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-rw-r--r--core/src/fxge/dib/fx_dib_engine.cpp1734
1 files changed, 867 insertions, 867 deletions
diff --git a/core/src/fxge/dib/fx_dib_engine.cpp b/core/src/fxge/dib/fx_dib_engine.cpp
index 3ddbff6409..a51038628e 100644
--- a/core/src/fxge/dib/fx_dib_engine.cpp
+++ b/core/src/fxge/dib/fx_dib_engine.cpp
@@ -1,867 +1,867 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "../../../include/fxge/fx_dib.h"
-#include "../../../include/fxge/fx_ge.h"
-#include "dib_int.h"
-#include <limits.h>
-extern int SDP_Table[513];
-void CWeightTable::Calc(int dest_len, int dest_min, int dest_max, int src_len, int src_min, int src_max, int flags)
-{
- if (m_pWeightTables) {
- FX_Free(m_pWeightTables);
- m_pWeightTables = NULL;
- }
- double scale, base;
- scale = FXSYS_Div((FX_FLOAT)(src_len), (FX_FLOAT)(dest_len));
- if (dest_len < 0) {
- base = (FX_FLOAT)(src_len);
- } else {
- base = 0;
- }
- int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1;
- m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((FX_FLOAT)scale)) + ext_size));
- m_DestMin = dest_min;
- if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) {
- return;
- }
- m_pWeightTables = FX_AllocNL(FX_BYTE, (dest_max - dest_min) * m_ItemSize + 4);
- if (m_pWeightTables == NULL) {
- return;
- }
- FXSYS_memset32(m_pWeightTables, 0, sizeof(FX_BYTE) * ((dest_max - dest_min)*m_ItemSize + 4));
- if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) {
- for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
- PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
- double src_pos = dest_pixel * scale + scale / 2 + base;
- if (flags & FXDIB_INTERPOL) {
- pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
- pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
- if (pixel_weights.m_SrcStart < src_min) {
- pixel_weights.m_SrcStart = src_min;
- }
- if (pixel_weights.m_SrcEnd >= src_max) {
- pixel_weights.m_SrcEnd = src_max - 1;
- }
- if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
- pixel_weights.m_Weights[0] = 65536;
- } else {
- pixel_weights.m_Weights[1] = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 65536);
- pixel_weights.m_Weights[0] = 65536 - pixel_weights.m_Weights[1];
- }
- } else if (flags & FXDIB_BICUBIC_INTERPOL) {
- pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
- pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
- int start = pixel_weights.m_SrcStart - 1;
- int end = pixel_weights.m_SrcEnd + 1;
- if (start < src_min) {
- start = src_min;
- }
- if (end >= src_max) {
- end = src_max - 1;
- }
- if (pixel_weights.m_SrcStart < src_min) {
- src_pos += src_min - pixel_weights.m_SrcStart;
- pixel_weights.m_SrcStart = src_min;
- }
- if (pixel_weights.m_SrcEnd >= src_max) {
- pixel_weights.m_SrcEnd = src_max - 1;
- }
- int weight;
- weight = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 256);
- if (start == end) {
- pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
- } else if ((start == pixel_weights.m_SrcStart && (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd ||
- end == pixel_weights.m_SrcEnd) && start < end) || (start < pixel_weights.m_SrcStart && pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd && end == pixel_weights.m_SrcEnd)) {
- if (start < pixel_weights.m_SrcStart) {
- pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
- pixel_weights.m_Weights[1] = (SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
- } else {
- if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
- pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight]) << 8;
- pixel_weights.m_Weights[1] = SDP_Table[512 - weight] << 8;
- } else {
- pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
- pixel_weights.m_Weights[1] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
- }
- }
- if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
- pixel_weights.m_SrcEnd = end;
- }
- if (start < pixel_weights.m_SrcStart) {
- pixel_weights.m_SrcStart = start;
- }
- } else if (start == pixel_weights.m_SrcStart &&
- start < pixel_weights.m_SrcEnd &&
- pixel_weights.m_SrcEnd < end) {
- pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
- pixel_weights.m_Weights[1] = SDP_Table[256 - weight] << 8;
- pixel_weights.m_Weights[2] = SDP_Table[512 - weight] << 8;
- pixel_weights.m_SrcEnd = end;
- } else if (start < pixel_weights.m_SrcStart &&
- pixel_weights.m_SrcStart < pixel_weights.m_SrcEnd &&
- pixel_weights.m_SrcEnd == end) {
- pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
- pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
- pixel_weights.m_Weights[2] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
- pixel_weights.m_SrcStart = start;
- } else {
- pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
- pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
- pixel_weights.m_Weights[2] = SDP_Table[256 - weight] << 8;
- pixel_weights.m_Weights[3] = SDP_Table[512 - weight] << 8;
- pixel_weights.m_SrcStart = start;
- pixel_weights.m_SrcEnd = end;
- }
- } else {
- pixel_weights.m_SrcStart = pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos);
- if (pixel_weights.m_SrcStart < src_min) {
- pixel_weights.m_SrcStart = src_min;
- }
- if (pixel_weights.m_SrcEnd >= src_max) {
- pixel_weights.m_SrcEnd = src_max - 1;
- }
- pixel_weights.m_Weights[0] = 65536;
- }
- }
- return;
- }
- for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
- PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
- double src_start = dest_pixel * scale + base;
- double src_end = src_start + scale;
- int start_i, end_i;
- if (src_start < src_end) {
- start_i = (int)FXSYS_floor((FX_FLOAT)src_start);
- end_i = (int)FXSYS_ceil((FX_FLOAT)src_end);
- } else {
- start_i = (int)FXSYS_floor((FX_FLOAT)src_end);
- end_i = (int)FXSYS_ceil((FX_FLOAT)src_start);
- }
- if (start_i < src_min) {
- start_i = src_min;
- }
- if (end_i >= src_max) {
- end_i = src_max - 1;
- }
- if (start_i > end_i) {
- if (start_i >= src_max) {
- start_i = src_max - 1;
- }
- pixel_weights.m_SrcStart = start_i;
- pixel_weights.m_SrcEnd = start_i;
- continue;
- }
- pixel_weights.m_SrcStart = start_i;
- pixel_weights.m_SrcEnd = end_i;
- for (int j = start_i; j <= end_i; j ++) {
- double dest_start = FXSYS_Div((FX_FLOAT)(j) - base, scale);
- double dest_end = FXSYS_Div((FX_FLOAT)(j + 1) - base, scale);
- if (dest_start > dest_end) {
- double temp = dest_start;
- dest_start = dest_end;
- dest_end = temp;
- }
- double area_start = dest_start > (FX_FLOAT)(dest_pixel) ? dest_start : (FX_FLOAT)(dest_pixel);
- double area_end = dest_end > (FX_FLOAT)(dest_pixel + 1) ? (FX_FLOAT)(dest_pixel + 1) : dest_end;
- double weight = area_start >= area_end ? 0.0f : area_end - area_start;
- if (weight == 0 && j == end_i) {
- pixel_weights.m_SrcEnd --;
- break;
- }
- pixel_weights.m_Weights[j - start_i] = FXSYS_round((FX_FLOAT)(weight * 65536));
- }
- }
-}
-CStretchEngine::CStretchEngine(IFX_ScanlineComposer* pDestBitmap, FXDIB_Format dest_format,
- int dest_width, int dest_height, const FX_RECT& clip_rect,
- const 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_pInterBuf = NULL;
- m_pExtraAlphaBuf = NULL;
- m_pDestMaskScanline = NULL;
- m_DestClip = clip_rect;
- FX_DWORD size = clip_rect.Width();
- if (size && m_DestBpp > (int)(INT_MAX / size)) {
- return;
- }
- size *= m_DestBpp;
- if (size > INT_MAX - 31) {
- return;
- }
- size += 31;
- size = size / 32 * 4;
- m_pDestScanline = FX_AllocNL(FX_BYTE, size);
- if (m_pDestScanline == NULL) {
- return;
- }
- FXSYS_memset32(m_pDestScanline, 0, sizeof(FX_BYTE) * size);
- if (dest_format == FXDIB_Rgb32) {
- FXSYS_memset8(m_pDestScanline, 255, size);
- }
- m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
- m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
- m_pInterBuf = NULL;
- m_pSource = pSrcBitmap;
- m_SrcWidth = pSrcBitmap->GetWidth();
- m_SrcHeight = pSrcBitmap->GetHeight();
- m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
- if ((flags & FXDIB_NOSMOOTH) == 0) {
- FX_BOOL bInterpol = flags & FXDIB_INTERPOL || flags & FXDIB_BICUBIC_INTERPOL;
- if (!bInterpol && FXSYS_abs(dest_width) != 0 && FXSYS_abs(dest_height) < m_SrcWidth * m_SrcHeight * 8 / FXSYS_abs(dest_width)) {
- flags = FXDIB_INTERPOL;
- }
- m_Flags = flags;
- } else {
- m_Flags = FXDIB_NOSMOOTH;
- if (flags & FXDIB_DOWNSAMPLE) {
- m_Flags |= FXDIB_DOWNSAMPLE;
- }
- }
- double scale_x = FXSYS_Div((FX_FLOAT)(m_SrcWidth), (FX_FLOAT)(m_DestWidth));
- double scale_y = FXSYS_Div((FX_FLOAT)(m_SrcHeight), (FX_FLOAT)(m_DestHeight));
- double base_x = m_DestWidth > 0 ? 0.0f : (FX_FLOAT)(m_DestWidth);
- double base_y = m_DestHeight > 0 ? 0.0f : (FX_FLOAT)(m_DestHeight);
- double src_left = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.left) + base_x);
- double src_right = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.right) + base_x);
- double src_top = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.top) + base_y);
- double src_bottom = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.bottom) + base_y);
- if (src_left > src_right) {
- double temp = src_left;
- src_left = src_right;
- src_right = temp;
- }
- if (src_top > src_bottom) {
- double temp = src_top;
- src_top = src_bottom;
- src_bottom = temp;
- }
- m_SrcClip.left = (int)FXSYS_floor((FX_FLOAT)src_left);
- m_SrcClip.right = (int)FXSYS_ceil((FX_FLOAT)src_right);
- m_SrcClip.top = (int)FXSYS_floor((FX_FLOAT)src_top);
- m_SrcClip.bottom = (int)FXSYS_ceil((FX_FLOAT)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;
- }
- }
-}
-FX_BOOL CStretchEngine::Continue(IFX_Pause* pPause)
-{
- while (m_State == 1) {
- if (ContinueStretchHorz(pPause)) {
- return TRUE;
- }
- m_State = 2;
- StretchVert();
- }
- return FALSE;
-}
-CStretchEngine::~CStretchEngine()
-{
- if (m_pDestScanline) {
- FX_Free(m_pDestScanline);
- }
- if (m_pInterBuf) {
- FX_Free(m_pInterBuf);
- }
- if (m_pExtraAlphaBuf) {
- FX_Free(m_pExtraAlphaBuf);
- }
- if (m_pDestMaskScanline) {
- FX_Free(m_pDestMaskScanline);
- }
-}
-FX_BOOL CStretchEngine::StartStretchHorz()
-{
- if (m_DestWidth == 0 || m_pDestScanline == NULL || m_SrcClip.Height() > (int)((1U << 29) / m_InterPitch) || m_SrcClip.Height() == 0) {
- return FALSE;
- }
-#ifndef _FPDFAPI_MINI_
- m_pInterBuf = FX_AllocNL(unsigned char, m_SrcClip.Height() * m_InterPitch);
-#else
- m_pInterBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_InterPitch);
-#endif
- if (m_pInterBuf == NULL) {
- return FALSE;
- }
- if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) {
- m_pExtraAlphaBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_ExtraMaskPitch);
- if (!m_pExtraAlphaBuf) {
- return FALSE;
- }
- FX_DWORD size = (m_DestClip.Width() * 8 + 31) / 32 * 4;
- m_pDestMaskScanline = FX_AllocNL(unsigned char, size);
- if (!m_pDestMaskScanline) {
- return FALSE;
- }
- }
- m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right, m_SrcWidth, m_SrcClip.left, m_SrcClip.right, m_Flags);
- if (m_WeightTable.m_pWeightTables == NULL) {
- return FALSE;
- }
- m_CurRow = m_SrcClip.top;
- m_State = 1;
- return TRUE;
-}
-#define FX_STRECH_PAUSE_ROWS 10
-FX_BOOL CStretchEngine::ContinueStretchHorz(IFX_Pause* pPause)
-{
- if (!m_DestWidth) {
- return 0;
- }
- if (m_pSource->SkipToScanline(m_CurRow, pPause)) {
- return TRUE;
- }
- int Bpp = m_DestBpp / 8;
- int rows_to_go = FX_STRECH_PAUSE_ROWS;
- for (; m_CurRow < m_SrcClip.bottom; m_CurRow ++) {
- if (rows_to_go == 0) {
- if (pPause && pPause->NeedToPauseNow()) {
- return TRUE;
- } else {
- rows_to_go = FX_STRECH_PAUSE_ROWS;
- }
- }
- FX_LPCBYTE src_scan = m_pSource->GetScanline(m_CurRow);
- FX_LPBYTE dest_scan = m_pInterBuf + (m_CurRow - m_SrcClip.top) * m_InterPitch;
- FX_LPCBYTE src_scan_mask = NULL;
- FX_LPBYTE dest_scan_mask = NULL;
- if (m_pExtraAlphaBuf) {
- src_scan_mask = m_pSource->m_pAlphaMask->GetScanline(m_CurRow);
- dest_scan_mask = m_pExtraAlphaBuf + (m_CurRow - m_SrcClip.top) * m_ExtraMaskPitch;
- }
- switch (m_TransMethod) {
- case 1:
- case 2: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_a = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- if (src_scan[j / 8] & (1 << (7 - j % 8))) {
- dest_a += pixel_weight * 255;
- }
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
- }
- *dest_scan++ = (FX_BYTE)(dest_a >> 16);
- }
- break;
- }
- case 3: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_a = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- dest_a += pixel_weight * src_scan[j];
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
- }
- *dest_scan++ = (FX_BYTE)(dest_a >> 16);
- }
- break;
- }
- case 4: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_a = 0, dest_r = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- pixel_weight = pixel_weight * src_scan_mask[j] / 255;
- dest_r += pixel_weight * src_scan[j];
- dest_a += pixel_weight;
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_r = dest_r < 0 ? 0 : dest_r > 16711680 ? 16711680 : dest_r;
- dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
- }
- *dest_scan++ = (FX_BYTE)(dest_r >> 16);
- *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
- }
- break;
- }
- case 5: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
- if (m_DestFormat == FXDIB_Rgb) {
- dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
- dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
- dest_b_c += pixel_weight * (FX_BYTE)argb_cmyk;
- } else {
- dest_b_c += pixel_weight * (FX_BYTE)(argb_cmyk >> 24);
- dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
- dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
- }
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- }
- *dest_scan++ = (FX_BYTE)(dest_b_c >> 16);
- *dest_scan++ = (FX_BYTE)(dest_g_m >> 16);
- *dest_scan++ = (FX_BYTE)(dest_r_y >> 16);
- }
- break;
- }
- case 6: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- pixel_weight = pixel_weight * src_scan_mask[j] / 255;
- unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
- if (m_DestFormat == FXDIB_Rgba) {
- dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
- dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
- dest_b_c += pixel_weight * (FX_BYTE)argb_cmyk;
- } else {
- dest_b_c += pixel_weight * (FX_BYTE)(argb_cmyk >> 24);
- dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
- dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
- }
- dest_a += pixel_weight;
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_k = dest_k < 0 ? 0 : dest_k > 16711680 ? 16711680 : dest_k;
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
- }
- *dest_scan++ = (FX_BYTE)(dest_b_c >> 16);
- *dest_scan++ = (FX_BYTE)(dest_g_m >> 16);
- *dest_scan++ = (FX_BYTE)(dest_r_y >> 16);
- *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
- }
- break;
- }
- case 7: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- FX_LPCBYTE src_pixel = src_scan + j * Bpp;
- dest_b_c += pixel_weight * (*src_pixel++);
- dest_g_m += pixel_weight * (*src_pixel++);
- dest_r_y += pixel_weight * (*src_pixel);
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- }
- *dest_scan++ = (FX_BYTE)((dest_b_c) >> 16);
- *dest_scan++ = (FX_BYTE)((dest_g_m) >> 16);
- *dest_scan++ = (FX_BYTE)((dest_r_y) >> 16);
- dest_scan += Bpp - 3;
- }
- break;
- }
- case 8: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
- int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- FX_LPCBYTE src_pixel = src_scan + j * Bpp;
- if (m_DestFormat == FXDIB_Argb) {
- pixel_weight = pixel_weight * src_pixel[3] / 255;
- } else {
- pixel_weight = pixel_weight * src_scan_mask[j] / 255;
- }
- dest_b_c += pixel_weight * (*src_pixel++);
- dest_g_m += pixel_weight * (*src_pixel++);
- dest_r_y += pixel_weight * (*src_pixel);
- dest_a += pixel_weight;
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
- }
- *dest_scan++ = (FX_BYTE)((dest_b_c) >> 16);
- *dest_scan++ = (FX_BYTE)((dest_g_m) >> 16);
- *dest_scan++ = (FX_BYTE)((dest_r_y) >> 16);
- if (m_DestFormat == FXDIB_Argb) {
- *dest_scan = (FX_BYTE)((dest_a * 255) >> 16);
- }
- if (dest_scan_mask) {
- *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
- }
- dest_scan += Bpp - 3;
- }
- break;
- }
- }
- rows_to_go --;
- }
- return FALSE;
-}
-void CStretchEngine::StretchVert()
-{
- if (m_DestHeight == 0) {
- return;
- }
- CWeightTable table;
- table.Calc(m_DestHeight, m_DestClip.top, m_DestClip.bottom, m_SrcHeight, m_SrcClip.top, m_SrcClip.bottom, m_Flags);
- if (table.m_pWeightTables == NULL) {
- return;
- }
- int DestBpp = m_DestBpp / 8;
- for (int row = m_DestClip.top; row < m_DestClip.bottom; row ++) {
- unsigned char* dest_scan = m_pDestScanline;
- unsigned char* dest_sacn_mask = m_pDestMaskScanline;
- PixelWeight* pPixelWeights = table.GetPixelWeight(row);
- switch(m_TransMethod) {
- case 1:
- case 2:
- case 3: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
- int dest_a = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- dest_a += pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
- }
- *dest_scan = (FX_BYTE)(dest_a >> 16);
- dest_scan += DestBpp;
- }
- break;
- }
- case 4: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
- unsigned char* src_scan_mask = m_pExtraAlphaBuf + (col - m_DestClip.left);
- int dest_a = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- dest_k += pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
- dest_a += pixel_weight * src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_k = dest_k < 0 ? 0 : dest_k > 16711680 ? 16711680 : dest_k;
- dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
- }
- *dest_scan = (FX_BYTE)(dest_k >> 16);
- dest_scan += DestBpp;
- *dest_sacn_mask++ = (FX_BYTE)(dest_a >> 16);
- }
- break;
- }
- case 5:
- case 7: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
- int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- FX_LPCBYTE src_pixel = src_scan + (j - m_SrcClip.top) * m_InterPitch;
- dest_b_c += pixel_weight * (*src_pixel++);
- dest_g_m += pixel_weight * (*src_pixel++);
- dest_r_y += pixel_weight * (*src_pixel);
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- }
- dest_scan[0] = (FX_BYTE)((dest_b_c) >> 16);
- dest_scan[1] = (FX_BYTE)((dest_g_m) >> 16);
- dest_scan[2] = (FX_BYTE)((dest_r_y) >> 16);
- dest_scan += DestBpp;
- }
- break;
- }
- case 6:
- case 8: {
- for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
- unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
- unsigned char* src_scan_mask = NULL;
- if (m_DestFormat != FXDIB_Argb) {
- src_scan_mask = m_pExtraAlphaBuf + (col - m_DestClip.left);
- }
- int dest_a = 0, dest_k = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
- for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
- int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
- FX_LPCBYTE src_pixel = src_scan + (j - m_SrcClip.top) * m_InterPitch;
- int mask_v = 255;
- if (src_scan_mask) {
- mask_v = src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
- }
- dest_b_c += pixel_weight * (*src_pixel++);
- dest_g_m += pixel_weight * (*src_pixel++);
- dest_r_y += pixel_weight * (*src_pixel);
- if (m_DestFormat == FXDIB_Argb) {
- dest_a += pixel_weight * (*(src_pixel + 1));
- } else {
- dest_a += pixel_weight * mask_v;
- }
- }
- if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
- dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
- dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
- dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
- dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
- }
- if (dest_a) {
- int r = ((FX_DWORD)dest_r_y) * 255 / dest_a;
- int g = ((FX_DWORD)dest_g_m) * 255 / dest_a;
- int b = ((FX_DWORD)dest_b_c) * 255 / dest_a;
- dest_scan[0] = b > 255 ? 255 : b < 0 ? 0 : b;
- dest_scan[1] = g > 255 ? 255 : g < 0 ? 0 : g;
- dest_scan[2] = r > 255 ? 255 : r < 0 ? 0 : r;
- }
- if (m_DestFormat == FXDIB_Argb) {
- dest_scan[3] = (FX_BYTE)((dest_a) >> 16);
- } else {
- *dest_sacn_mask = (FX_BYTE)((dest_a) >> 16);
- }
- dest_scan += DestBpp;
- if (dest_sacn_mask) {
- dest_sacn_mask++;
- }
- }
- break;
- }
- }
- m_pDestBitmap->ComposeScanline(row - m_DestClip.top, m_pDestScanline, m_pDestMaskScanline);
- }
-}
-CFX_ImageStretcher::CFX_ImageStretcher()
-{
- m_pScanline = NULL;
- m_pStretchEngine = NULL;
- m_pMaskScanline = NULL;
-}
-CFX_ImageStretcher::~CFX_ImageStretcher()
-{
- if (m_pScanline) {
- FX_Free(m_pScanline);
- }
- if (m_pStretchEngine) {
- delete m_pStretchEngine;
- }
- if (m_pMaskScanline) {
- FX_Free(m_pMaskScanline);
- }
-}
-FXDIB_Format _GetStretchedFormat(const CFX_DIBSource* pSrc)
-{
- FXDIB_Format format = pSrc->GetFormat();
- if (format == FXDIB_1bppMask) {
- format = FXDIB_8bppMask;
- } else if (format == FXDIB_1bppRgb) {
- format = FXDIB_8bppRgb;
- } else if (format == FXDIB_8bppRgb) {
- if (pSrc->GetPalette()) {
- format = FXDIB_Rgb;
- }
- }
- return format;
-}
-FX_BOOL CFX_ImageStretcher::Start(IFX_ScanlineComposer* pDest,
- const CFX_DIBSource* pSource, int dest_width, int dest_height,
- const FX_RECT& rect, FX_DWORD flags)
-{
- 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()) {
- 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);
- for (int i = 0; i < 256; i ++) {
- int a = a0 + (a1 - a0) * i / 255;
- int r = r0 + (r1 - r0) * i / 255;
- int g = g0 + (g1 - g0) * i / 255;
- int b = b0 + (b1 - b0) * i / 255;
- pal[i] = ArgbEncode(a, r, g, b);
- }
- if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
- return FALSE;
- }
- } else if (pSource->GetFormat() == FXDIB_1bppCmyk && 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);
- for (int i = 0; i < 256; i ++) {
- int c = c0 + (c1 - c0) * i / 255;
- int m = m0 + (m1 - m0) * i / 255;
- int y = y0 + (y1 - y0) * i / 255;
- int k = k0 + (k1 - k0) * i / 255;
- pal[i] = CmykEncode(c, m, y, k);
- }
- if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
- return FALSE;
- }
- } else if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, NULL)) {
- return FALSE;
- }
- if (flags & FXDIB_DOWNSAMPLE) {
- return StartQuickStretch();
- } else {
- return StartStretch();
- }
-}
-FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause)
-{
- if (m_Flags & FXDIB_DOWNSAMPLE) {
- return ContinueQuickStretch(pPause);
- } else {
- return ContinueStretch(pPause);
- }
-}
-#ifndef _FPDFAPI_MINI_
-#define MAX_PROGRESSIVE_STRETCH_PIXELS 1000000
-#else
-#define MAX_PROGRESSIVE_STRETCH_PIXELS 100000
-#endif
-FX_BOOL CFX_ImageStretcher::StartStretch()
-{
- m_pStretchEngine = FX_NEW CStretchEngine(m_pDest, m_DestFormat, m_DestWidth, m_DestHeight, m_ClipRect, m_pSource, m_Flags);
- if (!m_pStretchEngine) {
- return FALSE;
- }
- m_pStretchEngine->StartStretchHorz();
- if (m_pSource->GetWidth() * m_pSource->GetHeight() < MAX_PROGRESSIVE_STRETCH_PIXELS) {
- m_pStretchEngine->Continue(NULL);
- return FALSE;
- }
- return TRUE;
-}
-FX_BOOL CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause)
-{
- if (m_pStretchEngine == NULL) {
- return FALSE;
- }
- return m_pStretchEngine->Continue(pPause);
-}
-FX_BOOL CFX_ImageStretcher::StartQuickStretch()
-{
-#ifdef _FPDFAPI_MINI_
- m_pSource->SetDownSampleSize(m_DestWidth, m_DestHeight);
-#endif
- m_bFlipX = FALSE;
- m_bFlipY = FALSE;
- if (m_DestWidth < 0) {
- m_bFlipX = TRUE;
- m_DestWidth = -m_DestWidth;
- }
- if (m_DestHeight < 0) {
- m_bFlipY = TRUE;
- m_DestHeight = -m_DestHeight;
- }
- m_LineIndex = 0;
- FX_DWORD size = m_ClipRect.Width();
- if (size && m_DestBPP > (int)(INT_MAX / size)) {
- return FALSE;
- }
- size *= m_DestBPP;
- m_pScanline = FX_Alloc(FX_BYTE, (size / 8 + 3) / 4 * 4);
- if (!m_pScanline) {
- return FALSE;
- }
- if (m_pSource->m_pAlphaMask) {
- m_pMaskScanline = FX_Alloc(FX_BYTE, (m_ClipRect.Width() + 3) / 4 * 4);
- if (!m_pMaskScanline) {
- return FALSE;
- }
- }
- if (m_pSource->GetWidth() * m_pSource->GetHeight() < MAX_PROGRESSIVE_STRETCH_PIXELS) {
- ContinueQuickStretch(NULL);
- return FALSE;
- }
- return TRUE;
-}
-FX_BOOL CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause)
-{
- if (m_pScanline == NULL) {
- return FALSE;
- }
- int result_width = m_ClipRect.Width(), result_height = m_ClipRect.Height();
- int src_width = m_pSource->GetWidth(), src_height = m_pSource->GetHeight();
- for (; m_LineIndex < result_height; m_LineIndex ++) {
- int dest_y, src_y;
- if (m_bFlipY) {
- dest_y = result_height - m_LineIndex - 1;
- src_y = (m_DestHeight - (dest_y + m_ClipRect.top) - 1) * src_height / m_DestHeight;
- } else {
- 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)) {
- return TRUE;
- }
- m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
- FX_LPBYTE scan_extra_alpha = NULL;
- if (m_pMaskScanline) {
- m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline, 1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
- }
- m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline);
- }
- return FALSE;
-}
+// Copyright 2014 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#include "../../../include/fxge/fx_dib.h"
+#include "../../../include/fxge/fx_ge.h"
+#include "dib_int.h"
+#include <limits.h>
+extern int SDP_Table[513];
+void CWeightTable::Calc(int dest_len, int dest_min, int dest_max, int src_len, int src_min, int src_max, int flags)
+{
+ if (m_pWeightTables) {
+ FX_Free(m_pWeightTables);
+ m_pWeightTables = NULL;
+ }
+ double scale, base;
+ scale = FXSYS_Div((FX_FLOAT)(src_len), (FX_FLOAT)(dest_len));
+ if (dest_len < 0) {
+ base = (FX_FLOAT)(src_len);
+ } else {
+ base = 0;
+ }
+ int ext_size = flags & FXDIB_BICUBIC_INTERPOL ? 3 : 1;
+ m_ItemSize = sizeof(int) * 2 + (int)(sizeof(int) * (FXSYS_ceil(FXSYS_fabs((FX_FLOAT)scale)) + ext_size));
+ m_DestMin = dest_min;
+ if ((dest_max - dest_min) > (int)((1U << 30) - 4) / m_ItemSize) {
+ return;
+ }
+ m_pWeightTables = FX_AllocNL(FX_BYTE, (dest_max - dest_min) * m_ItemSize + 4);
+ if (m_pWeightTables == NULL) {
+ return;
+ }
+ FXSYS_memset32(m_pWeightTables, 0, sizeof(FX_BYTE) * ((dest_max - dest_min)*m_ItemSize + 4));
+ if ((flags & FXDIB_NOSMOOTH) != 0 || FXSYS_fabs((FX_FLOAT)scale) < 1.0f) {
+ for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
+ PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
+ double src_pos = dest_pixel * scale + scale / 2 + base;
+ if (flags & FXDIB_INTERPOL) {
+ pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
+ pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
+ if (pixel_weights.m_SrcStart < src_min) {
+ pixel_weights.m_SrcStart = src_min;
+ }
+ if (pixel_weights.m_SrcEnd >= src_max) {
+ pixel_weights.m_SrcEnd = src_max - 1;
+ }
+ if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
+ pixel_weights.m_Weights[0] = 65536;
+ } else {
+ pixel_weights.m_Weights[1] = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 65536);
+ pixel_weights.m_Weights[0] = 65536 - pixel_weights.m_Weights[1];
+ }
+ } else if (flags & FXDIB_BICUBIC_INTERPOL) {
+ pixel_weights.m_SrcStart = (int)FXSYS_floor((FX_FLOAT)src_pos - 1.0f / 2);
+ pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos + 1.0f / 2);
+ int start = pixel_weights.m_SrcStart - 1;
+ int end = pixel_weights.m_SrcEnd + 1;
+ if (start < src_min) {
+ start = src_min;
+ }
+ if (end >= src_max) {
+ end = src_max - 1;
+ }
+ if (pixel_weights.m_SrcStart < src_min) {
+ src_pos += src_min - pixel_weights.m_SrcStart;
+ pixel_weights.m_SrcStart = src_min;
+ }
+ if (pixel_weights.m_SrcEnd >= src_max) {
+ pixel_weights.m_SrcEnd = src_max - 1;
+ }
+ int weight;
+ weight = FXSYS_round((FX_FLOAT)(src_pos - pixel_weights.m_SrcStart - 1.0f / 2) * 256);
+ if (start == end) {
+ pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
+ } else if ((start == pixel_weights.m_SrcStart && (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd ||
+ end == pixel_weights.m_SrcEnd) && start < end) || (start < pixel_weights.m_SrcStart && pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd && end == pixel_weights.m_SrcEnd)) {
+ if (start < pixel_weights.m_SrcStart) {
+ pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
+ pixel_weights.m_Weights[1] = (SDP_Table[weight] + SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
+ } else {
+ if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
+ pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight] + SDP_Table[256 - weight]) << 8;
+ pixel_weights.m_Weights[1] = SDP_Table[512 - weight] << 8;
+ } else {
+ pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
+ pixel_weights.m_Weights[1] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
+ }
+ }
+ if (pixel_weights.m_SrcStart == pixel_weights.m_SrcEnd) {
+ pixel_weights.m_SrcEnd = end;
+ }
+ if (start < pixel_weights.m_SrcStart) {
+ pixel_weights.m_SrcStart = start;
+ }
+ } else if (start == pixel_weights.m_SrcStart &&
+ start < pixel_weights.m_SrcEnd &&
+ pixel_weights.m_SrcEnd < end) {
+ pixel_weights.m_Weights[0] = (SDP_Table[256 + weight] + SDP_Table[weight]) << 8;
+ pixel_weights.m_Weights[1] = SDP_Table[256 - weight] << 8;
+ pixel_weights.m_Weights[2] = SDP_Table[512 - weight] << 8;
+ pixel_weights.m_SrcEnd = end;
+ } else if (start < pixel_weights.m_SrcStart &&
+ pixel_weights.m_SrcStart < pixel_weights.m_SrcEnd &&
+ pixel_weights.m_SrcEnd == end) {
+ pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
+ pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
+ pixel_weights.m_Weights[2] = (SDP_Table[256 - weight] + SDP_Table[512 - weight]) << 8;
+ pixel_weights.m_SrcStart = start;
+ } else {
+ pixel_weights.m_Weights[0] = SDP_Table[256 + weight] << 8;
+ pixel_weights.m_Weights[1] = SDP_Table[weight] << 8;
+ pixel_weights.m_Weights[2] = SDP_Table[256 - weight] << 8;
+ pixel_weights.m_Weights[3] = SDP_Table[512 - weight] << 8;
+ pixel_weights.m_SrcStart = start;
+ pixel_weights.m_SrcEnd = end;
+ }
+ } else {
+ pixel_weights.m_SrcStart = pixel_weights.m_SrcEnd = (int)FXSYS_floor((FX_FLOAT)src_pos);
+ if (pixel_weights.m_SrcStart < src_min) {
+ pixel_weights.m_SrcStart = src_min;
+ }
+ if (pixel_weights.m_SrcEnd >= src_max) {
+ pixel_weights.m_SrcEnd = src_max - 1;
+ }
+ pixel_weights.m_Weights[0] = 65536;
+ }
+ }
+ return;
+ }
+ for (int dest_pixel = dest_min; dest_pixel < dest_max; dest_pixel ++) {
+ PixelWeight& pixel_weights = *GetPixelWeight(dest_pixel);
+ double src_start = dest_pixel * scale + base;
+ double src_end = src_start + scale;
+ int start_i, end_i;
+ if (src_start < src_end) {
+ start_i = (int)FXSYS_floor((FX_FLOAT)src_start);
+ end_i = (int)FXSYS_ceil((FX_FLOAT)src_end);
+ } else {
+ start_i = (int)FXSYS_floor((FX_FLOAT)src_end);
+ end_i = (int)FXSYS_ceil((FX_FLOAT)src_start);
+ }
+ if (start_i < src_min) {
+ start_i = src_min;
+ }
+ if (end_i >= src_max) {
+ end_i = src_max - 1;
+ }
+ if (start_i > end_i) {
+ if (start_i >= src_max) {
+ start_i = src_max - 1;
+ }
+ pixel_weights.m_SrcStart = start_i;
+ pixel_weights.m_SrcEnd = start_i;
+ continue;
+ }
+ pixel_weights.m_SrcStart = start_i;
+ pixel_weights.m_SrcEnd = end_i;
+ for (int j = start_i; j <= end_i; j ++) {
+ double dest_start = FXSYS_Div((FX_FLOAT)(j) - base, scale);
+ double dest_end = FXSYS_Div((FX_FLOAT)(j + 1) - base, scale);
+ if (dest_start > dest_end) {
+ double temp = dest_start;
+ dest_start = dest_end;
+ dest_end = temp;
+ }
+ double area_start = dest_start > (FX_FLOAT)(dest_pixel) ? dest_start : (FX_FLOAT)(dest_pixel);
+ double area_end = dest_end > (FX_FLOAT)(dest_pixel + 1) ? (FX_FLOAT)(dest_pixel + 1) : dest_end;
+ double weight = area_start >= area_end ? 0.0f : area_end - area_start;
+ if (weight == 0 && j == end_i) {
+ pixel_weights.m_SrcEnd --;
+ break;
+ }
+ pixel_weights.m_Weights[j - start_i] = FXSYS_round((FX_FLOAT)(weight * 65536));
+ }
+ }
+}
+CStretchEngine::CStretchEngine(IFX_ScanlineComposer* pDestBitmap, FXDIB_Format dest_format,
+ int dest_width, int dest_height, const FX_RECT& clip_rect,
+ const 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_pInterBuf = NULL;
+ m_pExtraAlphaBuf = NULL;
+ m_pDestMaskScanline = NULL;
+ m_DestClip = clip_rect;
+ FX_DWORD size = clip_rect.Width();
+ if (size && m_DestBpp > (int)(INT_MAX / size)) {
+ return;
+ }
+ size *= m_DestBpp;
+ if (size > INT_MAX - 31) {
+ return;
+ }
+ size += 31;
+ size = size / 32 * 4;
+ m_pDestScanline = FX_AllocNL(FX_BYTE, size);
+ if (m_pDestScanline == NULL) {
+ return;
+ }
+ FXSYS_memset32(m_pDestScanline, 0, sizeof(FX_BYTE) * size);
+ if (dest_format == FXDIB_Rgb32) {
+ FXSYS_memset8(m_pDestScanline, 255, size);
+ }
+ m_InterPitch = (m_DestClip.Width() * m_DestBpp + 31) / 32 * 4;
+ m_ExtraMaskPitch = (m_DestClip.Width() * 8 + 31) / 32 * 4;
+ m_pInterBuf = NULL;
+ m_pSource = pSrcBitmap;
+ m_SrcWidth = pSrcBitmap->GetWidth();
+ m_SrcHeight = pSrcBitmap->GetHeight();
+ m_SrcPitch = (m_SrcWidth * m_SrcBpp + 31) / 32 * 4;
+ if ((flags & FXDIB_NOSMOOTH) == 0) {
+ FX_BOOL bInterpol = flags & FXDIB_INTERPOL || flags & FXDIB_BICUBIC_INTERPOL;
+ if (!bInterpol && FXSYS_abs(dest_width) != 0 && FXSYS_abs(dest_height) < m_SrcWidth * m_SrcHeight * 8 / FXSYS_abs(dest_width)) {
+ flags = FXDIB_INTERPOL;
+ }
+ m_Flags = flags;
+ } else {
+ m_Flags = FXDIB_NOSMOOTH;
+ if (flags & FXDIB_DOWNSAMPLE) {
+ m_Flags |= FXDIB_DOWNSAMPLE;
+ }
+ }
+ double scale_x = FXSYS_Div((FX_FLOAT)(m_SrcWidth), (FX_FLOAT)(m_DestWidth));
+ double scale_y = FXSYS_Div((FX_FLOAT)(m_SrcHeight), (FX_FLOAT)(m_DestHeight));
+ double base_x = m_DestWidth > 0 ? 0.0f : (FX_FLOAT)(m_DestWidth);
+ double base_y = m_DestHeight > 0 ? 0.0f : (FX_FLOAT)(m_DestHeight);
+ double src_left = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.left) + base_x);
+ double src_right = FXSYS_Mul(scale_x, (FX_FLOAT)(clip_rect.right) + base_x);
+ double src_top = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.top) + base_y);
+ double src_bottom = FXSYS_Mul(scale_y, (FX_FLOAT)(clip_rect.bottom) + base_y);
+ if (src_left > src_right) {
+ double temp = src_left;
+ src_left = src_right;
+ src_right = temp;
+ }
+ if (src_top > src_bottom) {
+ double temp = src_top;
+ src_top = src_bottom;
+ src_bottom = temp;
+ }
+ m_SrcClip.left = (int)FXSYS_floor((FX_FLOAT)src_left);
+ m_SrcClip.right = (int)FXSYS_ceil((FX_FLOAT)src_right);
+ m_SrcClip.top = (int)FXSYS_floor((FX_FLOAT)src_top);
+ m_SrcClip.bottom = (int)FXSYS_ceil((FX_FLOAT)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;
+ }
+ }
+}
+FX_BOOL CStretchEngine::Continue(IFX_Pause* pPause)
+{
+ while (m_State == 1) {
+ if (ContinueStretchHorz(pPause)) {
+ return TRUE;
+ }
+ m_State = 2;
+ StretchVert();
+ }
+ return FALSE;
+}
+CStretchEngine::~CStretchEngine()
+{
+ if (m_pDestScanline) {
+ FX_Free(m_pDestScanline);
+ }
+ if (m_pInterBuf) {
+ FX_Free(m_pInterBuf);
+ }
+ if (m_pExtraAlphaBuf) {
+ FX_Free(m_pExtraAlphaBuf);
+ }
+ if (m_pDestMaskScanline) {
+ FX_Free(m_pDestMaskScanline);
+ }
+}
+FX_BOOL CStretchEngine::StartStretchHorz()
+{
+ if (m_DestWidth == 0 || m_pDestScanline == NULL || m_SrcClip.Height() > (int)((1U << 29) / m_InterPitch) || m_SrcClip.Height() == 0) {
+ return FALSE;
+ }
+#ifndef _FPDFAPI_MINI_
+ m_pInterBuf = FX_AllocNL(unsigned char, m_SrcClip.Height() * m_InterPitch);
+#else
+ m_pInterBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_InterPitch);
+#endif
+ if (m_pInterBuf == NULL) {
+ return FALSE;
+ }
+ if (m_pSource && m_bHasAlpha && m_pSource->m_pAlphaMask) {
+ m_pExtraAlphaBuf = FX_Alloc(unsigned char, m_SrcClip.Height() * m_ExtraMaskPitch);
+ if (!m_pExtraAlphaBuf) {
+ return FALSE;
+ }
+ FX_DWORD size = (m_DestClip.Width() * 8 + 31) / 32 * 4;
+ m_pDestMaskScanline = FX_AllocNL(unsigned char, size);
+ if (!m_pDestMaskScanline) {
+ return FALSE;
+ }
+ }
+ m_WeightTable.Calc(m_DestWidth, m_DestClip.left, m_DestClip.right, m_SrcWidth, m_SrcClip.left, m_SrcClip.right, m_Flags);
+ if (m_WeightTable.m_pWeightTables == NULL) {
+ return FALSE;
+ }
+ m_CurRow = m_SrcClip.top;
+ m_State = 1;
+ return TRUE;
+}
+#define FX_STRECH_PAUSE_ROWS 10
+FX_BOOL CStretchEngine::ContinueStretchHorz(IFX_Pause* pPause)
+{
+ if (!m_DestWidth) {
+ return 0;
+ }
+ if (m_pSource->SkipToScanline(m_CurRow, pPause)) {
+ return TRUE;
+ }
+ int Bpp = m_DestBpp / 8;
+ int rows_to_go = FX_STRECH_PAUSE_ROWS;
+ for (; m_CurRow < m_SrcClip.bottom; m_CurRow ++) {
+ if (rows_to_go == 0) {
+ if (pPause && pPause->NeedToPauseNow()) {
+ return TRUE;
+ } else {
+ rows_to_go = FX_STRECH_PAUSE_ROWS;
+ }
+ }
+ FX_LPCBYTE src_scan = m_pSource->GetScanline(m_CurRow);
+ FX_LPBYTE dest_scan = m_pInterBuf + (m_CurRow - m_SrcClip.top) * m_InterPitch;
+ FX_LPCBYTE src_scan_mask = NULL;
+ FX_LPBYTE dest_scan_mask = NULL;
+ if (m_pExtraAlphaBuf) {
+ src_scan_mask = m_pSource->m_pAlphaMask->GetScanline(m_CurRow);
+ dest_scan_mask = m_pExtraAlphaBuf + (m_CurRow - m_SrcClip.top) * m_ExtraMaskPitch;
+ }
+ switch (m_TransMethod) {
+ case 1:
+ case 2: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_a = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ if (src_scan[j / 8] & (1 << (7 - j % 8))) {
+ dest_a += pixel_weight * 255;
+ }
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
+ }
+ *dest_scan++ = (FX_BYTE)(dest_a >> 16);
+ }
+ break;
+ }
+ case 3: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_a = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ dest_a += pixel_weight * src_scan[j];
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
+ }
+ *dest_scan++ = (FX_BYTE)(dest_a >> 16);
+ }
+ break;
+ }
+ case 4: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_a = 0, dest_r = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ pixel_weight = pixel_weight * src_scan_mask[j] / 255;
+ dest_r += pixel_weight * src_scan[j];
+ dest_a += pixel_weight;
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_r = dest_r < 0 ? 0 : dest_r > 16711680 ? 16711680 : dest_r;
+ dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
+ }
+ *dest_scan++ = (FX_BYTE)(dest_r >> 16);
+ *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
+ }
+ break;
+ }
+ case 5: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
+ if (m_DestFormat == FXDIB_Rgb) {
+ dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
+ dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
+ dest_b_c += pixel_weight * (FX_BYTE)argb_cmyk;
+ } else {
+ dest_b_c += pixel_weight * (FX_BYTE)(argb_cmyk >> 24);
+ dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
+ dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
+ }
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ }
+ *dest_scan++ = (FX_BYTE)(dest_b_c >> 16);
+ *dest_scan++ = (FX_BYTE)(dest_g_m >> 16);
+ *dest_scan++ = (FX_BYTE)(dest_r_y >> 16);
+ }
+ break;
+ }
+ case 6: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ pixel_weight = pixel_weight * src_scan_mask[j] / 255;
+ unsigned long argb_cmyk = m_pSrcPalette[src_scan[j]];
+ if (m_DestFormat == FXDIB_Rgba) {
+ dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
+ dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
+ dest_b_c += pixel_weight * (FX_BYTE)argb_cmyk;
+ } else {
+ dest_b_c += pixel_weight * (FX_BYTE)(argb_cmyk >> 24);
+ dest_g_m += pixel_weight * (FX_BYTE)(argb_cmyk >> 16);
+ dest_r_y += pixel_weight * (FX_BYTE)(argb_cmyk >> 8);
+ }
+ dest_a += pixel_weight;
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_k = dest_k < 0 ? 0 : dest_k > 16711680 ? 16711680 : dest_k;
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
+ }
+ *dest_scan++ = (FX_BYTE)(dest_b_c >> 16);
+ *dest_scan++ = (FX_BYTE)(dest_g_m >> 16);
+ *dest_scan++ = (FX_BYTE)(dest_r_y >> 16);
+ *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
+ }
+ break;
+ }
+ case 7: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ FX_LPCBYTE src_pixel = src_scan + j * Bpp;
+ dest_b_c += pixel_weight * (*src_pixel++);
+ dest_g_m += pixel_weight * (*src_pixel++);
+ dest_r_y += pixel_weight * (*src_pixel);
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ }
+ *dest_scan++ = (FX_BYTE)((dest_b_c) >> 16);
+ *dest_scan++ = (FX_BYTE)((dest_g_m) >> 16);
+ *dest_scan++ = (FX_BYTE)((dest_r_y) >> 16);
+ dest_scan += Bpp - 3;
+ }
+ break;
+ }
+ case 8: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ PixelWeight* pPixelWeights = m_WeightTable.GetPixelWeight(col);
+ int dest_a = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ FX_LPCBYTE src_pixel = src_scan + j * Bpp;
+ if (m_DestFormat == FXDIB_Argb) {
+ pixel_weight = pixel_weight * src_pixel[3] / 255;
+ } else {
+ pixel_weight = pixel_weight * src_scan_mask[j] / 255;
+ }
+ dest_b_c += pixel_weight * (*src_pixel++);
+ dest_g_m += pixel_weight * (*src_pixel++);
+ dest_r_y += pixel_weight * (*src_pixel);
+ dest_a += pixel_weight;
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ dest_a = dest_a < 0 ? 0 : dest_a > 65536 ? 65536 : dest_a;
+ }
+ *dest_scan++ = (FX_BYTE)((dest_b_c) >> 16);
+ *dest_scan++ = (FX_BYTE)((dest_g_m) >> 16);
+ *dest_scan++ = (FX_BYTE)((dest_r_y) >> 16);
+ if (m_DestFormat == FXDIB_Argb) {
+ *dest_scan = (FX_BYTE)((dest_a * 255) >> 16);
+ }
+ if (dest_scan_mask) {
+ *dest_scan_mask++ = (FX_BYTE)((dest_a * 255) >> 16);
+ }
+ dest_scan += Bpp - 3;
+ }
+ break;
+ }
+ }
+ rows_to_go --;
+ }
+ return FALSE;
+}
+void CStretchEngine::StretchVert()
+{
+ if (m_DestHeight == 0) {
+ return;
+ }
+ CWeightTable table;
+ table.Calc(m_DestHeight, m_DestClip.top, m_DestClip.bottom, m_SrcHeight, m_SrcClip.top, m_SrcClip.bottom, m_Flags);
+ if (table.m_pWeightTables == NULL) {
+ return;
+ }
+ int DestBpp = m_DestBpp / 8;
+ for (int row = m_DestClip.top; row < m_DestClip.bottom; row ++) {
+ unsigned char* dest_scan = m_pDestScanline;
+ unsigned char* dest_sacn_mask = m_pDestMaskScanline;
+ PixelWeight* pPixelWeights = table.GetPixelWeight(row);
+ switch(m_TransMethod) {
+ case 1:
+ case 2:
+ case 3: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
+ int dest_a = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ dest_a += pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
+ }
+ *dest_scan = (FX_BYTE)(dest_a >> 16);
+ dest_scan += DestBpp;
+ }
+ break;
+ }
+ case 4: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
+ unsigned char* src_scan_mask = m_pExtraAlphaBuf + (col - m_DestClip.left);
+ int dest_a = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ dest_k += pixel_weight * src_scan[(j - m_SrcClip.top) * m_InterPitch];
+ dest_a += pixel_weight * src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_k = dest_k < 0 ? 0 : dest_k > 16711680 ? 16711680 : dest_k;
+ dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
+ }
+ *dest_scan = (FX_BYTE)(dest_k >> 16);
+ dest_scan += DestBpp;
+ *dest_sacn_mask++ = (FX_BYTE)(dest_a >> 16);
+ }
+ break;
+ }
+ case 5:
+ case 7: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
+ int dest_r_y = 0, dest_g_m = 0, dest_b_c = 0, dest_k = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ FX_LPCBYTE src_pixel = src_scan + (j - m_SrcClip.top) * m_InterPitch;
+ dest_b_c += pixel_weight * (*src_pixel++);
+ dest_g_m += pixel_weight * (*src_pixel++);
+ dest_r_y += pixel_weight * (*src_pixel);
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ }
+ dest_scan[0] = (FX_BYTE)((dest_b_c) >> 16);
+ dest_scan[1] = (FX_BYTE)((dest_g_m) >> 16);
+ dest_scan[2] = (FX_BYTE)((dest_r_y) >> 16);
+ dest_scan += DestBpp;
+ }
+ break;
+ }
+ case 6:
+ case 8: {
+ for (int col = m_DestClip.left; col < m_DestClip.right; col ++) {
+ unsigned char* src_scan = m_pInterBuf + (col - m_DestClip.left) * DestBpp;
+ unsigned char* src_scan_mask = NULL;
+ if (m_DestFormat != FXDIB_Argb) {
+ src_scan_mask = m_pExtraAlphaBuf + (col - m_DestClip.left);
+ }
+ int dest_a = 0, dest_k = 0, dest_r_y = 0, dest_g_m = 0, dest_b_c = 0;
+ for (int j = pPixelWeights->m_SrcStart; j <= pPixelWeights->m_SrcEnd; j ++) {
+ int pixel_weight = pPixelWeights->m_Weights[j - pPixelWeights->m_SrcStart];
+ FX_LPCBYTE src_pixel = src_scan + (j - m_SrcClip.top) * m_InterPitch;
+ int mask_v = 255;
+ if (src_scan_mask) {
+ mask_v = src_scan_mask[(j - m_SrcClip.top) * m_ExtraMaskPitch];
+ }
+ dest_b_c += pixel_weight * (*src_pixel++);
+ dest_g_m += pixel_weight * (*src_pixel++);
+ dest_r_y += pixel_weight * (*src_pixel);
+ if (m_DestFormat == FXDIB_Argb) {
+ dest_a += pixel_weight * (*(src_pixel + 1));
+ } else {
+ dest_a += pixel_weight * mask_v;
+ }
+ }
+ if (m_Flags & FXDIB_BICUBIC_INTERPOL) {
+ dest_r_y = dest_r_y < 0 ? 0 : dest_r_y > 16711680 ? 16711680 : dest_r_y;
+ dest_g_m = dest_g_m < 0 ? 0 : dest_g_m > 16711680 ? 16711680 : dest_g_m;
+ dest_b_c = dest_b_c < 0 ? 0 : dest_b_c > 16711680 ? 16711680 : dest_b_c;
+ dest_a = dest_a < 0 ? 0 : dest_a > 16711680 ? 16711680 : dest_a;
+ }
+ if (dest_a) {
+ int r = ((FX_DWORD)dest_r_y) * 255 / dest_a;
+ int g = ((FX_DWORD)dest_g_m) * 255 / dest_a;
+ int b = ((FX_DWORD)dest_b_c) * 255 / dest_a;
+ dest_scan[0] = b > 255 ? 255 : b < 0 ? 0 : b;
+ dest_scan[1] = g > 255 ? 255 : g < 0 ? 0 : g;
+ dest_scan[2] = r > 255 ? 255 : r < 0 ? 0 : r;
+ }
+ if (m_DestFormat == FXDIB_Argb) {
+ dest_scan[3] = (FX_BYTE)((dest_a) >> 16);
+ } else {
+ *dest_sacn_mask = (FX_BYTE)((dest_a) >> 16);
+ }
+ dest_scan += DestBpp;
+ if (dest_sacn_mask) {
+ dest_sacn_mask++;
+ }
+ }
+ break;
+ }
+ }
+ m_pDestBitmap->ComposeScanline(row - m_DestClip.top, m_pDestScanline, m_pDestMaskScanline);
+ }
+}
+CFX_ImageStretcher::CFX_ImageStretcher()
+{
+ m_pScanline = NULL;
+ m_pStretchEngine = NULL;
+ m_pMaskScanline = NULL;
+}
+CFX_ImageStretcher::~CFX_ImageStretcher()
+{
+ if (m_pScanline) {
+ FX_Free(m_pScanline);
+ }
+ if (m_pStretchEngine) {
+ delete m_pStretchEngine;
+ }
+ if (m_pMaskScanline) {
+ FX_Free(m_pMaskScanline);
+ }
+}
+FXDIB_Format _GetStretchedFormat(const CFX_DIBSource* pSrc)
+{
+ FXDIB_Format format = pSrc->GetFormat();
+ if (format == FXDIB_1bppMask) {
+ format = FXDIB_8bppMask;
+ } else if (format == FXDIB_1bppRgb) {
+ format = FXDIB_8bppRgb;
+ } else if (format == FXDIB_8bppRgb) {
+ if (pSrc->GetPalette()) {
+ format = FXDIB_Rgb;
+ }
+ }
+ return format;
+}
+FX_BOOL CFX_ImageStretcher::Start(IFX_ScanlineComposer* pDest,
+ const CFX_DIBSource* pSource, int dest_width, int dest_height,
+ const FX_RECT& rect, FX_DWORD flags)
+{
+ 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()) {
+ 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);
+ for (int i = 0; i < 256; i ++) {
+ int a = a0 + (a1 - a0) * i / 255;
+ int r = r0 + (r1 - r0) * i / 255;
+ int g = g0 + (g1 - g0) * i / 255;
+ int b = b0 + (b1 - b0) * i / 255;
+ pal[i] = ArgbEncode(a, r, g, b);
+ }
+ if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
+ return FALSE;
+ }
+ } else if (pSource->GetFormat() == FXDIB_1bppCmyk && 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);
+ for (int i = 0; i < 256; i ++) {
+ int c = c0 + (c1 - c0) * i / 255;
+ int m = m0 + (m1 - m0) * i / 255;
+ int y = y0 + (y1 - y0) * i / 255;
+ int k = k0 + (k1 - k0) * i / 255;
+ pal[i] = CmykEncode(c, m, y, k);
+ }
+ if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, pal)) {
+ return FALSE;
+ }
+ } else if (!pDest->SetInfo(rect.Width(), rect.Height(), m_DestFormat, NULL)) {
+ return FALSE;
+ }
+ if (flags & FXDIB_DOWNSAMPLE) {
+ return StartQuickStretch();
+ } else {
+ return StartStretch();
+ }
+}
+FX_BOOL CFX_ImageStretcher::Continue(IFX_Pause* pPause)
+{
+ if (m_Flags & FXDIB_DOWNSAMPLE) {
+ return ContinueQuickStretch(pPause);
+ } else {
+ return ContinueStretch(pPause);
+ }
+}
+#ifndef _FPDFAPI_MINI_
+#define MAX_PROGRESSIVE_STRETCH_PIXELS 1000000
+#else
+#define MAX_PROGRESSIVE_STRETCH_PIXELS 100000
+#endif
+FX_BOOL CFX_ImageStretcher::StartStretch()
+{
+ m_pStretchEngine = FX_NEW CStretchEngine(m_pDest, m_DestFormat, m_DestWidth, m_DestHeight, m_ClipRect, m_pSource, m_Flags);
+ if (!m_pStretchEngine) {
+ return FALSE;
+ }
+ m_pStretchEngine->StartStretchHorz();
+ if (m_pSource->GetWidth() * m_pSource->GetHeight() < MAX_PROGRESSIVE_STRETCH_PIXELS) {
+ m_pStretchEngine->Continue(NULL);
+ return FALSE;
+ }
+ return TRUE;
+}
+FX_BOOL CFX_ImageStretcher::ContinueStretch(IFX_Pause* pPause)
+{
+ if (m_pStretchEngine == NULL) {
+ return FALSE;
+ }
+ return m_pStretchEngine->Continue(pPause);
+}
+FX_BOOL CFX_ImageStretcher::StartQuickStretch()
+{
+#ifdef _FPDFAPI_MINI_
+ m_pSource->SetDownSampleSize(m_DestWidth, m_DestHeight);
+#endif
+ m_bFlipX = FALSE;
+ m_bFlipY = FALSE;
+ if (m_DestWidth < 0) {
+ m_bFlipX = TRUE;
+ m_DestWidth = -m_DestWidth;
+ }
+ if (m_DestHeight < 0) {
+ m_bFlipY = TRUE;
+ m_DestHeight = -m_DestHeight;
+ }
+ m_LineIndex = 0;
+ FX_DWORD size = m_ClipRect.Width();
+ if (size && m_DestBPP > (int)(INT_MAX / size)) {
+ return FALSE;
+ }
+ size *= m_DestBPP;
+ m_pScanline = FX_Alloc(FX_BYTE, (size / 8 + 3) / 4 * 4);
+ if (!m_pScanline) {
+ return FALSE;
+ }
+ if (m_pSource->m_pAlphaMask) {
+ m_pMaskScanline = FX_Alloc(FX_BYTE, (m_ClipRect.Width() + 3) / 4 * 4);
+ if (!m_pMaskScanline) {
+ return FALSE;
+ }
+ }
+ if (m_pSource->GetWidth() * m_pSource->GetHeight() < MAX_PROGRESSIVE_STRETCH_PIXELS) {
+ ContinueQuickStretch(NULL);
+ return FALSE;
+ }
+ return TRUE;
+}
+FX_BOOL CFX_ImageStretcher::ContinueQuickStretch(IFX_Pause* pPause)
+{
+ if (m_pScanline == NULL) {
+ return FALSE;
+ }
+ int result_width = m_ClipRect.Width(), result_height = m_ClipRect.Height();
+ int src_width = m_pSource->GetWidth(), src_height = m_pSource->GetHeight();
+ for (; m_LineIndex < result_height; m_LineIndex ++) {
+ int dest_y, src_y;
+ if (m_bFlipY) {
+ dest_y = result_height - m_LineIndex - 1;
+ src_y = (m_DestHeight - (dest_y + m_ClipRect.top) - 1) * src_height / m_DestHeight;
+ } else {
+ 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)) {
+ return TRUE;
+ }
+ m_pSource->DownSampleScanline(src_y, m_pScanline, m_DestBPP, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
+ FX_LPBYTE scan_extra_alpha = NULL;
+ if (m_pMaskScanline) {
+ m_pSource->m_pAlphaMask->DownSampleScanline(src_y, m_pMaskScanline, 1, m_DestWidth, m_bFlipX, m_ClipRect.left, result_width);
+ }
+ m_pDest->ComposeScanline(dest_y, m_pScanline, m_pMaskScanline);
+ }
+ return FALSE;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 12:37:32 +0000