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Extract bitmap class

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sfan5 2025-06-20 12:57:28 +02:00
parent f2eb5e7a93
commit e835673c5e
2 changed files with 95 additions and 44 deletions
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46
src/client/imagefilters.cpp
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@ -4,54 +4,12 @@
#include "imagefilters.h"
#include "util/numeric.h"
#include "util/bitmap.h"
#include <cmath>
#include <cassert>
#include <vector>
#include <algorithm>
#include <IVideoDriver.h>
// Simple 2D bitmap class with just the functionality needed here
class Bitmap {
u32 linesize, lines;
std::vector<u8> data;
static inline u32 bytepos(u32 index) { return index >> 3; }
static inline u8 bitpos(u32 index) { return index & 7; }
public:
Bitmap(u32 width, u32 height) : linesize(width), lines(height),
data(bytepos(width * height) + 1) {}
inline bool get(u32 x, u32 y) const {
u32 index = y * linesize + x;
return data[bytepos(index)] & (1 << bitpos(index));
}
inline void set(u32 x, u32 y) {
u32 index = y * linesize + x;
data[bytepos(index)] |= 1 << bitpos(index);
}
inline bool all() const {
for (u32 i = 0; i < data.size() - 1; i++) {
if (data[i] != 0xff)
return false;
}
// last byte not entirely filled
for (u8 i = 0; i < bitpos(linesize * lines); i++) {
bool value_of_bit = data.back() & (1 << i);
if (!value_of_bit)
return false;
}
return true;
}
inline void copy(Bitmap &to) const {
assert(to.linesize == linesize && to.lines == lines);
to.data = data;
}
};
template <bool IS_A8R8G8B8>
static void imageCleanTransparentWithInlining(video::IImage *src, u32 threshold)
{
@ -143,7 +101,7 @@ static void imageCleanTransparentWithInlining(video::IImage *src, u32 threshold)
// Apply changes to bitmap for next run. This is done so we don't introduce
// a bias in color propagation in the direction pixels are processed.
newmap.copy(bitmap);
bitmap = newmap;
}
}