bullet3-framework/Framework2dCanvasInterface.cpp at master · marcel303/bullet3-framework · GitHub

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#include "Debugging.h"
#include "Framework2dCanvasInterface.h"
#include <map>

Framework2dCanvasInterface::~Framework2dCanvasInterface()
{
}

int Framework2dCanvasInterface::createCanvas(const char* canvasName, int width, int height, int xPos, int yPos)
{
	const int id = m_nextCanvasId++;
	Assert(m_canvases[id] == nullptr);

	auto *& canvas = m_canvases[id];
	canvas = new Framework2dCanvas();
	canvas->pixels = new uint8_t[width * height * 4];
	canvas->sx = width;
	canvas->sy = height;
	canvas->texture.allocate(width, height, GX_RGBA8_UNORM);

	return id;
}

void Framework2dCanvasInterface::destroyCanvas(int canvasId)
{
	auto i = m_canvases.find(canvasId);
	Assert(i != m_canvases.end());
	if (i != m_canvases.end())
	{
		auto *& canvas = i->second;

		delete canvas;
		canvas = nullptr;

		m_canvases.erase(i);
	}
}

void Framework2dCanvasInterface::setPixel(int canvasId, int x, int y, unsigned char red, unsigned char green, unsigned char blue, unsigned char alpha)
{
	auto i = m_canvases.find(canvasId);
	Assert(i != m_canvases.end());
	if (i != m_canvases.end())
	{
		auto * canvas = i->second;

		if (x >= 0 && x < canvas->sx &&
			y >= 0 && y < canvas->sy)
		{
			auto * line = canvas->getLine(y);

			line[x * 4 + 0] = red;
			line[x * 4 + 1] = green;
			line[x * 4 + 2] = blue;
			line[x * 4 + 3] = alpha;
		}
	}
}

void Framework2dCanvasInterface::getPixel(int canvasId, int x, int y, unsigned char& red, unsigned char& green, unsigned char& blue, unsigned char& alpha)
{
	auto i = m_canvases.find(canvasId);
	Assert(i != m_canvases.end());
	if (i != m_canvases.end())
	{
		auto * canvas = i->second;

		if (x >= 0 && x < canvas->sx &&
			y >= 0 && y < canvas->sy)
		{
			auto * line = canvas->getLine(y);

			red   = line[x * 4 + 0];
			green = line[x * 4 + 1];
			blue  = line[x * 4 + 2];
			alpha = line[x * 4 + 3];

			return;
		}
	}

	red = green = blue = alpha = 0xff;
}

void Framework2dCanvasInterface::refreshImageData(int canvasId)
{
	auto i = m_canvases.find(canvasId);
	Assert(i != m_canvases.end());
	if (i != m_canvases.end())
	{
		auto * canvas = i->second;

		canvas->texture.upload(canvas->pixels, 4, 0);
	}
}