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asm optimization for 8bpp (no mmx)

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kojima
2000-01-21 21:04:20 +00:00
parent 34cd5125e3
commit 58ca0c2824
5 changed files with 279 additions and 115 deletions
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25
wrlib/gradient.c
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@@ -231,8 +231,9 @@ renderDGradient(unsigned width, unsigned height, int r0, int g0, int b0,
int rf, int gf, int bf)
{
RImage *image, *tmp;
unsigned long a;
int i, j, offset;
float a;
char *ptr;
if (width == 1)
return renderVGradient(width, height, r0, g0, b0, rf, gf, bf);
@@ -249,15 +250,18 @@ renderDGradient(unsigned width, unsigned height, int r0, int g0, int b0,
RDestroyImage(image);
return NULL;
}
a = (((width - 1)<<16) / (height - 1));
ptr = tmp->data;
width *= 3;
a = ((float)(width - 1))/((float)(height - 1));
/* copy the first line to the other lines with corresponding offset */
for (i=0, j=0, offset = 0; i<height; i++, j+= width) {
offset += a;
memcpy(&(image->data[j]), &(tmp->data[(offset>>16)*3]), width);
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);
}
RDestroyImage(tmp);
return image;
}
@@ -428,7 +432,8 @@ renderMDGradient(unsigned width, unsigned height, RColor **colors, int count)
{
RImage *image, *tmp;
float a;
int i, offset;
int i, offset, j;
unsigned char *ptr;
assert(count > 2);
@@ -459,13 +464,15 @@ renderMDGradient(unsigned width, unsigned height, RColor **colors, int count)
RDestroyImage(image);
return NULL;
}
ptr = tmp->data;
a = ((float)(width - 1))/((float)(height - 1));
/* copy the first line to the other lines with corresponding offset */
for (i=0; i<height; i++) {
for (i=0, j=0, offset=0; i<height; i++, j += width) {
offset = (int)(a*i+0.5)*3;
memcpy(&(image->data[i*width*3]), &(tmp->data[offset]), width*3);
memcpy(&(image->data[j]), &ptr[offset], width);
}
RDestroyImage(tmp);
return image;