palette.c File Reference

#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "objbase.h"
#include "wincodecs_private.h"
#include "wine/debug.h"

Include dependency graph for palette.c:

Go to the source code of this file.

Classes
struct	PaletteImpl
struct	histogram
struct	box

Macros
#define	COBJMACROS
#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

Functions
	WINE_DEFAULT_DEBUG_CHANNEL (wincodecs)
static PaletteImpl *	impl_from_IWICPalette (IWICPalette *iface)
static HRESULT WINAPI	PaletteImpl_QueryInterface (IWICPalette *iface, REFIID iid, void **ppv)
static ULONG WINAPI	PaletteImpl_AddRef (IWICPalette *iface)
static ULONG WINAPI	PaletteImpl_Release (IWICPalette *iface)
static WICColor *	generate_gray16_palette (UINT *count)
static WICColor *	generate_gray256_palette (UINT *count)
static WICColor *	generate_halftone8_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone27_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone64_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone125_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone216_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone252_palette (UINT *count, BOOL add_transparent)
static WICColor *	generate_halftone256_palette (UINT *count, BOOL add_transparent)
static HRESULT WINAPI	PaletteImpl_InitializePredefined (IWICPalette *iface, WICBitmapPaletteType type, BOOL add_transparent)
static HRESULT WINAPI	PaletteImpl_InitializeCustom (IWICPalette *iface, WICColor *pColors, UINT colorCount)
static 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)
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)
static unsigned int	box_count (struct histogram *h, struct box *b)
static unsigned int	box_color (struct histogram *h, struct box *b)
static unsigned int	box_score (struct box *b)
static void	shrink_box (struct histogram *h, struct box *b)
static void	set_avg (int *min, int *max)
static void	split_box (struct histogram *h, struct box *b1, struct box *b2)
static struct box *	find_box_max_count (struct box *b, int count)
static struct box *	find_box_max_score (struct box *b, int count)
static int	median_cut (unsigned char *image, unsigned int width, unsigned int height, unsigned int stride, int desired, unsigned int *colors)
static HRESULT WINAPI	PaletteImpl_InitializeFromBitmap (IWICPalette *palette, IWICBitmapSource *source, UINT desired, BOOL add_transparent)
static HRESULT WINAPI	PaletteImpl_InitializeFromPalette (IWICPalette *iface, IWICPalette *source)
static HRESULT WINAPI	PaletteImpl_GetType (IWICPalette *iface, WICBitmapPaletteType *pePaletteType)
static HRESULT WINAPI	PaletteImpl_GetColorCount (IWICPalette *iface, UINT *pcCount)
static HRESULT WINAPI	PaletteImpl_GetColors (IWICPalette *iface, UINT colorCount, WICColor *pColors, UINT *pcActualColors)
static HRESULT WINAPI	PaletteImpl_IsBlackWhite (IWICPalette *iface, BOOL *pfIsBlackWhite)
static HRESULT WINAPI	PaletteImpl_IsGrayscale (IWICPalette *iface, BOOL *pfIsGrayscale)
static HRESULT WINAPI	PaletteImpl_HasAlpha (IWICPalette *iface, BOOL *pfHasAlpha)
HRESULT	PaletteImpl_Create (IWICPalette **palette)

Variables
static const IWICPaletteVtbl	PaletteImpl_Vtbl

Macro Definition Documentation

B_COUNT

#define B_COUNT   (1 << 5)

Definition at line 456 of file palette.c.

B_SCALE

#define B_SCALE   1

Definition at line 458 of file palette.c.

B_SHIFT

#define B_SHIFT   (8 - 5)

Definition at line 457 of file palette.c.

COBJMACROS

#define COBJMACROS

Definition at line 23 of file palette.c.

G_COUNT

#define G_COUNT   (1 << 6)

Definition at line 452 of file palette.c.

G_SCALE

#define G_SCALE   3

Definition at line 454 of file palette.c.

G_SHIFT

#define G_SHIFT   (8 - 6)

Definition at line 453 of file palette.c.

R_COUNT

#define R_COUNT   (1 << 5)

Definition at line 448 of file palette.c.

R_SCALE

#define R_SCALE   2

Definition at line 450 of file palette.c.

R_SHIFT

#define R_SHIFT   (8 - 5)

Definition at line 449 of file palette.c.

Function Documentation

box_color()

static unsigned int box_color ( struct histogram *  h, struct box *  b  )

inlinestatic

Definition at line 518 of file palette.c.

{
    return histogram_color(h, b->r_min, b->r_max, b->g_min, b->g_max, b->b_min, b->b_max);
}

Referenced by median_cut().

box_count()

static unsigned int box_count ( struct histogram *  h, struct box *  b  )

inlinestatic

Definition at line 512 of file palette.c.

{
    return histogram_count(h, b->r_min, b->r_max, b->g_min, b->g_max, b->b_min, b->b_max);
}

Referenced by shrink_box().

box_score()

static unsigned int box_score ( struct box *  b )

inlinestatic

Definition at line 524 of file palette.c.

{
    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;
}

Referenced by shrink_box().

find_box_max_count()

static struct box * find_box_max_count ( struct box *  b, int  count  )

static

Definition at line 586 of file palette.c.

{
    struct box *best = NULL;
    for (; count--; b++)
        if (b->score && (!best || b->count > best->count)) best = b;
    return best;
}

Referenced by median_cut().

find_box_max_score()

static struct box * find_box_max_score ( struct box *  b, int  count  )

static

Definition at line 595 of file palette.c.

{
    struct box *best = NULL;
    for (; count--; b++)
        if (b->score && (!best || b->score > best->score)) best = b;
    return best;
}

Referenced by median_cut().

generate_gray16_palette()

static WICColor * generate_gray16_palette ( UINT *  count )

static

Definition at line 100 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = 16;
    entries = malloc(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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_gray256_palette()

static WICColor * generate_gray256_palette ( UINT *  count )

static

Definition at line 117 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = 256;
    entries = malloc(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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone125_palette()

static WICColor * generate_halftone125_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 222 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 127 : 126;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone216_palette()

static WICColor * generate_halftone216_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 247 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 225 : 224;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone252_palette()

static WICColor * generate_halftone252_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 279 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 253 : 252;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone256_palette()

static WICColor * generate_halftone256_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 304 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = 256;
    entries = malloc(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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone27_palette()

static WICColor * generate_halftone27_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 165 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 29 : 28;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone64_palette()

static WICColor * generate_halftone64_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 190 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 73 : 72;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

generate_halftone8_palette()

static WICColor * generate_halftone8_palette ( UINT *  count, BOOL  add_transparent  )

static

Definition at line 134 of file palette.c.

{
    WICColor *entries;
    UINT i;
 
    *count = add_transparent ? 17 : 16;
    entries = malloc(*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;
}

Referenced by PaletteImpl_InitializePredefined(), and test_predefined_palette().

histogram_color()

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  )

static

Definition at line 488 of file palette.c.

{
    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;
}

Referenced by box_color().

histogram_count()

static 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  )

inlinestatic

Definition at line 475 of file palette.c.

{
    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;
}

Referenced by box_count(), and shrink_box().

impl_from_IWICPalette()

static PaletteImpl * impl_from_IWICPalette ( IWICPalette *  iface )

inlinestatic

Definition at line 45 of file palette.c.

{
    return CONTAINING_RECORD(iface, PaletteImpl, IWICPalette_iface);
}

Referenced by PaletteImpl_AddRef(), PaletteImpl_GetColorCount(), PaletteImpl_GetColors(), PaletteImpl_GetType(), PaletteImpl_HasAlpha(), PaletteImpl_InitializeCustom(), PaletteImpl_InitializeFromPalette(), PaletteImpl_InitializePredefined(), PaletteImpl_IsBlackWhite(), PaletteImpl_IsGrayscale(), PaletteImpl_QueryInterface(), and PaletteImpl_Release().

median_cut()

static int median_cut ( unsigned char *  image, unsigned int  width, unsigned int  height, unsigned int  stride, int  desired, unsigned int *  colors  )

static

Definition at line 605 of file palette.c.

{
    struct box boxes[256];
    struct histogram *h;
    unsigned int x, y;
    unsigned char *p;
    struct box *b1, *b2;
    int numboxes, i;
 
    if (!(h = calloc(1, 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]);
 
    free(h);
    return numboxes;
}

Referenced by PaletteImpl_InitializeFromBitmap().

PaletteImpl_AddRef()

static ULONG WINAPI PaletteImpl_AddRef ( IWICPalette *  iface )

static

Definition at line 72 of file palette.c.

{
    PaletteImpl *This = impl_from_IWICPalette(iface);
    ULONG ref = InterlockedIncrement(&This->ref);
 
    TRACE("(%p) refcount=%lu\n", iface, ref);
 
    return ref;
}

PaletteImpl_Create()

HRESULT PaletteImpl_Create

(

IWICPalette **

palette

)

Definition at line 897 of file palette.c.

{
    PaletteImpl *This;
 
    This = malloc(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;
#ifdef __REACTOS__
    InitializeCriticalSection(&This->lock);
#else
    InitializeCriticalSectionEx(&This->lock, 0, RTL_CRITICAL_SECTION_FLAG_FORCE_DEBUG_INFO);
#endif
    This->lock.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": PaletteImpl.lock");
 
    *palette = &This->IWICPalette_iface;
 
    return S_OK;
}

Referenced by BitmapImpl_SetPalette(), copypixels_to_32bppBGRA(), create_bitmap_from_source_rect(), FormatConverter_Initialize(), ImagingFactory_CreateBitmapFromHBITMAP(), and ImagingFactory_CreatePalette().

PaletteImpl_GetColorCount()

static HRESULT WINAPI PaletteImpl_GetColorCount ( IWICPalette *  iface, UINT *  pcCount  )

static

Definition at line 778 of file palette.c.

{
    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;
}

PaletteImpl_GetColors()

static HRESULT WINAPI PaletteImpl_GetColors ( IWICPalette *  iface, UINT  colorCount, WICColor *  pColors, UINT *  pcActualColors  )

static

Definition at line 793 of file palette.c.

{
    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;
}

PaletteImpl_GetType()

static HRESULT WINAPI PaletteImpl_GetType ( IWICPalette *  iface, WICBitmapPaletteType *  pePaletteType  )

static

Definition at line 762 of file palette.c.

{
    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;
}

PaletteImpl_HasAlpha()

static HRESULT WINAPI PaletteImpl_HasAlpha ( IWICPalette *  iface, BOOL *  pfHasAlpha  )

static

Definition at line 858 of file palette.c.

{
    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;
}

PaletteImpl_InitializeCustom()

static HRESULT WINAPI PaletteImpl_InitializeCustom ( IWICPalette *  iface, WICColor *  pColors, UINT  colorCount  )

static

Definition at line 418 of file palette.c.

{
    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 = malloc(sizeof(WICColor) * colorCount);
        if (!new_colors) return E_OUTOFMEMORY;
        memcpy(new_colors, pColors, sizeof(WICColor) * colorCount);
    }
 
    EnterCriticalSection(&This->lock);
    free(This->colors);
    This->colors = new_colors;
    This->count = colorCount;
    This->type = WICBitmapPaletteTypeCustom;
    LeaveCriticalSection(&This->lock);
 
    return S_OK;
}

PaletteImpl_InitializeFromBitmap()

static HRESULT WINAPI PaletteImpl_InitializeFromBitmap ( IWICPalette *  palette, IWICBitmapSource *  source, UINT  desired, BOOL  add_transparent  )

static

Definition at line 649 of file palette.c.

{
    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 = create_instance(&CLSID_WICImagingFactory, &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;
}

PaletteImpl_InitializeFromPalette()

static HRESULT WINAPI PaletteImpl_InitializeFromPalette ( IWICPalette *  iface, IWICPalette *  source  )

static

Definition at line 723 of file palette.c.

{
    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 = malloc(sizeof(WICColor) * count);
        if (!colors) return E_OUTOFMEMORY;
        hr = IWICPalette_GetColors(source, count, colors, &count);
        if (hr != S_OK)
        {
            free(colors);
            return hr;
        }
    }
 
    EnterCriticalSection(&This->lock);
    free(This->colors);
    This->colors = colors;
    This->count = count;
    This->type = type;
    LeaveCriticalSection(&This->lock);
 
    return S_OK;
}

PaletteImpl_InitializePredefined()

static HRESULT WINAPI PaletteImpl_InitializePredefined ( IWICPalette *  iface, WICBitmapPaletteType  type, BOOL  add_transparent  )

static

Definition at line 329 of file palette.c.

{
    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 = malloc(count * sizeof(WICColor));
        if (!colors) return E_OUTOFMEMORY;
        colors[0] = 0xff000000;
        colors[1] = 0xffffffff;
        break;
 
    case WICBitmapPaletteTypeFixedGray4:
        count = 4;
        colors = malloc(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);
    free(This->colors);
    This->colors = colors;
    This->count = count;
    This->type = type;
    LeaveCriticalSection(&This->lock);
 
    return S_OK;
}

PaletteImpl_IsBlackWhite()

static HRESULT WINAPI PaletteImpl_IsBlackWhite ( IWICPalette *  iface, BOOL *  pfIsBlackWhite  )

static

Definition at line 815 of file palette.c.

{
    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;
}

PaletteImpl_IsGrayscale()

static HRESULT WINAPI PaletteImpl_IsGrayscale ( IWICPalette *  iface, BOOL *  pfIsGrayscale  )

static

Definition at line 833 of file palette.c.

{
    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;
}

PaletteImpl_QueryInterface()

static HRESULT WINAPI PaletteImpl_QueryInterface ( IWICPalette *  iface, REFIID  iid, void **  ppv  )

static

Definition at line 50 of file palette.c.

{
    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;
}

PaletteImpl_Release()

static ULONG WINAPI PaletteImpl_Release ( IWICPalette *  iface )

static

Definition at line 82 of file palette.c.

{
    PaletteImpl *This = impl_from_IWICPalette(iface);
    ULONG ref = InterlockedDecrement(&This->ref);
 
    TRACE("(%p) refcount=%lu\n", iface, ref);
 
    if (ref == 0)
    {
        This->lock.DebugInfo->Spare[0] = 0;
        DeleteCriticalSection(&This->lock);
        free(This->colors);
        free(This);
    }
 
    return ref;
}

set_avg()

static void set_avg ( int *  min, int *  max  )

inlinestatic

Definition at line 554 of file palette.c.

{
    int avg = (*min + *max) / 2;
    *min = avg + 1;
    *max = avg;
}

Referenced by split_box().

shrink_box()

static void shrink_box ( struct histogram *  h, struct box *  b  )

static

Definition at line 534 of file palette.c.

{
    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);
}

Referenced by median_cut(), and split_box().

split_box()

static void split_box ( struct histogram *  h, struct box *  b1, struct box *  b2  )

static

Definition at line 562 of file palette.c.

{
    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);
}

Referenced by median_cut().

WINE_DEFAULT_DEBUG_CHANNEL()

WINE_DEFAULT_DEBUG_CHANNEL

(

wincodecs

)

Variable Documentation

PaletteImpl_Vtbl

const IWICPaletteVtbl PaletteImpl_Vtbl

static

Initial value:

= {
    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
}

Definition at line 881 of file palette.c.

Referenced by PaletteImpl_Create().