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LibGfx: Consolidate some types in the PNG decoder

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This commit is contained in:
Andreas Kling 2020-06-02 16:55:55 +02:00
parent 6c89303e7e
commit 19587934f3
Notes: sideshowbarker 2024-07-19 05:53:08 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/19587934f33
1 changed files with 19 additions and 33 deletions
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52
Libraries/LibGfx/PNGLoader.cpp
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@ -68,38 +68,28 @@ struct [[gnu::packed]] PaletteEntry
//u8 a;
};
template<typename T>
struct [[gnu::packed]] Tuple
{
u8 gray;
u8 a;
};
struct [[gnu::packed]] Tuple16
{
u16 gray;
u16 a;
T gray;
T a;
};
template<typename T>
struct [[gnu::packed]] Triplet
{
u8 r;
u8 g;
u8 b;
T r;
T g;
T b;
};
struct [[gnu::packed]] Triplet16
template<typename T>
struct [[gnu::packed]] Quad
{
u16 r;
u16 g;
u16 b;
};
struct [[gnu::packed]] Quad16
{
u16 r;
u16 g;
u16 b;
u16 a;
T r;
T g;
T b;
T a;
};
struct PNGLoadingContext {
@ -136,9 +126,7 @@ struct PNGLoadingContext {
class Streamer {
public:
Streamer(const u8* data, int size)
: m_original_data(data)
, m_original_size(size)
, m_data_ptr(data)
: m_data_ptr(data)
, m_size_remaining(size)
{
}
@ -177,8 +165,6 @@ public:
bool at_end() const { return !m_size_remaining; }
private:
const u8* m_original_data;
int m_original_size;
const u8* m_data_ptr;
int m_size_remaining;
};
@ -362,7 +348,7 @@ NEVER_INLINE FLATTEN static void unfilter(PNGLoadingContext& context)
case 4:
if (context.bit_depth == 8) {
for (int y = 0; y < context.height; ++y) {
auto* tuples = (Tuple*)context.scanlines[y].data.data();
auto* tuples = (Tuple<u8>*)context.scanlines[y].data.data();
for (int i = 0; i < context.width; ++i) {
auto& pixel = (Pixel&)context.bitmap->scanline(y)[i];
pixel.r = tuples[i].gray;
@ -373,7 +359,7 @@ NEVER_INLINE FLATTEN static void unfilter(PNGLoadingContext& context)
}
} else if (context.bit_depth == 16) {
for (int y = 0; y < context.height; ++y) {
auto* tuples = (Tuple16*)context.scanlines[y].data.data();
auto* tuples = (Tuple<u16>*)context.scanlines[y].data.data();
for (int i = 0; i < context.width; ++i) {
auto& pixel = (Pixel&)context.bitmap->scanline(y)[i];
pixel.r = tuples[i].gray & 0xFF;
@ -389,7 +375,7 @@ NEVER_INLINE FLATTEN static void unfilter(PNGLoadingContext& context)
case 2:
if (context.bit_depth == 8) {
for (int y = 0; y < context.height; ++y) {
auto* triplets = (Triplet*)context.scanlines[y].data.data();
auto* triplets = (Triplet<u8>*)context.scanlines[y].data.data();
for (int i = 0; i < context.width; ++i) {
auto& pixel = (Pixel&)context.bitmap->scanline(y)[i];
pixel.r = triplets[i].r;
@ -400,7 +386,7 @@ NEVER_INLINE FLATTEN static void unfilter(PNGLoadingContext& context)
}
} else if (context.bit_depth == 16) {
for (int y = 0; y < context.height; ++y) {
auto* triplets = (Triplet16*)context.scanlines[y].data.data();
auto* triplets = (Triplet<u16>*)context.scanlines[y].data.data();
for (int i = 0; i < context.width; ++i) {
auto& pixel = (Pixel&)context.bitmap->scanline(y)[i];
pixel.r = triplets[i].r & 0xFF;
@ -420,7 +406,7 @@ NEVER_INLINE FLATTEN static void unfilter(PNGLoadingContext& context)
}
} else if (context.bit_depth == 16) {
for (int y = 0; y < context.height; ++y) {
auto* triplets = (Quad16*)context.scanlines[y].data.data();
auto* triplets = (Quad<u16>*)context.scanlines[y].data.data();
for (int i = 0; i < context.width; ++i) {
auto& pixel = (Pixel&)context.bitmap->scanline(y)[i];
pixel.r = triplets[i].r & 0xFF;