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kojima
2000-02-16 18:22:46 +00:00
parent 23c40b0540
commit a0ebed9cb2
6 changed files with 195 additions and 41 deletions
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51
wrlib/gradient.c
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@@ -149,6 +149,8 @@ renderHGradient(unsigned width, unsigned height, int r0, int g0, int b0,
return image;
}
/*
*----------------------------------------------------------------------
* renderVGradient--
@@ -178,7 +180,7 @@ renderVGradient(unsigned width, unsigned height, int r0, int g0, int b0,
return NULL;
}
iptr = (unsigned int*)ptr = image->data;
r = r0<<16;
g = g0<<16;
b = b0<<16;
@@ -186,22 +188,29 @@ renderVGradient(unsigned width, unsigned height, int r0, int g0, int b0,
dr = ((rf-r0)<<16)/(int)height;
dg = ((gf-g0)<<16)/(int)height;
db = ((bf-b0)<<16)/(int)height;
for (i=0; i<height; i++) {
rr = r>>16;
gg = g>>16;
bb = b>>16;
for (j=0; j<width/4; j++) {
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
*ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
for (j=0; j<width/8; j++) {
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
*(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
switch (width%4) {
case 3: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 2: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
case 1: *ptr++ = rr; *ptr++ = gg; *ptr++ = bb;
switch (width%8) {
case 7: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 6: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 5: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 4: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 3: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 2: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
case 1: *(ptr++) = rr; *(ptr++) = gg; *(ptr++) = bb;
}
r+=dr;
g+=dg;
@@ -231,8 +240,8 @@ renderDGradient(unsigned width, unsigned height, int r0, int g0, int b0,
int rf, int gf, int bf)
{
RImage *image, *tmp;
int i, j, offset;
float a;
int j;
float a, offset;
char *ptr;
if (width == 1)
@@ -257,9 +266,9 @@ renderDGradient(unsigned width, unsigned height, int r0, int g0, int b0,
width = width * 3;
/* copy the first line to the other lines with corresponding offset */
for (i=0, j=0, offset=0; i<height; i++, j += width) {
offset = (int)(a*i+0.5)*3;
memcpy(&(image->data[j]), &ptr[offset], width);
for (j=0, offset=0.0; j<width*height; j += width) {
memcpy(&(image->data[j]), &ptr[3*(int)offset], width);
offset += a;
}
RDestroyImage(tmp);
@@ -431,8 +440,8 @@ static RImage*
renderMDGradient(unsigned width, unsigned height, RColor **colors, int count)
{
RImage *image, *tmp;
float a;
int i, offset, j;
float a, offset;
int j;
unsigned char *ptr;
assert(count > 2);
@@ -470,9 +479,9 @@ renderMDGradient(unsigned width, unsigned height, RColor **colors, int count)
width = width * 3;
/* copy the first line to the other lines with corresponding offset */
for (i=0, j=0, offset=0; i<height; i++, j += width) {
offset = (int)(a*i+0.5)*3;
memcpy(&(image->data[j]), &ptr[offset], width);
for (j=0, offset=0; j<width*height; j += width) {
memcpy(&(image->data[j]), &ptr[3*(int)offset], width);
offset += a;
}
RDestroyImage(tmp);
return image;