(from <Someone>)
The pet image was garbled because it was reduced to the size of the pet mark bitmap in the function that draws pet mark transparently over the pet tile (32x32 image was reduced to 16x16 and then stretched again) Also added: use Windows-provided TransparentBlt where available.
This commit is contained in:
nethack.allison
@@ -882,84 +882,107 @@ COLORREF nhcolor_to_RGB(int c)
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/* apply bitmap pointed by sourceDc transparently over
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bitmap pointed by hDC */
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typedef BOOL (WINAPI* LPTRANSPARENTBLT)(HDC, int, int, int, int, HDC, int, int, int, int, UINT);
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void nhapply_image_transparent(
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HDC hDC, int x, int y, int width, int height,
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HDC sourceDC, int s_x, int s_y, int s_width, int s_height,
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COLORREF cTransparent
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)
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{
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HDC hdcMem, hdcBack, hdcObject, hdcSave;
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COLORREF cColor;
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HBITMAP bmAndBack, bmAndObject, bmAndMem, bmSave;
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HBITMAP bmBackOld, bmObjectOld, bmMemOld, bmSaveOld;
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static BOOL MSIInit = FALSE;
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static HMODULE hMSIModule = NULL;
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static LPTRANSPARENTBLT pTransparentBlt = NULL;
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/* Create some DCs to hold temporary data. */
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hdcBack = CreateCompatibleDC(hDC);
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hdcObject = CreateCompatibleDC(hDC);
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hdcMem = CreateCompatibleDC(hDC);
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hdcSave = CreateCompatibleDC(hDC);
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if( !MSIInit ) {
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MSIInit = TRUE;
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hMSIModule = LoadLibrary(_T("Msimg32.dll"));
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if (hMSIModule) {
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pTransparentBlt = (LPTRANSPARENTBLT) GetProcAddress(hMSIModule, "TransparentBlt");
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}
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}
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/* this is bitmap for our pet image */
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bmSave = CreateCompatibleBitmap(hDC, s_width, s_height);
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if ( pTransparentBlt )
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{
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(*pTransparentBlt)(
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hDC, x, y, width, height,
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sourceDC, s_x, s_y, s_width, s_height,
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cTransparent
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);
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} else {
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HDC hdcMem, hdcBack, hdcObject, hdcSave;
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COLORREF cColor;
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HBITMAP bmAndBack, bmAndObject, bmAndMem, bmSave;
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HBITMAP bmBackOld, bmObjectOld, bmMemOld, bmSaveOld;
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/* Monochrome DC */
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bmAndBack = CreateBitmap(s_width, s_height, 1, 1, NULL);
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bmAndObject = CreateBitmap(s_width, s_height, 1, 1, NULL);
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/* Create some DCs to hold temporary data. */
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hdcBack = CreateCompatibleDC(hDC);
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hdcObject = CreateCompatibleDC(hDC);
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hdcMem = CreateCompatibleDC(hDC);
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hdcSave = CreateCompatibleDC(hDC);
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/* resulting bitmap */
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bmAndMem = CreateCompatibleBitmap(hDC, s_width, s_height);
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/* this is bitmap for our pet image */
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bmSave = CreateCompatibleBitmap(hDC, width, height);
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/* Each DC must select a bitmap object to store pixel data. */
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bmBackOld = SelectObject(hdcBack, bmAndBack);
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bmObjectOld = SelectObject(hdcObject, bmAndObject);
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bmMemOld = SelectObject(hdcMem, bmAndMem);
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bmSaveOld = SelectObject(hdcSave, bmSave);
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/* Monochrome DC */
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bmAndBack = CreateBitmap(width, height, 1, 1, NULL);
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bmAndObject = CreateBitmap(width, height, 1, 1, NULL);
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/* copy source image because it is going to be overwritten */
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BitBlt(hdcSave, 0, 0, s_width, s_height, sourceDC, s_x, s_y, SRCCOPY);
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/* resulting bitmap */
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bmAndMem = CreateCompatibleBitmap(hDC, width, height);
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/* Set the background color of the source DC to the color.
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contained in the parts of the bitmap that should be transparent */
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cColor = SetBkColor(hdcSave, cTransparent);
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/* Each DC must select a bitmap object to store pixel data. */
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bmBackOld = SelectObject(hdcBack, bmAndBack);
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bmObjectOld = SelectObject(hdcObject, bmAndObject);
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bmMemOld = SelectObject(hdcMem, bmAndMem);
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bmSaveOld = SelectObject(hdcSave, bmSave);
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/* Create the object mask for the bitmap by performing a BitBlt
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from the source bitmap to a monochrome bitmap. */
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BitBlt(hdcObject, 0, 0, s_width, s_height, hdcSave, 0, 0, SRCCOPY);
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/* copy source image because it is going to be overwritten */
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StretchBlt(hdcSave, 0, 0, width, height, sourceDC, s_x, s_y, s_width, s_height, SRCCOPY);
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/* Set the background color of the source DC back to the original
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color. */
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SetBkColor(hdcSave, cColor);
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/* Set the background color of the source DC to the color.
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contained in the parts of the bitmap that should be transparent */
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cColor = SetBkColor(hdcSave, cTransparent);
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/* Create the inverse of the object mask. */
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BitBlt(hdcBack, 0, 0, s_width, s_height, hdcObject, 0, 0, NOTSRCCOPY);
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/* Create the object mask for the bitmap by performing a BitBlt
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from the source bitmap to a monochrome bitmap. */
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BitBlt(hdcObject, 0, 0, width, height, hdcSave, 0, 0, SRCCOPY);
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/* Copy background to the resulting image */
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StretchBlt(hdcMem, 0, 0, s_width, s_height, hDC, x, y, width, height, SRCCOPY);
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/* Set the background color of the source DC back to the original
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color. */
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SetBkColor(hdcSave, cColor);
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/* Mask out the places where the source image will be placed. */
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BitBlt(hdcMem, 0, 0, s_width, s_height, hdcObject, 0, 0, SRCAND);
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/* Create the inverse of the object mask. */
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BitBlt(hdcBack, 0, 0, width, height, hdcObject, 0, 0, NOTSRCCOPY);
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/* Mask out the transparent colored pixels on the source image. */
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BitBlt(hdcSave, 0, 0, s_width, s_height, hdcBack, 0, 0, SRCAND);
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/* Copy background to the resulting image */
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BitBlt(hdcMem, 0, 0, width, height, hDC, x, y, SRCCOPY);
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/* XOR the source image with the beckground. */
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BitBlt(hdcMem, 0, 0, s_width, s_height, hdcSave, 0, 0, SRCPAINT);
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/* Mask out the places where the source image will be placed. */
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BitBlt(hdcMem, 0, 0, width, height, hdcObject, 0, 0, SRCAND);
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/* blt resulting image to the screen */
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StretchBlt(
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hDC,
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x, y, width, height, hdcMem,
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0, 0, s_width, s_height, SRCCOPY
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);
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/* Mask out the transparent colored pixels on the source image. */
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BitBlt(hdcSave, 0, 0, width, height, hdcBack, 0, 0, SRCAND);
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/* cleanup */
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DeleteObject(SelectObject(hdcBack, bmBackOld));
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DeleteObject(SelectObject(hdcObject, bmObjectOld));
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DeleteObject(SelectObject(hdcMem, bmMemOld));
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DeleteObject(SelectObject(hdcSave, bmSaveOld));
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/* XOR the source image with the beckground. */
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BitBlt(hdcMem, 0, 0, width, height, hdcSave, 0, 0, SRCPAINT);
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DeleteDC(hdcMem);
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DeleteDC(hdcBack);
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DeleteDC(hdcObject);
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DeleteDC(hdcSave);
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/* blt resulting image to the screen */
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BitBlt(
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hDC,
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x, y, width, height, hdcMem,
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0, 0, SRCCOPY
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);
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/* cleanup */
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DeleteObject(SelectObject(hdcBack, bmBackOld));
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DeleteObject(SelectObject(hdcObject, bmObjectOld));
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DeleteObject(SelectObject(hdcMem, bmMemOld));
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DeleteObject(SelectObject(hdcSave, bmSaveOld));
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DeleteDC(hdcMem);
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DeleteDC(hdcBack);
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DeleteDC(hdcObject);
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DeleteDC(hdcSave);
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}
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}
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