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Made bilinear interpolation function work, and edge conditions into structs with static functions rather than plain functions (in order to make bilinear interpolation work.)

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Originally committed to SVN as r1511.
This commit is contained in:
Niels Martin Hansen 2007-08-18 13:42:37 +00:00
parent 8e5e70cf8b
commit 17fbbaa583
2 changed files with 63 additions and 55 deletions
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94
OverLua/image.h
View file

@ -588,66 +588,74 @@ typedef BaseImageAggregateImpl<PixelFormat::ABGR> ImageABGR;
// Access pixels with various edge conditions
namespace EdgeCondition {
template<class PixFmt>
inline PixFmt &blackness(BaseImage<PixFmt> &img, int x, int y)
{
if (x < 0 || y < 0 || x >= img.width || x >= img.height) {
return PixFmt(); // all construct with all zeroes
} else {
struct Blackness {
static inline PixFmt &get(BaseImage<PixFmt> &img, int x, int y)
{
if (x < 0 || y < 0 || x >= img.width || x >= img.height) {
return PixFmt(); // all construct with all zeroes
} else {
return img.Pixel(x,y);
}
}
};
template<class PixFmt>
struct Closest {
static inline PixFmt &get(BaseImage<PixFmt> &img, int x, int y)
{
if (x < 0) x = 0;
if (y < 0) y = 0;
if (x >= img.width) x = img.width-1;
if (y >= img.height) y = img.height - 1;
return img.Pixel(x,y);
}
}
};
template<class PixFmt>
inline PixFmt &closest(BaseImage<PixFmt> &img, int x, int y)
{
if (x < 0) x = 0;
if (y < 0) y = 0;
if (x >= img.width) x = img.width-1;
if (y >= img.height) y = img.height - 1;
return img.Pixel(x,y);
}
struct Repeat {
static inline PixFmt &get(BaseImage<PixFmt> &img, int x, int y)
{
while (x < 0) x += img.width;
while (y < 0) y += img.height;
while (x >= img.width) x -= img.width;
while (y >= img.height) y -= img.height;
return img.Pixel(x,y);
}
};
template<class PixFmt>
inline PixFmt &repeat(BaseImage<PixFmt> &img, int x, int y)
{
while (x < 0) x += img.width;
while (y < 0) y += img.height;
while (x >= img.width) x -= img.width;
while (y >= img.height) y -= img.height;
return img.Pixel(x,y);
}
template<class PixFmt>
inline PixFmt &mirror(BaseImage<PixFmt> &img, int x, int y)
{
while (x < 0) x += img.width*2;
while (y < 0) y += img.height*2;
while (x >= img.width*2) x -= img.width*2;
while (y >= img.height*2) y -= img.height*2;
if (x >= img.width) x = img.width - x;
if (y >= img.height) y = img.height - y;
return img.Pixel(x,y);
}
struct Mirror {
static inline PixFmt &get(BaseImage<PixFmt> &img, int x, int y)
{
while (x < 0) x += img.width*2;
while (y < 0) y += img.height*2;
while (x >= img.width*2) x -= img.width*2;
while (y >= img.height*2) y -= img.height*2;
if (x >= img.width) x = img.width - x;
if (y >= img.height) y = img.height - y;
return img.Pixel(x,y);
}
};
}
// FIXME: this is completely broken, the compiler won't accept it
// when instantiated with one of the EdgeCondition functions for EdgeCond
template<class PixFmt, class EdgeCond>
template<class PixFmt, typename EdgeCond>
inline PixFmt GetPixelBilinear(BaseImage<PixFmt> &img, double x, double y)
{
PixFmt res;
double xpct = x - floor(x), ypct = y - floor(y);
const PixFmt &src11 = EdgeCond(img, (int)x, (int)y);
const PixFmt &src12 = EdgeCond(img, (int)x, 1+(int)y);
const PixFmt &src21 = EdgeCond(img, 1+(int)x, (int)y);
const PixFmt &src22 = EdgeCond(img, 1+(int)x, 1+(int)y);
const PixFmt &src11 = EdgeCond::get(img, (int)x, (int)y);
const PixFmt &src12 = EdgeCond::get(img, (int)x, 1+(int)y);
const PixFmt &src21 = EdgeCond::get(img, 1+(int)x, (int)y);
const PixFmt &src22 = EdgeCond::get(img, 1+(int)x, 1+(int)y);
res.R() += (1-xpct) * (1-ypct) * src11.R() + (1-xpct) * ypct * src12.R() + xpct * (1-ypct) * src21.R() + xpct * ypct * src22.R();
res.G() += (1-xpct) * (1-ypct) * src11.G() + (1-xpct) * ypct * src12.G() + xpct * (1-ypct) * src21.G() + xpct * ypct * src22.G();
res.B() += (1-xpct) * (1-ypct) * src11.B() + (1-xpct) * ypct * src12.B() + xpct * (1-ypct) * src21.B() + xpct * ypct * src22.B();
res.A() += (1-xpct) * (1-ypct) * src11.A() + (1-xpct) * ypct * src12.A() + xpct * (1-ypct) * src21.A() + xpct * ypct * src22.A();
res.R() = (1-xpct) * (1-ypct) * src11.R() + (1-xpct) * ypct * src12.R() + xpct * (1-ypct) * src21.R() + xpct * ypct * src22.R();
res.G() = (1-xpct) * (1-ypct) * src11.G() + (1-xpct) * ypct * src12.G() + xpct * (1-ypct) * src21.G() + xpct * ypct * src22.G();
res.B() = (1-xpct) * (1-ypct) * src11.B() + (1-xpct) * ypct * src12.B() + xpct * (1-ypct) * src21.B() + xpct * ypct * src22.B();
res.A() = (1-xpct) * (1-ypct) * src11.A() + (1-xpct) * ypct * src12.A() + xpct * (1-ypct) * src21.A() + xpct * ypct * src22.A();
return res;
}

24
OverLua/raster_ops.cpp
View file

@ -429,8 +429,8 @@ struct DirectionalBlurFilter {
{
int a = 0;
for (int t = -gk.width/2, i = 0; i < gk.width; t++, i++) {
//PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::A8 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::Repeat<PixelFormat::A8> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::A8 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
a += srcpx.A() * gk.kernel[i];
}
PixelFormat::A8 res;
@ -442,8 +442,8 @@ struct DirectionalBlurFilter {
{
int r = 0, g = 0, b = 0;
for (int t = -gk.width/2, i = 0; i < gk.width; t++, i++) {
//PixelFormat::cairo_rgb24 &srcpx = GetPixelBilinear<PixelFormat::cairo_rgb24, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::cairo_rgb24 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::cairo_rgb24 &srcpx = GetPixelBilinear<PixelFormat::cairo_rgb24, EdgeCondition::Repeat<PixelFormat::cairo_rgb24> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::cairo_rgb24 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
r += srcpx.R() * gk.kernel[i];
g += srcpx.G() * gk.kernel[i];
b += srcpx.B() * gk.kernel[i];
@ -461,8 +461,8 @@ struct DirectionalBlurFilter {
{
int a = 0, r = 0, g = 0, b = 0;
for (int t = -gk.width/2, i = 0; i < gk.width; t++, i++) {
//PixelFormat::cairo_argb32 &srcpx = GetPixelBilinear<PixelFormat::cairo_argb32, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::cairo_argb32 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::cairo_argb32 &srcpx = GetPixelBilinear<PixelFormat::cairo_argb32, EdgeCondition::Repeat<PixelFormat::cairo_argb32> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::cairo_argb32 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
a += srcpx.A() * gk.kernel[i];
r += srcpx.R() * gk.kernel[i];
g += srcpx.G() * gk.kernel[i];
@ -510,8 +510,8 @@ struct RadialBlurFilter {
int divisor = 0;
int a = 0;
for (int t = 0, i = gk.width/2; i < gk.width; t++, i++) {
//PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::A8 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::Repeat<PixelFormat::A8> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::A8 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
a += srcpx.A() * gk.kernel[i];
divisor += gk.kernel[i];
}
@ -528,8 +528,8 @@ struct RadialBlurFilter {
int divisor = 0;
int r = 0, g = 0, b = 0;
for (int t = 0, i = gk.width/2; i < gk.width; t++, i++) {
//PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::cairo_rgb24 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::cairo_rgb24 &srcpx = GetPixelBilinear<PixelFormat::cairo_rgb24, EdgeCondition::Repeat<PixelFormat::cairo_rgb24> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::cairo_rgb24 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
r += srcpx.R() * gk.kernel[i];
g += srcpx.G() * gk.kernel[i];
b += srcpx.B() * gk.kernel[i];
@ -552,8 +552,8 @@ struct RadialBlurFilter {
int divisor = 0;
int a = 0, r = 0, g = 0, b = 0;
for (int t = 0, i = gk.width/2; i < gk.width; t++, i++) {
//PixelFormat::A8 &srcpx = GetPixelBilinear<PixelFormat::A8, EdgeCondition::repeat>(src, x+xstep*t, y+ystep*t);
PixelFormat::cairo_argb32 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
PixelFormat::cairo_argb32 &srcpx = GetPixelBilinear<PixelFormat::cairo_argb32, EdgeCondition::Repeat<PixelFormat::cairo_argb32> >(src, x+xstep*t, y+ystep*t);
//PixelFormat::cairo_argb32 &srcpx = EdgeCondition::repeat(src, (int)(x+xstep*t), (int)(y+ystep*t));
a += srcpx.A() * gk.kernel[i];
r += srcpx.R() * gk.kernel[i];
g += srcpx.G() * gk.kernel[i];