#include "Unit1.h"
#include <ddraw.h>
#include "Mercury.h"
extern LPDIRECTDRAW7 lpdd; //version 7.0 main
extern MercuryEngine GameEngine; //Main GameEngine
class BOB
{
public:
int x,y; //x-y coords
LPDIRECTDRAWSURFACE7 DDBOB; //DX BACK surface
RECT src_rect;
RECT dest_rect;
BOB();
};
BOB::BOB()
{
//int bob!
this->src_rect.left = 0;
this->src_rect.top = 0;
this->src_rect.right = 63;
this->src_rect.left = 63;
this->dest_rect.left = 100;
this->dest_rect.top = 100;
this->dest_rect.right = 100+63;
this->dest_rect.left = 100+64;
this->x = 100;
this->y = 100;
}
...
BOB bob;
...
if(FAILED(DDback->Blt(&dest_rect,DDback_sprite,&src_rect,DDBLT_WAIT, NULL)))
{
Application->MessageBoxA("Error","Boom",MB_OK);
Application->Terminate();
}
if(FAILED(DDback->Blt(&bob.src_rect,bob.DDBOB,&bob.dest_rect ,DDBLT_WAIT,NULL)))
{
Application->MessageBoxA("BOB don't like you!","Boom",MB_OK);
Application->Terminate();
}
Rather silly Blting question
Author
Right, I can blt a BMP to the backbuffer, and then flip. This works just fine, but when I add another surface, and try to blt one after another, it doesn't work. The blt fails. Now, I don't have colorkey. Is this going to be an issue? Here is my code:
if(FAILED(DDback->Blt(&bob.src_rect,bob.DDBOB,&bob.dest_rect ,DDBLT_WAIT,NULL)))In this, you have your source and destination rectangles mixed up.
what is the error returned from the HRESULT?
you have omitted the code that sets up the dd surface, so it is difficult to say what exactly is wrong...
you have omitted the code that sets up the dd surface, so it is difficult to say what exactly is wrong...
Author
Well I think that the DD surface set up is ok because my other bitmap is loaded, but here it is:
[Edited by - Coder on October 18, 2004 7:40:09 AM]
//Create Surface/////////////////////////////////////////////////////////////Creats any size surface//////////////////////////////////////////////////////////////////////////bool MercuryEngine::CreateSurface(LPDIRECTDRAWSURFACE7 *lpSource, int xs, int ys){ DDSURFACEDESC2 ddsd; ZeroMemory(&ddsd, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT; ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN ;//| DDSCAPS_VIDEOMEMORY; ddsd.dwWidth = xs; ddsd.dwHeight = ys; if(lpdd->CreateSurface(&ddsd, lpSource, NULL) != DD_OK) { return false; } else { return true; }}//-----------------------------------------------------------------------------// Name: DDLoadBitmap()// Desc: Create a DirectDrawSurface from a bitmap resource.//-----------------------------------------------------------------------------/*extern "C"*/ IDirectDrawSurface7 *MercuryEngine::DDLoadBitmap(IDirectDraw7 *pdd, LPCSTR szBitmap, int dx, int dy){ HBITMAP hbm; BITMAP bm; DDSURFACEDESC2 ddsd; IDirectDrawSurface7 *pdds; // // Try to load the bitmap as a resource, if that fails, try it as a file // hbm = (HBITMAP) LoadImage(GetModuleHandle(NULL), szBitmap, IMAGE_BITMAP, dx, dy, LR_CREATEDIBSECTION); if (hbm == NULL) hbm = (HBITMAP) LoadImage(NULL, szBitmap, IMAGE_BITMAP, dx, dy, LR_LOADFROMFILE | LR_CREATEDIBSECTION); if (hbm == NULL) return NULL; // // Get size of the bitmap // GetObject(hbm, sizeof(bm), &bm); // // Create a DirectDrawSurface for this bitmap // ZeroMemory(&ddsd, sizeof(ddsd)); ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_CAPS | DDSD_HEIGHT | DDSD_WIDTH; ddsd.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN; ddsd.dwWidth = bm.bmWidth; ddsd.dwHeight = bm.bmHeight; if (pdd->CreateSurface(&ddsd, &pdds, NULL) != DD_OK) return NULL; DDCopyBitmap(pdds, hbm, 0, 0, 0, 0); DeleteObject(hbm); return pdds;}//-----------------------------------------------------------------------------// Name: DDCopyBitmap()// Desc: Draw a bitmap into a DirectDrawSurface//-----------------------------------------------------------------------------/*extern "C" */HRESULTMercuryEngine::DDCopyBitmap(IDirectDrawSurface7 * pdds, HBITMAP hbm, int x, int y, int dx, int dy){ HDC hdcImage; HDC hdc; BITMAP bm; DDSURFACEDESC2 ddsd; HRESULT hr; if (hbm == NULL || pdds == NULL) return E_FAIL; // // Make sure this surface is restored. // pdds->Restore(); // // Select bitmap into a memoryDC so we can use it. // hdcImage = CreateCompatibleDC(NULL); if (!hdcImage) OutputDebugString("createcompatible dc failed\n"); SelectObject(hdcImage, hbm); // // Get size of the bitmap // GetObject(hbm, sizeof(bm), &bm); dx = dx == 0 ? bm.bmWidth : dx; // Use the passed size, unless zero dy = dy == 0 ? bm.bmHeight : dy; // // Get size of surface. // ddsd.dwSize = sizeof(ddsd); ddsd.dwFlags = DDSD_HEIGHT | DDSD_WIDTH; pdds->GetSurfaceDesc(&ddsd); if ((hr = pdds->GetDC(&hdc)) == DD_OK) { StretchBlt(hdc, 0, 0, ddsd.dwWidth, ddsd.dwHeight, hdcImage, x, y, dx, dy, SRCCOPY); pdds->ReleaseDC(hdc); } DeleteDC(hdcImage); return hr;}[Edited by - Coder on October 18, 2004 7:40:09 AM]
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