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bitmap.c
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bitmap.c
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/*
* bitmap.c
*
* Copyright (c) 2003 Alexandre Pigolkine
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software
* and associated documentation files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
* NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
* OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Authors:
* Alexandre Pigolkine(pigolkine@gmx.de)
*/
#include <glib.h>
#include "gdip.h"
#include "gdip_win32.h"
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
void
gdip_bitmap_init (GpBitmap *bitmap)
{
gdip_image_init (&bitmap->image);
bitmap->image.type = imageBitmap;
bitmap->cairo_format = 0;
bitmap->data.Width = 0;
bitmap->data.Height = 0;
bitmap->data.Stride = 0;
bitmap->data.PixelFormat = 0;
bitmap->data.Scan0 = 0;
bitmap->data.Reserved = 0;
bitmap->hBitmapDC = 0;
bitmap->hInitialBitmap = 0;
bitmap->hBitmap = 0;
}
GpBitmap *
gdip_bitmap_new ()
{
GpBitmap *result = (GpBitmap *) GdipAlloc (sizeof(GpBitmap));
gdip_bitmap_init (result);
return result;
}
/*
* This should only be called from GdipDisposeImage, and it should *not* free
* the structure, that one is freed by GdipDisposeImage
*/
void
gdip_bitmap_dispose (GpBitmap *bitmap)
{
if (bitmap->data.own_scan0 == TRUE)
GdipFree (bitmap->data.Scan0);
}
void
gdip_bitmap_fill_info_header (GpBitmap *bitmap, PBITMAPINFOHEADER bmi)
{
int bitmapLen = bitmap->data.Stride * bitmap->data.Height;
memset (bmi, 0, 40);
bmi->biSize = sizeof (BITMAPINFOHEADER);
bmi->biWidth = bitmap->data.Width;
bmi->biHeight = -bitmap->data.Height;
bmi->biPlanes = 1;
bmi->biBitCount = 32;
bmi->biCompression = BI_RGB;
bmi->biSizeImage = bitmapLen;
}
void
gdip_bitmap_save_bmp (const char *name, GpBitmap *bitmap)
{
BITMAPFILEHEADER bmfh;
BITMAPINFOHEADER bmi;
int bitmapLen = bitmap->data.Stride * bitmap->data.Height;
FILE *fp;
bmfh.bfReserved1 = bmfh.bfReserved2 = 0;
bmfh.bfType = BFT_BITMAP;
bmfh.bfOffBits = (14 + 40 + 0 * 4);
bmfh.bfSize = (bmfh.bfOffBits + bitmapLen);
fp = fopen (name, "w+b");
fwrite (&bmfh, 1, sizeof (bmfh), fp);
gdip_bitmap_fill_info_header (bitmap, &bmi);
bmi.biHeight = -bmi.biHeight;
fwrite (&bmi, 1, sizeof (bmi), fp);
fwrite (bitmap->data.Scan0, 1, bitmapLen, fp);
fclose (fp);
}
void *
gdip_bitmap_create_Win32_HDC (GpBitmap *bitmap)
{
void * result = 0;
void * hdc = CreateCompatibleDC_pfn (0);
void * hbitmap = 0, * holdbitmap = 0;
void * hdcDesc = GetDC_pfn (0);
hbitmap = CreateCompatibleBitmap_pfn (hdcDesc, bitmap->data.Width, bitmap->data.Height);
if (hbitmap != 0) {
BITMAPINFO bmi;
gdip_bitmap_fill_info_header (bitmap, &bmi.bmiHeader);
/* _saveBmp ("file1.bmp", bitmap); */
SetDIBits_pfn (hdc, hbitmap, 0, bitmap->data.Height, bitmap->data.Scan0, &bmi, 0);
holdbitmap = SelectObject_pfn (hdc, hbitmap);
bitmap->hBitmapDC = hdc;
bitmap->hInitialBitmap = holdbitmap;
bitmap->hBitmap = hbitmap;
result = hdc;
}
else {
DeleteDC_pfn (hdc);
}
ReleaseDC_pfn (0, hdcDesc);
return result;
}
void
gdip_bitmap_destroy_Win32_HDC (GpBitmap *bitmap, void *hdc)
{
if (bitmap->hBitmapDC == hdc) {
BITMAPINFO bmi;
int res = 0;
unsigned long *array, *end;
SelectObject_pfn (bitmap->hBitmapDC, bitmap->hInitialBitmap);
gdip_bitmap_fill_info_header (bitmap, &bmi.bmiHeader);
res = GetDIBits_pfn (bitmap->hBitmapDC, bitmap->hBitmap, 0, bitmap->data.Height, bitmap->data.Scan0, &bmi, 0);
if (bitmap->cairo_format == CAIRO_FORMAT_ARGB32) {
array = bitmap->data.Scan0;
end = array + (bmi.bmiHeader.biSizeImage >> 2);
while (array < end) {
*array |= 0xff000000;
++array;
}
}
/* _saveBmp ("file2.bmp", bitmap); */
DeleteObject_pfn (bitmap->hBitmap);
DeleteDC_pfn (bitmap->hBitmapDC);
bitmap->hBitmapDC = 0;
bitmap->hInitialBitmap = 0;
bitmap->hBitmap = 0;
}
}
GpStatus
GdipCreateBitmapFromScan0 (int width, int height, int stride, int format, void *scan0, GpBitmap **bitmap)
{
GpBitmap *result = 0;
int cairo_format = 0;
bool own_scan0 = FALSE;
if (stride == 0)
return InvalidParameter;
switch (format) {
case Format24bppRgb:
cairo_format = CAIRO_FORMAT_RGB24;
break;
case Format32bppArgb:
cairo_format = CAIRO_FORMAT_ARGB32;
break;
default:
*bitmap = 0;
return NotImplemented;
}
if (scan0 == NULL) {
scan0 = GdipAlloc (stride * height);
own_scan0 = TRUE;
}
result = gdip_bitmap_new ();
result->cairo_format = cairo_format;
result->data.Width = width;
result->data.Height = height;
result->data.Stride = stride;
result->data.PixelFormat = format;
result->data.Scan0 = scan0;
result->data.own_scan0 = own_scan0;
*bitmap = result;
return Ok;
}
GpStatus
GdipCreateBitmapFromGraphics (int width, int height, GpGraphics *graphics, GpBitmap **bitmap)
{
GpBitmap *result = 0;
int bmpSize = 0;
int cairo_format = 0;
int stride = width;
/*
* FIXME: should get the stride based on the format of the graphics object.
*/
fprintf (stderr, "GdipCreateBitmapFromGraphics: This routine has not been checked for stride size\n");
while (stride % 4)
stride++;
stride *= 4;
cairo_format = CAIRO_FORMAT_ARGB32;
bmpSize = stride * height;
result = gdip_bitmap_new ();
result->cairo_format = cairo_format;
result->data.Width = width;
result->data.Height = height;
result->data.Stride = stride;
result->data.PixelFormat = Format32bppArgb;
result->data.Scan0 = GdipAlloc (bmpSize);
result->data.Reserved = 1;
*bitmap = result;
return Ok;
}
GpStatus
GdipCloneBitmapAreaI (int x, int y, int width, int height, int format, GpBitmap *original, GpBitmap **bitmap)
{
GpBitmap *result = 0;
int bmpSize = original->data.Height * original->data.Stride;
/*
* FIXME: Convert format if needed and copy only specified rectangle
*/
result = gdip_bitmap_new ();
result->cairo_format = original->cairo_format;
result->data.Width = original->data.Width;
result->data.Height = original->data.Height;
result->data.Stride = original->data.Stride;
result->data.PixelFormat = original->data.PixelFormat;
result->data.Scan0 = GdipAlloc (bmpSize);
memmove (result->data.Scan0, original->data.Scan0, bmpSize);
result->data.Reserved = 1;
*bitmap = result;
return Ok;
}
static int
ChangePixelFormat (GpBitmap *bitmap, GdipBitmapData *destData)
{
int sourcePixelIncrement = (bitmap->data.PixelFormat == Format32bppArgb) ? 1 : 0;
int destinationPixelIncrement = (destData->PixelFormat == Format32bppArgb) ? 1 : 0;
char * curSrc = bitmap->data.Scan0;
char * curDst = 0;
int i, j;
/*
printf("ChangePixelFormat to %d. Src inc %d, Dest Inc %d\n",
destData->PixelFormat, sourcePixelIncrement, destinationPixelIncrement);
*/
if (bitmap->data.PixelFormat == destData->PixelFormat) return 0;
if (destData->PixelFormat != Format32bppArgb && destData->PixelFormat != Format24bppRgb) {
fprintf (stderr, "This pixel format is not supported %d\n", destData->PixelFormat);
return 0;
}
destData->Width = bitmap->data.Width;
destData->Height = bitmap->data.Height;
destData->Stride = ((destData->PixelFormat == Format32bppArgb ) ? 4 : 3 ) * bitmap->data.Width;
destData->Scan0 = GdipAlloc (destData->Stride * bitmap->data.Height);
destData->Reserved = 1;
curSrc = bitmap->data.Scan0;
curDst = (char *)destData->Scan0;
for ( i = 0; i < bitmap->data.Height; i++) {
for( j = 0; j < bitmap->data.Width; j++) {
*curDst++ = *curSrc++;
*curDst++ = *curSrc++;
*curDst++ = *curSrc++;
curSrc += sourcePixelIncrement;
curDst += destinationPixelIncrement;
}
}
return 1;
}
GpStatus
GdipBitmapLockBits (GpBitmap *bitmap, Rect *rc, int flags, int format, GdipBitmapData *result)
{
if (bitmap == 0){
printf ("Bitmap is null\n");
return InvalidParameter;
}
/* Special case: the entire image is requested */
if (rc->left == 0 && rc->right == bitmap->data.Width &&
rc->top == 0 && rc->bottom == bitmap->data.Height &&
format == bitmap->data.PixelFormat){
*result = bitmap->data;
result->Reserved = result->Reserved & ~1;
return Ok;
}
if (bitmap->data.PixelFormat != format) {
GdipBitmapData convert;
convert.PixelFormat = format;
if (!ChangePixelFormat (bitmap, &convert)) {
printf ("Requesting format change, not supported yet %d %d\n", bitmap->data.PixelFormat, format);
return InvalidParameter;
}
result->Width = convert.Width;
result->Height = convert.Height;
result->Stride = convert.Stride;
result->PixelFormat = convert.PixelFormat;
result->Reserved = convert.Reserved;
result->Scan0 = convert.Scan0;
}
else {
result->Width = bitmap->data.Width;
result->Height = bitmap->data.Height;
result->Stride = bitmap->data.Stride;
result->PixelFormat = bitmap->data.PixelFormat;
result->Reserved = bitmap->data.Reserved;
result->Scan0 = bitmap->data.Scan0;
}
return Ok;
}
GpStatus
____BitmapLockBits (GpBitmap *bitmap, Rect *rc, int flags, int format, int *width, int *height, int *stride, int *fptr, int *res, int *scan0)
{
GdipBitmapData d;
int s;
s = GdipBitmapLockBits (bitmap, rc, flags, format, &d);
*width = d.Width;
*height = d.Height;
*stride = d.Stride;
*fptr = d.PixelFormat;
*res = d.Reserved;
*scan0 = (int)d.Scan0;
return s;
}
GpStatus
GdipBitmapUnlockBits (GpBitmap *bitmap, GdipBitmapData *bitmap_data)
{
if (bitmap_data->Reserved & 1)
GdipFree (bitmap_data->Scan0);
return Ok;
}