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#include "surface.h"
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Surface::Surface():
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m_width(), m_height(), m_pitch(), m_origin() { }
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Surface::Surface(const Surface &):
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m_width(), m_height(), m_pitch(), m_origin() { }
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void
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Surface::reset() {
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m_width = m_height = m_pitch = 0;
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m_origin = NULL;
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}
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void Surface::copy(int width, int height, const Color *src_origin, Color *dest_origin, int src_pitch, int dest_pitch) {
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#ifndef NDEBUG
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{ // check source and destination ranges
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assert(dest_origin);
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assert(src_origin);
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Color *dest_begin = dest_origin + begin_offset(width, height, dest_pitch),
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*dest_end = dest_origin + end_offset(width, height, dest_pitch);
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const Color *src_begin = src_origin + begin_offset(width, height, src_pitch),
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*src_end = src_origin + end_offset(width, height, src_pitch);
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assert(src_end <= dest_begin || dest_end <= src_begin);
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}
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#endif
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if (!src_pitch) src_pitch = width;
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if (!dest_pitch) dest_pitch = width;
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const Color *src_row = src_origin;
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for( Color *dest_row = dest_origin, *dest_row_end = dest_row + height*dest_pitch;
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dest_row != dest_row_end;
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dest_row += dest_pitch, src_row += src_pitch )
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{
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const Color *src_col = src_row;
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for( Color *dest_col = dest_row, *dest_col_end = dest_col + width;
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dest_col != dest_col_end;
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++dest_col, ++src_col )
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{ *dest_col = *src_col; }
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}
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}
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void DataSurface::clear() {
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if (Color *data = data_begin()) delete[] data;
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reset();
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}
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void DataSurface::init(int width, int height, int pitch, const Color *src_origin, int src_pitch) {
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Color *origin = NULL;
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if (width > 0 && height > 0) {
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if (!pitch) pitch = width;
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int count = data_count(width, height, pitch);
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int offset = begin_offset(width, height, pitch);
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Color *data = new Color[count];
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origin = data - offset;
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if (src_origin)
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copy(width, height, src_origin, origin, src_pitch, pitch);
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} else {
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width = 0;
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height = 0;
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pitch = 0;
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}
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clear();
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m_width = width;
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m_height = height;
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m_pitch = pitch;
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m_origin = origin;
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}
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void AliasSurface::init(Color *origin, int width, int height, int pitch) {
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clear();
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if (origin && width > 0 && height > 0) {
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m_width = width;
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m_height = height;
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m_pitch = pitch ? pitch : width;
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m_origin = origin;
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}
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}
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