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improve image and pixel_buffer

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This commit is contained in:
Jinhao
2015-10-17 14:42:07 +08:00
parent 8f59ccfbf6
commit 7f4cc3f6d9
13 changed files with 216 additions and 266 deletions
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57
source/paint/pixel_buffer.cpp
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@@ -611,6 +611,63 @@ namespace nana{ namespace paint
return reinterpret_cast<pixel_color_t*>(reinterpret_cast<char*>(sp->raw_pixel_buffer) + sp->bytes_per_line * row);
}
void pixel_buffer::fill_row(std::size_t row, const unsigned char* buffer, std::size_t bytes, unsigned bits_per_pixel)
{
auto sp = storage_.get();
if (!sp)
return;
auto row_ptr = sp->raw_pixel_buffer + sp->pixel_size.width * row;
//the number of pixels will be copied
auto const px_count = (sp->pixel_size.width <= (bytes / (bits_per_pixel / 8)) ? sp->pixel_size.width : (bytes / (bits_per_pixel / 8)));
if (32 == bits_per_pixel)
{
std::memcpy(row_ptr, buffer, px_count * 4);
}
else if (24 == bits_per_pixel)
{
for (auto p = row_ptr, end = row_ptr + px_count; p != end; ++p)
{
p->element.red = buffer[0];
p->element.green = buffer[1];
p->element.blue = buffer[2];
buffer += 3;
}
}
else if (16 == bits_per_pixel)
{
unsigned char palette[32];
for (std::size_t i = 0; i < 32; ++i)
palette[i] = static_cast<unsigned char>(i * 255 / 31);
#if defined(NANA_X11)
unsigned char palette_6bits[64];
for (std::size_t i = 0; i < 64; ++i)
palette_6bits[i] = static_cast<unsigned char>(i * 255 / 63);
#endif
auto px = reinterpret_cast<const unsigned short*>(buffer);
for (auto p = row_ptr, end = row_ptr + px_count; p != end; ++p)
{
p->element.red = palette[(*px >> 11) & 0x1F];
//16-bits RGB format under X is 565, under Windows is 555
#if defined(NANA_X11)
p->element.green = palette_6bits[(*px >> 5) & 0x3F];
p->element.blue = palette_[*px & 0x1F];
#else
p->element.green = palette[(*px >> 6) & 0x1F];
p->element.blue = palette[(*px >> 1) & 0x1F];
#endif
++px;
}
}
}
void pixel_buffer::put(const unsigned char* rawbits, std::size_t width, std::size_t height, std::size_t bits_per_pixel, std::size_t bytes_per_line, bool is_negative)
{
if(storage_)