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LibGfx: Add BitmapFormat::RGBA8888

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This will be used by ImageData objects in LibWeb since the web spec
says these store colors in RGBA8888 order.

The only thing you can do with this format right now is blitting it
onto a BGRA8888 bitmap.
This commit is contained in:
Andreas Kling 2021-03-16 12:09:15 +01:00
parent 5023331726
commit fe861512c8
Notes: sideshowbarker 2024-07-18 21:18:34 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/fe861512c8a
3 changed files with 23 additions and 0 deletions
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1
Userland/Libraries/LibGfx/Bitmap.cpp
View File

@ -66,6 +66,7 @@ size_t Bitmap::minimum_pitch(size_t physical_width, BitmapFormat format)
break;
case StorageFormat::BGRx8888:
case StorageFormat::BGRA8888:
case StorageFormat::RGBA8888:
element_size = 4;
break;
default:

5
Userland/Libraries/LibGfx/Bitmap.h
View File

@ -54,6 +54,7 @@ enum class BitmapFormat {
Indexed8,
BGRx8888,
BGRA8888,
RGBA8888,
};
inline bool is_valid_bitmap_format(unsigned format)
@ -66,6 +67,7 @@ inline bool is_valid_bitmap_format(unsigned format)
case (unsigned)BitmapFormat::Indexed8:
case (unsigned)BitmapFormat::BGRx8888:
case (unsigned)BitmapFormat::BGRA8888:
case (unsigned)BitmapFormat::RGBA8888:
return true;
}
return false;
@ -75,6 +77,7 @@ enum class StorageFormat {
Indexed8,
BGRx8888,
BGRA8888,
RGBA8888,
};
static StorageFormat determine_storage_format(BitmapFormat format)
@ -84,6 +87,8 @@ static StorageFormat determine_storage_format(BitmapFormat format)
return StorageFormat::BGRx8888;
case BitmapFormat::BGRA8888:
return StorageFormat::BGRA8888;
case BitmapFormat::RGBA8888:
return StorageFormat::RGBA8888;
case BitmapFormat::Indexed1:
case BitmapFormat::Indexed2:
case BitmapFormat::Indexed4:

17
Userland/Libraries/LibGfx/Painter.cpp
View File

@ -770,6 +770,23 @@ void Painter::blit(const IntPoint& position, const Gfx::Bitmap& source, const In
return;
}
if (source.format() == BitmapFormat::RGBA8888) {
const u32* src = source.scanline(src_rect.top() + first_row) + src_rect.left() + first_column;
const size_t src_skip = source.pitch() / sizeof(u32);
for (int row = first_row; row <= last_row; ++row) {
for (int i = 0; i < clipped_rect.width(); ++i) {
u32 rgba = src[i];
u32 bgra = (rgba & 0xff00ff00)
| ((rgba & 0x000000ff) << 16)
| ((rgba & 0x00ff0000) >> 16);
dst[i] = bgra;
}
dst += dst_skip;
src += src_skip;
}
return;
}
if (Bitmap::is_indexed(source.format())) {
const u8* src = source.scanline_u8(src_rect.top() + first_row) + src_rect.left() + first_column;
const size_t src_skip = source.pitch();