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path: root/core/fxge/dib/fx_dib_engine.cpp
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Diffstat (limited to 'core/fxge/dib/fx_dib_engine.cpp')
-rw-r--r--core/fxge/dib/fx_dib_engine.cpp137
1 files changed, 70 insertions, 67 deletions
diff --git a/core/fxge/dib/fx_dib_engine.cpp b/core/fxge/dib/fx_dib_engine.cpp
index 4604f1fc0c..3bdff23f1e 100644
--- a/core/fxge/dib/fx_dib_engine.cpp
+++ b/core/fxge/dib/fx_dib_engine.cpp
@@ -6,12 +6,19 @@
#include <limits.h>
+#include <algorithm>
+
#include "core/fxge/dib/dib_int.h"
#include "core/fxge/include/fx_dib.h"
#include "core/fxge/include/fx_ge.h"
namespace {
+bool SourceSizeWithinLimit(int width, int height) {
+ const int kMaxProgressiveStretchPixels = 1000000;
+ return !height || width < kMaxProgressiveStretchPixels / height;
+}
+
FXDIB_Format GetStretchedFormat(const CFX_DIBSource& src) {
FXDIB_Format format = src.GetFormat();
if (format == FXDIB_1bppMask)
@@ -770,40 +777,36 @@ void CStretchEngine::StretchVert() {
}
}
-CFX_ImageStretcher::CFX_ImageStretcher()
- : m_pStretchEngine(nullptr),
- m_pScanline(nullptr),
- m_pMaskScanline(nullptr) {}
+CFX_ImageStretcher::CFX_ImageStretcher(IFX_ScanlineComposer* pDest,
+ const CFX_DIBSource* pSource,
+ int dest_width,
+ int dest_height,
+ const FX_RECT& bitmap_rect,
+ uint32_t flags)
+ : m_pDest(pDest),
+ m_pSource(pSource),
+ m_Flags(flags),
+ m_bFlipX(FALSE),
+ m_bFlipY(FALSE),
+ m_DestWidth(dest_width),
+ m_DestHeight(dest_height),
+ m_ClipRect(bitmap_rect),
+ m_DestFormat(GetStretchedFormat(*pSource)),
+ m_DestBPP(m_DestFormat & 0xff),
+ m_LineIndex(0) {}
CFX_ImageStretcher::~CFX_ImageStretcher() {
- FX_Free(m_pScanline);
- delete m_pStretchEngine;
- FX_Free(m_pMaskScanline);
}
-FX_BOOL CFX_ImageStretcher::Start(IFX_ScanlineComposer* pDest,
- const CFX_DIBSource* pSource,
- int dest_width,
- int dest_height,
- const FX_RECT& rect,
- uint32_t flags) {
- if (dest_width == 0 || dest_height == 0)
+FX_BOOL CFX_ImageStretcher::Start() {
+ if (m_DestWidth == 0 || m_DestHeight == 0)
return FALSE;
- m_DestFormat = GetStretchedFormat(*pSource);
- m_DestBPP = m_DestFormat & 0xff;
- m_pDest = pDest;
- m_pSource = pSource;
- m_DestWidth = dest_width;
- m_DestHeight = dest_height;
- m_ClipRect = rect;
- m_Flags = flags;
-
- if (pSource->GetFormat() == FXDIB_1bppRgb && pSource->GetPalette()) {
+ if (m_pSource->GetFormat() == FXDIB_1bppRgb && m_pSource->GetPalette()) {
FX_ARGB pal[256];
int a0, r0, g0, b0, a1, r1, g1, b1;
- ArgbDecode(pSource->GetPaletteEntry(0), a0, r0, g0, b0);
- ArgbDecode(pSource->GetPaletteEntry(1), a1, r1, g1, b1);
+ ArgbDecode(m_pSource->GetPaletteEntry(0), a0, r0, g0, b0);
+ ArgbDecode(m_pSource->GetPaletteEntry(1), a1, r1, g1, b1);
for (int i = 0; i < 256; i++) {
int a = a0 + (a1 - a0) * i / 255;
int r = r0 + (r1 - r0) * i / 255;
@@ -811,14 +814,16 @@ FX_BOOL CFX_ImageStretcher::Start(IFX_ScanlineComposer* pDest,
int b = b0 + (b1 - b0) * i / 255;
pal[i] = ArgbEncode(a, r, g, b);
}
- if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
+ if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(), m_DestFormat,
+ pal)) {
return FALSE;
}
- } else if (pSource->GetFormat() == FXDIB_1bppCmyk && pSource->GetPalette()) {
+ } else if (m_pSource->GetFormat() == FXDIB_1bppCmyk &&
+ m_pSource->GetPalette()) {
FX_CMYK pal[256];
int c0, m0, y0, k0, c1, m1, y1, k1;
- CmykDecode(pSource->GetPaletteEntry(0), c0, m0, y0, k0);
- CmykDecode(pSource->GetPaletteEntry(1), c1, m1, y1, k1);
+ CmykDecode(m_pSource->GetPaletteEntry(0), c0, m0, y0, k0);
+ CmykDecode(m_pSource->GetPaletteEntry(1), c1, m1, y1, k1);
for (int i = 0; i < 256; i++) {
int c = c0 + (c1 - c0) * i / 255;
int m = m0 + (m1 - m0) * i / 255;
@@ -826,14 +831,16 @@ FX_BOOL CFX_ImageStretcher::Start(IFX_ScanlineComposer* pDest,
int k = k0 + (k1 - k0) * i / 255;
pal[i] = CmykEncode(c, m, y, k);
}
- if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
+ if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(), m_DestFormat,
+ pal)) {
return FALSE;
}
- } else if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, NULL)) {
+ } else if (!m_pDest->SetInfo(m_ClipRect.Width(), m_ClipRect.Height(),
+ m_DestFormat, nullptr)) {
return FALSE;
}
- if (flags & FXDIB_DOWNSAMPLE)
+ if (m_Flags & FXDIB_DOWNSAMPLE)
return StartQuickStretch();
return StartStretch();
}
@@ -844,25 +851,23 @@ FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause) {
return ContinueStretch(pPause);
}
-#define MAX_PROGRESSIVE_STRETCH_PIXELS 1000000
FX_BOOL CFX_ImageStretcher::StartStretch() {
- m_pStretchEngine =
- new CStretchEngine(m_pDest, m_DestFormat, m_DestWidth, m_DestHeight,
- m_ClipRect, m_pSource, m_Flags);
+ m_pStretchEngine.reset(new CStretchEngine(m_pDest, m_DestFormat, m_DestWidth,
+ m_DestHeight, m_ClipRect, m_pSource,
+ m_Flags));
m_pStretchEngine->StartStretchHorz();
- if (m_pSource->GetWidth() * m_pSource->GetHeight() <
- MAX_PROGRESSIVE_STRETCH_PIXELS) {
- m_pStretchEngine->Continue(NULL);
+ if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) {
+ m_pStretchEngine->Continue(nullptr);
return FALSE;
}
return TRUE;
}
+
FX_BOOL CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause) {
return m_pStretchEngine && m_pStretchEngine->Continue(pPause);
}
+
FX_BOOL CFX_ImageStretcher::StartQuickStretch() {
- m_bFlipX = FALSE;
- m_bFlipY = FALSE;
if (m_DestWidth < 0) {
m_bFlipX = TRUE;
m_DestWidth = -m_DestWidth;
@@ -871,31 +876,32 @@ FX_BOOL CFX_ImageStretcher::StartQuickStretch() {
m_bFlipY = TRUE;
m_DestHeight = -m_DestHeight;
}
- m_LineIndex = 0;
uint32_t size = m_ClipRect.Width();
if (size && m_DestBPP > (int)(INT_MAX / size)) {
return FALSE;
}
size *= m_DestBPP;
- m_pScanline = FX_Alloc(uint8_t, (size / 8 + 3) / 4 * 4);
- if (m_pSource->m_pAlphaMask) {
- m_pMaskScanline = FX_Alloc(uint8_t, (m_ClipRect.Width() + 3) / 4 * 4);
- }
- if (m_pSource->GetWidth() * m_pSource->GetHeight() <
- MAX_PROGRESSIVE_STRETCH_PIXELS) {
- ContinueQuickStretch(NULL);
+ m_pScanline.reset(FX_Alloc(uint8_t, (size / 8 + 3) / 4 * 4));
+ if (m_pSource->m_pAlphaMask)
+ m_pMaskScanline.reset(FX_Alloc(uint8_t, (m_ClipRect.Width() + 3) / 4 * 4));
+
+ if (SourceSizeWithinLimit(m_pSource->GetWidth(), m_pSource->GetHeight())) {
+ ContinueQuickStretch(nullptr);
return FALSE;
}
return TRUE;
}
+
FX_BOOL CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause) {
- if (!m_pScanline) {
+ if (!m_pScanline)
return FALSE;
- }
- int result_width = m_ClipRect.Width(), result_height = m_ClipRect.Height();
+
+ int result_width = m_ClipRect.Width();
+ int result_height = m_ClipRect.Height();
int src_height = m_pSource->GetHeight();
for (; m_LineIndex < result_height; m_LineIndex++) {
- int dest_y, src_y;
+ int dest_y;
+ int src_y;
if (m_bFlipY) {
dest_y = result_height - m_LineIndex - 1;
src_y = (m_DestHeight - (dest_y + m_ClipRect.top) - 1) * src_height /
@@ -904,23 +910,20 @@ FX_BOOL CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause) {
dest_y = m_LineIndex;
src_y = (dest_y + m_ClipRect.top) * src_height / m_DestHeight;
}
- if (src_y >= src_height) {
- src_y = src_height - 1;
- }
- if (src_y < 0) {
- src_y = 0;
- }
- if (m_pSource->SkipToScanline(src_y, pPause)) {
+ src_y = std::max(std::min(src_y, src_height - 1), 0);
+
+ if (m_pSource->SkipToScanline(src_y, pPause))
return TRUE;
- }
- m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth,
- m_bFlipX, m_ClipRect.left, result_width);
+
+ m_pSource->DownSampleScanline(src_y, m_pScanline.get(), m_DestBPP,
+ m_DestWidth, m_bFlipX, m_ClipRect.left,
+ result_width);
if (m_pMaskScanline) {
m_pSource->m_pAlphaMask->DownSampleScanline(
- src_y, m_pMaskScanline, 1, m_DestWidth, m_bFlipX, m_ClipRect.left,
- result_width);
+ src_y, m_pMaskScanline.get(), 1, m_DestWidth, m_bFlipX,
+ m_ClipRect.left, result_width);
}
- m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline);
+ m_pDest->ComposeScanline(dest_y, m_pScanline.get(), m_pMaskScanline.get());
}
return FALSE;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-08 05:10:16 +0000