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no crashing in splitvertical

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This commit is contained in:
Dana Jansens 2007-06-09 01:18:19 +00:00
parent b60e471705
commit 44fa95eea8
1 changed files with 12 additions and 7 deletions
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19
render/gradient.c
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@ -425,6 +425,7 @@ static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
RrPixel32 *data = sf->pixel_data;
RrPixel32 current;
RrColor *primary_light, *secondary_light;
gint y1sz, y2sz, y3sz;
VARS(y1);
VARS(y2);
@ -452,12 +453,16 @@ static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
if (b > 0xFF) b = 0xFF;
secondary_light = RrColorNew(a->inst, r, g, b);
SETUP(y1, primary_light, sf->primary, (h / 2) - 1);
/* setup to get the colors in between these 2 */
SETUP(y2, sf->primary, sf->secondary, h % 2 ? 5 : 4);
SETUP(y3, sf->secondary, secondary_light, (h / 2) - 1);
y1sz = MAX(h/2 - 1, 1);
/* setup to get the colors _in between_ these other 2 */
y2sz = (h < 3 ? 0 : (h % 2 ? 3 : 2));
y3sz = MAX(h/2 - 1, 0);
for (y1 = (h / 2) - 1; y1 > 0; --y1) {
SETUP(y1, primary_light, sf->primary, y1sz);
SETUP(y2, sf->primary, sf->secondary, y2sz);
SETUP(y3, sf->secondary, secondary_light, y3sz);
for (y1 = y1sz; y1 > 0; --y1) {
current = COLOR(y1);
for (x = w - 1; x >= 0; --x)
*(data++) = current;
@ -466,7 +471,7 @@ static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
}
NEXT(y2); /* skip the first one, its the same as the last of y1 */
for (y2 = (h % 2 ? 3 : 2); y2 > 0; --y2) {
for (y2 = y2sz; y2 > 0; --y2) {
current = COLOR(y2);
for (x = w - 1; x >= 0; --x)
*(data++) = current;
@ -474,7 +479,7 @@ static void gradient_splitvertical(RrAppearance *a, gint w, gint h)
NEXT(y2);
}
for (y3 = (h / 2) - 1; y3 > 0; --y3) {
for (y3 = y3sz; y3 > 0; --y3) {
current = COLOR(y3);
for (x = w - 1; x >= 0; --x)
*(data++) = current;