derek/gem5
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

base: Split out the pixel class in framebuffer.(cc|hh).

Browse Source 
These are really two separate things. Also, while it's realitively
straightforward to write a unit test for the pixel conversion code, the
framebuffer object is serializable and brings in more dependencies.

Change-Id: If954caeb0bfedb1002cfb1a7a115a00c90d56d19
Reviewed-on: https://gem5-review.googlesource.com/6341
Reviewed-by: Andreas Sandberg <andreas.sandberg@arm.com>
Maintainer: Andreas Sandberg <andreas.sandberg@arm.com>
This commit is contained in:
Gabe Black
2017-12-04 20:22:43 -08:00
parent 3017314d05
commit 7eb8d007a5
7 changed files with 334 additions and 240 deletions
Download Patch File Download Diff File Expand all files Collapse all files

61
src/base/framebuffer.cc
View File

@@ -41,71 +41,10 @@
#include <zlib.h>
#include <cassert>
#include "base/bitfield.hh"
const PixelConverter PixelConverter::rgba8888_le(4, 0, 8, 16, 8, 8, 8);
const PixelConverter PixelConverter::rgba8888_be(4, 0, 8, 16, 8, 8, 8,
BigEndianByteOrder);
const PixelConverter PixelConverter::rgb565_le(2, 0, 5, 11, 5, 6, 5);
const PixelConverter PixelConverter::rgb565_be(2, 0, 5, 11, 5, 6, 5,
BigEndianByteOrder);
const FrameBuffer FrameBuffer::dummy(320, 240);
PixelConverter::PixelConverter(unsigned _length,
unsigned ro, unsigned go, unsigned bo,
unsigned rw, unsigned gw, unsigned bw,
ByteOrder _byte_order)
: length(_length),
depth(rw + gw + bw),
byte_order(_byte_order),
ch_r(ro, rw),
ch_g(go, gw),
ch_b(bo, bw)
{
assert(length > 1);
}
PixelConverter::Channel::Channel(unsigned _offset, unsigned width)
: offset(_offset),
mask(::mask(width)),
factor(255.0 / mask)
{
}
uint32_t
PixelConverter::readWord(const uint8_t *p) const
{
uint32_t word(0);
if (byte_order == LittleEndianByteOrder) {
for (int i = 0; i < length; ++i)
word |= p[i] << (8 * i);
} else {
for (int i = 0; i < length; ++i)
word |= p[i] << (8 * (length - i - 1));
}
return word;
}
void
PixelConverter::writeWord(uint8_t *p, uint32_t word) const
{
if (byte_order == LittleEndianByteOrder) {
for (int i = 0; i < length; ++i)
p[i] = (word >> (8 * i)) & 0xFF;
} else {
for (int i = 0; i < length; ++i)
p[i] = (word >> (8 * (length - i - 1))) & 0xFF;
}
}
FrameBuffer::FrameBuffer(unsigned width, unsigned height)
: pixels(width * height),
_width(width), _height(height)