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Patch from Andrew Johnson to speed up vertical gradients. Fixes #169982.
2005-07-12 Elijah Newren <newren@gmail.com> Patch from Andrew Johnson to speed up vertical gradients. Fixes #169982. * src/gradient.c: (meta_gradient_create_interwoven): (meta_gradient_create_vertical): (meta_gradient_create_multi_vertical): use memcpy instead of really long loops to set values in memory to a given pattern.
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Elijah Newren
Elijah Newren
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13
ChangeLog
13
ChangeLog
@ -1,3 +1,16 @@
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2005-07-12 Elijah Newren <newren@gmail.com>
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Patch from Andrew Johnson to speed up vertical gradients. Fixes
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#169982.
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* src/gradient.c:
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(meta_gradient_create_interwoven):
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(meta_gradient_create_vertical):
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(meta_gradient_create_multi_vertical):
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use memcpy instead of really long loops to set values in memory to
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a given pattern.
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2005-07-12 Elijah Newren <newren@gmail.com>
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Patch from Björn Lindqvist to split up main() into more manageable
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127
src/gradient.c
127
src/gradient.c
@ -166,7 +166,6 @@ meta_gradient_create_interwoven (int width,
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long r2, g2, b2, dr2, dg2, db2;
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GdkPixbuf *pixbuf;
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unsigned char *ptr;
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unsigned char rr, gg, bb;
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unsigned char *pixels;
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int rowstride;
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@ -199,37 +198,21 @@ meta_gradient_create_interwoven (int width,
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if (k == 0)
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{
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rr = r1>>16;
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gg = g1>>16;
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bb = b1>>16;
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ptr[0] = (unsigned char) r1>>16;
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ptr[1] = (unsigned char) g1>>16;
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ptr[2] = (unsigned char) b1>>16;
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}
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else
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{
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rr = r2>>16;
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gg = g2>>16;
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bb = b2>>16;
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}
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for (j=0; j<width/8; j++)
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{
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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}
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switch (width%8)
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{
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case 7: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 6: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 5: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 4: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 3: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 2: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 1: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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ptr[0] = (unsigned char) r2>>16;
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ptr[1] = (unsigned char) g2>>16;
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ptr[2] = (unsigned char) b2>>16;
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}
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for (j=1; j <= width/2; j *= 2)
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memcpy (&(ptr[j*3]), ptr, j*3);
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memcpy (&(ptr[j*3]), ptr, (width - j)*3);
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if (++l == ll)
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{
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if (k == 0)
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@ -346,7 +329,6 @@ meta_gradient_create_vertical (int width, int height,
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long r, g, b, dr, dg, db;
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GdkPixbuf *pixbuf;
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unsigned char *ptr;
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unsigned char rr, gg, bb;
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int r0, g0, b0;
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int rf, gf, bf;
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int rowstride;
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@ -378,30 +360,14 @@ meta_gradient_create_vertical (int width, int height,
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{
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ptr = pixels + i * rowstride;
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rr = r>>16;
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gg = g>>16;
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bb = b>>16;
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for (j=0; j<width/8; j++)
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{
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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}
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switch (width%8)
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{
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case 7: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 6: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 5: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 4: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 3: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 2: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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case 1: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
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}
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ptr[0] = (unsigned char)(r>>16);
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ptr[1] = (unsigned char)(g>>16);
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ptr[2] = (unsigned char)(b>>16);
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for (j=1; j <= width/2; j *= 2)
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memcpy (&(ptr[j*3]), ptr, j*3);
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memcpy (&(ptr[j*3]), ptr, (width - j)*3);
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r+=dr;
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g+=dg;
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b+=db;
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@ -565,9 +531,7 @@ meta_gradient_create_multi_vertical (int width, int height,
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unsigned char *ptr, *tmp, *pixels;
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int height2;
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int x;
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unsigned char rr, gg, bb;
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int rowstride;
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int pad;
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g_return_val_if_fail (count > 2, NULL);
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@ -577,7 +541,6 @@ meta_gradient_create_multi_vertical (int width, int height,
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pixels = gdk_pixbuf_get_pixels (pixbuf);
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rowstride = gdk_pixbuf_get_rowstride (pixbuf);
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pad = rowstride - (width * 3);
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ptr = pixels;
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if (count > height)
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@ -602,25 +565,15 @@ meta_gradient_create_multi_vertical (int width, int height,
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for (j=0; j<height2; j++)
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{
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rr = r>>16;
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gg = g>>16;
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bb = b>>16;
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ptr[0] = (unsigned char)(r>>16);
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ptr[1] = (unsigned char)(g>>16);
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ptr[2] = (unsigned char)(b>>16);
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for (x=0; x<width/4; x++)
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{
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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}
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switch (width%4)
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{
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case 3: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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case 2: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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case 1: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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}
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for (x=1; x <= width/2; x *= 2)
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memcpy (&(ptr[x*3]), ptr, x*3);
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memcpy (&(ptr[x*3]), ptr, (width - x)*3);
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ptr += pad;
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ptr += rowstride;
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r += dr;
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g += dg;
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@ -632,29 +585,19 @@ meta_gradient_create_multi_vertical (int width, int height,
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b = colors[i].blue << 8;
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}
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rr = r>>16;
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gg = g>>16;
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bb = b>>16;
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if (k<height)
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{
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tmp = ptr;
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for (x=0; x<width/4; x++)
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{
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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}
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switch (width%4)
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{
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case 3: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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case 2: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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case 1: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
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default: break;
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}
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ptr += pad;
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ptr[0] = (unsigned char) r>>16;
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ptr[1] = (unsigned char) g>>16;
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ptr[2] = (unsigned char) b>>16;
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for (x=1; x <= width/2; x *= 2)
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memcpy (&(ptr[x*3]), ptr, x*3);
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memcpy (&(ptr[x*3]), ptr, (width - x)*3);
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ptr += rowstride;
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for (j=k+1; j<height; j++)
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{
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