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Loop optimizations in screencapture

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git-svn-id: https://svn.eduke32.com/eduke32@5867 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
hendricks266 2016-09-16 21:55:36 +00:00
parent 63030036ba
commit 388c3832cd
1 changed files with 25 additions and 12 deletions
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37
polymer/eduke32/build/src/screenshot.c
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@ -19,7 +19,7 @@ int16_t capturecount = 0;
static int32_t screencapture_common1(char *fn, const char *ext, BFILE** filptr)
{
int32_t i;
bssize_t i;
do // JBF 2004022: So we don't overwrite existing screenshots
{
@ -49,7 +49,6 @@ static int32_t screencapture_common1(char *fn, const char *ext, BFILE** filptr)
// PNG screenshots -- adapted from libpng example.c
static int32_t screencapture_png(const char *filename, char inverseit, const char *versionstr)
{
int32_t i;
BFILE *fp;
# ifdef USE_OPENGL
# define HICOLOR (getrendermode() >= REND_POLYMOST && in3dmode())
@ -64,12 +63,14 @@ static int32_t screencapture_png(const char *filename, char inverseit, const cha
png_bytep volatile buf = NULL;
png_bytepp volatile rowptrs = NULL;
bssize_t const s_xdim = xdim, s_ydim = ydim;
char fn[32]; // careful...
Bstrcpy(fn, filename);
i = screencapture_common1(fn, "png", &fp);
if (i)
return i;
int32_t const retval = screencapture_common1(fn, "png", &fp);
if (retval)
return retval;
/* Create and initialize the png_struct with default error handling. */
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
@ -121,11 +122,23 @@ static int32_t screencapture_png(const char *filename, char inverseit, const cha
if (palette)
{
for (i=0; i<256; i++)
if (inverseit)
{
palette[i].red = inverseit ? 255-curpalettefaded[i].r : curpalettefaded[i].r;
palette[i].green = inverseit ? 255-curpalettefaded[i].g : curpalettefaded[i].g;
palette[i].blue = inverseit ? 255-curpalettefaded[i].b : curpalettefaded[i].b;
for (bssize_t i = 0; i < 256; ++i)
{
palette[i].red = 255 - curpalettefaded[i].r;
palette[i].green = 255 - curpalettefaded[i].g;
palette[i].blue = 255 - curpalettefaded[i].b;
}
}
else
{
for (bssize_t i = 0; i < 256; ++i)
{
palette[i].red = curpalettefaded[i].r;
palette[i].green = curpalettefaded[i].g;
palette[i].blue = curpalettefaded[i].b;
}
}
png_set_PLTE(png_ptr, info_ptr, palette, 256);
@ -168,12 +181,12 @@ static int32_t screencapture_png(const char *filename, char inverseit, const cha
if (!palette)
{
for (i=0; i<ydim; i++)
rowptrs[i] = &buf[3*xdim*(ydim-i-1)];
for (bssize_t i = 0; i < s_ydim; ++i)
rowptrs[i] = &buf[3*s_xdim*(s_ydim-i-1)];
}
else
{
for (i=0; i<ydim; i++)
for (bssize_t i = 0; i < s_ydim; ++i)
rowptrs[i] = &buf[ylookup[i]];
}
png_set_rows(png_ptr, info_ptr, rowptrs);