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102 lines
2.6 KiB
C++
102 lines
2.6 KiB
C++
/*
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* Context.cpp
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*
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* Created on: 6 maj 2019
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* Author: robert
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*/
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#include <ios>
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#include <cstring>
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#include "BoundingBox.hpp"
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#include "Context.hpp"
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namespace gui {
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Context::Context( ) : x{0}, y{0}, w{0}, h{0}, data{nullptr} {
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}
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Context::Context( uint16_t width, uint16_t height, uint8_t* buffer ) : x{0}, y{0}, w{width}, h{height} {
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if( buffer == nullptr ){
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data = new uint8_t[w*h];
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}
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else {
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data = buffer;
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}
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memset( data, 15, w*h);
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}
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Context::~Context() {
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if( data != nullptr )
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delete [] data;
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}
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Context* Context::get( int16_t gx, int16_t gy, uint16_t width, uint16_t height ) {
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Context* retContext = new Context( width, height );
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retContext->x = x;
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retContext->y = y;
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//create bounding boxes for the current context and return context
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BoundingBox currentBox = BoundingBox( 0, 0, w, h );
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BoundingBox newBox = BoundingBox( gx, gy, width, height );
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BoundingBox resultBox;
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//if boxes overlap copy part defined by result from current context to the new context.
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if( BoundingBox::intersect( currentBox, newBox, resultBox ) ) {
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uint32_t sourceOffset = resultBox.y*w + resultBox.x;
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uint32_t destOffset = (resultBox.y - gy)*width + (resultBox.x-gx);
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for( int32_t h=0; h<resultBox.h; h++) {
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memcpy( retContext->data + destOffset, data + sourceOffset, resultBox.w );
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sourceOffset+=w;
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destOffset +=width;
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}
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}
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//else just return context filled with white colour.
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return retContext;
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}
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void Context::insert( int16_t ix, int16_t iy, Context* context ) {
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//create bounding boxes for the current context and return context
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BoundingBox currentBox = BoundingBox( 0, 0, w, h );
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BoundingBox insertBox = BoundingBox( ix, iy, context->w, context->h );
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BoundingBox resultBox;
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//if boxes overlap copy part defined by result from current context to the new context.
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if( BoundingBox::intersect( currentBox, insertBox, resultBox ) ) {
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uint32_t sourceOffset = (resultBox.y - iy)*context->w + (resultBox.x-ix);
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uint32_t destOffset = (resultBox.y)*w + (resultBox.x);
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for( int32_t h=0; h<resultBox.h; h++) {
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memcpy( data + destOffset, context->data + sourceOffset, resultBox.w );
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sourceOffset += context->w;
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destOffset += w;
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}
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}
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}
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void Context::fill( uint8_t colour ) {
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if( data ) {
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memset( data, colour, w*h );
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}
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}
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std::ostream & operator << (std::ostream &out, const Context &c)
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{
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out << "x:" << c.x << "y:" << c.y << "w:" << c.w <<"h:" << c.h <<std::endl;
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uint32_t offset = 0;
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for( uint32_t y = 0; y< c.h; y++ ) {
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for( uint32_t x=0; x<c.w;x++) {
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uint32_t value = *(c.data + offset);
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std::cout<<std::hex<<value;
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offset++;
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}
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std::cout<<std::endl;
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}
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return out;
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}
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} /* namespace gui */
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