Remove unused functions
gdImageRotate() and gdImageRotate45() are neither used by GD nor exported, so we remove them.master
Christoph M. Becker
parent
69d2fd2c59
commit
1f57639f04
179
src/gd_rotate.c
179
src/gd_rotate.c
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@ -362,182 +362,3 @@ gdImagePtr gdImageRotate270 (gdImagePtr src, int ignoretransparent)
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return dst;
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}
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gdImagePtr gdImageRotate45 (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent)
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{
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gdImagePtr dst1,dst2,dst3;
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double dRadAngle, dSinE, dTan, dShear;
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double dOffset; /* Variable skew offset */
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int u, iShear, newx, newy;
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int clrBackR, clrBackG, clrBackB, clrBackA;
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/* See GEMS I for the algorithm details */
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dRadAngle = dAngle * ROTATE_DEG2RAD; /* Angle in radians */
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dSinE = sin (dRadAngle);
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dTan = tan (dRadAngle / 2.0);
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newx = (int)(src->sx + src->sy * fabs(dTan));
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newy = src->sy;
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/* 1st shear */
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dst1 = gdImageCreateTrueColor(newx, newy);
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/******* Perform 1st shear (horizontal) ******/
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if (dst1 == NULL) {
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return NULL;
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}
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gdImageAlphaBlending(dst1, 0);
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if (dAngle == 0.0) {
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/* Returns copy of src */
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gdImageCopy (dst1, src,0,0,0,0,src->sx,src->sy);
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return dst1;
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}
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gdImagePaletteCopy (dst1, src);
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if (ignoretransparent) {
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if (gdImageTrueColor(src)) {
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dst1->transparent = src->transparent;
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} else {
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dst1->transparent = gdTrueColorAlpha(gdImageRed(src, src->transparent), gdImageBlue(src, src->transparent), gdImageGreen(src, src->transparent), 127);
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}
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}
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for (u = 0; u < dst1->sy; u++) {
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if (dTan >= 0.0) {
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dShear = ((double)(u + 0.5)) * dTan;
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} else {
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dShear = ((double)(u - dst1->sy) + 0.5) * dTan;
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}
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iShear = (int)floor(dShear);
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gdImageSkewX(dst1, src, u, iShear, (dShear - iShear), clrBack, ignoretransparent);
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}
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/*
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The 1st shear may use the original clrBack as color index
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Convert it once here
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*/
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if(!src->trueColor) {
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clrBackR = gdImageRed(src, clrBack);
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clrBackG = gdImageGreen(src, clrBack);
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clrBackB = gdImageBlue(src, clrBack);
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clrBackA = gdImageAlpha(src, clrBack);
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clrBack = gdTrueColorAlpha(clrBackR, clrBackG, clrBackB, clrBackA);
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}
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/* 2nd shear */
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newx = dst1->sx;
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if (dSinE > 0.0) {
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dOffset = (src->sx-1) * dSinE;
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} else {
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dOffset = -dSinE * (src->sx - newx);
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}
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newy = (int) ((double) src->sx * fabs( dSinE ) + (double) src->sy * cos (dRadAngle))+1;
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dst2 = gdImageCreateTrueColor(newx, newy);
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if (dst2 == NULL) {
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gdImageDestroy(dst1);
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return NULL;
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}
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gdImageAlphaBlending(dst2, 0);
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if (ignoretransparent) {
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dst2->transparent = dst1->transparent;
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}
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for (u = 0; u < dst2->sx; u++, dOffset -= dSinE) {
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iShear = (int)floor (dOffset);
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gdImageSkewY(dst2, dst1, u, iShear, (dOffset - (double)iShear), clrBack, ignoretransparent);
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}
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/* 3rd shear */
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gdImageDestroy(dst1);
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newx = (int) ((double)src->sy * fabs (dSinE) + (double)src->sx * cos (dRadAngle)) + 1;
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newy = dst2->sy;
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dst3 = gdImageCreateTrueColor(newx, newy);
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if (dst3 == NULL) {
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gdImageDestroy(dst2);
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return NULL;
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}
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gdImageAlphaBlending(dst3, 0);
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if (ignoretransparent) {
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dst3->transparent = dst2->transparent;
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}
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if (dSinE >= 0.0) {
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dOffset = (double)(src->sx - 1) * dSinE * -dTan;
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} else {
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dOffset = dTan * ((double)(src->sx - 1) * -dSinE + (double)(1 - newy));
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}
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for (u = 0; u < dst3->sy; u++, dOffset += dTan) {
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int iShear = (int)floor(dOffset);
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gdImageSkewX(dst3, dst2, u, iShear, (dOffset - iShear), clrBack, ignoretransparent);
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}
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gdImageDestroy(dst2);
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return dst3;
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}
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gdImagePtr gdImageRotate (gdImagePtr src, double dAngle, int clrBack, int ignoretransparent)
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{
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gdImagePtr pMidImg;
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gdImagePtr rotatedImg;
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if (src == NULL) {
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return NULL;
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}
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if (!gdImageTrueColor(src) && (clrBack < 0 || clrBack>=gdImageColorsTotal(src))) {
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return NULL;
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}
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while (dAngle >= 360.0) {
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dAngle -= 360.0;
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}
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while (dAngle < 0) {
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dAngle += 360.0;
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}
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if (dAngle == 90.00) {
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return gdImageRotate90(src, ignoretransparent);
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}
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if (dAngle == 180.00) {
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return gdImageRotate180(src, ignoretransparent);
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}
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if(dAngle == 270.00) {
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return gdImageRotate270 (src, ignoretransparent);
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}
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if ((dAngle > 45.0) && (dAngle <= 135.0)) {
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pMidImg = gdImageRotate90 (src, ignoretransparent);
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dAngle -= 90.0;
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} else if ((dAngle > 135.0) && (dAngle <= 225.0)) {
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pMidImg = gdImageRotate180 (src, ignoretransparent);
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dAngle -= 180.0;
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} else if ((dAngle > 225.0) && (dAngle <= 315.0)) {
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pMidImg = gdImageRotate270 (src, ignoretransparent);
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dAngle -= 270.0;
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} else {
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return gdImageRotate45 (src, dAngle, clrBack, ignoretransparent);
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}
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if (pMidImg == NULL) {
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return NULL;
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}
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rotatedImg = gdImageRotate45 (pMidImg, dAngle, clrBack, ignoretransparent);
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gdImageDestroy(pMidImg);
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return rotatedImg;
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}
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/* End Rotate function */
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