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reactos/dll/win32/windowscodecs/palette.c

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/*
* Copyright 2009 Vincent Povirk for CodeWeavers
* Copyright 2012,2016 Dmitry Timoshkov
* Copyright 2016 Sebastian Lackner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdarg.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wincodecs);
typedef struct {
IWICPalette IWICPalette_iface;
LONG ref;
UINT count;
WICColor *colors;
WICBitmapPaletteType type;
CRITICAL_SECTION lock; /* must be held when count, colors, or type is accessed */
} PaletteImpl;
static inline PaletteImpl *impl_from_IWICPalette(IWICPalette *iface)
{
return CONTAINING_RECORD(iface, PaletteImpl, IWICPalette_iface);
}
static HRESULT WINAPI PaletteImpl_QueryInterface(IWICPalette *iface, REFIID iid,
void **ppv)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%s,%p)\n", iface, debugstr_guid(iid), ppv);
if (!ppv) return E_INVALIDARG;
if (IsEqualIID(&IID_IUnknown, iid) || IsEqualIID(&IID_IWICPalette, iid))
{
*ppv = &This->IWICPalette_iface;
}
else
{
*ppv = NULL;
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppv);
return S_OK;
}
static ULONG WINAPI PaletteImpl_AddRef(IWICPalette *iface)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
ULONG ref = InterlockedIncrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
return ref;
}
static ULONG WINAPI PaletteImpl_Release(IWICPalette *iface)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
ULONG ref = InterlockedDecrement(&This->ref);
TRACE("(%p) refcount=%u\n", iface, ref);
if (ref == 0)
{
This->lock.DebugInfo->Spare[0] = 0;
DeleteCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->colors);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
static WICColor *generate_gray16_palette(UINT *count)
{
WICColor *entries;
UINT i;
*count = 16;
entries = HeapAlloc(GetProcessHeap(), 0, 16 * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 16; i++)
{
entries[i] = 0xff000000;
entries[i] |= (i<<20) | (i<<16) | (i<<12) | (i<<8) | (i<<4) | i;
}
return entries;
}
static WICColor *generate_gray256_palette(UINT *count)
{
WICColor *entries;
UINT i;
*count = 256;
entries = HeapAlloc(GetProcessHeap(), 0, 256 * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 256; i++)
{
entries[i] = 0xff000000;
entries[i] |= (i<<16) | (i<<8) | i;
}
return entries;
}
static WICColor *generate_halftone8_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 17 : 16;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 8; i++)
{
entries[i] = 0xff000000;
if (i & 1) entries[i] |= 0xff;
if (i & 2) entries[i] |= 0xff00;
if (i & 4) entries[i] |= 0xff0000;
}
for (i = 8; i < 16; i++)
{
static const DWORD halftone[8] = { 0xc0c0c0, 0x808080, 0x800000, 0x008000,
0x000080, 0x808000, 0x800080, 0x008080 };
entries[i] = 0xff000000;
entries[i] |= halftone[i-8];
}
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone27_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 29 : 28;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 27; i++)
{
static const BYTE halftone_values[4] = { 0x00,0x80,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values[i%3];
entries[i] |= halftone_values[(i/3)%3] << 8;
entries[i] |= halftone_values[(i/9)%3] << 16;
}
entries[i++] = 0xffc0c0c0;
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone64_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 73 : 72;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 64; i++)
{
static const BYTE halftone_values[4] = { 0x00,0x55,0xaa,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values[i%4];
entries[i] |= halftone_values[(i/4)%4] << 8;
entries[i] |= halftone_values[(i/16)%4] << 16;
}
for (i = 64; i < 72; i++)
{
static const DWORD halftone[8] = { 0xc0c0c0, 0x808080, 0x800000, 0x008000,
0x000080, 0x808000, 0x800080, 0x008080 };
entries[i] = 0xff000000;
entries[i] |= halftone[i-64];
}
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone125_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 127 : 126;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 125; i++)
{
static const BYTE halftone_values[5] = { 0x00,0x40,0x80,0xbf,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values[i%5];
entries[i] |= halftone_values[(i/5)%5] << 8;
entries[i] |= halftone_values[(i/25)%5] << 16;
}
entries[i++] = 0xffc0c0c0;
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone216_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 225 : 224;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 216; i++)
{
static const BYTE halftone_values[6] = { 0x00,0x33,0x66,0x99,0xcc,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values[i%6];
entries[i] |= halftone_values[(i/6)%6] << 8;
entries[i] |= halftone_values[(i/36)%6] << 16;
}
for (i = 216; i < 224; i++)
{
static const DWORD halftone[8] = { 0xc0c0c0, 0x808080, 0x800000, 0x008000,
0x000080, 0x808000, 0x800080, 0x008080 };
entries[i] = 0xff000000;
entries[i] |= halftone[i-216];
}
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone252_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = add_transparent ? 253 : 252;
entries = HeapAlloc(GetProcessHeap(), 0, *count * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 252; i++)
{
static const BYTE halftone_values_rb[6] = { 0x00,0x33,0x66,0x99,0xcc,0xff };
static const BYTE halftone_values_g[7] = { 0x00,0x2b,0x55,0x80,0xaa,0xd5,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values_rb[i%6];
entries[i] |= halftone_values_g[(i/6)%7] << 8;
entries[i] |= halftone_values_rb[(i/42)%6] << 16;
}
if (add_transparent)
entries[i] = 0;
return entries;
}
static WICColor *generate_halftone256_palette(UINT *count, BOOL add_transparent)
{
WICColor *entries;
UINT i;
*count = 256;
entries = HeapAlloc(GetProcessHeap(), 0, 256 * sizeof(WICColor));
if (!entries) return NULL;
for (i = 0; i < 256; i++)
{
static const BYTE halftone_values_b[4] = { 0x00,0x55,0xaa,0xff };
static const BYTE halftone_values_gr[8] = { 0x00,0x24,0x49,0x6d,0x92,0xb6,0xdb,0xff };
entries[i] = 0xff000000;
entries[i] |= halftone_values_b[i%4];
entries[i] |= halftone_values_gr[(i/4)%8] << 8;
entries[i] |= halftone_values_gr[(i/32)%8] << 16;
}
if (add_transparent)
entries[255] = 0;
return entries;
}
static HRESULT WINAPI PaletteImpl_InitializePredefined(IWICPalette *iface,
WICBitmapPaletteType type, BOOL add_transparent)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
WICColor *colors;
UINT count;
TRACE("(%p,%u,%d)\n", iface, type, add_transparent);
switch (type)
{
case WICBitmapPaletteTypeFixedBW:
count = 2;
colors = HeapAlloc(GetProcessHeap(), 0, count * sizeof(WICColor));
if (!colors) return E_OUTOFMEMORY;
colors[0] = 0xff000000;
colors[1] = 0xffffffff;
break;
case WICBitmapPaletteTypeFixedGray4:
count = 4;
colors = HeapAlloc(GetProcessHeap(), 0, count * sizeof(WICColor));
if (!colors) return E_OUTOFMEMORY;
colors[0] = 0xff000000;
colors[1] = 0xff555555;
colors[2] = 0xffaaaaaa;
colors[3] = 0xffffffff;
break;
case WICBitmapPaletteTypeFixedGray16:
colors = generate_gray16_palette(&count);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedGray256:
colors = generate_gray256_palette(&count);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone8:
colors = generate_halftone8_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone27:
colors = generate_halftone27_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone64:
colors = generate_halftone64_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone125:
colors = generate_halftone125_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone216:
colors = generate_halftone216_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone252:
colors = generate_halftone252_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
case WICBitmapPaletteTypeFixedHalftone256:
colors = generate_halftone256_palette(&count, add_transparent);
if (!colors) return E_OUTOFMEMORY;
break;
default:
WARN("invalid palette type %u\n", type);
return E_INVALIDARG;
}
EnterCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->colors);
This->colors = colors;
This->count = count;
This->type = type;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_InitializeCustom(IWICPalette *iface,
WICColor *pColors, UINT colorCount)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
WICColor *new_colors;
TRACE("(%p,%p,%u)\n", iface, pColors, colorCount);
if (colorCount == 0)
{
new_colors = NULL;
}
else
{
if (!pColors) return E_INVALIDARG;
new_colors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * colorCount);
if (!new_colors) return E_OUTOFMEMORY;
memcpy(new_colors, pColors, sizeof(WICColor) * colorCount);
}
EnterCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->colors);
This->colors = new_colors;
This->count = colorCount;
This->type = WICBitmapPaletteTypeCustom;
LeaveCriticalSection(&This->lock);
return S_OK;
}
#define R_COUNT (1 << 5)
#define R_SHIFT (8 - 5)
#define R_SCALE 2
#define G_COUNT (1 << 6)
#define G_SHIFT (8 - 6)
#define G_SCALE 3
#define B_COUNT (1 << 5)
#define B_SHIFT (8 - 5)
#define B_SCALE 1
struct histogram
{
unsigned int data[R_COUNT][G_COUNT][B_COUNT];
};
struct box
{
int r_min, r_max;
int g_min, g_max;
int b_min, b_max;
unsigned int count;
unsigned int score;
};
/* count nonzero elements in the histogram range [r_min, r_max] x [g_min, g_max] x [b_min, b_max] */
static inline unsigned int histogram_count(struct histogram *h, int r_min, int r_max,
int g_min, int g_max, int b_min, int b_max)
{
unsigned int count = 0;
int r, g, b;
for (r = r_min; r <= r_max; r++)
for (g = g_min; g <= g_max; g++)
for (b = b_min; b <= b_max; b++)
if (h->data[r][g][b] != 0) count++;
return count;
}
/* compute weighted average color in the range [r_min, r_max] x [g_min, g_max] x [b_min, b_max] */
static unsigned int histogram_color(struct histogram *h, int r_min, int r_max,
int g_min, int g_max, int b_min, int b_max)
{
unsigned long long r_sum = 0, g_sum = 0, b_sum = 0;
unsigned int tmp, count = 0;
int r, g, b;
for (r = r_min; r <= r_max; r++)
for (g = g_min; g <= g_max; g++)
for (b = b_min; b <= b_max; b++)
{
if (!(tmp = h->data[r][g][b])) continue;
r_sum += ((r << R_SHIFT) + ((1 << R_SHIFT) / 2)) * tmp;
g_sum += ((g << G_SHIFT) + ((1 << G_SHIFT) / 2)) * tmp;
b_sum += ((b << B_SHIFT) + ((1 << B_SHIFT) / 2)) * tmp;
count += tmp;
}
return ((b_sum + (count / 2)) / count) |
((g_sum + (count / 2)) / count) << 8 |
((r_sum + (count / 2)) / count) << 16 | 0xff000000;
}
/* same as histogram_count */
static inline unsigned int box_count(struct histogram *h, struct box *b)
{
return histogram_count(h, b->r_min, b->r_max, b->g_min, b->g_max, b->b_min, b->b_max);
}
/* same as histogram_color */
static inline unsigned int box_color(struct histogram *h, struct box *b)
{
return histogram_color(h, b->r_min, b->r_max, b->g_min, b->g_max, b->b_min, b->b_max);
}
/* compute score used to determine best split (also called "volume") */
static inline unsigned int box_score(struct box *b)
{
unsigned int tmp, sum = 0;
tmp = ((b->r_max - b->r_min) << R_SHIFT) * R_SCALE; sum += tmp * tmp;
tmp = ((b->g_max - b->g_min) << G_SHIFT) * G_SCALE; sum += tmp * tmp;
tmp = ((b->b_max - b->b_min) << B_SHIFT) * B_SCALE; sum += tmp * tmp;
return sum;
}
/* attempt to shrink a box */
static void shrink_box(struct histogram *h, struct box *b)
{
int i;
for (i = b->r_min; i <= b->r_max; i++)
if (histogram_count(h, i, i, b->g_min, b->g_max, b->b_min, b->b_max)) { b->r_min = i; break; }
for (i = b->r_max; i >= b->r_min; i--)
if (histogram_count(h, i, i, b->g_min, b->g_max, b->b_min, b->b_max)) { b->r_max = i; break; }
for (i = b->g_min; i <= b->g_max; i++)
if (histogram_count(h, b->r_min, b->r_max, i, i, b->b_min, b->b_max)) { b->g_min = i; break; }
for (i = b->g_max; i >= b->g_min; i--)
if (histogram_count(h, b->r_min, b->r_max, i, i, b->b_min, b->b_max)) { b->g_max = i; break; }
for (i = b->b_min; i <= b->b_max; i++)
if (histogram_count(h, b->r_min, b->r_max, b->g_min, b->g_max, i, i)) { b->b_min = i; break; }
for (i = b->b_max; i >= b->b_min; i--)
if (histogram_count(h, b->r_min, b->r_max, b->g_min, b->g_max, i, i)) { b->b_max = i; break; }
b->count = box_count(h, b);
b->score = box_score(b);
}
/* helper for split_box */
static inline void set_avg(int *min, int *max)
{
int avg = (*min + *max) / 2;
*min = avg + 1;
*max = avg;
}
/* split a box based on the best axis */
static void split_box(struct histogram *h, struct box *b1, struct box *b2)
{
int r = ((b1->r_max - b1->r_min) << R_SHIFT) * R_SCALE;
int g = ((b1->g_max - b1->g_min) << G_SHIFT) * G_SCALE;
int b = ((b1->b_max - b1->b_min) << B_SHIFT) * B_SCALE;
*b2 = *b1;
if (r > g)
{
if (b > r) set_avg(&b1->b_min, &b2->b_max);
else set_avg(&b1->r_min, &b2->r_max);
}
else
{
if (b > g) set_avg(&b1->b_min, &b2->b_max);
else set_avg(&b1->g_min, &b2->g_max);
}
shrink_box(h, b1);
shrink_box(h, b2);
}
/* find box suitable for split based on count */
static struct box *find_box_max_count(struct box *b, int count)
{
struct box *best = NULL;
for (; count--; b++)
if (b->score && (!best || b->count > best->count)) best = b;
return best;
}
/* find box suitable for split based on score */
static struct box *find_box_max_score(struct box *b, int count)
{
struct box *best = NULL;
for (; count--; b++)
if (b->score && (!best || b->score > best->score)) best = b;
return best;
}
/* compute color map with at most 'desired' colors
* image must be in 24bpp BGR format and colors are returned in 0xAARRGGBB format */
static int median_cut(unsigned char *image, unsigned int width, unsigned int height,
unsigned int stride, int desired, unsigned int *colors)
{
struct box boxes[256];
struct histogram *h;
unsigned int x, y;
unsigned char *p;
struct box *b1, *b2;
int numboxes, i;
if (!(h = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*h))))
return 0;
for (y = 0; y < height; y++)
for (x = 0, p = image + y * stride; x < width; x++, p += 3)
h->data[p[2] >> R_SHIFT][p[1] >> G_SHIFT][p[0] >> B_SHIFT]++;
numboxes = 1;
boxes[0].r_min = 0; boxes[0].r_max = R_COUNT - 1;
boxes[0].g_min = 0; boxes[0].g_max = G_COUNT - 1;
boxes[0].b_min = 0; boxes[0].b_max = B_COUNT - 1;
shrink_box(h, &boxes[0]);
while (numboxes <= desired / 2)
{
if (!(b1 = find_box_max_count(boxes, numboxes))) break;
b2 = &boxes[numboxes++];
split_box(h, b1, b2);
}
while (numboxes < desired)
{
if (!(b1 = find_box_max_score(boxes, numboxes))) break;
b2 = &boxes[numboxes++];
split_box(h, b1, b2);
}
for (i = 0; i < numboxes; i++)
colors[i] = box_color(h, &boxes[i]);
HeapFree(GetProcessHeap(), 0, h);
return numboxes;
}
static HRESULT WINAPI PaletteImpl_InitializeFromBitmap(IWICPalette *palette,
IWICBitmapSource *source, UINT desired, BOOL add_transparent)
{
IWICImagingFactory *factory = NULL;
IWICBitmap *rgb24_bitmap = NULL;
IWICBitmapSource *rgb24_source;
IWICBitmapLock *lock = NULL;
WICPixelFormatGUID format;
HRESULT hr;
UINT width, height, stride, size, actual_number_of_colors;
BYTE *src;
WICColor colors[256];
TRACE("(%p,%p,%u,%d)\n", palette, source, desired, add_transparent);
if (!source || desired < 2 || desired > 256)
return E_INVALIDARG;
hr = IWICBitmapSource_GetPixelFormat(source, &format);
if (hr != S_OK) return hr;
/* For interoperability with gdiplus where PixelFormat24bppRGB is actually stored
* as BGR (and there is no corresponding RGB format), we have to use 24bppBGR
* to avoid format conversions.
*/
if (!IsEqualGUID(&format, &GUID_WICPixelFormat24bppBGR))
{
hr = WICConvertBitmapSource(&GUID_WICPixelFormat24bppBGR, source, &rgb24_source);
if (hr != S_OK) return hr;
}
else
rgb24_source = source;
hr = ImagingFactory_CreateInstance(&IID_IWICImagingFactory, (void **)&factory);
if (hr != S_OK) goto fail;
hr = IWICImagingFactory_CreateBitmapFromSource(factory, rgb24_source, WICBitmapCacheOnLoad, &rgb24_bitmap);
if (hr != S_OK) goto fail;
hr = IWICBitmap_Lock(rgb24_bitmap, NULL, WICBitmapLockRead, &lock);
if (hr != S_OK) goto fail;
IWICBitmapLock_GetSize(lock, &width, &height);
IWICBitmapLock_GetStride(lock, &stride);
IWICBitmapLock_GetDataPointer(lock, &size, &src);
actual_number_of_colors = median_cut(src, width, height, stride, add_transparent ? desired - 1 : desired, colors);
TRACE("actual number of colors: %u\n", actual_number_of_colors);
if (actual_number_of_colors)
{
if (add_transparent) colors[actual_number_of_colors++] = 0;
hr = IWICPalette_InitializeCustom(palette, colors, actual_number_of_colors);
}
else
hr = E_OUTOFMEMORY;
fail:
if (lock)
IWICBitmapLock_Release(lock);
if (rgb24_bitmap)
IWICBitmap_Release(rgb24_bitmap);
if (factory)
IWICImagingFactory_Release(factory);
if (rgb24_source != source)
IWICBitmapSource_Release(rgb24_source);
return hr;
}
static HRESULT WINAPI PaletteImpl_InitializeFromPalette(IWICPalette *iface,
IWICPalette *source)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
UINT count;
WICColor *colors = NULL;
WICBitmapPaletteType type;
HRESULT hr;
TRACE("(%p,%p)\n", iface, source);
if (!source) return E_INVALIDARG;
hr = IWICPalette_GetType(source, &type);
if (hr != S_OK) return hr;
hr = IWICPalette_GetColorCount(source, &count);
if (hr != S_OK) return hr;
if (count)
{
colors = HeapAlloc(GetProcessHeap(), 0, sizeof(WICColor) * count);
if (!colors) return E_OUTOFMEMORY;
hr = IWICPalette_GetColors(source, count, colors, &count);
if (hr != S_OK)
{
HeapFree(GetProcessHeap(), 0, colors);
return hr;
}
}
EnterCriticalSection(&This->lock);
HeapFree(GetProcessHeap(), 0, This->colors);
This->colors = colors;
This->count = count;
This->type = type;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_GetType(IWICPalette *iface,
WICBitmapPaletteType *pePaletteType)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%p)\n", iface, pePaletteType);
if (!pePaletteType) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
*pePaletteType = This->type;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_GetColorCount(IWICPalette *iface, UINT *pcCount)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%p)\n", iface, pcCount);
if (!pcCount) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
*pcCount = This->count;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_GetColors(IWICPalette *iface, UINT colorCount,
WICColor *pColors, UINT *pcActualColors)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%i,%p,%p)\n", iface, colorCount, pColors, pcActualColors);
if (!pColors || !pcActualColors) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (This->count < colorCount) colorCount = This->count;
memcpy(pColors, This->colors, sizeof(WICColor) * colorCount);
*pcActualColors = colorCount;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_IsBlackWhite(IWICPalette *iface, BOOL *pfIsBlackWhite)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%p)\n", iface, pfIsBlackWhite);
if (!pfIsBlackWhite) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
if (This->type == WICBitmapPaletteTypeFixedBW)
*pfIsBlackWhite = TRUE;
else
*pfIsBlackWhite = FALSE;
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_IsGrayscale(IWICPalette *iface, BOOL *pfIsGrayscale)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
TRACE("(%p,%p)\n", iface, pfIsGrayscale);
if (!pfIsGrayscale) return E_INVALIDARG;
EnterCriticalSection(&This->lock);
switch(This->type)
{
case WICBitmapPaletteTypeFixedBW:
case WICBitmapPaletteTypeFixedGray4:
case WICBitmapPaletteTypeFixedGray16:
case WICBitmapPaletteTypeFixedGray256:
*pfIsGrayscale = TRUE;
break;
default:
*pfIsGrayscale = FALSE;
}
LeaveCriticalSection(&This->lock);
return S_OK;
}
static HRESULT WINAPI PaletteImpl_HasAlpha(IWICPalette *iface, BOOL *pfHasAlpha)
{
PaletteImpl *This = impl_from_IWICPalette(iface);
UINT i;
TRACE("(%p,%p)\n", iface, pfHasAlpha);
if (!pfHasAlpha) return E_INVALIDARG;
*pfHasAlpha = FALSE;
EnterCriticalSection(&This->lock);
for (i=0; i<This->count; i++)
if ((This->colors[i]&0xff000000) != 0xff000000)
{
*pfHasAlpha = TRUE;
break;
}
LeaveCriticalSection(&This->lock);
return S_OK;
}
static const IWICPaletteVtbl PaletteImpl_Vtbl = {
PaletteImpl_QueryInterface,
PaletteImpl_AddRef,
PaletteImpl_Release,
PaletteImpl_InitializePredefined,
PaletteImpl_InitializeCustom,
PaletteImpl_InitializeFromBitmap,
PaletteImpl_InitializeFromPalette,
PaletteImpl_GetType,
PaletteImpl_GetColorCount,
PaletteImpl_GetColors,
PaletteImpl_IsBlackWhite,
PaletteImpl_IsGrayscale,
PaletteImpl_HasAlpha
};
HRESULT PaletteImpl_Create(IWICPalette **palette)
{
PaletteImpl *This;
This = HeapAlloc(GetProcessHeap(), 0, sizeof(PaletteImpl));
if (!This) return E_OUTOFMEMORY;
This->IWICPalette_iface.lpVtbl = &PaletteImpl_Vtbl;
This->ref = 1;
This->count = 0;
This->colors = NULL;
This->type = WICBitmapPaletteTypeCustom;
InitializeCriticalSection(&This->lock);
This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PaletteImpl.lock");
*palette = &This->IWICPalette_iface;
return S_OK;
}
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