[PATCH 4/5] gdiplus: Implement BMP encoding.
Nathan Beckmann
nathan.beckmann at gmail.com
Mon Mar 10 10:16:56 CDT 2008
Implement the encoding function for GDI+ images so that
GdipSaveImageToStream can encode images as BMP files.
---
dlls/gdiplus/image.c | 46 +++++++++++++++++++++++++++++++++++++++++++-
dlls/gdiplus/tests/image.c | 6 +---
2 files changed, 47 insertions(+), 5 deletions(-)
diff --git a/dlls/gdiplus/image.c b/dlls/gdiplus/image.c
index 2699418..32cc0b7 100644
--- a/dlls/gdiplus/image.c
+++ b/dlls/gdiplus/image.c
@@ -838,10 +838,54 @@ GpStatus WINGDIPAPI GdipSaveImageToFile(GpImage *image, GDIPCONST WCHAR* filenam
* Encoding functions -
* These functions encode an image in different image file formats.
*/
+#define BITMAP_FORMAT_BMP 0x4d42 /* "BM" */
+#define BITMAP_FORMAT_JPEG 0xd8ff
+#define BITMAP_FORMAT_GIF 0x4947
+#define BITMAP_FORMAT_PNG 0x5089
+#define BITMAP_FORMAT_APM 0xcdd7
+
static GpStatus encode_image_BMP(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
void **output, unsigned int *output_size)
{
- return NotImplemented;
+ int num_palette_entries;
+ BITMAPFILEHEADER *bmp_file_hdr;
+ BITMAPINFO *bmp_info_hdr;
+
+ if (bitmap_info->bmiHeader.biClrUsed) {
+ num_palette_entries = bitmap_info->bmiHeader.biClrUsed;
+ if (num_palette_entries > 256) num_palette_entries = 256;
+ } else {
+ if (bitmap_info->bmiHeader.biBitCount <= 8)
+ num_palette_entries = 1 << bitmap_info->bmiHeader.biBitCount;
+ else
+ num_palette_entries = 0;
+ }
+
+ *output_size =
+ sizeof(BITMAPFILEHEADER) +
+ sizeof(BITMAPINFOHEADER) +
+ num_palette_entries * sizeof(RGBQUAD) +
+ bitmap_info->bmiHeader.biSizeImage;
+
+ *output = GdipAlloc(*output_size);
+
+ bmp_file_hdr = (BITMAPFILEHEADER*) *output;
+ bmp_file_hdr->bfType = BITMAP_FORMAT_BMP;
+ bmp_file_hdr->bfSize = *output_size;
+ bmp_file_hdr->bfOffBits =
+ sizeof(BITMAPFILEHEADER) +
+ sizeof(BITMAPINFOHEADER) +
+ num_palette_entries * sizeof (RGBQUAD);
+
+ bmp_info_hdr = (BITMAPINFO*) ((unsigned char*)(*output) + sizeof(BITMAPFILEHEADER));
+ memcpy(bmp_info_hdr, bitmap_info, sizeof(BITMAPINFOHEADER) + num_palette_entries * sizeof(RGBQUAD));
+ memcpy((unsigned char *)(*output) +
+ sizeof(BITMAPFILEHEADER) +
+ sizeof(BITMAPINFOHEADER) +
+ num_palette_entries * sizeof(RGBQUAD),
+ bitmap_bits, bitmap_info->bmiHeader.biSizeImage);
+
+ return Ok;
}
typedef GpStatus encode_image_func(LPVOID bitmap_bits, LPBITMAPINFO bitmap_info,
diff --git a/dlls/gdiplus/tests/image.c b/dlls/gdiplus/tests/image.c
index d51636b..d0a8c6e 100644
--- a/dlls/gdiplus/tests/image.c
+++ b/dlls/gdiplus/tests/image.c
@@ -159,10 +159,8 @@ static void test_SavingImages(void)
stat = GdipGetImageEncoders(n, s, codecs);
if (stat != Ok) goto cleanup;
- todo_wine {
- stat = GdipSaveImageToFile((GpImage*)bm, filename, &codecs[0].Clsid, 0);
- expect(stat, Ok);
- }
+ stat = GdipSaveImageToFile((GpImage*)bm, filename, &codecs[0].Clsid, 0);
+ expect(stat, Ok);
cleanup:
if (codecs)
--
1.5.4.2
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