X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c96ea65713a8dd58ae40b10718723b5c92a303e3..7e410431f34f973367763ae6fb91ad78c9b80a94:/src/common/imagbmp.cpp diff --git a/src/common/imagbmp.cpp b/src/common/imagbmp.cpp index 9f92b3c8fc..68fdf8cd71 100644 --- a/src/common/imagbmp.cpp +++ b/src/common/imagbmp.cpp @@ -31,6 +31,7 @@ #include "wx/wfstream.h" #include "wx/intl.h" #include "wx/module.h" +#include "wx/quantize.h" // For memcpy #include @@ -67,10 +68,49 @@ bool wxBMPHandler::SaveFile(wxImage *image, return FALSE; } + // get the format of the BMP file to save, else use 24bpp + unsigned format = wxBMP_24BPP; + if (image->HasOption(wxBMP_FORMAT)) + format = image->GetOptionInt(wxBMP_FORMAT); + + unsigned bpp; // # of bits per pixel + int palette_size; // # of color map entries, ie. 2^bpp colors + + // set the bpp and appropriate palette_size, and do additional checks + if ((format == wxBMP_1BPP) || (format == wxBMP_1BPP_BW)) + { + bpp = 1; + palette_size = 2; + } + else if (format == wxBMP_4BPP) + { + bpp = 4; + palette_size = 16; + } + else if ((format == wxBMP_8BPP) || (format == wxBMP_8BPP_GREY) || + (format == wxBMP_8BPP_RED) || (format == wxBMP_8BPP_PALETTE)) + { + // need to set a wxPalette to use this, HOW TO CHECK IF VALID, SIZE? + if ((format == wxBMP_8BPP_PALETTE) && !image->HasPalette()) + { + if (verbose) + wxLogError(_("BMP: wImage doesn't have own wxPalette.")); + return FALSE; + } + bpp = 8; + palette_size = 256; + } + else // you get 24bpp + { + format = wxBMP_24BPP; + bpp = 24; + palette_size = 0; + } + unsigned width = image->GetWidth(); - unsigned row_width = width * 3 + - (((width % 4) == 0) ? 0 : (4 - (width * 3) % 4)); - // each row must be aligned to dwords + unsigned row_padding = (4 - int(width*bpp/8.0) % 4) % 4; // # bytes to pad to dword + unsigned row_width = int(width * bpp/8.0) + row_padding; // # of bytes per row + struct { // BitmapHeader: @@ -78,7 +118,7 @@ bool wxBMPHandler::SaveFile(wxImage *image, wxUint32 filesize; // total file size, inc. headers wxUint32 reserved; // for future use wxUint32 data_offset; // image data offset in the file - + // BitmapInfoHeader: wxUint32 bih_size; // 2nd part's size wxUint32 width, height; // bitmap's dimensions @@ -90,26 +130,25 @@ bool wxBMPHandler::SaveFile(wxImage *image, wxUint32 num_clrs; // number of colors used wxUint32 num_signif_clrs;// number of significant colors } hdr; + wxUint32 hdr_size = 14/*BitmapHeader*/ + 40/*BitmapInfoHeader*/; hdr.magic = wxUINT16_SWAP_ON_BE(0x4D42/*'BM'*/); - hdr.filesize = wxUINT32_SWAP_ON_BE( - hdr_size + - row_width * image->GetHeight() - ); + hdr.filesize = wxUINT32_SWAP_ON_BE( hdr_size + palette_size*4 + + row_width * image->GetHeight() ); hdr.reserved = 0; - hdr.data_offset = wxUINT32_SWAP_ON_BE(hdr_size); - + hdr.data_offset = wxUINT32_SWAP_ON_BE(hdr_size + palette_size*4); + hdr.bih_size = wxUINT32_SWAP_ON_BE(hdr_size - 14); hdr.width = wxUINT32_SWAP_ON_BE(image->GetWidth()); hdr.height = wxUINT32_SWAP_ON_BE(image->GetHeight()); hdr.planes = wxUINT16_SWAP_ON_BE(1); // always 1 plane - hdr.bpp = wxUINT16_SWAP_ON_BE(24); // always TrueColor + hdr.bpp = wxUINT16_SWAP_ON_BE(bpp); hdr.compression = 0; // RGB uncompressed - hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight()); - hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard - hdr.num_clrs = 0; // maximal possible = 2^24 - hdr.num_signif_clrs = 0; // all colors are significant + hdr.size_of_bmp = wxUINT32_SWAP_ON_BE(row_width * image->GetHeight()); + hdr.h_res = hdr.v_res = wxUINT32_SWAP_ON_BE(72); // 72dpi is standard + hdr.num_clrs = wxUINT32_SWAP_ON_BE(palette_size); // # colors in colormap + hdr.num_signif_clrs = 0; // all colors are significant if (// VS: looks ugly but compilers tend to do ugly things with structs, // like aligning hdr.filesize's ofset to dword :( @@ -129,45 +168,199 @@ bool wxBMPHandler::SaveFile(wxImage *image, !stream.Write(&hdr.v_res, 4) || !stream.Write(&hdr.num_clrs, 4) || !stream.Write(&hdr.num_signif_clrs, 4) - ) + ) { if (verbose) wxLogError(_("BMP: Couldn't write the file header.")); return FALSE; } + wxPalette *palette = NULL; // entries for quantized images + wxUint8 *rgbquad = NULL; // for the RGBQUAD bytes for the colormap + wxImage *q_image = NULL; // destination for quantized image + + // if <24bpp use quantization to reduce colors for *some* of the formats + if ( (format == wxBMP_1BPP) || (format == wxBMP_4BPP) || + (format == wxBMP_8BPP) || (format == wxBMP_8BPP_PALETTE)) + { + // make a new palette and quantize the image + if (format != wxBMP_8BPP_PALETTE) + { + q_image = new wxImage(); + + // I get a delete error using Quantize when desired colors > 236 + int quantize = ((palette_size > 236) ? 236 : palette_size); + // fill the destination too, it gives much nicer 4bpp images + wxQuantize::Quantize( *image, *q_image, &palette, quantize, 0, + wxQUANTIZE_FILL_DESTINATION_IMAGE ); + } + else + { + palette = new wxPalette(image->GetPalette()); + } + + int i; + unsigned char r, g, b; + rgbquad = new wxUint8 [palette_size*4]; + + for (i=0; iGetRGB( i, &r, &g, &b )) r = g = b = 0; + + rgbquad[i*4] = b; + rgbquad[i*4+1] = g; + rgbquad[i*4+2] = r; + rgbquad[i*4+3] = 0; + } + } + // make a 256 entry greyscale colormap or 2 entry black & white + else if ((format == wxBMP_8BPP_GREY) || (format == wxBMP_8BPP_RED) || + (format == wxBMP_1BPP_BW)) + { + int i; + rgbquad = new wxUint8 [palette_size*4]; + + for (i=0; i 0) && (format == wxBMP_1BPP_BW)) i = 255; + rgbquad[i*4] = i; + rgbquad[i*4+1] = i; + rgbquad[i*4+2] = i; + rgbquad[i*4+3] = 0; + } + } + + // if the colormap was made, then it needs to be written + if (rgbquad) + { + if (!stream.Write(rgbquad, palette_size*4)) + { + if (verbose) wxLogError(_("BMP: Couldn't write RGB color map.")); + delete []rgbquad; + if (palette) delete palette; + if (q_image) delete q_image; + return FALSE; + } + delete []rgbquad; + } + + // pointer to the image data, use quantized if available wxUint8 *data = (wxUint8*) image->GetData(); + if (q_image) if (q_image->Ok()) data = (wxUint8*) q_image->GetData(); + wxUint8 *buffer = new wxUint8[row_width]; - wxUint8 tmpvar; memset(buffer, 0, row_width); int y; unsigned x; + long int pixel; for (y = image->GetHeight() -1 ; y >= 0; y--) { - memcpy(buffer, data + y * 3 * width, 3 * width); - for (x = 0; x < width; x++) + if (format == wxBMP_24BPP) // 3 bytes per pixel red,green,blue + { + for (x = 0; x < width; x++) + { + pixel = 3*(y*width + x); + + buffer[3*x ] = data[pixel+2]; + buffer[3*x + 1] = data[pixel+1]; + buffer[3*x + 2] = data[pixel]; + } + } + else if ((format == wxBMP_8BPP) || // 1 byte per pixel in color + (format == wxBMP_8BPP_PALETTE)) + { + for (x = 0; x < width; x++) + { + pixel = 3*(y*width + x); + buffer[x] = palette->GetPixel( data[pixel], + data[pixel+1], + data[pixel+2] ); + } + } + else if (format == wxBMP_8BPP_GREY) // 1 byte per pix, rgb ave to grey + { + for (x = 0; x < width; x++) + { + pixel = 3*(y*width + x); + buffer[x] = (wxUint8)(.299*data[pixel] + + .587*data[pixel+1] + + .114*data[pixel+2]); + } + } + else if (format == wxBMP_8BPP_RED) // 1 byte per pixel, red as greys + { + for (x = 0; x < width; x++) + { + buffer[x] = (wxUint8)data[3*(y*width + x)]; + } + } + else if (format == wxBMP_4BPP) // 4 bpp in color { - tmpvar = buffer[3 * x + 0]; - buffer[3 * x + 0] = buffer[3 * x + 2]; - buffer[3 * x + 2] = tmpvar; + for (x = 0; x < width; x+=2) + { + pixel = 3*(y*width + x); + + // fill buffer, ignore if > width + buffer[x/2] = + ((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 4) | + (((x+1) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], data[pixel+5]) )); + } } - + else if (format == wxBMP_1BPP) // 1 bpp in "color" + { + for (x = 0; x < width; x+=8) + { + pixel = 3*(y*width + x); + + buffer[x/8] = + ((wxUint8)palette->GetPixel(data[pixel], data[pixel+1], data[pixel+2]) << 7) | + (((x+1) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+3], data[pixel+4], data[pixel+5]) << 6)) | + (((x+2) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+6], data[pixel+7], data[pixel+8]) << 5)) | + (((x+3) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+9], data[pixel+10], data[pixel+11]) << 4)) | + (((x+4) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+12], data[pixel+13], data[pixel+14]) << 3)) | + (((x+5) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+15], data[pixel+16], data[pixel+17]) << 2)) | + (((x+6) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+18], data[pixel+19], data[pixel+20]) << 1)) | + (((x+7) > width) ? 0 : ((wxUint8)palette->GetPixel(data[pixel+21], data[pixel+22], data[pixel+23]) )); + } + } + else if (format == wxBMP_1BPP_BW) // 1 bpp B&W colormap from red color ONLY + { + for (x = 0; x < width; x+=8) + { + pixel = 3*(y*width + x); + + buffer[x/8] = + (((wxUint8)(data[pixel] /128.)) << 7) | + ( ((x+1) > width) ? 0 : (((wxUint8)(data[pixel+3] /128.)) << 6)) | + ( ((x+2) > width) ? 0 : (((wxUint8)(data[pixel+6] /128.)) << 5)) | + ( ((x+3) > width) ? 0 : (((wxUint8)(data[pixel+9] /128.)) << 4)) | + ( ((x+4) > width) ? 0 : (((wxUint8)(data[pixel+12]/128.)) << 3)) | + ( ((x+5) > width) ? 0 : (((wxUint8)(data[pixel+15]/128.)) << 2)) | + ( ((x+6) > width) ? 0 : (((wxUint8)(data[pixel+18]/128.)) << 1)) | + ( ((x+7) > width) ? 0 : (((wxUint8)(data[pixel+21]/128.)) )); + } + } + if (!stream.Write(buffer, row_width)) { if (verbose) wxLogError(_("BMP: Couldn't write data.")); delete[] buffer; + if (palette) delete palette; + if (q_image) delete q_image; return FALSE; } } delete[] buffer; + if (palette) delete palette; + if (q_image) delete q_image; return TRUE; } - #ifndef BI_RGB #define BI_RGB 0 #define BI_RLE8 1 @@ -185,8 +378,8 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose int rshift = 0, gshift = 0, bshift = 0; wxUint8 aByte; wxUint16 aWord; - wxInt32 dbuf[4], aDword, - rmask = 0, gmask = 0, bmask = 0; + wxInt32 dbuf[4]; + wxInt32 aDword, rmask = 0, gmask = 0, bmask = 0; wxInt8 bbuf[4]; struct _cmap { unsigned char r, g, b; @@ -201,7 +394,7 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose * Read the BMP header */ - stream.Read( &bbuf, 2 ); + stream.Read( bbuf, 2 ); stream.Read( dbuf, 4 * 4 ); #if 0 // unused @@ -487,7 +680,7 @@ bool wxBMPHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose } else if (bpp == 24) { - stream.Read( &bbuf, 3 ); + stream.Read( bbuf, 3 ); linepos += 3; ptr[poffset ] = (unsigned char)bbuf[2]; ptr[poffset + 1] = (unsigned char)bbuf[1]; @@ -543,7 +736,7 @@ bool wxBMPHandler::DoCanRead( wxInputStream& stream ) { unsigned char hdr[2]; - stream.Read(&hdr, 2); + stream.Read(hdr, 2); stream.SeekI(-2, wxFromCurrent); return (hdr[0] == 'B' && hdr[1] == 'M'); }