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implement LoadBitmapEx2

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This commit is contained in:
Vincent Wei
2020-01-09 12:16:46 +08:00
parent a359534236
commit 902a7c56f5
1 changed files with 40 additions and 24 deletions
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src/newgdi/readbmp.c
+40 -24
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@@ -201,9 +201,14 @@ inline static BOOL device_has_alpha(HDC hdc)
return FALSE;
}
#define ALLOC_BUFF_NONE 0
#define ALLOC_BUFF_LINE 1
#define ALLOC_BUFF_ALL 1
#define ALLOC_ALL (alloc_method == ALLOC_BUFF_ALL)
/* Initializes a bitmap object with a mybitmap object */
static int init_bitmap_from_mybmp (HDC hdc, PBITMAP bmp,
const MYBITMAP* my_bmp, RGB* pal, BOOL alloc_all)
const MYBITMAP* my_bmp, RGB* pal, int alloc_method)
{
int ret = ERR_BMP_OK;
unsigned int size;
@@ -214,19 +219,20 @@ static int init_bitmap_from_mybmp (HDC hdc, PBITMAP bmp,
bmp->bmBitsPerPixel = pdc->surface->format->BitsPerPixel;
bmp->bmBytesPerPixel = pdc->surface->format->BytesPerPixel;
bmp->bmWidth = my_bmp->w;
bmp->bmHeight = my_bmp->h;
bmp->bmBits = NULL;
bmp->bmAlphaMask = NULL;
bmp->bmAlphaPitch = 0;
size = GAL_GetBoxSize (pdc->surface, my_bmp->w, my_bmp->h, &bmp->bmPitch);
if (!(bmp->bmBits = malloc (alloc_all?size:bmp->bmPitch))) {
ret = ERR_BMP_MEM;
goto cleanup_and_ret;
if (alloc_method) {
if (!(bmp->bmBits = malloc (ALLOC_ALL?size:bmp->bmPitch))) {
ret = ERR_BMP_MEM;
goto cleanup_and_ret;
}
}
bmp->bmWidth = my_bmp->w;
bmp->bmHeight = my_bmp->h;
bmp->bmType = BMP_TYPE_NORMAL;
if (my_bmp->flags & MYBMP_TRANSPARENT) {
RGB trans;
@@ -265,21 +271,20 @@ static int init_bitmap_from_mybmp (HDC hdc, PBITMAP bmp,
if (my_bmp->flags & MYBMP_ALPHA && my_bmp->depth == 32) {
bmp->bmType |= BMP_TYPE_ALPHA;
if (!device_has_alpha(hdc)) {
if (!device_has_alpha (hdc)) {
bmp->bmType |= BMP_TYPE_ALPHA_MASK;
alpha_pitch = (bmp->bmWidth + 3) & (~3);
if (alloc_all) {
size = bmp->bmHeight * alpha_pitch;
} else {
size = alpha_pitch;
}
bmp->bmAlphaMask = calloc(1, size);
bmp->bmAlphaPitch = alpha_pitch;
if (bmp->bmAlphaMask == NULL) {
ret = ERR_BMP_MEM;
goto cleanup_and_ret;
if (alloc_method) {
size = alpha_pitch;
if (ALLOC_ALL) size *= bmp->bmHeight;
bmp->bmAlphaMask = calloc (1, size);
if (bmp->bmAlphaMask == NULL) {
ret = ERR_BMP_MEM;
goto cleanup_and_ret;
}
}
}
}
@@ -377,7 +382,7 @@ int GUIAPI ExpandMyBitmap (HDC hdc, PBITMAP bmp, const MYBITMAP* my_bmp,
memcpy (new_pal, pal, sizeof (RGB) * nr_colors);
}
ret = init_bitmap_from_mybmp (hdc, bmp, my_bmp, new_pal, TRUE);
ret = init_bitmap_from_mybmp (hdc, bmp, my_bmp, new_pal, ALLOC_BUFF_ALL);
if (ret) return ret;
pal = new_pal;
@@ -493,7 +498,9 @@ static void cb_load_bitmap_sl (void* context, MYBITMAP* my_bmp, int y)
}
}
int GUIAPI LoadBitmapEx (HDC hdc, PBITMAP bmp, MG_RWops* area, const char* ext)
int GUIAPI LoadBitmapEx2 (HDC hdc, PBITMAP bmp,
MG_RWops* area, const char* ext,
CB_ALLOC_BITMAP_BUFF cb_alloc_buff, void* context)
{
MYBITMAP my_bmp;
RGB pal [256];
@@ -510,7 +517,16 @@ int GUIAPI LoadBitmapEx (HDC hdc, PBITMAP bmp, MG_RWops* area, const char* ext)
return ERR_BMP_IMAGE_TYPE;
}
ret = init_bitmap_from_mybmp (hdc, bmp, &my_bmp, pal, TRUE);
if (cb_alloc_buff) {
ret = init_bitmap_from_mybmp (hdc, bmp, &my_bmp, pal, ALLOC_BUFF_ALL);
}
else {
/* if use ALLOC_BUFF_NONE, it always returns ERR_BMP_OK */
ret = init_bitmap_from_mybmp (hdc, bmp, &my_bmp, pal, ALLOC_BUFF_NONE);
if (!cb_alloc_buff (context, bmp))
ret = ERR_BMP_MEM;
}
if (ret) {
CleanupMyBitmapSL (&my_bmp, load_info);
return ret;
@@ -654,7 +670,7 @@ int GUIAPI PaintImageEx (HDC hdc, int x, int y, MG_RWops* area, const char *ext)
return ERR_BMP_IMAGE_TYPE;
}
ret = init_bitmap_from_mybmp (hdc, &bmp, &my_bmp, pal, FALSE);
ret = init_bitmap_from_mybmp (hdc, &bmp, &my_bmp, pal, ALLOC_BUFF_LINE);
if (ret)
goto fail1;
@@ -988,7 +1004,7 @@ int GUIAPI StretchPaintImageEx (HDC hdc, int x, int y, int w, int h,
tmp_mybmp_h = my_bmp.h;
my_bmp.w = w; my_bmp.h = h;
ret = init_bitmap_from_mybmp (hdc, &bmp, &my_bmp, pal, FALSE);
ret = init_bitmap_from_mybmp (hdc, &bmp, &my_bmp, pal, ALLOC_BUFF_LINE);
my_bmp.w = tmp_mybmp_w; my_bmp.h = tmp_mybmp_h;
if (ret)