diff options
Diffstat (limited to 'src/frontend/mame/ui/icorender.h')
-rw-r--r-- | src/frontend/mame/ui/icorender.h | 227 |
1 files changed, 14 insertions, 213 deletions
diff --git a/src/frontend/mame/ui/icorender.h b/src/frontend/mame/ui/icorender.h index 17bc5a1d8ea..bb3f1a083be 100644 --- a/src/frontend/mame/ui/icorender.h +++ b/src/frontend/mame/ui/icorender.h @@ -1,13 +1,13 @@ // license:BSD-3-Clause -// copyright-holders:Maurizio Petrarota, Victor Laskin +// copyright-holders:Vas Crabb /*************************************************************************** ui/icorender.h - ICOns file loader. + Windows icon file parser. - Original code by Victor Laskin (victor.laskin@gmail.com) - http://vitiy.info/Code/ico.cpp + File handles passed to these functions must support read and seek + operations. ***************************************************************************/ #ifndef MAME_FRONTEND_MAME_UI_ICORENDER_H @@ -15,219 +15,20 @@ #pragma once -// These next two structs represent how the icon information is stored -// in an ICO file. -typedef struct -{ - uint8_t bWidth; // Width of the image - uint8_t bHeight; // Height of the image (times 2) - uint8_t bColorCount; // Number of colors in image (0 if >=8bpp) - uint8_t bReserved; // Reserved - uint16_t wPlanes; // Color Planes - uint16_t wBitCount; // Bits per pixel - uint32_t dwBytesInRes; // how many bytes in this resource? - uint32_t dwImageOffset; // where in the file is this image -} ICONDIRENTRY, *LPICONDIRENTRY; +namespace ui { -typedef struct -{ - uint16_t idReserved; // Reserved - uint16_t idType; // resource type (1 for icons) - uint16_t idCount; // how many images? - //ICONDIRENTRY idEntries[1]; // the entries for each image -} ICONDIR, *LPICONDIR; +// get number of images in icon file (-1 on error) +int images_in_ico(util::core_file &fp); -// size - 40 bytes -typedef struct { - uint32_t biSize; - uint32_t biWidth; - uint32_t biHeight; // Icon Height (added height of XOR-Bitmap and AND-Bitmap) - uint16_t biPlanes; - uint16_t biBitCount; - uint32_t biCompression; - int32_t biSizeImage; - uint32_t biXPelsPerMeter; - uint32_t biYPelsPerMeter; - uint32_t biClrUsed; - uint32_t biClrImportant; -} s_BITMAPINFOHEADER, *s_PBITMAPINFOHEADER; +// load specified icon from file (zero-based) +void render_load_ico(util::core_file &fp, unsigned index, bitmap_argb32 &bitmap); -// 46 bytes -typedef struct{ - s_BITMAPINFOHEADER icHeader; // DIB header - uint32_t icColors[1]; // Color table (short 4 bytes) //RGBQUAD - uint8_t icXOR[1]; // DIB bits for XOR mask - uint8_t icAND[1]; // DIB bits for AND mask -} ICONIMAGE, *LPICONIMAGE; +// load first supported icon from file +void render_load_ico_first(util::core_file &fp, bitmap_argb32 &bitmap); -//------------------------------------------------- -// load an ICO file into a bitmap -//------------------------------------------------- +// load highest detail supported icon from file +void render_load_ico_highest_detail(util::core_file &fp, bitmap_argb32 &bitmap); -inline void render_load_ico(bitmap_argb32 &bitmap, emu_file &file, const char *dirname, const char *filename) -{ - int32_t width = 0; - int32_t height = 0; - - // deallocate previous bitmap - bitmap.reset(); - - // define file's full name - std::string fname; - - if (!dirname) - fname = filename; - else - fname.assign(dirname).append(PATH_SEPARATOR).append(filename); - - osd_file::error filerr = file.open(fname.c_str()); - - if (filerr != osd_file::error::NONE) - return; - - // allocates a buffer for the image - uint64_t size = file.size(); - uint8_t *buffer = global_alloc_array(uint8_t, size + 1); - - // read data from the file and set them in the buffer - file.read(buffer, size); - - LPICONDIR icoDir = (LPICONDIR)buffer; - int iconsCount = icoDir->idCount; - - if (icoDir->idReserved != 0 || icoDir->idType != 1 || iconsCount == 0 || iconsCount > 20) - { - file.close(); - global_free_array(buffer); - return; - } - - uint8_t* cursor = buffer; - cursor += 6; - ICONDIRENTRY* dirEntry = (ICONDIRENTRY*)(cursor); - int maxSize = 0; - int offset = 0; - int maxBitCount = 0; - for (int i = 0; i < iconsCount; i++, ++dirEntry) - { - int w = dirEntry->bWidth; - int h = dirEntry->bHeight; - int bitCount = dirEntry->wBitCount; - if (w * h > maxSize || bitCount > maxBitCount) // we choose icon with max resolution - { - width = w; - height = h; - offset = dirEntry->dwImageOffset; - maxSize = w * h; - } - } - - if (offset == 0) return; - - cursor = buffer; - cursor += offset; - ICONIMAGE* icon = (ICONIMAGE*)(cursor); - int realBitsCount = (int)icon->icHeader.biBitCount; - bool hasAndMask = (realBitsCount < 32) && (height != icon->icHeader.biHeight); - - cursor += 40; - bitmap.allocate(width, height); - - // rgba + vertical swap - if (realBitsCount >= 32) - { - for (int x = 0; x < width; ++x) - for (int y = 0; y < height; ++y) - { - int shift2 = 4 * (x + (height - y - 1) * width); - bitmap.pix32(y, x) = rgb_t(cursor[shift2 + 3], cursor[shift2 + 2], cursor[shift2 + 1], cursor[shift2]); - } - } - else if (realBitsCount == 24) - for (int x = 0; x < width; ++x) - for (int y = 0; y < height; ++y) - { - int shift2 = 3 * (x + (height - y - 1) * width); - bitmap.pix32(y, x) = rgb_t(255, cursor[shift2 + 2], cursor[shift2 + 1], cursor[shift2]); - } - else if (realBitsCount == 8) // 256 colors - { - // 256 color table - uint8_t *colors = cursor; - cursor += 256 * 4; - for (int x = 0; x < width; ++x) - for (int y = 0; y < height; ++y) - { - int shift2 = (x + (height - y - 1) * width); - int index = 4 * cursor[shift2]; - bitmap.pix32(y, x) = rgb_t(255, colors[index + 2], colors[index + 1], colors[index]); - } - } - else if (realBitsCount == 4) // 16 colors - { - // 16 color table - uint8_t *colors = cursor; - cursor += 16 * 4; - for (int x = 0; x < width; ++x) - for (int y = 0; y < height; ++y) - { - int shift2 = (x + (height - y - 1) * width); - uint8_t index = cursor[shift2 / 2]; - if (shift2 % 2 == 0) - index = (index >> 4) & 0xF; - else - index = index & 0xF; - index *= 4; - bitmap.pix32(y, x) = rgb_t(255, colors[index + 2], colors[index + 1], colors[index]); - } - } - else if (realBitsCount == 1) // 2 colors - { - // 2 color table - uint8_t *colors = cursor; - cursor += 2 * 4; - int boundary = width; // !!! 32 bit boundary (http://www.daubnet.com/en/file-format-ico) - while (boundary % 32 != 0) boundary++; - - for (int x = 0; x < width; ++x) - for (int y = 0; y < height; ++y) - { - int shift2 = (x + (height - y - 1) * boundary); - uint8_t index = cursor[shift2 / 8]; - - // select 1 bit only - uint8_t bit = 7 - (x % 8); - index = (index >> bit) & 0x01; - index *= 4; - bitmap.pix32(y, x) = rgb_t(255, colors[index + 2], colors[index + 1], colors[index]); - } - } - - // Read AND mask after base color data - 1 BIT MASK - if (hasAndMask) - { - int boundary = width * realBitsCount; // !!! 32 bit boundary (http://www.daubnet.com/en/file-format-ico) - while (boundary % 32 != 0) boundary++; - cursor += boundary * height / 8; - - boundary = width; - while (boundary % 32 != 0) boundary++; - - for (int y = 0; y < height; ++y) - for (int x = 0; x < width; ++x) - { - uint8_t bit = 7 - (x % 8); - int shift2 = (x + (height - y - 1) * boundary) / 8; - int mask = (0x01 & ((uint8_t)cursor[shift2] >> bit)); - rgb_t colors = bitmap.pix32(y, x); - uint8_t alpha = colors.a(); - alpha *= 1 - mask; - colors.set_a(alpha); - bitmap.pix32(y, x) = colors; - } - } - file.close(); - global_free_array(buffer); -} +} // namespace ui #endif // MAME_FRONTEND_MAME_UI_ICORENDER_H |