Version 0.0.5 - added SVG Support0.0.5

1 files changed, 0 insertions, 149 deletions

diff --git a/libcore/imagescaler.c b/libcore/imagescaler.c
deleted file mode 100644
index 64fe3dc..0000000
--- a/libcore/imagescaler.c
+++ /dev/null
@@ -1,149 +0,0 @@
-
-#include "imagescaler.h"
-
-#include <cstdlib>
-#include <cmath>
-
-ImageScaler::ImageScaler() :
-    m_memory(NULL),
-    m_hor_filters(NULL),
-    m_ver_filters(NULL),
-    m_buffer(NULL),
-    m_dst_image(NULL),
-    m_dst_stride(0),
-    m_dst_width(0),
-    m_dst_height(0),
-    m_src_width(0),
-    m_src_height(0),
-    m_src_x(0),
-    m_src_y(0),
-    m_dst_x(0),
-    m_dst_y(0) {
-}
-
-ImageScaler::~ImageScaler() {
-    if ( m_memory ) free( m_memory );
-}
-
-// sin(x)/(x)
-static float sincf( float x ) {
-    if ( fabsf(x) < 0.05f ) return 1.0f - (1.0f/6.0f)*x*x;  // taylor series approximation to avoid 0/0
-    return sin(x)/x;
-}
-
-static void CalculateFilters( ImageScaler::Filter *filters, int dst_size, int src_size ) {
-    const float fc = dst_size >= src_size ? 1.0f : ((float) dst_size)/((float) src_size);
-
-    for (int i = 0; i < dst_size; i++) {
-        const int    d          = 2*dst_size;                     // sample position denominator
-        const int    e          = (2*i+1) * src_size - dst_size;  // sample position enumerator
-        int          offset     =  e / d;                         // truncated sample position
-        const float  sub_offset = ((float) (e - offset*d)) / ((float) d);  // exact sample position is (float) e/d = offset + sub_offset
-
-        // calculate filter coefficients
-        float  h[4];
-        for (int j=0; j<4; j++) {
-            const float t = 3.14159265359f * (sub_offset+(1-j));
-            h[j] = sincf( fc * t ) * cosf( 0.25f * t );             // sinc-lowpass and cos-window
-        }
-
-        // ensure that filter does not reach out off image bounds:
-        while ( offset < 1 ) {
-            h[0] += h[1];
-            h[1] = h[2];
-            h[2] = h[3];
-            h[3] = 0.0f;
-            offset++;
-        }
-
-        while ( offset+3 > src_size ) {
-            h[3] += h[2];
-            h[2] = h[1];
-            h[1] = h[0];
-            h[0] = 0.0f;
-            offset--;
-        }
-
-        // coefficients are normalized to sum up to 2048
-        const float  norm = 2048.0f / ( h[0] + h[1] + h[2] + h[3] );
-
-        offset--;  // offset of fist used pixel
-
-        filters[i].m_offset = offset + 4;  // store offset of first unused pixel
-
-        for (int j=0; j<4; j++) {
-            const float t = norm * h[j];
-            filters[i].m_coeff[(offset+j) & 3] = (int) ((t > 0.0f) ?  (t+0.5f) : (t-0.5f));  // consider ring buffer index permutations
-        }
-    }
-
-    // set end marker
-    filters[dst_size].m_offset = (unsigned) -1;
-
-}
-
-void ImageScaler::SetImageParameters( unsigned *dst_image, unsigned dst_stride, unsigned dst_width, unsigned dst_height, unsigned src_width, unsigned src_height ) {
-    m_src_x = 0;
-    m_src_y = 0;
-    m_dst_x = 0;
-    m_dst_y = 0;
-
-    m_dst_image  = dst_image;
-    m_dst_stride = dst_stride;
-
-    // if image dimensions do not change we can keep the old filter coefficients
-    if ( (src_width == m_src_width) && (src_height == m_src_height) && (dst_width == m_dst_width) && (dst_height == m_dst_height) ) return;
-
-    m_dst_width  = dst_width;
-    m_dst_height = dst_height;
-    m_src_width  = src_width;
-    m_src_height = src_height;
-
-    if ( m_memory ) free( m_memory );
-
-    const unsigned  hor_filters_size = (m_dst_width  + 1) * sizeof(Filter);  // reserve one extra position for end marker
-    const unsigned  ver_filters_size = (m_dst_height + 1) * sizeof(Filter);
-    const unsigned  buffer_size      = 4 * m_dst_width * sizeof(TmpPixel);
-
-    char *p = (char *) malloc( hor_filters_size + ver_filters_size + buffer_size );
-
-    m_memory = p;
-
-    m_hor_filters = (Filter   *) p;  p += hor_filters_size;
-    m_ver_filters = (Filter   *) p;  p += ver_filters_size;
-    m_buffer      = (TmpPixel *) p;
-
-    CalculateFilters( m_hor_filters, m_dst_width , m_src_width  );
-    CalculateFilters( m_ver_filters, m_dst_height, m_src_height );
-}
-
-// shift range to 0..255 and clamp overflows
-static unsigned shift_clamp( int x ) {
-    x = ( x + (1<<21) ) >> 22;
-    if ( x <   0 ) return   0;
-    if ( x > 255 ) return 255;
-    return x;
-}
-
-void ImageScaler::NextSourceLine() {
-    m_dst_x = 0;
-    m_src_x = 0;
-    m_src_y++;
-
-    while ( m_ver_filters[m_dst_y].m_offset == m_src_y ) {
-        const int        h0  = m_ver_filters[m_dst_y].m_coeff[0];
-        const int        h1  = m_ver_filters[m_dst_y].m_coeff[1];
-        const int        h2  = m_ver_filters[m_dst_y].m_coeff[2];
-        const int        h3  = m_ver_filters[m_dst_y].m_coeff[3];
-        const TmpPixel  *src = m_buffer;
-        unsigned        *dst = m_dst_image + m_dst_stride * m_dst_y;
-
-        for (unsigned i=0; i<m_dst_width; i++) {
-            const ImageScaler::TmpPixel t( src[0]*h0 + src[1]*h1 + src[2]*h2 + src[3]*h3 );
-            src += 4;
-            dst[i] = shift_clamp(t[0]) | (shift_clamp(t[1])<<8) | (shift_clamp(t[2])<<16) | (shift_clamp(t[3])<<24);
-        }
-
-        m_dst_y++;
-    }
-}