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#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include "w32g_dib.h"
w32g_dib_t *dib_create (int width, int height )
{
BITMAPINFO bi;
w32g_dib_t *dib;
dib = (w32g_dib_t *) malloc ( sizeof (w32g_dib_t) );
if ( dib == NULL ) return NULL;
memset ( dib, 0, sizeof (w32g_dib_t) );
memset ( &bi, 0, sizeof (BITMAPINFO) );
bi.bmiHeader.biSize = sizeof (BITMAPINFOHEADER);
bi.bmiHeader.biWidth = width;
bi.bmiHeader.biHeight = -height;
bi.bmiHeader.biPlanes = 1;
bi.bmiHeader.biBitCount = 8;
bi.bmiHeader.biCompression = BI_RGB;
bi.bmiHeader.biSizeImage = 0;
bi.bmiHeader.biXPelsPerMeter= 0;
bi.bmiHeader.biYPelsPerMeter= 0;
bi.bmiHeader.biClrImportant = 0;
bi.bmiHeader.biClrUsed = 0;
dib->hbmp = CreateDIBSection ( NULL, &bi, DIB_RGB_COLORS, (void **)&dib->bits, NULL, 0);
dib->width = width;
dib->height = height;
dib->pals_max = 16;
dib->modified_rect_max = 0;
return dib;
}
void dib_free ( w32g_dib_t *dib )
{
if ( dib == NULL )
return;
GdiFlush ();
DeleteObject ( dib->hbmp );
free ( dib );
}
void dib_add_modified_rect ( w32g_dib_t *dib, RECT *lprc )
{
RECT rc;
int i;
for ( i = 0; i < dib->modified_rect_max; i ++ ) {
if ( dib->modified_rect[i].left <= lprc->left && lprc->right <= dib->modified_rect[i].right
&& dib->modified_rect[i].top <= lprc->top && lprc->bottom <= dib->modified_rect[i].bottom )
return;
}
if ( dib->modified_rect_max >= W32G_DIB_MODIFIED_RECT_MAX ) {
if ( UnionRect ( &rc, &dib->modified_rect[dib->modified_rect_max - 1], lprc ) )
memcpy ( &dib->modified_rect[dib->modified_rect_max - 1], &rc, sizeof (RECT) );
} else {
memcpy ( &dib->modified_rect[dib->modified_rect_max], lprc, sizeof (RECT) );
dib->modified_rect_max++;
}
}
void dib_modified_rect_whole ( w32g_dib_t *dib )
{
dib->modified_rect_max = 1;
SetRect ( &dib->modified_rect[0], 0, 0, dib->width, dib->height );
}
void dib_set_pal1 ( w32g_dib_t *dib, int pal_index, RGBQUAD rq )
{
HDC hmdc;
if ( pal_index >= dib->pals_max )
return;
if ( memcmp ( &dib->pals[pal_index], &rq, sizeof (RGBQUAD) ) == 0 )
return;
memcpy ( &dib->pals[pal_index], &rq, sizeof (RGBQUAD) );
GdiFlush ();
hmdc = CreateCompatibleDC ( (HDC)NULL );
SelectObject ( hmdc, dib->hbmp );
SetDIBColorTable ( hmdc, pal_index, 1, &dib->pals[pal_index] );
DeleteDC ( hmdc );
dib_modified_rect_whole ( dib );
}
void dib_set_pals ( w32g_dib_t *dib, RGBQUAD *pals, int pals_max )
{
int i;
BOOL modified = FALSE;
if ( pals_max <= 0 ) return;
if ( pals_max >= dib->pals_max )
pals_max = dib->pals_max;
for ( i = 0; i < pals_max; i ++ ) {
if ( memcmp ( &dib->pals[i], &pals[i], sizeof (RGBQUAD) ) != 0 ) {
memcpy ( &dib->pals[i], &pals[i], sizeof (RGBQUAD) );
modified = TRUE;
}
}
if ( modified ) {
HDC hmdc;
GdiFlush ();
hmdc = CreateCompatibleDC ( (HDC)NULL );
SelectObject ( hmdc, dib->hbmp );
SetDIBColorTable ( hmdc, 0, dib->pals_max, dib->pals );
DeleteDC ( hmdc );
dib_modified_rect_whole ( dib );
}
}
void dib_apply ( w32g_dib_t *dib, HDC hdc )
{
HDC hmdc;
int i;
if ( dib->modified_rect_max <= 0 ) return;
GdiFlush ();
hmdc = CreateCompatibleDC ( hdc );
SelectObject ( hmdc, dib->hbmp );
for ( i = 0; i < dib->modified_rect_max; i++ ) {
RECT *lprc = &dib->modified_rect[i];
BitBlt ( hdc, lprc->left, lprc->top, lprc->right - lprc->left, lprc->bottom - lprc->top,
hmdc, lprc->left, lprc->top, SRCCOPY );
}
dib->modified_rect_max = 0;
DeleteDC ( hmdc );
}
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