLetterTextures[i - 'a'] =
load_texture([NSString stringWithFormat:@"%c", i], nil, TRUE);
}
- (void) loadColors
{
[self loadStaticTextures];
}
@end
// Local Variables:
// mode:ObjC
// End: