void hqx_scale(gdImagePtr srcIm, int factor, gdImagePtr* result)
{
gdImagePtr dstIm;
uint32_t *srcBuffer, *dstBuffer;
size_t srcSize, dstSize;
uint32_t w, h;
uint32_t x, y;
w = gdImageSX(srcIm);
h = gdImageSY(srcIm);
srcSize = sizeof(uint32_t) * w * h;
dstSize = sizeof(uint32_t) * factor * w * factor * h;
// Unfortunately it doesn't work to simply pass the gd buffer from the
// gdImage struct to hqx, and the gd documentation explicitly says
// not to access member fields directly. Thus we allocate two buffers
// and copy the data back and forth as a workaround.
srcBuffer = (uint32_t*)emalloc(srcSize);
for (y = 0; y < h; y++) {
for (x = 0; x < w; x++) {
srcBuffer[w*y + x] = gdImageGetPixel(srcIm, x, y);
}
}
dstBuffer = (uint32_t*)emalloc(dstSize);
if (factor == 4) {
hq4x_32_rb(srcBuffer, sizeof(uint32_t)*w,
dstBuffer, sizeof(uint32_t)*factor*w,
w, h);
} else if (factor == 3) {
hq3x_32_rb(srcBuffer, sizeof(uint32_t)*w,
dstBuffer, sizeof(uint32_t)*factor*w,
w, h);
} else if (factor == 2) {
hq2x_32_rb(srcBuffer, sizeof(uint32_t)*w,
dstBuffer, sizeof(uint32_t)*factor*w,
w, h);
}
dstIm = gdImageCreateTrueColor(factor*w, factor*h);
gdImageAlphaBlending(dstIm, 0);
gdImageSaveAlpha(dstIm, 1);
for (y = 0; y < factor*h; y++) {
for (x = 0; x < factor*w; x++) {
gdImageSetPixel(dstIm, x, y, dstBuffer[factor*w*y + x]);
}
}
efree(srcBuffer);
efree(dstBuffer);
*result = dstIm;
}
/**
* Internal 8-bit Zoomer without smoothing.
* Source code originally from SDL_gfx (LGPL) with permission by author.
*
* Zooms 8bit palette/Y 'src' surface to 'dst' surface.
* Assumes src and dst surfaces are of 8-bit depth.
* Assumes dst surface was allocated with the correct dimensions.
*
* @param src The surface to zoom (input).
* @param dst The zoomed surface (output).
* @param flipx Flag indicating if the image should be horizontally flipped.
* @param flipy Flag indicating if the image should be vertically flipped.
* @return 0 for success or -1 for error.
*/
int Zoom::_zoomSurfaceY(SDL_Surface * src, SDL_Surface * dst, int flipx, int flipy)
{
int x, y;
static Uint32 *sax, *say;
Uint32 *csax, *csay;
int csx, csy;
Uint8 *sp, *dp, *csp;
int dgap;
static bool proclaimed = false;
if (Screen::is32bitEnabled())
{
if (Options::useXBRZFilter)
{
// check the resolution to see which scale we need
for (size_t factor = 2; factor <= 5; factor++)
{
if (dst->w == src->w * (int)factor && dst->h == src->h * (int)factor)
{
xbrz::scale(factor, (uint32_t*)src->pixels, (uint32_t*)dst->pixels, src->w, src->h, xbrz::RGB);
return 0;
}
}
}
if (Options::useHQXFilter)
{
static bool initDone = false;
if (!initDone)
{
hqxInit();
initDone = true;
}
// HQX_API void HQX_CALLCONV hq2x_32_rb( uint32_t * src, uint32_t src_rowBytes, uint32_t * dest, uint32_t dest_rowBytes, int width, int height );
if (dst->w == src->w * 2 && dst->h == src->h * 2)
{
hq2x_32_rb((uint32_t*)src->pixels, src->pitch, (uint32_t*)dst->pixels, dst->pitch, src->w, src->h);
return 0;
}
if (dst->w == src->w * 3 && dst->h == src->h * 3)
{
hq3x_32_rb((uint32_t*)src->pixels, src->pitch, (uint32_t*)dst->pixels, dst->pitch, src->w, src->h);
return 0;
}
if (dst->w == src->w * 4 && dst->h == src->h * 4)
{
hq4x_32_rb((uint32_t*)src->pixels, src->pitch, (uint32_t*)dst->pixels, dst->pitch, src->w, src->h);
return 0;
}
}
}
if (Options::useScaleFilter)
{
// check the resolution to see which of scale2x, scale3x, etc. we need
for (size_t factor = 2; factor <= 4; factor++)
{
if (dst->w == src->w * (int)factor && dst->h == src->h * (int)factor && !scale_precondition(factor, src->format->BytesPerPixel, src->w, src->h))
{
scale(factor, dst->pixels, dst->pitch, src->pixels, src->pitch, src->format->BytesPerPixel, src->w, src->h);
return 0;
}
}
}
// if we're scaling by a factor of 2 or 4, try to use a more efficient function
/*
if (src->format->BytesPerPixel == 1 && dst->format->BytesPerPixel == 1)
{
#ifdef __SSE2__
static bool _haveSSE2 = haveSSE2();
if (_haveSSE2 &&
!((ptrdiff_t)src->pixels % 16) &&
!((ptrdiff_t)dst->pixels % 16)) // alignment check
{
if (dst->w == src->w * 2 && dst->h == src->h * 2) return zoomSurface2X_SSE2(src, dst);
else if (dst->w == src->w * 4 && dst->h == src->h * 4) return zoomSurface4X_SSE2(src, dst);
} else
{
static bool complained = false;
if (!complained)
{
complained = true;
Log(LOG_ERROR) << "Misaligned surface buffers.";
}
}
#endif
// __WORDSIZE is defined on Linux, SIZE_MAX on Windows
#if defined(__WORDSIZE) && (__WORDSIZE == 64) || defined(SIZE_MAX) && (SIZE_MAX > 0xFFFFFFFF)
if (dst->w == src->w * 2 && dst->h == src->h * 2) return zoomSurface2X_64bit(src, dst);
else if (dst->w == src->w * 4 && dst->h == src->h * 4) return zoomSurface4X_64bit(src, dst);
#else
if (sizeof(void *) == 8)
{
if (dst->w == src->w * 2 && dst->h == src->h * 2) return zoomSurface2X_64bit(src, dst);
else if (dst->w == src->w * 4 && dst->h == src->h * 4) return zoomSurface4X_64bit(src, dst);
}
else
{
if (dst->w == src->w * 2 && dst->h == src->h * 2) return zoomSurface2X_32bit(src, dst);
else if (dst->w == src->w * 4 && dst->h == src->h * 4) return zoomSurface4X_32bit(src, dst);
}
#endif
// maybe X is scaled by 2 or 4 but not Y?
if (dst->w == src->w * 4) return zoomSurface4X_XAxis_32bit(src, dst);
else if (dst->w == src->w * 2) return zoomSurface2X_XAxis_32bit(src, dst);
}
*/
if (!proclaimed)
{
Log(LOG_INFO) << "Using software scaling routine. For best results, try an OpenGL filter.";
proclaimed = true;
}
/*
* Allocate memory for row increments
*/
if ((sax = (Uint32 *) realloc(sax, (dst->w + 1) * sizeof(Uint32))) == NULL) {
sax = 0;
return (-1);
}
if ((say = (Uint32 *) realloc(say, (dst->h + 1) * sizeof(Uint32))) == NULL) {
say = 0;
//free(sax);
return (-1);
}
/*
* Pointer setup
*/
sp = csp = (Uint8 *) src->pixels;
dp = (Uint8 *) dst->pixels;
dgap = dst->pitch - dst->w;
if (flipx) csp += (src->w-1);
if (flipy) csp = ( (Uint8*)csp + src->pitch*(src->h-1) );
/*
* Precalculate row increments
*/
csx = 0;
csax = sax;
for (x = 0; x < dst->w; x++) {
csx += src->w;
*csax = 0;
while (csx >= dst->w) {
csx -= dst->w;
(*csax)++;
}
(*csax) *= (flipx ? -1 : 1);
csax++;
}
csy = 0;
csay = say;
for (y = 0; y < dst->h; y++) {
csy += src->h;
*csay = 0;
while (csy >= dst->h) {
csy -= dst->h;
(*csay)++;
}
(*csay) *= src->pitch * (flipy ? -1 : 1);
csay++;
}
/*
* Draw
*/
csay = say;
for (y = 0; y < dst->h; y++) {
csax = sax;
sp = csp;
for (x = 0; x < dst->w; x++) {
/*
* Draw
*/
*dp = *sp;
/*
* Advance source pointers
*/
sp += (*csax);
csax++;
/*
* Advance destination pointer
*/
dp++;
}
/*
* Advance source pointer (for row)
*/
csp += (*csay);
csay++;
/*
* Advance destination pointers
*/
dp += dgap;
}
/*
* Never remove temp arrays
*/
//free(sax);
//free(say);
return 0;
}