[Windows Mobile 2003] CreateDIBSection et rotation d'un bmp

D'abord je mexcuse au pret des admins je suis pas du tout sur d'etre au bon endroit, mais comme les gens d'ici font de l'image...

Alors voilà mon probleme, j'aimerai faire une copie de bitmap en memoie pour afficher :
Un qui n'est pas touché
Un qui est simplement tourné d'un angle X

Une copie simple peut ce faire comme ça (elle marche)

Code:

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HBITMAP CopyBitmap( HBITMAP hbm) { HDC hdcSrc = CreateCompatibleDC(NULL); HDC hdcDst = CreateCompatibleDC(NULL); HBITMAP hbmOld, hbmOld2, hbmNew; BITMAP bm; GetObject(hbm, sizeof(bm), &bm); hbmOld = SelectObject(hdcSrc, hbm); hbmNew = CreateBitmap( bm.bmWidth, bm.bmHeight, bm.bmPlanes, bm.bmBitsPixel, NULL); hbmOld2 = SelectObject(hdcDst, hbmNew); BitBlt(hdcDst, 0, 0, bm.bmWidth, bm.bmHeight, hdcSrc, 0, 0, SRCCOPY); SelectObject(hdcSrc, hbmOld); DeleteDC(hdcSrc); DeleteDC(hdcDst); return hbmNew; }

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le truc c'est que ce code me donne pas un acces "correcte" aux valeurs de pixels de l'image, alors pour avoir le controle total des pixels je fais une copie plus compliquée avec CreateDIBSection

Code:

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HBITMAP CRotate::SimpleCopie(HDC hDC, HBITMAP hSourceBitmap) { /* HDC hdcSrc = CreateCompatibleDC(NULL); HDC hdcDst = CreateCompatibleDC(NULL); HBITMAP hbmOld, hbmOld2, hbmNew; BITMAP bm; GetObject(hSourceBitmap, sizeof(bm), &bm); hbmOld = (HBITMAP) SelectObject(hdcSrc, hSourceBitmap); hbmNew = CreateBitmap( bm.bmWidth, bm.bmHeight, bm.bmPlanes, bm.bmBitsPixel,NULL); hbmOld2 = (HBITMAP) SelectObject(hdcDst, hbmNew); BitBlt(hdcDst, 0, 0, bm.bmWidth, bm.bmHeight, hdcSrc, 0, 0, SRCCOPY); SelectObject(hdcSrc, hbmOld); DeleteDC(hdcSrc); DeleteDC(hdcDst); return hbmNew; */ //2. Getting bimap size. BITMAP bm; GetObject(hSourceBitmap, sizeof(BITMAP), &bm); //3. Creating new bitmap and receive pointer to it's bits. HBITMAP hTargetBitmap; void *pBuffer; //3.1 Initilize DIBINFO structure BITMAPINFO bi = {0}; bi.bmiHeader.biBitCount = 32; bi.bmiHeader.biClrImportant = 0; bi.bmiHeader.biClrUsed = 0; bi.bmiHeader.biCompression = 0; bi.bmiHeader.biHeight = bm.bmHeight; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);; bi.bmiHeader.biSizeImage = bm.bmWidth*bm.bmHeight*3; bi.bmiHeader.biWidth = bm.bmWidth; bi.bmiHeader.biXPelsPerMeter = 3780; bi.bmiHeader.biYPelsPerMeter = 3780; bi.bmiColors[0].rgbBlue = 0; bi.bmiColors[0].rgbGreen = 0; bi.bmiColors[0].rgbRed = 0; bi.bmiColors[0].rgbReserved = 0; //3.2 Create bitmap and receive pointer to points into pBuffer hTargetBitmap = CreateDIBSection( hDC, &bi, DIB_RGB_COLORS, (void**)&pBuffer, NULL, 0); //4. Copy source bitmap into the target bitmap. //4.1 Create 2 device contexts HDC memDc = CreateCompatibleDC(NULL); HDC targetDc = CreateCompatibleDC(NULL); //4.2 Select source bitmap into one DC, target into another HBITMAP hOldBitmap1 = (HBITMAP)::SelectObject(memDc, hSourceBitmap); HBITMAP hOldBitmap2 = (HBITMAP)::SelectObject(targetDc, hTargetBitmap); //4.3 Copy source bitmap into the target one BitBlt(memDc,0, 0, bm.bmWidth, bm.bmHeight, memDc, 0, 0, SRCCOPY); //4.4 Restore device contexts ::SelectObject(memDc, hOldBitmap1); ::SelectObject(targetDc, hOldBitmap2); DeleteDC(memDc); DeleteDC(targetDc); //Here we can bitmap bits: pBuffer. Note: // 1. pBuffer contains 3 bytes per point // 2. Lines ane from the bottom to the top! // 3. Points in the line are from the left to the right // 4. Bytes in one point are BGR (blue, green, red) not RGB // 5. Don't delete pBuffer, it will be automatically deleted // when delete hTargetBitmap //DeleteObject(hSourceBitmap); //DeleteObject(hTargetBitmap); return hTargetBitmap; }

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Mais voilà si le bitmap retourné à bien la bonne taille, il est tout noir !! (pixels = 0 je suppose) donc ma question est la suivante,
Ba pourquoi ???

Alors je sais que l'on est directx ici mais mois je suis avec des API windows de base pas de MFC, c'est une simple copie que je cherche a faire (pas de truc complexes non plus je develloppe sur un telephone portable !) et non il ne connait pas GetDIBits :(

Loupé, il existe un forum "Développement Windows" tout à fait approprié pour ça.

Sujet déplacé.

j'ai pas tout lu ton post mais déjà regarde ce lien, ça peut peut-être t'aider :

http://www.codeguru.com/Cpp/G-M/bitm...cle.php/c1747/
et celui la:
http://www.codeguru.com/Cpp/G-M/bitm...cle.php/c1743/

Humm a vu de nez ça devrai coller je ragrde ça merci ;)

Et bien en fait les liens sont tres bien mais pas du tout adaptés pour mon telephoen portable !! il manque les les fonctions de recup des pixels :(

Alors pour faire un essai je copie un bitmap avec la fonction createBitmap :

Code:

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HBITMAP CRotate::CopyBitmap( HBITMAP hbm) { BITMAP bm = {0}; GetObject(hbm, sizeof(bm), &bm); hbmOld = (HBITMAP) SelectObject(hdcSrc, hbm); hbmNew = (HBITMAP) CreateBitmap( bm.bmWidth, bm.bmHeight, bm.bmPlanes, bm.bmBitsPixel,bm.bmBits); return hbmNew; }

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Et j'obtien un truc tres bizard...
Mon image resultat ressemble à une fractale 8O alors que au depart c'est un chat avec une mouche sur le nez :?
Ce qui me parait pas top c'est que MSDN dit :

Citation:

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Envoyé par MSDN

typedef struct tagBITMAP {
LONG bmType;
LONG bmWidth;
LONG bmHeight;
LONG bmWidthBytes;
WORD bmPlanes;
WORD bmBitsPixel;
LPVOID bmBits;
} BITMAP;

bmBits
Pointer to the location of the bit values for the bitmap. The bmBits member must be a long pointer to an array of character (1-byte) values.

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ALors avec GetObject on devrait pouvoir chopper ces %µ£¨¤+@ de pixels non :cry: pour moi il semble que non...

Quelqu'un a t'il une idée ???

moi j'utiliserai plutot GetBitmapBits ou GetDIBBits

Et bien moi aussi j'utiliserias ces fonctions, mais ya un hic...
Le hic c'et Windows Mobile 2003, il ne connasi pas ces functions, alors d'apres tes liens j'ai adapté le creatDIB ça donnne ça :

Code:

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HBITMAP CRotate::CopieSimple(HDC hDC, HBITMAP hSourceBitmap) { //2. Getting bimap size. BITMAP bm; GetObject(hSourceBitmap, sizeof(BITMAP), &bm); //3. Creating new bitmap and receive pointer to it's bits. HBITMAP hTargetBitmap; void *pBuffer; //3.1 Initilize BITMAPINFO structure BITMAPINFO bi = {0}; bi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 32; bi.bmiHeader.biWidth = bm.bmWidth; bi.bmiHeader.biHeight = bm.bmHeight; bi.bmiHeader.biCompression = BI_RGB; //3.2 Create bitmap and receive pointer to points into pBuffer hTargetBitmap = CreateDIBSection( hDC, &bi, DIB_RGB_COLORS, (void**)&pBuffer, NULL, 0); //4. Copy source bitmap into the target bitmap. //4.1 Create 2 device contexts HDC memDc = CreateCompatibleDC(NULL); HDC targetDc = CreateCompatibleDC(NULL); //4.2 Select source bitmap into one DC, target into another HBITMAP hOldBitmap1 = (HBITMAP)::SelectObject(memDc, hSourceBitmap); HBITMAP hOldBitmap2 = (HBITMAP)::SelectObject(targetDc, hTargetBitmap); //4.3 Copy source bitmap into the target one BitBlt(targetDc,0, 0, bm.bmWidth, bm.bmHeight, memDc, 0, 0, SRCCOPY); //4.4 Restore device contexts ::SelectObject(memDc, hOldBitmap1); ::SelectObject(targetDc, hOldBitmap2); DeleteDC(memDc); DeleteDC(targetDc); //Here we can bitmap bits: pBuffer. Note: // 1. pBuffer contains 3 bytes per point // 2. Lines ane from the bottom to the top! // 3. Points in the line are from the left to the right // 4. Bytes in one point are BGR (blue, green, red) not RGB // 5. Don't delete pBuffer, it will be automatically deleted // when delete hTargetBitmap //DeleteObject(hSourceBitmap); //DeleteObject(hTargetBitmap); return hTargetBitmap; }

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Comme les couleurs et les pixels sont rangés bizarrement je ferme pas le post et je mettrais le code de rotation quand il sera fait...

Au passage c'est pas comme dans mon premier post

Citation:

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Envoyé par chronos

BitBlt(memDc,0, 0, bm.bmWidth, bm.bmHeight, memDc, 0, 0, SRCCOPY);

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mais

Code:

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BitBlt(targetDc,0, 0, bm.bmWidth, bm.bmHeight, memDc, 0, 0, SRCCOPY);

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Quand on est pas môlin...

Merci pour les liens ;)

Et bien voilà c'est fait :D pour mes petits enfants je laisse une trace de comment que c'est ti qu'il faut faire sous mobile 2003 pour tourner une image :

1 - On charge L'image :

Code:

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1 2	HBITMAP hbm = SHLoadImageFile(TEXT("\\Storage\\Windows\\Start Menu\\Accessories\\a.jpg"));

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2 - On fait tourner l'image :

Code:

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HBITMAP TurnIt&#40;HDC hDC, HBITMAP hSourceBitmap,int nAngle&#41; &#123; if&#40;nAngle != 0 && nAngle != 90 && nAngle != 180 && nAngle != 270&#41; return NULL; //1. Creating new bitmap and receive pointer to it's bits. HBITMAP hTargetBitmap; void * lpDataSrc; BITMAP bm; if&#40;GetObject&#40;hSourceBitmap, sizeof&#40;BITMAP&#41;, &bm&#41; == 0&#41; &#123; return NULL; &#125; //1.1 Initilize BITMAPINFO structure BITMAPINFO bi = &#123;0&#125;; bi.bmiHeader.biSize = sizeof&#40;BITMAPINFOHEADER&#41;; bi.bmiHeader.biPlanes = 1; bi.bmiHeader.biBitCount = 32; bi.bmiHeader.biWidth = bm.bmWidth; bi.bmiHeader.biHeight = bm.bmHeight; bi.bmiHeader.biCompression = BI_RGB; //1.2 Create bitmap and receive pointer to points into pBuffer hTargetBitmap = CreateDIBSection&#40;hDC,&bi,DIB_RGB_COLORS,&#40;void**&#41;&lpDataSrc,NULL,0&#41;; if&#40;hTargetBitmap == NULL&#41; &#123; return NULL; &#125; //2. Copy source bitmap into the target bitmap. //2.1 Create 2 device contexts HDC memDc = CreateCompatibleDC&#40;NULL&#41;; HDC targetDc = CreateCompatibleDC&#40;NULL&#41;; if&#40;memDc == NULL || targetDc == NULL&#41; &#123; DeleteObject&#40;hTargetBitmap&#41;; return NULL; &#125; //2.2 Select source bitmap into one DC, target into another HBITMAP hOldBitmap1 = &#40;HBITMAP&#41;&#58;&#58;SelectObject&#40;memDc, hSourceBitmap&#41;; HBITMAP hOldBitmap2 = &#40;HBITMAP&#41;&#58;&#58;SelectObject&#40;targetDc, hTargetBitmap&#41;; if&#40;hOldBitmap1 == NULL || hOldBitmap2 == NULL&#41; &#123; DeleteObject&#40;hTargetBitmap&#41;; DeleteDC&#40;memDc&#41;; DeleteDC&#40;targetDc&#41;; return NULL; &#125; //2.3 Copy source bitmap into the target one if &#40;BitBlt&#40;targetDc,0, 0, bm.bmWidth, bm.bmHeight, memDc, 0, 0, SRCCOPY&#41; == 0&#41; &#123; DeleteObject&#40;hTargetBitmap&#41;; DeleteDC&#40;memDc&#41;; DeleteDC&#40;targetDc&#41;; return NULL; &#125; //2.4 Restore device contexts &#58;&#58;SelectObject&#40;memDc, hOldBitmap1&#41;; &#58;&#58;SelectObject&#40;targetDc, hOldBitmap2&#41;; //2.5 Destroy device context DeleteDC&#40;memDc&#41;; DeleteDC&#40;targetDc&#41;; //Here we can bitmap bits&#58; pBuffer. // Note&#58; // 1. pBuffer contains 3 bytes per point // 2. Lines ane from the bottom to the top! // 3. Points in the line are from the left to the right // 4. Bytes in one point are BGR &#40;blue, green, red&#41; not RGB // 5. Don't delete lpDataSrc, it will be automatically deleted // when delete hTargetBitmap //3. Rotate the bitmap //3.1 Get source size SIZE sizeSrc = &#123;0&#125;; sizeSrc.cx = bm.bmWidth; sizeSrc.cy = bm.bmHeight; //3.2 Compute dest size, hard calculation &#58;op SIZE sizeDst = sizeSrc; if&#40;nAngle == 90 || nAngle == 270&#41; &#123; sizeDst.cx = sizeSrc.cy; sizeDst.cy = sizeSrc.cx; &#125; //3.3 Allocate memory for our new bitmap DWORD dwSize = 4*sizeDst.cx*sizeDst.cy; LPVOID lpDataDst = VirtualAlloc&#40;NULL, dwSize, MEM_COMMIT, PAGE_READWRITE&#41;; if&#40;lpDataDst == NULL&#41; &#123; DeleteObject&#40;hTargetBitmap&#41;; return NULL; &#125; //3.4 Get pixels and turn them for&#40;int xSrc = 0; xSrc < sizeSrc.cx; xSrc++&#41; &#123; for&#40;int ySrc = 0; ySrc < sizeSrc.cy; ySrc++&#41; &#123; // Dest pixels coordinates int xDst = 0; int yDst = 0; //compute dest coordinates //WARNING &#58; //After BitBlt w've got pixels bottum up //And for CreateBitmap bitmap pixels are top down //Must invert y coordinates switch&#40;nAngle&#41; &#123; case 90 &#58; xDst = sizeSrc.cy-ySrc-1;//compute x dest coordinate yDst = &#40;sizeSrc.cx-1&#41; - xSrc;//xSrc should be goog but we need ton invert y break; case 180&#58; xDst = xSrc; yDst = ySrc; break; case 270&#58; xDst = ySrc; yDst = xSrc; break; &#125; //Compute the pixel addresse //Assuming they are in a one dim array LPDWORD lpSrc = &#40;LPDWORD&#41;lpDataSrc+ sizeSrc.cx*ySrc + xSrc; LPDWORD lpDst = &#40;LPDWORD&#41;lpDataDst+ sizeDst.cx*yDst + xDst; //Sets the dest pixel *lpDst = *lpSrc; &#125; &#125; //4. Create the new bitmap hTargetBitmap = CreateBitmap&#40;sizeDst.cx,sizeDst.cy,1,32/*Bit by pixels*/,lpDataDst/*pixel array*/&#41;; if &#40;hTargetBitmap == NULL&#41; &#123; DeleteObject&#40;hTargetBitmap&#41;; VirtualFree&#40;lpDataDst, 0, MEM_RELEASE&#41;; return NULL; &#125; //5. Cleanup VirtualFree&#40;lpDataDst, 0, MEM_RELEASE&#41;; return hTargetBitmap; &#125;

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Voilà c'est fini ;)