?? bitmap.c
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int x; x = 0; /* This can be greatly optimized with loop */ /* unrolling; omitted to save space. */ while (x < dst->bmWidth) { *(unsigned *) (dp2 + x * 4) = *(unsigned *) (dp1 + (sx >> 16) * 4); sx += xfactor; x++; } dp2 += dst->bmPitch; y++; while (y < dst->bmHeight) { int l; int syint = sy >> 16; sy += yfactor; if ((sy >> 16) != syint) break; /* Copy identical lines. */ l = dp2 - dp2old; memcpy(dp2, dp2old, l); dp2old = dp2; dp2 += l; y++; } dp1 = src->bmBits + (sy >> 16) * src->bmPitch; } } break; } return TRUE;}gal_pixel GUIAPI GetPixelInBitmap (const BITMAP* bmp, int x, int y){ BYTE* dst; if (x < 0 || y < 0 || x >= bmp->bmWidth || y >= bmp->bmHeight) return 0; dst = bmp->bmBits + y * bmp->bmPitch + x * bmp->bmBytesPerPixel; return _mem_get_pixel (dst, bmp->bmBytesPerPixel);}BOOL GUIAPI SetPixelInBitmap (const BITMAP* bmp, int x, int y, gal_pixel pixel){ BYTE* dst; if (x < 0 || y < 0 || x >= bmp->bmWidth || y >= bmp->bmHeight) return FALSE; dst = bmp->bmBits + y * bmp->bmPitch + x * bmp->bmBytesPerPixel; _mem_set_pixel (dst, bmp->bmBytesPerPixel, pixel); return TRUE;}// This function expand monochorate bitmap.void GUIAPI ExpandMonoBitmap (HDC hdc, BYTE* bits, Uint32 pitch, const BYTE* my_bits, Uint32 my_pitch, Uint32 w, Uint32 h, DWORD flags, Uint32 bg, Uint32 fg){ Uint32 x, y; BYTE *dst, *dst_line; const BYTE *src, *src_line; Uint32 pixel; int bpp = GAL_BytesPerPixel (dc_HDC2PDC (hdc)->surface); BYTE byte = 0; dst_line = bits; if (flags & MYBMP_FLOW_UP) src_line = my_bits + my_pitch * (h - 1); else src_line = my_bits; // expand bits here. for (y = 0; y < h; y++) { src = src_line; dst = dst_line; for (x = 0; x < w; x++) { if (x % 8 == 0) byte = *src++; if ((byte & (128 >> (x % 8)))) /* pixel */ pixel = fg; else pixel = bg; dst = _mem_set_pixel (dst, bpp, pixel); } if (flags & MYBMP_FLOW_UP) src_line -= my_pitch; else src_line += my_pitch; dst_line += pitch; }}static const RGB WindowsStdColor [] = { {0x00, 0x00, 0x00}, // black --0 {0x80, 0x00, 0x00}, // dark red --1 {0x00, 0x80, 0x00}, // dark green --2 {0x80, 0x80, 0x00}, // dark yellow --3 {0x00, 0x00, 0x80}, // dark blue --4 {0x80, 0x00, 0x80}, // dark magenta --5 {0x00, 0x80, 0x80}, // dark cyan --6 {0xC0, 0xC0, 0xC0}, // light gray --7 {0x80, 0x80, 0x80}, // dark gray --8 {0xFF, 0x00, 0x00}, // red --9 {0x00, 0xFF, 0x00}, // green --10 {0xFF, 0xFF, 0x00}, // yellow --11 {0x00, 0x00, 0xFF}, // blue --12 {0xFF, 0x00, 0xFF}, // magenta --13 {0x00, 0xFF, 0xFF}, // cyan --14 {0xFF, 0xFF, 0xFF}, // light white --15};// This function expand 16-color bitmap.void GUIAPI Expand16CBitmap (HDC hdc, BYTE* bits, Uint32 pitch, const BYTE* my_bits, Uint32 my_pitch, Uint32 w, Uint32 h, DWORD flags, const RGB* pal){ PDC pdc; Uint32 x, y; BYTE *dst, *dst_line; const BYTE *src, *src_line; int index, bpp; Uint32 pixel; BYTE byte = 0; pdc = dc_HDC2PDC(hdc); bpp = GAL_BytesPerPixel (pdc->surface); dst_line = bits; if (flags & MYBMP_FLOW_UP) src_line = my_bits + my_pitch * (h - 1); else src_line = my_bits; for (y = 0; y < h; y++) { src = src_line; dst = dst_line; for (x = 0; x < w; x++) { if (x % 2 == 0) { byte = *src++; index = (byte >> 4) & 0x0f; } else index = byte & 0x0f; if (pal) pixel = GAL_MapRGB (pdc->surface->format, pal[index].r, pal[index].g, pal[index].b); else pixel = GAL_MapRGB (pdc->surface->format, WindowsStdColor[index].r, WindowsStdColor[index].g, WindowsStdColor[index].b); dst = _mem_set_pixel (dst, bpp, pixel); } if (flags & MYBMP_FLOW_UP) src_line -= my_pitch; else src_line += my_pitch; dst_line += pitch; }}// This function expands 256-color bitmap.void GUIAPI Expand256CBitmap (HDC hdc, BYTE* bits, Uint32 pitch, const BYTE* my_bits, Uint32 my_pitch, Uint32 w, Uint32 h, DWORD flags, const RGB* pal){ PDC pdc; Uint32 x, y; int bpp; BYTE *dst, *dst_line; const BYTE *src, *src_line; Uint32 pixel; BYTE byte; pdc = dc_HDC2PDC(hdc); bpp = GAL_BytesPerPixel (pdc->surface); dst_line = bits; if (flags & MYBMP_FLOW_UP) src_line = my_bits + my_pitch * (h - 1); else src_line = my_bits; for (y = 0; y < h; y++) { src = src_line; dst = dst_line; for (x = 0; x < w; x++) { byte = *src++; if (pal) pixel = GAL_MapRGB (pdc->surface->format, pal[byte].r, pal[byte].g, pal[byte].b); else pixel = GAL_MapRGB (pdc->surface->format, byte, byte, byte); dst = _mem_set_pixel (dst, bpp, pixel); } if (flags & MYBMP_FLOW_UP) src_line -= my_pitch; else src_line += my_pitch; dst_line += pitch; }}// This function compile a RGBA bitmapvoid GUIAPI CompileRGBABitmap (HDC hdc, BYTE* bits, Uint32 pitch, const BYTE* my_bits, Uint32 my_pitch, Uint32 w, Uint32 h, DWORD flags, void* pixel_format){ PDC pdc; Uint32 x, y; int bpp; BYTE *dst, *dst_line; const BYTE *src, *src_line; Uint32 pixel; GAL_Color rgb; pdc = dc_HDC2PDC(hdc); bpp = GAL_BytesPerPixel (pdc->surface); dst_line = bits; if (flags & MYBMP_FLOW_UP) src_line = my_bits + my_pitch * (h - 1); else src_line = my_bits; // expand bits here. for (y = 0; y < h; y++) { src = src_line; dst = dst_line; for (x = 0; x < w; x++) { if ((flags & MYBMP_TYPE_MASK) == MYBMP_TYPE_BGR) { rgb.b = *src++; rgb.g = *src++; rgb.r = *src++; } else { rgb.r = *src++; rgb.g = *src++; rgb.b = *src++; } if (flags & MYBMP_RGBSIZE_4) { if (flags & MYBMP_ALPHA) { rgb.a = *src; pixel = GAL_MapRGBA ((GAL_PixelFormat*) pixel_format, rgb.r, rgb.g, rgb.b, rgb.a); } else { pixel = GAL_MapRGB (pdc->surface->format, rgb.r, rgb.g, rgb.b); } src++; } else { pixel = GAL_MapRGB (pdc->surface->format, rgb.r, rgb.g, rgb.b); } dst = _mem_set_pixel (dst, bpp, pixel); } if (flags & MYBMP_FLOW_UP) src_line -= my_pitch; else src_line += my_pitch; dst_line += pitch; }}// This function replaces one color with specified color.void GUIAPI ReplaceBitmapColor (HDC hdc, BITMAP* bmp, gal_pixel iOColor, gal_pixel iNColor){ PDC pdc; int w, h, i; BYTE* line, *bits; int bpp; pdc = dc_HDC2PDC (hdc); bpp = GAL_BytesPerPixel (pdc->surface); h = bmp->bmHeight; w = bmp->bmWidth; line = bmp->bmBits; switch (bpp) { case 1: while (h--) { bits = line; for (i = 0; i < w; i++) { if (*bits == iOColor) *bits = iNColor; bits++; } line += bmp->bmPitch; } break; case 2: while (h--) { bits = line; for (i = 0; i < w; i++) { if( *(Uint16 *) bits == iOColor) *(Uint16 *) bits = iNColor; bits += 2; } line += bmp->bmPitch; } break; case 3: while (h--) { bits = line; for (i = 0; i < w; i++) { if ((*(Uint16 *) bits == iOColor) && (*(bits + 2) == (iOColor >> 16)) ) { *(Uint16 *) bits = iNColor; *(bits + 2) = iNColor >> 16; } bits += 3; } line += bmp->bmPitch; } break; case 4: while (h--) { bits = line; for (i = 0; i < w; i++) { if( *(Uint32 *) bits == iOColor ) *(Uint32 *) bits = iNColor; bits += 4; } line += bmp->bmPitch; } break; }}?? 快捷鍵說明
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