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(Softfilters) Prevent code duplication in scale2x.c

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This commit is contained in:
twinaphex 2014-04-15 21:18:43 +02:00
parent bbcac9463b
commit 6bb5a08f3e
1 changed files with 45 additions and 74 deletions
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119
gfx/filters/scale2x.c
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@ -20,48 +20,53 @@
#define SCALE2X_SCALE 2
#define SCALE2X_GENERIC(width, height, first, last, src, src_stride, dst, dst_stride) \
unsigned x, y; \
TYPENAME *out0 = (TYPENAME*)dst; \
TYPENAME *out1 = (TYPENAME*)(dst + dst_stride); \
\
for (y = 0; y < height; ++y) \
{ \
const int prevline = ((y == 0) && first) ? 0 : src_stride; \
const int nextline = ((y == height - 1) && last) ? 0 : src_stride; \
\
for (x = 0; x < width; ++x) \
{ \
const TYPENAME A = *(src - prevline); \
const TYPENAME B = (x > 0) ? *(src - 1) : *src; \
const TYPENAME C = *src; \
const TYPENAME D = (x < width - 1) ? *(src + 1) : *src; \
const TYPENAME E = *(src++ + nextline); \
\
if (A != E && B != D) \
{ \
*out0++ = (A == B ? A : C); \
*out0++ = (A == D ? A : C); \
*out1++ = (E == B ? E : C); \
*out1++ = (E == D ? E : C); \
} \
else \
{ \
*out0++ = C; \
*out0++ = C; \
*out1++ = C; \
*out1++ = C; \
} \
} \
\
src += src_stride - width; \
out0 += dst_stride + dst_stride - (width * SCALE2X_SCALE); \
out1 += dst_stride + dst_stride - (width * SCALE2X_SCALE); \
}
static void scale2x_generic_rgb565(unsigned width, unsigned height,
int first, int last,
const uint16_t *src, unsigned src_stride,
uint16_t *dst, unsigned dst_stride)
{
unsigned x, y;
uint16_t *out0 = (uint16_t*)dst;
uint16_t *out1 = (uint16_t*)(dst + dst_stride);
for (y = 0; y < height; ++y)
{
const int prevline = ((y == 0) && first) ? 0 : src_stride;
const int nextline = ((y == height - 1) && last) ? 0 : src_stride;
for (x = 0; x < width; ++x)
{
const uint16_t A = *(src - prevline);
const uint16_t B = (x > 0) ? *(src - 1) : *src;
const uint16_t C = *src;
const uint16_t D = (x < width - 1) ? *(src + 1) : *src;
const uint16_t E = *(src++ + nextline);
if (A != E && B != D)
{
*out0++ = (A == B ? A : C);
*out0++ = (A == D ? A : C);
*out1++ = (E == B ? E : C);
*out1++ = (E == D ? E : C);
}
else
{
*out0++ = C;
*out0++ = C;
*out1++ = C;
*out1++ = C;
}
}
src += src_stride - width;
out0 += dst_stride + dst_stride - (width * SCALE2X_SCALE);
out1 += dst_stride + dst_stride - (width * SCALE2X_SCALE);
}
#define TYPENAME uint16_t
SCALE2X_GENERIC(width, height, first, last, src, src_stride, dst, dst_stride);
#undef TYPENAME
}
static void scale2x_generic_xrgb8888(unsigned width, unsigned height,
@ -69,43 +74,9 @@ static void scale2x_generic_xrgb8888(unsigned width, unsigned height,
const uint32_t *src, unsigned src_stride,
uint32_t *dst, unsigned dst_stride)
{
unsigned x, y;
uint32_t *out0 = (uint32_t*)dst;
uint32_t *out1 = (uint32_t*)(dst + dst_stride);
for (y = 0; y < height; ++y)
{
const int prevline = ((y == 0) && first) ? 0 : src_stride;
const int nextline = ((y == height - 1) && last) ? 0 : src_stride;
for (x = 0; x < width; ++x)
{
const uint32_t A = *(src - prevline);
const uint32_t B = (x > 0) ? *(src - 1) : *src;
const uint32_t C = *src;
const uint32_t D = (x < width - 1) ? *(src + 1) : *src;
const uint32_t E = *(src++ + nextline);
if (A != E && B != D)
{
*out0++ = (A == B ? A : C);
*out0++ = (A == D ? A : C);
*out1++ = (E == B ? E : C);
*out1++ = (E == D ? E : C);
}
else
{
*out0++ = C;
*out0++ = C;
*out1++ = C;
*out1++ = C;
}
}
src += src_stride - width;
out0 += dst_stride + dst_stride - (width * SCALE2X_SCALE);
out1 += dst_stride + dst_stride - (width * SCALE2X_SCALE);
}
#define TYPENAME uint32_t
SCALE2X_GENERIC(width, height, first, last, src, src_stride, dst, dst_stride);
#undef TYPENAME
}
static unsigned scale2x_generic_input_fmts(void)