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Diffstat (limited to 'ext/gd/libgd/gd.c')
| -rw-r--r-- | ext/gd/libgd/gd.c | 534 |
1 files changed, 0 insertions, 534 deletions
diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c index 7b6dcdc1fc..d66bbbfad8 100644 --- a/ext/gd/libgd/gd.c +++ b/ext/gd/libgd/gd.c @@ -2557,540 +2557,6 @@ void gdImageCopyResampled (gdImagePtr dst, gdImagePtr src, int dstX, int dstY, i } } - -/* - * Rotate function Added on 2003/12 - * by Pierre-Alain Joye (pajoye@pearfr.org) - **/ -/* Begin rotate function */ -#ifdef ROTATE_PI -#undef ROTATE_PI -#endif /* ROTATE_PI */ - -#define ROTATE_DEG2RAD 3.1415926535897932384626433832795/180 -void gdImageSkewX (gdImagePtr dst, gdImagePtr src, int uRow, int iOffset, double dWeight, int clrBack, int ignoretransparent) -{ - typedef int (*FuncPtr)(gdImagePtr, int, int); - int i, r, g, b, a, clrBackR, clrBackG, clrBackB, clrBackA; - FuncPtr f; - - int pxlOldLeft, pxlLeft=0, pxlSrc; - - /* Keep clrBack as color index if required */ - if (src->trueColor) { - pxlOldLeft = clrBack; - f = gdImageGetTrueColorPixel; - } else { - pxlOldLeft = clrBack; - clrBackR = gdImageRed(src, clrBack); - clrBackG = gdImageGreen(src, clrBack); - clrBackB = gdImageBlue(src, clrBack); - clrBackA = gdImageAlpha(src, clrBack); - clrBack = gdTrueColorAlpha(clrBackR, clrBackG, clrBackB, clrBackA); - f = gdImageGetPixel; - } - - for (i = 0; i < iOffset; i++) { - gdImageSetPixel (dst, i, uRow, clrBack); - } - - if (i < dst->sx) { - gdImageSetPixel (dst, i, uRow, clrBack); - } - - for (i = 0; i < src->sx; i++) { - pxlSrc = f (src,i,uRow); - - r = (int)(gdImageRed(src,pxlSrc) * dWeight); - g = (int)(gdImageGreen(src,pxlSrc) * dWeight); - b = (int)(gdImageBlue(src,pxlSrc) * dWeight); - a = (int)(gdImageAlpha(src,pxlSrc) * dWeight); - - pxlLeft = gdImageColorAllocateAlpha(src, r, g, b, a); - - if (pxlLeft == -1) { - pxlLeft = gdImageColorClosestAlpha(src, r, g, b, a); - } - - r = gdImageRed(src,pxlSrc) - (gdImageRed(src,pxlLeft) - gdImageRed(src,pxlOldLeft)); - g = gdImageGreen(src,pxlSrc) - (gdImageGreen(src,pxlLeft) - gdImageGreen(src,pxlOldLeft)); - b = gdImageBlue(src,pxlSrc) - (gdImageBlue(src,pxlLeft) - gdImageBlue(src,pxlOldLeft)); - a = gdImageAlpha(src,pxlSrc) - (gdImageAlpha(src,pxlLeft) - gdImageAlpha(src,pxlOldLeft)); - - if (r>255) { - r = 255; - } - - if (g>255) { - g = 255; - } - - if (b>255) { - b = 255; - } - - if (a>127) { - a = 127; - } - - if (ignoretransparent && pxlSrc == dst->transparent) { - pxlSrc = dst->transparent; - } else { - pxlSrc = gdImageColorAllocateAlpha(dst, r, g, b, a); - - if (pxlSrc == -1) { - pxlSrc = gdImageColorClosestAlpha(dst, r, g, b, a); - } - } - - if ((i + iOffset >= 0) && (i + iOffset < dst->sx)) { - gdImageSetPixel (dst, i+iOffset, uRow, pxlSrc); - } - - pxlOldLeft = pxlLeft; - } - - i += iOffset; - - if (i < dst->sx) { - gdImageSetPixel (dst, i, uRow, pxlLeft); - } - - gdImageSetPixel (dst, iOffset, uRow, clrBack); - - i--; - - while (++i < dst->sx) { - gdImageSetPixel (dst, i, uRow, clrBack); - } -} - -void gdImageSkewY (gdImagePtr dst, gdImagePtr src, int uCol, int iOffset, double dWeight, int clrBack, int ignoretransparent) -{ - typedef int (*FuncPtr)(gdImagePtr, int, int); - int i, iYPos=0, r, g, b, a; - FuncPtr f; - int pxlOldLeft, pxlLeft=0, pxlSrc; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - - for (i = 0; i<=iOffset; i++) { - gdImageSetPixel (dst, uCol, i, clrBack); - } - r = (int)((double)gdImageRed(src,clrBack) * dWeight); - g = (int)((double)gdImageGreen(src,clrBack) * dWeight); - b = (int)((double)gdImageBlue(src,clrBack) * dWeight); - a = (int)((double)gdImageAlpha(src,clrBack) * dWeight); - - pxlOldLeft = gdImageColorAllocateAlpha(dst, r, g, b, a); - - for (i = 0; i < src->sy; i++) { - pxlSrc = f (src, uCol, i); - iYPos = i + iOffset; - - r = (int)((double)gdImageRed(src,pxlSrc) * dWeight); - g = (int)((double)gdImageGreen(src,pxlSrc) * dWeight); - b = (int)((double)gdImageBlue(src,pxlSrc) * dWeight); - a = (int)((double)gdImageAlpha(src,pxlSrc) * dWeight); - - pxlLeft = gdImageColorAllocateAlpha(src, r, g, b, a); - - if (pxlLeft == -1) { - pxlLeft = gdImageColorClosestAlpha(src, r, g, b, a); - } - - r = gdImageRed(src,pxlSrc) - (gdImageRed(src,pxlLeft) - gdImageRed(src,pxlOldLeft)); - g = gdImageGreen(src,pxlSrc) - (gdImageGreen(src,pxlLeft) - gdImageGreen(src,pxlOldLeft)); - b = gdImageBlue(src,pxlSrc) - (gdImageBlue(src,pxlLeft) - gdImageBlue(src,pxlOldLeft)); - a = gdImageAlpha(src,pxlSrc) - (gdImageAlpha(src,pxlLeft) - gdImageAlpha(src,pxlOldLeft)); - - if (r>255) { - r = 255; - } - - if (g>255) { - g = 255; - } - - if (b>255) { - b = 255; - } - - if (a>127) { - a = 127; - } - - if (ignoretransparent && pxlSrc == dst->transparent) { - pxlSrc = dst->transparent; - } else { - pxlSrc = gdImageColorAllocateAlpha(dst, r, g, b, a); - - if (pxlSrc == -1) { - pxlSrc = gdImageColorClosestAlpha(dst, r, g, b, a); - } - } - - if ((iYPos >= 0) && (iYPos < dst->sy)) { - gdImageSetPixel (dst, uCol, iYPos, pxlSrc); - } - - pxlOldLeft = pxlLeft; - } - - i = iYPos; - if (i < dst->sy) { - gdImageSetPixel (dst, uCol, i, pxlLeft); - } - - i--; - while (++i < dst->sy) { - gdImageSetPixel (dst, uCol, i, clrBack); - } -} - -/* Rotates an image by 90 degrees (counter clockwise) */ -gdImagePtr gdImageRotate90 (gdImagePtr src, int ignoretransparent) -{ - int uY, uX; - int c,r,g,b,a; - gdImagePtr dst; - typedef int (*FuncPtr)(gdImagePtr, int, int); - FuncPtr f; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - dst = gdImageCreateTrueColor(src->sy, src->sx); - dst->transparent = src->transparent; - - if (dst != NULL) { - int old_blendmode = dst->alphaBlendingFlag; - dst->alphaBlendingFlag = 0; - - gdImagePaletteCopy (dst, src); - - for (uY = 0; uY<src->sy; uY++) { - for (uX = 0; uX<src->sx; uX++) { - c = f (src, uX, uY); - if (!src->trueColor) { - r = gdImageRed(src,c); - g = gdImageGreen(src,c); - b = gdImageBlue(src,c); - a = gdImageAlpha(src,c); - c = gdTrueColorAlpha(r, g, b, a); - } - if (ignoretransparent && c == dst->transparent) { - gdImageSetPixel(dst, uY, (dst->sy - uX - 1), dst->transparent); - } else { - gdImageSetPixel(dst, uY, (dst->sy - uX - 1), c); - } - } - } - dst->alphaBlendingFlag = old_blendmode; - } - - return dst; -} - -/* Rotates an image by 180 degrees (counter clockwise) */ -gdImagePtr gdImageRotate180 (gdImagePtr src, int ignoretransparent) -{ - int uY, uX; - int c,r,g,b,a; - gdImagePtr dst; - typedef int (*FuncPtr)(gdImagePtr, int, int); - FuncPtr f; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - dst = gdImageCreateTrueColor(src->sx, src->sy); - dst->transparent = src->transparent; - - if (dst != NULL) { - int old_blendmode = dst->alphaBlendingFlag; - dst->alphaBlendingFlag = 0; - - gdImagePaletteCopy (dst, src); - - for (uY = 0; uY<src->sy; uY++) { - for (uX = 0; uX<src->sx; uX++) { - c = f (src, uX, uY); - if (!src->trueColor) { - r = gdImageRed(src,c); - g = gdImageGreen(src,c); - b = gdImageBlue(src,c); - a = gdImageAlpha(src,c); - c = gdTrueColorAlpha(r, g, b, a); - } - - if (ignoretransparent && c == dst->transparent) { - gdImageSetPixel(dst, (dst->sx - uX - 1), (dst->sy - uY - 1), dst->transparent); - } else { - gdImageSetPixel(dst, (dst->sx - uX - 1), (dst->sy - uY - 1), c); - } - } - } - dst->alphaBlendingFlag = old_blendmode; - } - - return dst; -} - -/* Rotates an image by 270 degrees (counter clockwise) */ -gdImagePtr gdImageRotate270 (gdImagePtr src, int ignoretransparent) -{ - int uY, uX; - int c,r,g,b,a; - gdImagePtr dst; - typedef int (*FuncPtr)(gdImagePtr, int, int); - FuncPtr f; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - dst = gdImageCreateTrueColor (src->sy, src->sx); - dst->transparent = src->transparent; - - if (dst != NULL) { - int old_blendmode = dst->alphaBlendingFlag; - dst->alphaBlendingFlag = 0; - - gdImagePaletteCopy (dst, src); - - for (uY = 0; uY<src->sy; uY++) { - for (uX = 0; uX<src->sx; uX++) { - c = f (src, uX, uY); - if (!src->trueColor) { - r = gdImageRed(src,c); - g = gdImageGreen(src,c); - b = gdImageBlue(src,c); - a = gdImageAlpha(src,c); - c = gdTrueColorAlpha(r, g, b, a); - } - - if (ignoretransparent && c == dst->transparent) { - gdImageSetPixel(dst, (dst->sx - uY - 1), uX, dst->transparent); - } else { - gdImageSetPixel(dst, (dst->sx - uY - 1), uX, c); - } - } - } - dst->alphaBlendingFlag = old_blendmode; - } - - return dst; -} - -gdImagePtr gdImageRotate45 (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent) -{ - typedef int (*FuncPtr)(gdImagePtr, int, int); - gdImagePtr dst1,dst2,dst3; - FuncPtr f; - double dRadAngle, dSinE, dTan, dShear; - double dOffset; /* Variable skew offset */ - int u, iShear, newx, newy; - int clrBackR, clrBackG, clrBackB, clrBackA; - - /* See GEMS I for the algorithm details */ - dRadAngle = dAngle * ROTATE_DEG2RAD; /* Angle in radians */ - dSinE = sin (dRadAngle); - dTan = tan (dRadAngle / 2.0); - - newx = (int)(src->sx + src->sy * fabs(dTan)); - newy = src->sy; - - /* 1st shear */ - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - - dst1 = gdImageCreateTrueColor(newx, newy); - /******* Perform 1st shear (horizontal) ******/ - if (dst1 == NULL) { - return NULL; - } - dst1->alphaBlendingFlag = gdEffectReplace; - - if (dAngle == 0.0) { - /* Returns copy of src */ - gdImageCopy (dst1, src,0,0,0,0,src->sx,src->sy); - return dst1; - } - - gdImagePaletteCopy (dst1, src); - - if (ignoretransparent) { - if (gdImageTrueColor(src)) { - dst1->transparent = src->transparent; - } else { - - dst1->transparent = gdTrueColorAlpha(gdImageRed(src, src->transparent), gdImageBlue(src, src->transparent), gdImageGreen(src, src->transparent), 127); - } - } - - dRadAngle = dAngle * ROTATE_DEG2RAD; /* Angle in radians */ - dSinE = sin (dRadAngle); - dTan = tan (dRadAngle / 2.0); - - for (u = 0; u < dst1->sy; u++) { - if (dTan >= 0.0) { - dShear = ((double)(u + 0.5)) * dTan; - } else { - dShear = ((double)(u - dst1->sy) + 0.5) * dTan; - } - - iShear = (int)floor(dShear); - gdImageSkewX(dst1, src, u, iShear, (dShear - iShear), clrBack, ignoretransparent); - } - - /* - The 1st shear may use the original clrBack as color index - Convert it once here - */ - if(!src->trueColor) { - clrBackR = gdImageRed(src, clrBack); - clrBackG = gdImageGreen(src, clrBack); - clrBackB = gdImageBlue(src, clrBack); - clrBackA = gdImageAlpha(src, clrBack); - clrBack = gdTrueColorAlpha(clrBackR, clrBackG, clrBackB, clrBackA); - } - /* 2nd shear */ - newx = dst1->sx; - - if (dSinE > 0.0) { - dOffset = (src->sx-1) * dSinE; - } else { - dOffset = -dSinE * (src->sx - newx); - } - - newy = (int) ((double) src->sx * fabs( dSinE ) + (double) src->sy * cos (dRadAngle))+1; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - dst2 = gdImageCreateTrueColor(newx, newy); - if (dst2 == NULL) { - gdImageDestroy(dst1); - return NULL; - } - dst2->alphaBlendingFlag = gdEffectReplace; - if (ignoretransparent) { - dst2->transparent = dst1->transparent; - } - - for (u = 0; u < dst2->sx; u++, dOffset -= dSinE) { - iShear = (int)floor (dOffset); - gdImageSkewY(dst2, dst1, u, iShear, (dOffset - (double)iShear), clrBack, ignoretransparent); - } - - /* 3rd shear */ - gdImageDestroy(dst1); - - newx = (int) ((double)src->sy * fabs (dSinE) + (double)src->sx * cos (dRadAngle)) + 1; - newy = dst2->sy; - - if (src->trueColor) { - f = gdImageGetTrueColorPixel; - } else { - f = gdImageGetPixel; - } - dst3 = gdImageCreateTrueColor(newx, newy); - if (dst3 == NULL) { - gdImageDestroy(dst2); - return NULL; - } - - dst3->alphaBlendingFlag = gdEffectReplace; - if (ignoretransparent) { - dst3->transparent = dst2->transparent; - } - - if (dSinE >= 0.0) { - dOffset = (double)(src->sx - 1) * dSinE * -dTan; - } else { - dOffset = dTan * ((double)(src->sx - 1) * -dSinE + (double)(1 - newy)); - } - - for (u = 0; u < dst3->sy; u++, dOffset += dTan) { - int iShear = (int)floor(dOffset); - gdImageSkewX(dst3, dst2, u, iShear, (dOffset - iShear), clrBack, ignoretransparent); - } - - gdImageDestroy(dst2); - - return dst3; -} - -gdImagePtr gdImageRotate (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent) -{ - gdImagePtr pMidImg; - gdImagePtr rotatedImg; - - if (src == NULL) { - return NULL; - } - - if (!gdImageTrueColor(src) && (clrBack < 0 || clrBack>=gdImageColorsTotal(src))) { - return NULL; - } - - while (dAngle >= 360.0) { - dAngle -= 360.0; - } - - while (dAngle < 0) { - dAngle += 360.0; - } - - if (dAngle == 90.00) { - return gdImageRotate90(src, ignoretransparent); - } - if (dAngle == 180.00) { - return gdImageRotate180(src, ignoretransparent); - } - if(dAngle == 270.00) { - return gdImageRotate270 (src, ignoretransparent); - } - - if ((dAngle > 45.0) && (dAngle <= 135.0)) { - pMidImg = gdImageRotate90 (src, ignoretransparent); - dAngle -= 90.0; - } else if ((dAngle > 135.0) && (dAngle <= 225.0)) { - pMidImg = gdImageRotate180 (src, ignoretransparent); - dAngle -= 180.0; - } else if ((dAngle > 225.0) && (dAngle <= 315.0)) { - pMidImg = gdImageRotate270 (src, ignoretransparent); - dAngle -= 270.0; - } else { - return gdImageRotate45 (src, dAngle, clrBack, ignoretransparent); - } - - if (pMidImg == NULL) { - return NULL; - } - - rotatedImg = gdImageRotate45 (pMidImg, dAngle, clrBack, ignoretransparent); - gdImageDestroy(pMidImg); - - return rotatedImg; -} -/* End Rotate function */ - void gdImagePolygon (gdImagePtr im, gdPointPtr p, int n, int c) { int i; 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