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path: root/core/fxge/dib/cstretchengine.cpp
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Diffstat (limited to 'core/fxge/dib/cstretchengine.cpp')
-rw-r--r--core/fxge/dib/cstretchengine.cpp121
1 files changed, 59 insertions, 62 deletions
diff --git a/core/fxge/dib/cstretchengine.cpp b/core/fxge/dib/cstretchengine.cpp
index 2915202daf..b7aa672a46 100644
--- a/core/fxge/dib/cstretchengine.cpp
+++ b/core/fxge/dib/cstretchengine.cpp
@@ -19,6 +19,10 @@ namespace {
const int kMaxDestValue = 16711680;
+int GetPitchRoundUpTo4Bytes(int bits_per_pixel) {
+ return (bits_per_pixel + 31) / 32 * 4;
+}
+
} // namespace
CStretchEngine::CWeightTable::CWeightTable()
@@ -223,17 +227,19 @@ CStretchEngine::CStretchEngine(ScanlineComposerIface* pDestBitmap,
int dest_height,
const FX_RECT& clip_rect,
const RetainPtr<CFX_DIBSource>& pSrcBitmap,
- int flags) {
- m_State = 0;
- m_DestFormat = dest_format;
- m_DestBpp = dest_format & 0xff;
- m_SrcBpp = pSrcBitmap->GetFormat() & 0xff;
- m_bHasAlpha = pSrcBitmap->GetFormat() & 0x200;
- m_pSrcPalette = pSrcBitmap->GetPalette();
- m_pDestBitmap = pDestBitmap;
- m_DestWidth = dest_width;
- m_DestHeight = dest_height;
- m_DestClip = clip_rect;
+ int flags)
+ : m_DestFormat(dest_format),
+ m_DestBpp(dest_format & 0xff),
+ m_SrcBpp(pSrcBitmap->GetFormat() & 0xff),
+ m_bHasAlpha(pSrcBitmap->GetFormat() & 0x200),
+ m_pSource(pSrcBitmap),
+ m_pSrcPalette(pSrcBitmap->GetPalette()),
+ m_SrcWidth(pSrcBitmap->GetWidth()),
+ m_SrcHeight(pSrcBitmap->GetHeight()),
+ m_pDestBitmap(pDestBitmap),
+ m_DestWidth(dest_width),
+ m_DestHeight(dest_height),
+ m_DestClip(clip_rect) {
uint32_t size = clip_rect.Width();
if (size && m_DestBpp > static_cast<int>(INT_MAX / size))
return;
@@ -242,17 +248,12 @@ CStretchEngine::CStretchEngine(ScanlineComposerIface* pDestBitmap,
if (size > INT_MAX - 31)
return;
- size += 31;
- size = size / 32 * 4;
+ size = GetPitchRoundUpTo4Bytes(size);
m_DestScanline.resize(size);
if (dest_format == FXDIB_Rgb32)
std::fill(m_DestScanline.begin(), m_DestScanline.end(), 255);
- m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
- m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
- m_pSource = pSrcBitmap;
- m_SrcWidth = pSrcBitmap->GetWidth();
- m_SrcHeight = pSrcBitmap->GetHeight();
- m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
+ m_InterPitch = GetPitchRoundUpTo4Bytes(m_DestClip.Width() * m_DestBpp);
+ m_ExtraMaskPitch = GetPitchRoundUpTo4Bytes(m_DestClip.Width() * 8);
if ((flags & FXDIB_NOSMOOTH) == 0) {
bool bInterpol = flags & FXDIB_INTERPOL || flags & FXDIB_BICUBIC_INTERPOL;
if (!bInterpol && abs(dest_width) != 0 &&
@@ -284,39 +285,36 @@ CStretchEngine::CStretchEngine(ScanlineComposerIface* pDestBitmap,
m_SrcClip.bottom = static_cast<int>(ceil(src_bottom));
FX_RECT src_rect(0, 0, m_SrcWidth, m_SrcHeight);
m_SrcClip.Intersect(src_rect);
- if (m_SrcBpp == 1) {
- if (m_DestBpp == 8)
- m_TransMethod = 1;
- else
- m_TransMethod = 2;
- } else if (m_SrcBpp == 8) {
- if (m_DestBpp == 8) {
- if (!m_bHasAlpha)
- m_TransMethod = 3;
- else
- m_TransMethod = 4;
- } else {
- if (!m_bHasAlpha)
- m_TransMethod = 5;
- else
- m_TransMethod = 6;
- }
- } else {
- if (!m_bHasAlpha)
- m_TransMethod = 7;
- else
- m_TransMethod = 8;
+
+ switch (m_SrcBpp) {
+ case 1:
+ m_TransMethod = m_DestBpp == 8 ? TransformMethod::k1BppTo8Bpp
+ : TransformMethod::k1BppToManyBpp;
+ break;
+ case 8:
+ if (m_DestBpp == 8) {
+ m_TransMethod = m_bHasAlpha ? TransformMethod::k8BppTo8BppWithAlpha
+ : TransformMethod::k8BppTo8Bpp;
+ } else {
+ m_TransMethod = m_bHasAlpha ? TransformMethod::k8BppToManyBppWithAlpha
+ : TransformMethod::k8BppToManyBpp;
+ }
+ break;
+ default:
+ m_TransMethod = m_bHasAlpha ? TransformMethod::kManyBpptoManyBppWithAlpha
+ : TransformMethod::kManyBpptoManyBpp;
+ break;
}
}
CStretchEngine::~CStretchEngine() {}
bool CStretchEngine::Continue(PauseIndicatorIface* pPause) {
- while (m_State == 1) {
+ while (m_State == State::kHorizontal) {
if (ContinueStretchHorz(pPause))
return true;
- m_State = 2;
+ m_State = State::kVertical;
StretchVert();
}
return false;
@@ -334,8 +332,7 @@ bool CStretchEngine::StartStretchHorz() {
m_InterBuf.resize(m_SrcClip.Height() * m_InterPitch);
if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) {
m_ExtraAlphaBuf.resize(m_SrcClip.Height(), m_ExtraMaskPitch);
- uint32_t size = (m_DestClip.Width() * 8 + 31) / 32 * 4;
- m_DestMaskScanline.resize(size);
+ m_DestMaskScanline.resize(m_ExtraMaskPitch);
}
bool ret =
m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right,
@@ -344,7 +341,7 @@ bool CStretchEngine::StartStretchHorz() {
return false;
m_CurRow = m_SrcClip.top;
- m_State = 1;
+ m_State = State::kHorizontal;
return true;
}
@@ -377,8 +374,8 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
// TODO(npm): reduce duplicated code here
switch (m_TransMethod) {
- case 1:
- case 2: {
+ case TransformMethod::k1BppTo8Bpp:
+ case TransformMethod::k1BppToManyBpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_a = 0;
@@ -397,7 +394,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 3: {
+ case TransformMethod::k8BppTo8Bpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_a = 0;
@@ -415,7 +412,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 4: {
+ case TransformMethod::k8BppTo8BppWithAlpha: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_a = 0;
@@ -439,7 +436,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 5: {
+ case TransformMethod::k8BppToManyBpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_r_y = 0;
@@ -473,7 +470,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 6: {
+ case TransformMethod::k8BppToManyBppWithAlpha: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_a = 0;
@@ -512,7 +509,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 7: {
+ case TransformMethod::kManyBpptoManyBpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_r_y = 0;
@@ -541,7 +538,7 @@ bool CStretchEngine::ContinueStretchHorz(PauseIndicatorIface* pPause) {
}
break;
}
- case 8: {
+ case TransformMethod::kManyBpptoManyBppWithAlpha: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
PixelWeight* pWeights = m_WeightTable.GetPixelWeight(col);
int dest_a = 0;
@@ -604,9 +601,9 @@ void CStretchEngine::StretchVert() {
unsigned char* dest_scan_mask = m_DestMaskScanline.data();
PixelWeight* pWeights = table.GetPixelWeight(row);
switch (m_TransMethod) {
- case 1:
- case 2:
- case 3: {
+ case TransformMethod::k1BppTo8Bpp:
+ case TransformMethod::k1BppToManyBpp:
+ case TransformMethod::k8BppTo8Bpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
unsigned char* src_scan =
m_InterBuf.data() + (col - m_DestClip.left) * DestBpp;
@@ -627,7 +624,7 @@ void CStretchEngine::StretchVert() {
}
break;
}
- case 4: {
+ case TransformMethod::k8BppTo8BppWithAlpha: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
unsigned char* src_scan =
m_InterBuf.data() + (col - m_DestClip.left) * DestBpp;
@@ -656,8 +653,8 @@ void CStretchEngine::StretchVert() {
}
break;
}
- case 5:
- case 7: {
+ case TransformMethod::k8BppToManyBpp:
+ case TransformMethod::kManyBpptoManyBpp: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
unsigned char* src_scan =
m_InterBuf.data() + (col - m_DestClip.left) * DestBpp;
@@ -688,8 +685,8 @@ void CStretchEngine::StretchVert() {
}
break;
}
- case 6:
- case 8: {
+ case TransformMethod::k8BppToManyBppWithAlpha:
+ case TransformMethod::kManyBpptoManyBppWithAlpha: {
for (int col = m_DestClip.left; col < m_DestClip.right; ++col) {
unsigned char* src_scan =
m_InterBuf.data() + (col - m_DestClip.left) * DestBpp;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-03 11:12:08 +0000