MBCBoardViewTextures.mm [plain text]
/*
File: MBCBoardViewTextures.mm
Contains: Load OpenGL textures from resources
Version: 1.0
Copyright: © 2002-2012 by Apple Computer, Inc., all rights reserved.
*/
#import "MBCBoardView.h"
#import "MBCBoardViewDraw.h"
#import <stdlib.h>
#import <string.h>
#import <OpenGL/glu.h>
#import <OpenGL/glext.h>
#import <GLUT/glut.h>
NSURL * texture_url(NSString * name, NSString * dir)
{
NSString * path = [[NSBundle mainBundle] pathForResource:[name stringByAppendingString:@"@2x"]
ofType:@"png"
inDirectory:dir];
if (![[NSFileManager defaultManager] fileExistsAtPath:path])
path = [[NSBundle mainBundle] pathForResource:name
ofType:@"png"
inDirectory:dir];
return [NSURL fileURLWithPath:path];
}
GLuint load_texture(NSString * name, NSString * dir, BOOL mono, float anisotropy, bool blendX)
{
NSURL * url = texture_url(name, dir);
CGImageSourceRef imgSrc = CGImageSourceCreateWithURL((CFURLRef)url, NULL);
CGImageRef img = CGImageSourceCreateImageAtIndex(imgSrc, 0, NULL);
GLuint texture_name;
size_t width = CGImageGetWidth(img);
size_t dWidth = mono ? width : width*4;
size_t height = CGImageGetHeight(img);
CGRect rect = {{0, 0}, {width, height}};
void * data = calloc(dWidth, height);
CGColorSpaceRef space = mono ? NULL : CGColorSpaceCreateDeviceRGB();
CGContextRef bitmap =
CGBitmapContextCreate(data, width, height, 8, dWidth, space,
mono ? kCGImageAlphaOnly
: kCGBitmapByteOrder32Host | kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(bitmap, rect, img);
CGContextRelease(bitmap);
CGImageRelease(img);
CFRelease(imgSrc);
if (!mono)
CGColorSpaceRelease(space);
if (blendX) {
size_t blendMax = width / 2;
for (size_t y=0; y<height; ++y) {
uint8_t * row = reinterpret_cast<uint8_t *>(data)+y*dWidth;
for (size_t x=0; x<blendMax; ++x) {
float kThisWeight = 0.5f+x*0.5f/blendMax;
float kOtherWeight = 1.0f-kThisWeight;
for (size_t comp=0; comp<4; ++comp) {
uint8_t left = row[(x<<2)+comp]*kThisWeight+row[((width-x-1)<<2)+comp]*kOtherWeight;
uint8_t right = row[((width-x-1)<<2)+comp]*kThisWeight+row[(x<<2)+comp]*kOtherWeight;
row[(x<<2)+comp] = left;
row[((width-x-1)<<2)+comp] = right;
}
}
}
}
glPixelStorei(GL_UNPACK_ROW_LENGTH, width);
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);
if (anisotropy)
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_ANISOTROPY_EXT, anisotropy);
if (mono)
gluBuild2DMipmaps(GL_TEXTURE_2D, GL_ALPHA, width, height, GL_ALPHA, GL_UNSIGNED_BYTE, data);
else
gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA8, width, height, GL_BGRA_EXT, GL_UNSIGNED_INT_8_8_8_8_REV, 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, fAnisotropy, [part isEqual:@"Piece"])];
[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, fAnisotropy, true)];
fSelectedPieceDrawStyle->fAlpha = 0.8f;
for (char i = '1'; i <= '8'; ++i)
fNumberTextures[i - '1'] =
load_texture([NSString stringWithFormat:@"%c", i], nil, TRUE, fAnisotropy, false);
for (char i = 'a'; i <= 'h'; i++)
fLetterTextures[i - 'a'] =
load_texture([NSString stringWithFormat:@"%c", i], nil, TRUE, fAnisotropy, false);
}
- (void) loadColors
{
[self loadStaticTextures];
}
@end
// Local Variables:
// mode:ObjC
// End: