106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
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#include "cursors.hpp"
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#include <windows.h>
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#include <exception>
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#include <SFML/Graphics/RenderWindow.hpp>
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#include "res_cursor.hpp"
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extern sf::RenderWindow mainPtr;
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// This function adapted from <http://www.codeproject.com/Articles/5220/Creating-a-color-cursor-from-a-bitmap>
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static void GetMaskBitmaps(const sf::Image& srcImage, HBITMAP& hAndMaskBitmap, HBITMAP& hXorMaskBitmap) {
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HDC hDC = GetDC(NULL);
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HDC hMainDC = CreateCompatibleDC(hDC);
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HDC hAndMaskDC = CreateCompatibleDC(hDC);
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HDC hXorMaskDC = CreateCompatibleDC(hDC);
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hAndMaskBitmap = CreateCompatibleBitmap(hDC, srcImage.getSize().x, srcImage.getSize().y);
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hXorMaskBitmap = CreateCompatibleBitmap(hDC, srcImage.getSize().x, srcImage.getSize().y);
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// Select the bitmaps to DC
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HBITMAP hOldAndMaskBitmap = (HBITMAP)SelectObject(hAndMaskDC, hAndMaskBitmap);
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HBITMAP hOldXorMaskBitmap = (HBITMAP)SelectObject(hXorMaskDC, hXorMaskBitmap);
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// Scan each pixel of the source bitmap and create the masks
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sf::Color mainBitPixel;
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for(size_t x = 0; x < srcImage.getSize().x; ++x) {
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for(size_t y = 0; y < srcImage.getSize().y; ++y) {
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mainBitPixel = srcImage.getPixel(x, y);
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if(mainBitPixel.a == 0) {
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SetPixel(hAndMaskDC, x, y, RGB(255, 255, 255));
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SetPixel(hXorMaskDC, x, y, RGB(0, 0, 0));
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} else {
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SetPixel(hAndMaskDC, x, y, RGB(0, 0, 0));
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SetPixel(hXorMaskDC, x, y, RGB(mainBitPixel.r, mainBitPixel.g, mainBitPixel.b));
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}
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}
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}
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SelectObject(hAndMaskDC, hOldAndMaskBitmap);
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SelectObject(hXorMaskDC, hOldXorMaskBitmap);
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DeleteDC(hXorMaskDC);
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DeleteDC(hAndMaskDC);
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DeleteDC(hMainDC);
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ReleaseDC(NULL, hDC);
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}
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Cursor::Cursor(fs::path imgPath, float hotSpotX, float hotSpotY) {
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sf::Image gif;
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if(!gif.loadFromFile(imgPath.string())) {
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std::string error = "Error loading cursor from " + imgPath.string();
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throw error;
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}
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// Calculate the AND and XOR masks
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HBITMAP cursorAnd = CreateCompatibleBitmap(GetDC(NULL), gif.getSize().x, gif.getSize().y);
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HBITMAP cursorXor = CreateCompatibleBitmap(GetDC(NULL), gif.getSize().x, gif.getSize().y);
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GetMaskBitmaps(gif, cursorAnd, cursorXor);
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ICONINFO iconinfo = {0};
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iconinfo.fIcon = FALSE;
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iconinfo.xHotspot = hotSpotX;
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iconinfo.yHotspot = hotSpotY;
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iconinfo.hbmMask = cursorAnd;
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iconinfo.hbmColor = cursorXor;
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HCURSOR hCursor = CreateIconIndirect(&iconinfo);
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if(hCursor == NULL) {
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std::string error = "Error creating cursor from " + imgPath.string();
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error += " (error code " + std::to_string(GetLastError()) + ")";
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throw error;
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}
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ptr = hCursor;
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DeleteObject(cursorAnd);
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DeleteObject(cursorXor);
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}
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Cursor::~Cursor() {
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HCURSOR curs = (HCURSOR)ptr;
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DestroyIcon(curs);
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}
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void Cursor::apply() {
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HCURSOR curs = (HCURSOR)ptr;
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SetCursor(curs);
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}
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void obscureCursor() {
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SetCursor(NULL);
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}
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void set_cursor(cursor_type which_c) {
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if(which_c != watch_curs)
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Cursor::current = which_c;
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if(which_c == text_curs) {
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SetCursor(LoadCursor(NULL, IDC_IBEAM));
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} else {
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Cursor& curs = *ResMgr::cursors.get(cursors[which_c]);
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curs.apply();
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}
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}
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void restore_cursor() {
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set_cursor(Cursor::current);
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}
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