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darling-cocotron/Onyx2D/O2Image.m
TheBrokenRail b6548a202d Fix Continuation Indent
2020-05-12 17:04:16 -04:00

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/*------------------------------------------------------------------------
*
* Derivative of the OpenVG 1.0.1 Reference Implementation
* -------------------------------------
*
* Copyright (c) 2007 The Khronos Group Inc.
* Copyright (c) 2008 Christopher J. W. Lloyd
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and /or associated documentation files
* (the "Materials "), to deal in the Materials without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Materials,
* and to permit persons to whom the Materials are furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Materials.
*
* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR
* THE USE OR OTHER DEALINGS IN THE MATERIALS.
*
*-------------------------------------------------------------------*/
#import <Foundation/NSData.h>
#import <Onyx2D/O2ColorSpace.h>
#import <Onyx2D/O2DataProvider.h>
#import <Onyx2D/O2Exceptions.h>
#import <Onyx2D/O2Image.h>
#import <Onyx2D/O2Surface.h>
@implementation O2Image
ONYX2D_STATIC BOOL initFunctionsForMonochrome(O2Image *self,
size_t bitsPerComponent,
size_t bitsPerPixel,
O2BitmapInfo bitmapInfo)
{
switch (bitsPerComponent) {
case 8:
switch (bitsPerPixel) {
case 8:
self->_read_a8u = O2ImageRead_G8_to_A8;
self->_read_argb8u = O2ImageRead_G8_to_argb8u;
return YES;
}
break;
}
return NO;
}
ONYX2D_STATIC BOOL initFunctionsForRGBColorSpace(O2Image *self,
size_t bitsPerComponent,
size_t bitsPerPixel,
O2BitmapInfo bitmapInfo)
{
switch (bitsPerComponent) {
case 32:
switch (bitsPerPixel) {
case 32:
break;
case 128:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb32f = O2ImageRead_argb32fLittle_to_argb32f;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb32f = O2ImageRead_argb32fBig_to_argb32f;
return YES;
}
}
break;
case 8:
switch (bitsPerPixel) {
case 8:
self->_read_a8u = O2ImageRead_G8_to_A8;
self->_read_argb8u = O2ImageRead_G8_to_argb8u;
return YES;
case 16:
self->_read_argb8u = O2ImageRead_GA88_to_argb8u;
return YES;
case 24:
switch (bitmapInfo & kO2BitmapAlphaInfoMask) {
case kO2ImageAlphaNone:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_ABGR8888_to_argb8u;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_RGBA8888_to_argb8u;
return YES;
}
return YES;
}
break;
case 32:
switch (bitmapInfo & kO2BitmapAlphaInfoMask) {
case kO2ImageAlphaNone:
break;
case kO2ImageAlphaLast:
case kO2ImageAlphaPremultipliedLast:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_ABGR8888_to_argb8u;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_RGBA8888_to_argb8u;
return YES;
}
break;
case kO2ImageAlphaPremultipliedFirst:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_BGRA8888_to_argb8u;
return YES;
}
break;
case kO2ImageAlphaFirst:
break;
case kO2ImageAlphaNoneSkipLast:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_ABGR8888_to_argb8u;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_RGBA8888_to_argb8u;
return YES;
}
break;
case kO2ImageAlphaNoneSkipFirst:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_BGRX8888_to_argb8u;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_XRGB8888_to_argb8u;
return YES;
}
break;
}
break;
}
break;
case 5:
switch (bitsPerPixel) {
case 16:
if (bitmapInfo ==
(kO2BitmapByteOrder16Little | kO2ImageAlphaNoneSkipFirst)) {
self->_read_argb8u = O2ImageRead_G3B5X1R5G2_to_argb8u;
return YES;
}
break;
}
break;
case 4:
switch (bitsPerPixel) {
case 4:
break;
case 12:
break;
case 16:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Little:
case kO2BitmapByteOrder32Little:
self->_read_argb8u = O2ImageRead_BARG4444_to_argb8u;
return YES;
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_RGBA4444_to_argb8u;
return YES;
}
return YES;
}
break;
case 2:
switch (bitsPerPixel) {
case 2:
break;
case 6:
break;
case 8:
self->_read_argb8u = O2ImageRead_RGBA2222_to_argb8u;
return YES;
}
break;
case 1:
switch (bitsPerPixel) {
case 1:
// self->_read_argb32f=O2ImageReadPixelSpan_01;
// return YES;
case 3:
break;
}
break;
}
return NO;
}
ONYX2D_STATIC BOOL initFunctionsForCMYKColorSpace(O2Image *self,
size_t bitsPerComponent,
size_t bitsPerPixel,
O2BitmapInfo bitmapInfo)
{
switch (bitsPerComponent) {
case 8:
switch (bitsPerPixel) {
case 32:
switch (bitmapInfo & kO2BitmapByteOrderMask) {
case kO2BitmapByteOrder16Big:
case kO2BitmapByteOrder32Big:
self->_read_argb8u = O2ImageRead_CMYK8888_to_argb8u;
return YES;
}
break;
}
break;
}
return NO;
}
ONYX2D_STATIC BOOL initFunctionsForIndexedColorSpace(O2Image *self,
size_t bitsPerComponent,
size_t bitsPerPixel,
O2ColorSpaceRef colorSpace,
O2BitmapInfo bitmapInfo)
{
switch ([[(O2ColorSpace_indexed *) colorSpace baseColorSpace] type]) {
case kO2ColorSpaceModelRGB:
self->_read_argb8u = O2ImageRead_I8_to_argb8u;
return YES;
default:
return NO;
}
}
ONYX2D_STATIC BOOL initFunctionsForParameters(O2Image *self,
size_t bitsPerComponent,
size_t bitsPerPixel,
O2ColorSpaceRef colorSpace,
O2BitmapInfo bitmapInfo)
{
self->_read_a8u = O2Image_read_a8u_src_argb8u;
self->_read_a32f = O2ImageRead_ANY_to_A8_to_Af;
self->_read_argb32f = O2ImageRead_ANY_to_argb8u_to_argb32f;
if ((bitmapInfo & kO2BitmapByteOrderMask) == kO2BitmapByteOrderDefault) {
#ifdef __LITTLE_ENDIAN__
bitmapInfo |= kO2BitmapByteOrder32Little;
#else
bitmapInfo |= kO2BitmapByteOrder32Big;
#endif
}
switch ([colorSpace type]) {
case kO2ColorSpaceModelMonochrome:
return initFunctionsForMonochrome(self, bitsPerComponent, bitsPerPixel,
bitmapInfo);
case kO2ColorSpaceModelRGB:
return initFunctionsForRGBColorSpace(self, bitsPerComponent,
bitsPerPixel, bitmapInfo);
case kO2ColorSpaceModelCMYK:
return initFunctionsForCMYKColorSpace(self, bitsPerComponent,
bitsPerPixel, bitmapInfo);
case kO2ColorSpaceModelIndexed:
return initFunctionsForIndexedColorSpace(
self, bitsPerComponent, bitsPerPixel, colorSpace, bitmapInfo);
default:
return NO;
}
}
- initWithWidth: (size_t) width
height: (size_t) height
bitsPerComponent: (size_t) bitsPerComponent
bitsPerPixel: (size_t) bitsPerPixel
bytesPerRow: (size_t) bytesPerRow
colorSpace: (O2ColorSpaceRef) colorSpace
bitmapInfo: (O2BitmapInfo) bitmapInfo
decoder: (O2ImageDecoder *) decoder
provider: (O2DataProvider *) provider
decode: (const O2Float *) decode
interpolate: (BOOL) interpolate
renderingIntent: (O2ColorRenderingIntent) renderingIntent
{
_width = width;
_height = height;
_bitsPerComponent = bitsPerComponent;
_bitsPerPixel = bitsPerPixel;
_bytesPerRow = bytesPerRow;
_colorSpace = [colorSpace retain];
_bitmapInfo = bitmapInfo;
_decoder = [decoder retain];
_provider = [provider retain];
// _decode=NULL;
_interpolate = interpolate;
_isMask = NO;
_renderingIntent = renderingIntent;
_mask = nil;
_directBytes = NULL;
_directLength = 0;
_clampExternalPixels = NO; // only do this if premultiplied format
if (!initFunctionsForParameters(self, bitsPerComponent, bitsPerPixel,
colorSpace, bitmapInfo)) {
NSLog(@"O2Image failed to init with bpc=%zu, "
@"bpp=%zu,colorSpace=%@,bitmapInfo=0x%0X",
bitsPerComponent, bitsPerPixel, colorSpace, bitmapInfo);
[self dealloc];
return nil;
}
return self;
}
- initWithJPEGDataProvider: (O2DataProvider *) jpegProvider
decode: (const O2Float *) decode
interpolate: (BOOL) interpolate
renderingIntent: (O2ColorRenderingIntent) renderingIntent
{
O2UnimplementedMethod();
return nil;
}
- initWithPNGDataProvider: (O2DataProvider *) jpegProvider
decode: (const O2Float *) decode
interpolate: (BOOL) interpolate
renderingIntent: (O2ColorRenderingIntent) renderingIntent
{
O2UnimplementedMethod();
return nil;
}
- initMaskWithWidth: (size_t) width
height: (size_t) height
bitsPerComponent: (size_t) bitsPerComponent
bitsPerPixel: (size_t) bitsPerPixel
bytesPerRow: (size_t) bytesPerRow
provider: (O2DataProvider *) provider
decode: (const O2Float *) decode
interpolate: (BOOL) interpolate
{
O2ColorSpaceRef gray = O2ColorSpaceCreateDeviceGray();
if ((self = [self initWithWidth: width
height: height
bitsPerComponent: bitsPerComponent
bitsPerPixel: bitsPerPixel
bytesPerRow: bytesPerRow
colorSpace: gray
bitmapInfo: kO2ImageAlphaNone
decoder: NULL
provider: provider
decode: decode
interpolate: interpolate
renderingIntent: kO2RenderingIntentDefault]) == nil) {
O2ColorSpaceRelease(gray);
return nil;
}
O2ColorSpaceRelease(gray);
_isMask = YES;
return self;
}
- (void) dealloc {
[_colorSpace release];
[_decoder release];
[_provider release];
if (_decode != NULL)
NSZoneFree(NULL, _decode);
[_mask release];
[_directData release];
[super dealloc];
}
- copyWithZone: (NSZone *) zone {
return [self retain];
}
- (O2Image *) copyWithColorSpace: (O2ColorSpaceRef) colorSpace {
O2UnimplementedMethod();
return nil;
}
- (void) setMask: (O2Image *) image {
[image retain];
[_mask release];
_mask = image;
}
- copyWithMask: (O2Image *) image {
O2UnimplementedMethod();
return nil;
}
- copyWithMaskingColors: (const O2Float *) components {
O2UnimplementedMethod();
return nil;
}
ONYX2D_STATIC_INLINE const void *directBytes(O2Image *self) {
if (self->_directBytes == NULL) {
if ([self->_provider isDirectAccess]) {
self->_directData = [[self->_provider data] retain];
self->_directBytes = [self->_provider bytes];
self->_directLength = [self->_provider length];
} else {
self->_directData =
(NSData *) O2DataProviderCopyData(self->_provider);
self->_directBytes = [self->_directData bytes];
self->_directLength = [self->_directData length];
}
}
return self->_directBytes;
}
ONYX2D_STATIC_INLINE const void *scanlineAtY(O2Image *self, int y) {
const void *bytes = directBytes(self);
int offset = self->_bytesPerRow * y;
int max = offset + self->_bytesPerRow;
if (max <= self->_directLength)
return bytes + offset;
return NULL;
}
- (NSData *) directData {
directBytes(self);
return _directData;
}
- (const void *) directBytes {
return directBytes(self);
}
- (void) releaseDirectDataIfPossible {
if (![_provider isDirectAccess]) {
[_directData release];
_directData = nil;
_directBytes = NULL;
_directLength = 0;
}
}
O2ImageRef O2ImageCreate(size_t width, size_t height, size_t bitsPerComponent,
size_t bitsPerPixel, size_t bytesPerRow,
O2ColorSpaceRef colorSpace, O2BitmapInfo bitmapInfo,
O2DataProviderRef dataProvider, const O2Float *decode,
BOOL shouldInterpolate,
O2ColorRenderingIntent renderingIntent)
{
return [[O2Image alloc] initWithWidth: width
height: height
bitsPerComponent: bitsPerComponent
bitsPerPixel: bitsPerPixel
bytesPerRow: bytesPerRow
colorSpace: colorSpace
bitmapInfo: bitmapInfo
decoder: NULL
provider: dataProvider
decode: decode
interpolate: shouldInterpolate
renderingIntent: renderingIntent];
}
O2ImageRef O2ImageMaskCreate(size_t width, size_t height,
size_t bitsPerComponent, size_t bitsPerPixel,
size_t bytesPerRow, O2DataProviderRef dataProvider,
const O2Float *decode, BOOL shouldInterpolate)
{
return [[O2Image alloc] initMaskWithWidth: width
height: height
bitsPerComponent: bitsPerComponent
bitsPerPixel: bitsPerPixel
bytesPerRow: bytesPerRow
provider: dataProvider
decode: decode
interpolate: shouldInterpolate];
}
O2ImageRef O2ImageCreateCopy(O2ImageRef self) {
return [self copy];
}
O2ImageRef O2ImageCreateCopyWithColorSpace(O2ImageRef self,
O2ColorSpaceRef colorSpace)
{
return [self copyWithColorSpace: colorSpace];
}
O2ImageRef
O2ImageCreateWithJPEGDataProvider(O2DataProviderRef jpegProvider,
const O2Float *decode, BOOL interpolate,
O2ColorRenderingIntent renderingIntent)
{
return [[O2Image alloc] initWithJPEGDataProvider: jpegProvider
decode: decode
interpolate: interpolate
renderingIntent: renderingIntent];
}
O2ImageRef
O2ImageCreateWithPNGDataProvider(O2DataProviderRef pngProvider,
const O2Float *decode, BOOL interpolate,
O2ColorRenderingIntent renderingIntent)
{
return [[O2Image alloc] initWithPNGDataProvider: pngProvider
decode: decode
interpolate: interpolate
renderingIntent: renderingIntent];
}
O2ImageRef O2ImageCreateWithImageInRect(O2ImageRef self, O2Rect rect) {
rect = O2RectIntegral(rect);
size_t x = MAX(0, rect.origin.x);
size_t y = MAX(0, rect.origin.y);
size_t col, width = rect.size.width;
size_t row, height = rect.size.height;
size_t childBytesPerRow = (width * self->_bitsPerPixel + 7) / 8;
uint8_t *childPixelBytes = malloc(height * childBytesPerRow);
size_t childIndex = 0;
const uint8_t *pixelBytes = directBytes(self);
pixelBytes += self->_bytesPerRow * y;
for (row = 0; row < height; row++) {
const uint8_t *rowBytes = pixelBytes + (x * self->_bitsPerPixel) / 8;
for (col = 0; col < childBytesPerRow; col++) {
// Copy all of the needed bytes for the row
childPixelBytes[childIndex++] = rowBytes[col];
}
pixelBytes += self->_bytesPerRow;
}
NSData *data = [NSData dataWithBytesNoCopy: childPixelBytes
length: childIndex];
O2DataProviderRef provider =
O2DataProviderCreateWithCFData((CFDataRef) data);
O2ImageRef result = O2ImageCreate(
width, height, self->_bitsPerComponent, self->_bitsPerPixel,
childBytesPerRow, self->_colorSpace, self->_bitmapInfo, provider,
self->_decode, self->_interpolate, self->_renderingIntent);
O2DataProviderRelease(provider);
return result;
}
O2ImageRef O2ImageCreateWithMask(O2ImageRef self, O2ImageRef mask) {
return [self copyWithMask: mask];
}
O2ImageRef O2ImageCreateWithMaskingColors(O2ImageRef self,
const O2Float *components)
{
return [self copyWithMaskingColors: components];
}
O2ImageRef O2ImageRetain(O2ImageRef self) {
return (self != NULL) ? (O2ImageRef) CFRetain(self) : NULL;
}
void O2ImageRelease(O2ImageRef self) {
if (self != NULL)
CFRelease(self);
}
BOOL O2ImageIsMask(O2ImageRef self) {
if (self == NULL)
return NO;
return self->_isMask;
}
size_t O2ImageGetWidth(O2Image *self) {
if (self == NULL)
return 0;
return self->_width;
}
size_t O2ImageGetHeight(O2Image *self) {
if (self == NULL)
return 0;
return self->_height;
}
size_t O2ImageGetBitsPerComponent(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_bitsPerComponent;
}
size_t O2ImageGetBitsPerPixel(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_bitsPerPixel;
}
size_t O2ImageGetBytesPerRow(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_bytesPerRow;
}
O2ColorSpaceRef O2ImageGetColorSpace(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_colorSpace;
}
O2ImageAlphaInfo O2ImageGetAlphaInfo(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_bitmapInfo & kO2BitmapAlphaInfoMask;
}
O2DataProviderRef O2ImageGetDataProvider(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_provider;
}
const O2Float *O2ImageGetDecode(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_decode;
}
BOOL O2ImageGetShouldInterpolate(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_interpolate;
}
O2ColorRenderingIntent O2ImageGetRenderingIntent(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_renderingIntent;
}
O2BitmapInfo O2ImageGetBitmapInfo(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_bitmapInfo;
}
O2ImageRef O2ImageGetMask(O2ImageRef self) {
if (self == NULL)
return 0;
return self->_mask;
}
O2ImageDecoderRef O2ImageGetImageDecoder(O2ImageRef self) {
if (self == NULL)
return NULL;
return self->_decoder;
}
O2argb32f *O2ImageRead_ANY_to_argb8u_to_argb32f(O2Image *self, int x, int y,
O2argb32f *span, int length)
{
O2argb8u *span8888 = __builtin_alloca(length * sizeof(O2argb8u));
O2argb8u *direct = self->_read_argb8u(self, x, y, span8888, length);
if (direct != NULL)
span8888 = direct;
int i;
for (i = 0; i < length; i++) {
O2argb32f result;
result.r = O2Float32FromByte(span8888[i].r);
result.g = O2Float32FromByte(span8888[i].g);
result.b = O2Float32FromByte(span8888[i].b);
result.a = O2Float32FromByte(span8888[i].a);
*span++ = result;
}
return NULL;
}
O2Float32 bytesLittleToFloat(const unsigned char *scanline) {
union {
unsigned char bytes[4];
O2Float32 f;
} u;
#ifdef __LITTLE_ENDIAN__
u.bytes[0] = scanline[0];
u.bytes[1] = scanline[1];
u.bytes[2] = scanline[2];
u.bytes[3] = scanline[3];
#else
u.bytes[0] = scanline[3];
u.bytes[1] = scanline[2];
u.bytes[2] = scanline[1];
u.bytes[3] = scanline[0];
#endif
return u.f;
}
O2argb32f *O2ImageRead_argb32fLittle_to_argb32f(O2Image *self, int x, int y,
O2argb32f *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 16;
for (i = 0; i < length; i++) {
O2argb32f result;
result.r = bytesLittleToFloat(scanline);
scanline += 4;
result.g = bytesLittleToFloat(scanline);
scanline += 4;
result.b = bytesLittleToFloat(scanline);
scanline += 4;
result.a = bytesLittleToFloat(scanline);
scanline += 4;
*span++ = result;
}
return NULL;
}
O2Float32 bytesBigToFloat(const unsigned char *scanline) {
union {
unsigned char bytes[4];
O2Float32 f;
} u;
#ifdef __BIG_ENDIAN__
u.bytes[0] = scanline[0];
u.bytes[1] = scanline[1];
u.bytes[2] = scanline[2];
u.bytes[3] = scanline[3];
#else
u.bytes[0] = scanline[3];
u.bytes[1] = scanline[2];
u.bytes[2] = scanline[1];
u.bytes[3] = scanline[0];
#endif
return u.f;
}
O2argb32f *O2ImageRead_argb32fBig_to_argb32f(O2Image *self, int x, int y,
O2argb32f *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 16;
for (i = 0; i < length; i++) {
O2argb32f result;
result.r = bytesBigToFloat(scanline);
scanline += 4;
result.g = bytesBigToFloat(scanline);
scanline += 4;
result.b = bytesBigToFloat(scanline);
scanline += 4;
result.a = bytesBigToFloat(scanline);
scanline += 4;
*span++ = result;
}
return NULL;
}
uint8_t *O2ImageRead_G8_to_A8(O2Image *self, int x, int y, uint8_t *alpha,
int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x;
for (i = 0; i < length; i++) {
*alpha++ = *scanline++;
}
return NULL;
}
uint8_t *O2Image_read_a8u_src_argb8u(O2Image *self, int x, int y,
uint8_t *alpha, int length)
{
O2argb8u *span = __builtin_alloca(length * sizeof(O2argb8u));
int i;
O2argb8u *direct = self->_read_argb8u(self, x, y, span, length);
if (direct != NULL)
span = direct;
for (i = 0; i < length; i++) {
*alpha++ = span[i].a;
}
return NULL;
}
O2Float *O2ImageRead_ANY_to_A8_to_Af(O2Image *self, int x, int y,
O2Float *alpha, int length)
{
uint8_t span[length];
int i;
self->_read_a8u(self, x, y, span, length);
for (i = 0; i < length; i++)
alpha[i] = O2Float32FromByte(span[i]);
return NULL;
}
O2argb8u *O2ImageRead_G8_to_argb8u(O2Image *self, int x, int y, O2argb8u *span,
int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = *scanline++;
result.g = result.r;
result.b = result.r;
result.a = 0xFF;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_GA88_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 2;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = *scanline++;
result.g = result.r;
result.b = result.r;
result.a = *scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_RGBA8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = scanline[0];
result.g = scanline[1];
result.b = scanline[2];
result.a = scanline[3];
*span++ = result;
scanline += 4;
}
return NULL;
}
O2argb8u *O2ImageRead_ABGR8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
for (i = 0; i < length; i++) {
O2argb8u result;
result.a = *scanline++;
result.b = *scanline++;
result.g = *scanline++;
result.r = *scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_BGRA8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
#ifdef __LITTLE_ENDIAN__
return (O2argb8u *) scanline;
#endif
for (i = 0; i < length; i++) {
O2argb8u result;
result.b = *scanline++;
result.g = *scanline++;
result.r = *scanline++;
result.a = *scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_RGB888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 3;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = *scanline++;
result.g = *scanline++;
result.b = *scanline++;
result.a = 255;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_BGRX8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
for (i = 0; i < length; i++) {
O2argb8u result;
result.b = *scanline++;
result.g = *scanline++;
result.r = *scanline++;
result.a = 255;
scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_XRGB8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
for (i = 0; i < length; i++) {
O2argb8u result;
result.a = *scanline++;
result.r = *scanline++;
result.g = *scanline++;
result.b = *scanline++;
*span++ = result;
}
return NULL;
}
// kO2BitmapByteOrder16Little|kO2ImageAlphaNoneSkipFirst
O2argb8u *O2ImageRead_G3B5X1R5G2_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 2;
for (i = 0; i < length; i++) {
unsigned short low = *scanline++;
unsigned short high = *scanline;
unsigned short value = low | (high << 8);
O2argb8u result;
result.r = ((value >> 10) & 0x1F) << 3;
result.g = ((value >> 5) & 0x1F) << 3;
result.b = ((value & 0x1F) << 3);
result.a = 255;
scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_RGBA4444_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 2;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = *scanline & 0xF0;
result.g = (*scanline & 0x0F) << 4;
scanline++;
result.b = *scanline & 0xF0;
result.a = (*scanline & 0x0F) << 4;
scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_BARG4444_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 2;
for (i = 0; i < length; i++) {
O2argb8u result;
result.b = *scanline & 0xF0;
result.a = (*scanline & 0x0F) << 4;
scanline++;
result.r = *scanline & 0xF0;
result.g = (*scanline & 0x0F) << 4;
scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_RGBA2222_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x;
for (i = 0; i < length; i++) {
O2argb8u result;
result.r = *scanline & 0xC0;
result.g = (*scanline & 0x03) << 2;
result.b = (*scanline & 0x0C) << 4;
result.a = (*scanline & 0x03) << 6;
scanline++;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_CMYK8888_to_argb8u(O2Image *self, int x, int y,
O2argb8u *span, int length)
{
// poor results
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x * 4;
for (i = 0; i < length; i++) {
O2argb8u result;
unsigned char c = *scanline++;
unsigned char y = *scanline++;
unsigned char m = *scanline++;
unsigned char k = *scanline++;
unsigned char w = 0xff - k;
result.r = c > w ? 0 : w - c;
result.g = m > w ? 0 : w - m;
result.b = y > w ? 0 : w - y;
result.a = 1;
*span++ = result;
}
return NULL;
}
O2argb8u *O2ImageRead_I8_to_argb8u(O2Image *self, int x, int y, O2argb8u *span,
int length)
{
O2ColorSpace_indexed *indexed = (O2ColorSpace_indexed *) self->_colorSpace;
size_t hival = [indexed hival];
const unsigned char *palette = [indexed paletteBytes];
const uint8_t *scanline = scanlineAtY(self, y);
int i;
if (scanline == NULL)
return NULL;
scanline += x;
for (i = 0; i < length; i++) {
unsigned index = *scanline++;
O2argb8u argb;
RI_INT_CLAMP(index, 0, hival); // it is external data after all
argb.r = palette[index * 3 + 0];
argb.g = palette[index * 3 + 1];
argb.b = palette[index * 3 + 2];
argb.a = 255;
*span++ = argb;
}
return NULL;
}
/*-------------------------------------------------------------------*/ /*!
* \brief
*Reads
*a
*texel
*(u,v)
*at the
*given
*mipmap
*level.
*Tiling
*modes
*and
* color
*space
*conversion
*are
*applied.
*Outputs
*color
*in
*premultiplied
* format.
* \param
* \return
* \note
*/
/*-------------------------------------------------------------------*/
/* O2ImageReadTileSpanExtendEdge__ is used by the image resampling functions to
read translated spans. When a coordinate is outside the image it uses the
edge value. This works better than say, zero, with averaging algorithms
(bilinear,bicubic, etc) as you get good values at the edges.
Ideally the averaging algorithms would only use the available pixels on the
edges */
ONYX2D_STATIC_INLINE void
O2ImageReadTileSpanExtendEdge_largb8u_PRE(O2Image *self, int u, int v,
O2argb8u *span, int length)
{
int i;
O2argb8u *direct;
v = RI_INT_CLAMP(v, 0, self->_height - 1);
for (i = 0; u < 0 && i < length; u++, i++) {
direct = self->_read_argb8u(self, 0, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
int chunk = RI_MIN(length - i, self->_width - u);
direct = self->_read_argb8u(self, u, v, span + i, chunk);
if (direct != NULL) {
int k;
for (k = 0; k < chunk; k++)
span[i + k] = direct[k];
}
i += chunk;
u += chunk;
for (; i < length; i++) {
direct = self->_read_argb8u(self, self->_width - 1, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
}
void O2ImageReadTileSpanExtendEdge__largb32f_PRE(O2Image *self, int u, int v,
O2argb32f *span, int length)
{
int i;
O2argb32f *direct;
v = RI_INT_CLAMP(v, 0, self->_height - 1);
for (i = 0; i < length && u < 0; u++, i++) {
direct = O2Image_read_argb32f(self, 0, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
int chunk = RI_MIN(length - i, self->_width - u);
direct = O2Image_read_argb32f(self, u, v, span + i, chunk);
if (direct != NULL) {
int k;
for (k = 0; k < chunk; k++)
span[i + k] = direct[k];
}
i += chunk;
u += chunk;
for (; i < length; i++) {
direct = O2Image_read_argb32f(self, self->_width - 1, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
}
ONYX2D_STATIC_INLINE int cubic_8(int v0, int v1, int v2, int v3, int fraction) {
int p = (v3 - v2) - (v0 - v1);
int q = (v0 - v1) - p;
return RI_INT_CLAMP((p * (fraction * fraction * fraction)) /
(256 * 256 * 256) +
(q * fraction * fraction) / (256 * 256) +
((v2 - v0) * fraction) / 256 + v1,
0, 255);
}
ONYX2D_STATIC_INLINE O2argb8u bicubic_largb8u_PRE(O2argb8u a, O2argb8u b,
O2argb8u c, O2argb8u d,
int fraction)
{
O2argb8u result;
result.r = cubic_8(a.r, b.r, c.r, d.r, fraction);
result.b = cubic_8(a.g, b.g, c.g, d.g, fraction);
result.g = cubic_8(a.b, b.b, c.b, d.b, fraction);
result.a = cubic_8(a.a, b.a, c.a, d.a, fraction);
return result;
}
void O2ImageBicubic_largb8u_PRE(O2Image *self, int x, int y, O2argb8u *span,
int length, O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
uv.x -= 0.5f;
uv.y -= 0.5f;
int u = RI_FLOOR_TO_INT(uv.x);
int ufrac = coverageFromZeroToOne(uv.x - u);
int v = RI_FLOOR_TO_INT(uv.y);
int vfrac = coverageFromZeroToOne(uv.y - v);
O2argb8u t0, t1, t2, t3;
O2argb8u cspan[4];
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u - 1, v - 1, cspan, 4);
t0 = bicubic_largb8u_PRE(cspan[0], cspan[1], cspan[2], cspan[3], ufrac);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u - 1, v, cspan, 4);
t1 = bicubic_largb8u_PRE(cspan[0], cspan[1], cspan[2], cspan[3], ufrac);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u - 1, v + 1, cspan, 4);
t2 = bicubic_largb8u_PRE(cspan[0], cspan[1], cspan[2], cspan[3], ufrac);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u - 1, v + 2, cspan, 4);
t3 = bicubic_largb8u_PRE(cspan[0], cspan[1], cspan[2], cspan[3], ufrac);
span[i] = bicubic_largb8u_PRE(t0, t1, t2, t3, vfrac);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
ONYX2D_STATIC_INLINE O2Float cubic_f(O2Float v0, O2Float v1, O2Float v2,
O2Float v3, O2Float fraction)
{
O2Float p = (v3 - v2) - (v0 - v1);
O2Float q = (v0 - v1) - p;
return RI_CLAMP((p * (fraction * fraction * fraction)) +
(q * fraction * fraction) + ((v2 - v0) * fraction) +
v1,
0, 1);
}
O2argb32f bicubic_largb32f_PRE(O2argb32f a, O2argb32f b, O2argb32f c,
O2argb32f d, O2Float fraction)
{
return O2argb32fInit(cubic_f(a.r, b.r, c.r, d.r, fraction),
cubic_f(a.g, b.g, c.g, d.g, fraction),
cubic_f(a.b, b.b, c.b, d.b, fraction),
cubic_f(a.a, b.a, c.a, d.a, fraction));
}
void O2ImageBicubic_largb32f_PRE(O2Image *self, int x, int y, O2argb32f *span,
int length, O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
uv.x -= 0.5f;
uv.y -= 0.5f;
int u = RI_FLOOR_TO_INT(uv.x);
O2Float ufrac = uv.x - u;
int v = RI_FLOOR_TO_INT(uv.y);
O2Float vfrac = uv.y - v;
O2argb32f t0, t1, t2, t3;
O2argb32f cspan[4];
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u - 1, v - 1, cspan,
4);
t0 = bicubic_largb32f_PRE(cspan[0], cspan[1], cspan[2], cspan[3],
ufrac);
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u - 1, v, cspan, 4);
t1 = bicubic_largb32f_PRE(cspan[0], cspan[1], cspan[2], cspan[3],
ufrac);
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u - 1, v + 1, cspan,
4);
t2 = bicubic_largb32f_PRE(cspan[0], cspan[1], cspan[2], cspan[3],
ufrac);
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u - 1, v + 2, cspan,
4);
t3 = bicubic_largb32f_PRE(cspan[0], cspan[1], cspan[2], cspan[3],
ufrac);
span[i] = bicubic_largb32f_PRE(t0, t1, t2, t3, vfrac);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImageBilinear_largb8u_PRE(O2Image *self, int x, int y, O2argb8u *span,
int length, O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
double a = surfaceToImage.a * COVERAGE_MULTIPLIER_FLOAT;
double b = surfaceToImage.b * COVERAGE_MULTIPLIER_FLOAT;
int i;
du -= 0.5;
dv -= 0.5;
// Coordinates are pre-scaled by 256 to avoid float multiplication and
// subtraction inside the loop for generating the coverage amount.
du *= COVERAGE_MULTIPLIER_FLOAT;
dv *= COVERAGE_MULTIPLIER_FLOAT;
for (i = 0; i < length; i++, x++) {
int uvx = du;
int uvy = dv;
int u = uvx >> 8;
int v = uvy >> 8;
uint32_t fu = uvx & 0xFF;
uint32_t oneMinusFu = inverseCoverage(fu);
O2argb8u line0[2];
O2argb8u line1[2];
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u, v, line0, 2);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u, v + 1, line1, 2);
O2argb8u c0 = O2argb8uMultiplyByCoverageAdd(line0[0], oneMinusFu,
line0[1], fu);
O2argb8u c1 = O2argb8uMultiplyByCoverageAdd(line1[0], oneMinusFu,
line1[1], fu);
uint32_t fv = uvy & 0xFF;
uint32_t oneMinusFv = inverseCoverage(fv);
span[i] = O2argb8uMultiplyByCoverageAdd(c0, oneMinusFv, c1, fv);
du += a;
dv += b;
}
}
void O2ImageBilinear_largb32f_PRE(O2Image *self, int x, int y, O2argb32f *span,
int length, O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
uv.x -= 0.5f;
uv.y -= 0.5f;
int u = RI_FLOOR_TO_INT(uv.x);
int v = RI_FLOOR_TO_INT(uv.y);
O2argb32f c00c01[2];
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u, v, c00c01, 2);
O2argb32f c01c11[2];
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, u, v + 1, c01c11, 2);
O2Float fu = uv.x - (O2Float) u;
O2Float fv = uv.y - (O2Float) v;
O2argb32f c0 =
O2argb32fAdd(O2argb32fMultiplyByFloat(c00c01[0], (1.0f - fu)),
O2argb32fMultiplyByFloat(c00c01[1], fu));
O2argb32f c1 =
O2argb32fAdd(O2argb32fMultiplyByFloat(c01c11[0], (1.0f - fu)),
O2argb32fMultiplyByFloat(c01c11[1], fu));
span[i] = O2argb32fAdd(O2argb32fMultiplyByFloat(c0, (1.0f - fv)),
O2argb32fMultiplyByFloat(c1, fv));
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImagePointSampling_largb8u_PRE(O2Image *self, int x, int y,
O2argb8u *span, int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, RI_FLOOR_TO_INT(uv.x),
RI_FLOOR_TO_INT(uv.y),
span + i, 1);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImagePointSampling_largb32f_PRE(O2Image *self, int x, int y,
O2argb32f *span, int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
O2ImageReadTileSpanExtendEdge__largb32f_PRE(self, RI_FLOOR_TO_INT(uv.x),
RI_FLOOR_TO_INT(uv.y),
span + i, 1);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
// Float translate, or float translate with flip
void O2ImageBilinearFloatTranslate_largb8u_PRE(O2Image *self, int x, int y,
O2argb8u *span, int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
du -= 0.5;
dv -= 0.5;
O2Float uvx = du;
O2Float uvy = dv;
int u = RI_FLOOR_TO_INT(uvx);
int v = RI_FLOOR_TO_INT(uvy);
unsigned fu = coverageFromZeroToOne(uvx - (O2Float) u);
unsigned oneMinusFu = inverseCoverage(fu);
unsigned fv = coverageFromZeroToOne(uvy - (O2Float) v);
unsigned oneMinusFv = inverseCoverage(fv);
O2argb8u line0[length + 1];
O2argb8u line1[length + 1];
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u, v + 0, line0,
length + 1);
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, u, v + 1, line1,
length + 1);
for (i = 0; i < length; i++) {
O2argb8u c0 = O2argb8uMultiplyByCoverageAdd(line0[i], oneMinusFu,
line0[i + 1], fu);
O2argb8u c1 = O2argb8uMultiplyByCoverageAdd(line1[i], oneMinusFu,
line1[i + 1], fu);
span[i] = O2argb8uMultiplyByCoverageAdd(c0, oneMinusFv, c1, fv);
}
}
// Translate or translate with -1 flip
void O2ImageIntegerTranslate_largb8u_PRE(O2Image *self, int x, int y,
O2argb8u *span, int length,
O2AffineTransform surfaceToImage)
{
int du = x + surfaceToImage.tx;
int dv = ((y + 0.5) * surfaceToImage.d + surfaceToImage.ty) - 0.5;
O2ImageReadTileSpanExtendEdge_largb8u_PRE(self, du, dv, span, length);
}
// clamp premultiplied color to alpha to enforce consistency
ONYX2D_STATIC void clampSpan_largb32f_PRE(O2argb32f *span, int length) {
int i;
for (i = 0; i < length; i++) {
span[i].r = RI_MIN(span[i].r, span[i].a);
span[i].g = RI_MIN(span[i].g, span[i].a);
span[i].b = RI_MIN(span[i].b, span[i].a);
}
}
ONYX2D_STATIC_INLINE void O2RGBPremultiplySpan(O2argb32f *span, int length) {
int i;
for (i = 0; i < length; i++) {
span[i].r *= span[i].a;
span[i].g *= span[i].a;
span[i].b *= span[i].a;
}
}
O2argb8u *O2Image_read_argb8u(O2Image *self, int x, int y, O2argb8u *span,
int length)
{
return self->_read_argb8u(self, x, y, span, length);
}
O2argb32f *O2Image_read_argb32f(O2Image *self, int x, int y, O2argb32f *span,
int length)
{
O2argb32f *direct = self->_read_argb32f(self, x, y, span, length);
if (direct != NULL)
span = direct;
if (self->_clampExternalPixels)
clampSpan_largb32f_PRE(span,
length); // We don't need to do this for
// internally generated images (context)
return NULL;
}
uint8_t *O2Image_read_a8u(O2Image *self, int x, int y, uint8_t *coverage,
int length)
{
return self->_read_a8u(self, x, y, coverage, length);
}
O2Float *O2ImageReadSpan_Af_MASK(O2Image *self, int x, int y, O2Float *coverage,
int length)
{
return self->_read_a32f(self, x, y, coverage, length);
}
void O2ImageReadTexelTileRepeat_largb8u_PRE(O2Image *self, int u, int v,
O2argb8u *span, int length)
{
int i;
v = RI_INT_MOD(v, self->_height);
for (i = 0; i < length; i++, u++) {
u = RI_INT_MOD(u, self->_width);
O2argb8u *direct = O2Image_read_argb8u(self, u, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
}
void O2ImageReadTexelTileRepeat_largb32f_PRE(O2Image *self, int u, int v,
O2argb32f *span, int length)
{
int i;
v = RI_INT_MOD(v, self->_height);
for (i = 0; i < length; i++, u++) {
u = RI_INT_MOD(u, self->_width);
O2argb32f *direct = O2Image_read_argb32f(self, u, v, span + i, 1);
if (direct != NULL)
span[i] = direct[0];
}
}
void O2ImagePattern_Bilinear(O2Image *self, O2Float x, O2Float y,
O2argb32f *span, int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
uv.x -= 0.5f;
uv.y -= 0.5f;
int u = RI_FLOOR_TO_INT(uv.x);
int v = RI_FLOOR_TO_INT(uv.y);
O2argb32f c00c01[2];
O2ImageReadTexelTileRepeat_largb32f_PRE(self, u, v, c00c01, 2);
O2argb32f c01c11[2];
O2ImageReadTexelTileRepeat_largb32f_PRE(self, u, v + 1, c01c11, 2);
O2Float fu = uv.x - (O2Float) u;
O2Float fv = uv.y - (O2Float) v;
O2argb32f c0 =
O2argb32fAdd(O2argb32fMultiplyByFloat(c00c01[0], (1.0f - fu)),
O2argb32fMultiplyByFloat(c00c01[1], fu));
O2argb32f c1 =
O2argb32fAdd(O2argb32fMultiplyByFloat(c01c11[0], (1.0f - fu)),
O2argb32fMultiplyByFloat(c01c11[1], fu));
span[i] = O2argb32fAdd(O2argb32fMultiplyByFloat(c0, (1.0f - fv)),
O2argb32fMultiplyByFloat(c1, fv));
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImagePattern_PointSampling_largb8u_PRE(O2Image *self, O2Float x,
O2Float y, O2argb8u *span,
int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
O2ImageReadTexelTileRepeat_largb8u_PRE(self, RI_FLOOR_TO_INT(uv.x),
RI_FLOOR_TO_INT(uv.y), span + i,
1);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImagePattern_PointSampling_largb32f_PRE(O2Image *self, O2Float x,
O2Float y, O2argb32f *span,
int length,
O2AffineTransform surfaceToImage)
{
double du = (x + 0.5) * surfaceToImage.a + (y + 0.5) * surfaceToImage.c +
surfaceToImage.tx;
double dv = (x + 0.5) * surfaceToImage.b + (y + 0.5) * surfaceToImage.d +
surfaceToImage.ty;
int i;
for (i = 0; i < length; i++, x++) {
O2Point uv = O2PointMake(du, dv);
O2ImageReadTexelTileRepeat_largb32f_PRE(self, RI_FLOOR_TO_INT(uv.x),
RI_FLOOR_TO_INT(uv.y), span + i,
1);
du += surfaceToImage.a;
dv += surfaceToImage.b;
}
}
void O2ImageReadPatternSpan_largb8u_PRE(O2Image *self, O2Float x, O2Float y,
O2argb8u *span, int length,
O2AffineTransform surfaceToImage,
O2PatternTiling distortion)
{
switch (distortion) {
case kO2PatternTilingNoDistortion:
case kO2PatternTilingConstantSpacingMinimalDistortion:
case kO2PatternTilingConstantSpacing:
O2ImagePattern_PointSampling_largb8u_PRE(self, x, y, span, length,
surfaceToImage);
break;
}
}
void O2ImageReadPatternSpan_largb32f_PRE(O2Image *self, O2Float x, O2Float y,
O2argb32f *span, int length,
O2AffineTransform surfaceToImage,
O2PatternTiling distortion)
{
switch (distortion) {
case kO2PatternTilingNoDistortion:
O2ImagePattern_PointSampling_largb32f_PRE(self, x, y, span, length,
surfaceToImage);
break;
case kO2PatternTilingConstantSpacingMinimalDistortion:
case kO2PatternTilingConstantSpacing:
default:
O2ImagePattern_Bilinear(self, x, y, span, length, surfaceToImage);
break;
}
}
- (NSString *) description {
return [NSString
stringWithFormat:
@"<%@:%p> "
@"width=%d,height=%d,bpc=%d,bpp=%d,bpr=%d,bminfo=%x data "
@"length=%d",
[self class], self, _width, _height, _bitsPerComponent,
_bitsPerPixel, _bytesPerRow, _bitmapInfo,
[_provider length]];
}
@end
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