public unsafe void Render(Cairo.ImageSurface dst, Gdk.Point offset)
{
if (cr.ScaleFactor > new ScaleFactor (1, 2))
return;
int[] d2SLookupX = cr.Dst2SrcLookupX;
int[] d2SLookupY = cr.Dst2SrcLookupY;
int[] s2DLookupX = cr.Src2DstLookupX;
int[] s2DLookupY = cr.Src2DstLookupY;
ColorBgra[] blackAndWhite = new ColorBgra[2] { ColorBgra.White, ColorBgra.Black };
// draw horizontal lines
int dstHeight = dst.Height;
int dstWidth = dst.Width;
int dstStride = dst.Stride;
int sTop = d2SLookupY[offset.Y];
int sBottom = d2SLookupY[offset.Y + dstHeight];
for (int srcY = sTop; srcY <= sBottom; ++srcY) {
int dstY = s2DLookupY[srcY];
int dstRow = dstY - offset.Y;
if (dstRow >= 0 && dstRow < dstHeight) {
ColorBgra* dstRowPtr = dst.GetRowAddressUnchecked (dstRow);
ColorBgra* dstRowEndPtr = dstRowPtr + dstWidth;
dstRowPtr += offset.X & 1;
while (dstRowPtr < dstRowEndPtr) {
*dstRowPtr = ColorBgra.Black;
dstRowPtr += 2;
}
}
}
// draw vertical lines
int sLeft = d2SLookupX[offset.X];
int sRight = d2SLookupX[offset.X + dstWidth];
for (int srcX = sLeft; srcX <= sRight; ++srcX) {
int dstX = s2DLookupX[srcX];
int dstCol = dstX - offset.X;
if (dstCol >= 0 && dstCol < dstWidth) {
byte* dstColPtr = (byte*)dst.GetPointAddress (dstCol, 0);
byte* dstColEndPtr = dstColPtr + dstStride * dstHeight;
dstColPtr += (offset.Y & 1) * dstStride;
while (dstColPtr < dstColEndPtr) {
*((ColorBgra*)dstColPtr) = ColorBgra.Black;
dstColPtr += 2 * dstStride;
}
}
}
}
private unsafe void RenderZoomOut(List<Layer> layers, Cairo.ImageSurface dst, Gdk.Point offset, Gdk.Size destinationSize)
{
// The first layer should be blended with the transparent checkerboard
var checker = true;
CheckerBoardOperation checker_op = null;
for (int i = 0; i < layers.Count; i++) {
var layer = layers[i];
// If we're in LivePreview, substitute current layer with the preview layer
if (layer == PintaCore.Layers.CurrentLayer && PintaCore.LivePreview.IsEnabled)
layer = CreateLivePreviewLayer (layer);
// If the layer is offset, handle it here
if (!layer.Transform.IsIdentity ())
layer = CreateOffsetLayer (layer);
var src = layer.Surface;
// Get the blend mode for this layer and opacity
var blend_op = UserBlendOps.GetBlendOp (layer.BlendMode, layer.Opacity);
if (checker)
checker_op = new CheckerBoardOperation (layer.Opacity);
const int fpShift = 12;
const int fpFactor = (1 << fpShift);
Gdk.Size sourceSize = src.GetBounds ().Size;
long fDstLeftLong = ((long)offset.X * fpFactor * (long)sourceSize.Width) / (long)destinationSize.Width;
long fDstTopLong = ((long)offset.Y * fpFactor * (long)sourceSize.Height) / (long)destinationSize.Height;
long fDstRightLong = ((long)(offset.X + dst.Width) * fpFactor * (long)sourceSize.Width) / (long)destinationSize.Width;
long fDstBottomLong = ((long)(offset.Y + dst.Height) * fpFactor * (long)sourceSize.Height) / (long)destinationSize.Height;
int fDstLeft = (int)fDstLeftLong;
int fDstTop = (int)fDstTopLong;
int fDstRight = (int)fDstRightLong;
int fDstBottom = (int)fDstBottomLong;
int dx = (fDstRight - fDstLeft) / dst.Width;
int dy = (fDstBottom - fDstTop) / dst.Height;
ColorBgra* src_ptr = (ColorBgra*)src.DataPtr;
ColorBgra* dst_ptr = (ColorBgra*)dst.DataPtr;
int src_width = src.Width;
int dst_width = dst.Width;
for (int dstRow = 0, fDstY = fDstTop; dstRow < dst.Height && fDstY < fDstBottom; ++dstRow, fDstY += dy) {
int srcY1 = fDstY >> fpShift; // y
int srcY2 = (fDstY + (dy >> 2)) >> fpShift; // y + 0.25
int srcY3 = (fDstY + (dy >> 1)) >> fpShift; // y + 0.50
int srcY4 = (fDstY + (dy >> 1) + (dy >> 2)) >> fpShift; // y + 0.75
ColorBgra* src1 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY1);
ColorBgra* src2 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY2);
ColorBgra* src3 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY3);
ColorBgra* src4 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY4);
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
int checkerY = dstRow + offset.Y;
int checkerX = offset.X;
int maxCheckerX = checkerX + dst.Width;
for (int fDstX = fDstLeft; checkerX < maxCheckerX && fDstX < fDstRight; ++checkerX, fDstX += dx) {
int srcX1 = (fDstX + (dx >> 2)) >> fpShift; // x + 0.25
int srcX2 = (fDstX + (dx >> 1) + (dx >> 2)) >> fpShift; // x + 0.75
int srcX3 = fDstX >> fpShift; // x
int srcX4 = (fDstX + (dx >> 1)) >> fpShift; // x + 0.50
ColorBgra* p1 = src1 + srcX1;
ColorBgra* p2 = src2 + srcX2;
ColorBgra* p3 = src3 + srcX3;
ColorBgra* p4 = src4 + srcX4;
int r = (2 + p1->R + p2->R + p3->R + p4->R) >> 2;
int g = (2 + p1->G + p2->G + p3->G + p4->G) >> 2;
int b = (2 + p1->B + p2->B + p3->B + p4->B) >> 2;
int a = (2 + p1->A + p2->A + p3->A + p4->A) >> 2;
// Blend it over the checkerboard background
if (checker)
*dstPtr = checker_op.Apply (ColorBgra.FromUInt32 ((uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)a << 24)), checkerX, checkerY);
else
*dstPtr = blend_op.Apply (*dstPtr, ColorBgra.FromUInt32 ((uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)a << 24)));
++dstPtr;
}
}
// Only checker the first layer
checker = false;
}
}
private unsafe void RenderZoomIn(List<Layer> layers, Cairo.ImageSurface dst, Gdk.Point offset)
{
// The first layer should be blended with the transparent checkerboard
var checker = true;
CheckerBoardOperation checker_op = null;
for (int i = 0; i < layers.Count; i++) {
var layer = layers[i];
// If we're in LivePreview, substitute current layer with the preview layer
if (layer == PintaCore.Layers.CurrentLayer && PintaCore.LivePreview.IsEnabled)
layer = CreateLivePreviewLayer (layer);
// If the layer is offset, handle it here
if (!layer.Transform.IsIdentity ())
layer = CreateOffsetLayer (layer);
var src = layer.Surface;
// Get the blend mode for this layer and opacity
var blend_op = UserBlendOps.GetBlendOp (layer.BlendMode, layer.Opacity);
if (checker)
checker_op = new CheckerBoardOperation (layer.Opacity);
ColorBgra* src_ptr = (ColorBgra*)src.DataPtr;
ColorBgra* dst_ptr = (ColorBgra*)dst.DataPtr;
int src_width = src.Width;
int dst_width = dst.Width;
int dst_height = dst.Height;
if (!generated) {
d2sLookupX = CreateLookupX (src_width, destination_size.Width, scale_factor);
d2sLookupY = CreateLookupY (src.Height, destination_size.Height, scale_factor);
s2dLookupX = CreateS2DLookupX (src_width, destination_size.Width, scale_factor);
s2dLookupY = CreateS2DLookupY (src.Height, destination_size.Height, scale_factor);
generated = true;
}
for (int dstRow = 0; dstRow < dst_height; ++dstRow) {
int nnY = dstRow + offset.Y;
int srcY = d2sLookupY[nnY];
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
ColorBgra* srcRow = src.GetRowAddressUnchecked (src_ptr, src_width, srcY);
for (int dstCol = 0; dstCol < dst_width; ++dstCol) {
int nnX = dstCol + offset.X;
int srcX = d2sLookupX[nnX];
// Blend it over the checkerboard background
if (checker)
*dstPtr = checker_op.Apply (*(srcRow + srcX), dstCol + offset.X, dstRow + offset.Y);
else
*dstPtr = blend_op.Apply (*dstPtr, *(srcRow + srcX));
++dstPtr;
}
}
// Only checker the first layer
checker = false;
}
// If we are at least 200% and grid is requested, draw it
if (PintaCore.Actions.View.PixelGrid.Active && scale_factor.Ratio <= 0.5d)
RenderPixelGrid (dst, offset);
}
private unsafe void RenderPixelGrid(Cairo.ImageSurface dst, Gdk.Point offset)
{
// Draw horizontal lines
var dst_ptr = (ColorBgra*)dst.DataPtr;
int dstHeight = dst.Height;
int dstWidth = dst.Width;
int dstStride = dst.Stride;
int sTop = d2sLookupY[offset.Y];
int sBottom = d2sLookupY[offset.Y + dstHeight];
for (int srcY = sTop; srcY <= sBottom; ++srcY) {
int dstY = s2dLookupY[srcY];
int dstRow = dstY - offset.Y;
if (dstRow >= 0 && dstRow < dstHeight) {
ColorBgra* dstRowPtr = dst.GetRowAddressUnchecked (dst_ptr, dstWidth, dstRow);
ColorBgra* dstRowEndPtr = dstRowPtr + dstWidth;
dstRowPtr += offset.X & 1;
while (dstRowPtr < dstRowEndPtr) {
*dstRowPtr = ColorBgra.Black;
dstRowPtr += 2;
}
}
}
// Draw vertical lines
int sLeft = d2sLookupX[offset.X];
int sRight = d2sLookupX[offset.X + dstWidth];
for (int srcX = sLeft; srcX <= sRight; ++srcX) {
int dstX = s2dLookupX[srcX];
int dstCol = dstX - offset.X;
if (dstCol >= 0 && dstCol < dstWidth) {
byte* dstColPtr = (byte*)dst.GetPointAddress (dstCol, 0);
byte* dstColEndPtr = dstColPtr + dstStride * dstHeight;
dstColPtr += (offset.Y & 1) * dstStride;
while (dstColPtr < dstColEndPtr) {
*((ColorBgra*)dstColPtr) = ColorBgra.Black;
dstColPtr += 2 * dstStride;
}
}
}
}
private unsafe void RenderOneToOne(List<Layer> layers, Cairo.ImageSurface dst, Gdk.Point offset)
{
// The first layer should be blended with the transparent checkerboard
var checker = true;
CheckerBoardOperation checker_op = null;
for (int i = 0; i < layers.Count; i++) {
var layer = layers[i];
// If we're in LivePreview, substitute current layer with the preview layer
if (layer == PintaCore.Layers.CurrentLayer && PintaCore.LivePreview.IsEnabled)
layer = CreateLivePreviewLayer (layer);
// If the layer is offset, handle it here
if (!layer.Transform.IsIdentity ())
layer = CreateOffsetLayer (layer);
var src = layer.Surface;
// Get the blend mode for this layer and opacity
var blend_op = UserBlendOps.GetBlendOp (layer.BlendMode, layer.Opacity);
if (checker)
checker_op = new CheckerBoardOperation (layer.Opacity);
// Figure out where our source and destination intersect
var srcRect = new Gdk.Rectangle (offset, dst.GetBounds ().Size);
srcRect.Intersect (src.GetBounds ());
// Get pointers to our surfaces
var src_ptr = (ColorBgra*)src.DataPtr;
var dst_ptr = (ColorBgra*)dst.DataPtr;
// Cache widths
int src_width = src.Width;
int dst_width = dst.Width;
for (int dstRow = 0; dstRow < srcRect.Height; ++dstRow) {
ColorBgra* dstRowPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
ColorBgra* srcRowPtr = src.GetPointAddressUnchecked (src_ptr, src_width, offset.X, dstRow + offset.Y);
int dstCol = offset.X;
int dstColEnd = offset.X + srcRect.Width;
int checkerY = dstRow + offset.Y;
while (dstCol < dstColEnd) {
// Blend it over the checkerboard background
if (checker)
*dstRowPtr = checker_op.Apply (*srcRowPtr, dstCol, checkerY);
else
*dstRowPtr = blend_op.Apply (*dstRowPtr, *srcRowPtr);
++dstRowPtr;
++srcRowPtr;
++dstCol;
}
}
// Only checker the first layer
checker = false;
}
}
private unsafe void RenderZoomOut(Cairo.ImageSurface src, Cairo.ImageSurface dst, Gdk.Point offset, Gdk.Size destinationSize, bool checker)
{
const int fpShift = 12;
const int fpFactor = (1 << fpShift);
Gdk.Size sourceSize = src.GetBounds ().Size;
long fDstLeftLong = ((long)offset.X * fpFactor * (long)sourceSize.Width) / (long)destinationSize.Width;
long fDstTopLong = ((long)offset.Y * fpFactor * (long)sourceSize.Height) / (long)destinationSize.Height;
long fDstRightLong = ((long)(offset.X + dst.Width) * fpFactor * (long)sourceSize.Width) / (long)destinationSize.Width;
long fDstBottomLong = ((long)(offset.Y + dst.Height) * fpFactor * (long)sourceSize.Height) / (long)destinationSize.Height;
int fDstLeft = (int)fDstLeftLong;
int fDstTop = (int)fDstTopLong;
int fDstRight = (int)fDstRightLong;
int fDstBottom = (int)fDstBottomLong;
int dx = (fDstRight - fDstLeft) / dst.Width;
int dy = (fDstBottom - fDstTop) / dst.Height;
ColorBgra* src_ptr = (ColorBgra*)src.DataPtr;
ColorBgra* dst_ptr = (ColorBgra*)dst.DataPtr;
int src_width = src.Width;
int dst_width = dst.Width;
for (int dstRow = 0, fDstY = fDstTop; dstRow < dst.Height && fDstY < fDstBottom; ++dstRow, fDstY += dy) {
int srcY1 = fDstY >> fpShift; // y
int srcY2 = (fDstY + (dy >> 2)) >> fpShift; // y + 0.25
int srcY3 = (fDstY + (dy >> 1)) >> fpShift; // y + 0.50
int srcY4 = (fDstY + (dy >> 1) + (dy >> 2)) >> fpShift; // y + 0.75
ColorBgra* src1 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY1);
ColorBgra* src2 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY2);
ColorBgra* src3 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY3);
ColorBgra* src4 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY4);
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
int checkerY = dstRow + offset.Y;
int checkerX = offset.X;
int maxCheckerX = checkerX + dst.Width;
for (int fDstX = fDstLeft; checkerX < maxCheckerX && fDstX < fDstRight; ++checkerX, fDstX += dx) {
int srcX1 = (fDstX + (dx >> 2)) >> fpShift; // x + 0.25
int srcX2 = (fDstX + (dx >> 1) + (dx >> 2)) >> fpShift; // x + 0.75
int srcX3 = fDstX >> fpShift; // x
int srcX4 = (fDstX + (dx >> 1)) >> fpShift; // x + 0.50
ColorBgra* p1 = src1 + srcX1;
ColorBgra* p2 = src2 + srcX2;
ColorBgra* p3 = src3 + srcX3;
ColorBgra* p4 = src4 + srcX4;
int r = (2 + p1->R + p2->R + p3->R + p4->R) >> 2;
int g = (2 + p1->G + p2->G + p3->G + p4->G) >> 2;
int b = (2 + p1->B + p2->B + p3->B + p4->B) >> 2;
int a = (2 + p1->A + p2->A + p3->A + p4->A) >> 2;
if (checker) {
// Blend it over the checkerboard background
int v = ((checkerX ^ checkerY) & 8) * 8 + 191;
a = a + (a >> 7);
int vmia = v * (256 - a);
r = ((r * a) + vmia) >> 8;
g = ((g * a) + vmia) >> 8;
b = ((b * a) + vmia) >> 8;
dstPtr->Bgra = (uint)b + ((uint)g << 8) + ((uint)r << 16) + 0xff000000;
} else {
dstPtr->Bgra = (uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)a << 24);
}
++dstPtr;
}
}
}
private unsafe void RenderZoomIn(Cairo.ImageSurface src, Cairo.ImageSurface dst, Gdk.Point offset, bool checker)
{
ColorBgra* src_ptr = (ColorBgra*)src.DataPtr;
ColorBgra* dst_ptr = (ColorBgra*)dst.DataPtr;
int src_width = src.Width;
int dst_width = dst.Width;
int dst_height = dst.Height;
if (!generated) {
d2sLookupX = CreateLookupX (src_width, destination_size.Width, scale_factor);
d2sLookupY = CreateLookupY (src.Height, destination_size.Height, scale_factor);
s2dLookupX = CreateS2DLookupX (src_width, destination_size.Width, scale_factor);
s2dLookupY = CreateS2DLookupY (src.Height, destination_size.Height, scale_factor);
generated = true;
}
for (int dstRow = 0; dstRow < dst_height; ++dstRow) {
int nnY = dstRow + offset.Y;
int srcY = d2sLookupY[nnY];
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
ColorBgra* srcRow = src.GetRowAddressUnchecked (src_ptr, src_width, srcY);
for (int dstCol = 0; dstCol < dst_width; ++dstCol) {
int nnX = dstCol + offset.X;
int srcX = d2sLookupX[nnX];
if (checker) {
ColorBgra src2 = *(srcRow + srcX);
int b = src2.B;
int g = src2.G;
int r = src2.R;
int a = src2.A;
// Blend it over the checkerboard background
int v = (((dstCol + offset.X) ^ (dstRow + offset.Y)) & 8) * 8 + 191;
a = a + (a >> 7);
int vmia = v * (256 - a);
r = ((r * a) + vmia) >> 8;
g = ((g * a) + vmia) >> 8;
b = ((b * a) + vmia) >> 8;
dstPtr->Bgra = (uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)255 << 24);
} else {
*dstPtr = *(srcRow + srcX);
}
++dstPtr;
}
}
}
private unsafe void RenderOneToOne(Cairo.ImageSurface src, Cairo.ImageSurface dst, Gdk.Point offset, bool checker)
{
Gdk.Rectangle srcRect = new Gdk.Rectangle (offset, dst.GetBounds ().Size);
srcRect.Intersect (src.GetBounds ());
ColorBgra* src_ptr = (ColorBgra*)src.DataPtr;
ColorBgra* dst_ptr = (ColorBgra*)dst.DataPtr;
int src_width = src.Width;
int dst_width = dst.Width;
int dst_height = dst.Height;
for (int dstRow = 0; dstRow < srcRect.Height; ++dstRow) {
ColorBgra* dstRowPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
ColorBgra* srcRowPtr = src.GetPointAddressUnchecked (src_ptr, src_width, offset.X, dstRow + offset.Y);
int dstCol = offset.X;
int dstColEnd = offset.X + srcRect.Width;
int checkerY = dstRow + offset.Y;
while (dstCol < dstColEnd) {
// Blend it over the checkerboard background
if (checker) {
int b = srcRowPtr->B;
int g = srcRowPtr->G;
int r = srcRowPtr->R;
int a = srcRowPtr->A;
int v = (((dstCol ^ checkerY) & 8) << 3) + 191;
a = a + (a >> 7);
int vmia = v * (256 - a);
r = ((r * a) + vmia) >> 8;
g = ((g * a) + vmia) >> 8;
b = ((b * a) + vmia) >> 8;
dstRowPtr->Bgra = (uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)255 << 24);
} else {
*dstRowPtr = *srcRowPtr;
}
++dstRowPtr;
++srcRowPtr;
++dstCol;
}
}
}
private unsafe void DrawText(Cairo.ImageSurface dst, string textFont, string text, Point pt, Size measuredSize, bool antiAliasing, Cairo.ImageSurface brush8x8)
{
Point pt2 = pt;
Size measuredSize2 = measuredSize;
int offset = FontHeight;
pt.X -= offset;
measuredSize.Width += 2 * offset;
Rectangle dstRect = new Rectangle (pt, measuredSize);
Rectangle dstRectClipped = Rectangle.Intersect (dstRect, PintaCore.Layers.ToolLayer.Surface.GetBounds ());
PintaCore.Layers.ToolLayer.Clear ();
if (dstRectClipped.Width == 0 || dstRectClipped.Height == 0) {
return;
}
// We only use the first 8,8 of brush
using (Cairo.Context toolctx = new Cairo.Context (PintaCore.Layers.ToolLayer.Surface)) {
//toolctx.FillRectangle (new Cairo.Rectangle(0, 0, 800, 600), new Cairo.Color (0, 0, 0));
toolctx.FillRectangle (dstRect.ToCairoRectangle (), new Cairo.Color (1, 1, 1));
Cairo.ImageSurface surf = PintaCore.Layers.ToolLayer.Surface;
//TODO find how create a surface a of a particular area of a bigger surface!
//for moment work with the whole surface!
if (measuredSize.Width > 0 && measuredSize.Height > 0) {
//dstRectClipped
using (Cairo.Context ctx = new Cairo.Context (PintaCore.Layers.ToolLayer.Surface)) {
Cairo.TextExtents te = TextExtents (ctx, text);
//new Cairo.PointD(dstRect.X - dstRectClipped.X + offset, dstRect.Y - dstRectClipped.Y),
ctx.DrawText (new Cairo.PointD (dstRect.X + offset - te.XBearing, dstRect.Y - te.YBearing), textFont, FontSlant, FontWeight, FontSize, PintaCore.Palette.PrimaryColor, text);
if (underscore_btn.Active) {
int lineSize = 1;
Cairo.FontExtents fe = FontExtents (ctx, text);
ctx.DrawLine (new Cairo.PointD (pt2.X, dstRect.Bottom + fe.Descent), new Cairo.PointD (dstRect.Right - offset, dstRect.Bottom + fe.Descent), PintaCore.Palette.PrimaryColor, lineSize);
}
}
PintaCore.Workspace.Invalidate (dstRectClipped);
}
// Mask out anything that isn't within the user's clip region (selected region)
using (Region clip = Region.Rectangle (PintaCore.Layers.SelectionPath.GetBounds ())) {
clip.Xor (Region.Rectangle (dstRectClipped));
// invert
clip.Intersect (Region.Rectangle (new Rectangle (pt, measuredSize)));
toolctx.FillRegion (clip, new Cairo.Color (1, 1, 1, 1));
}
int skipX;
if (pt.X < 0) {
skipX = -pt.X;
} else {
skipX = 0;
}
int xEnd = Math.Min (dst.Width, pt.X + measuredSize.Width);
bool blending = false;
//AppEnvironment.AlphaBlending;
//if (dst.IsColumnVisible(pt.X + skipX))
//{
for (int y = pt.Y; y < pt.Y + measuredSize.Height; ++y) {
//if (!dst.IsRowVisible(y))
//{
// continue;
//}
ColorBgra* dstPtr = dst.GetPointAddressUnchecked (pt.X + skipX, y);
ColorBgra* srcPtr = PintaCore.Layers.ToolLayer.Surface.GetPointAddress (pt.X + skipX, y);
ColorBgra* brushPtr = brush8x8.GetRowAddressUnchecked (y & 7);
for (int x = pt.X + skipX; x < xEnd; ++x) {
ColorBgra srcPixel = *srcPtr;
ColorBgra dstPixel = *dstPtr;
ColorBgra brushPixel = brushPtr[x & 7];
int alpha = ((255 - srcPixel.R) * brushPixel.A) / 255;
// we could use srcPixel.R, .G, or .B -- the choice here is arbitrary
brushPixel.A = (byte)alpha;
// could use R, G, or B -- arbitrary choice
if (srcPtr->R == 255) {
// do nothing -- leave dst alone
} else if (alpha == 255 || !blending) {
// copy it straight over
*dstPtr = brushPixel;
} else {
// do expensive blending
*dstPtr = UserBlendOps.NormalBlendOp.ApplyStatic (dstPixel, brushPixel);
}
++dstPtr;
++srcPtr;
}
}
//}
}
}
public void Apply (Cairo.ImageSurface dst, Cairo.ImageSurface lhs, Cairo.ImageSurface rhs)
{
if (dst.GetSize () != lhs.GetSize ()) {
throw new ArgumentException ("dst.Size != lhs.Size");
}
if (lhs.GetSize () != rhs.GetSize ()) {
throw new ArgumentException ("lhs.Size != rhs.Size");
}
unsafe {
for (int y = 0; y < dst.Height; ++y) {
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (y);
ColorBgra* lhsPtr = lhs.GetRowAddressUnchecked (y);
ColorBgra* rhsPtr = rhs.GetRowAddressUnchecked (y);
Apply (dstPtr, lhsPtr, rhsPtr, dst.Width);
}
}
}
public void Apply (Cairo.ImageSurface dst, Cairo.ImageSurface src)
{
if (dst.GetSize () != src.GetSize ()) {
throw new ArgumentException ("dst.Size != src.Size");
}
unsafe {
for (int y = 0; y < dst.Height; ++y) {
ColorBgra* dstPtr = dst.GetRowAddressUnchecked (y);
ColorBgra* srcPtr = src.GetRowAddressUnchecked (y);
Apply (dstPtr, srcPtr, dst.Width);
}
}
}
private unsafe void CopyScaledZoomOut (Cairo.ImageSurface src, Cairo.ImageSurface dst, Rectangle roi)
{
// Tell Cairo we need the latest raw data
dst.Flush ();
const int fpShift = 12;
const int fpFactor = (1 << fpShift);
var source_size = src.GetBounds ().Size;
// Find destination bounds
var dst_left = (int)(((long)roi.X * fpFactor * (long)source_size.Width) / (long)destination_size.Width);
var dst_top = (int)(((long)roi.Y * fpFactor * (long)source_size.Height) / (long)destination_size.Height);
var dst_right = (int)(((long)(roi.X + dst.Width) * fpFactor * (long)source_size.Width) / (long)destination_size.Width);
var dst_bottom = (int)(((long)(roi.Y + dst.Height) * fpFactor * (long)source_size.Height) / (long)destination_size.Height);
var dx = (dst_right - dst_left) / dst.Width;
var dy = (dst_bottom - dst_top) / dst.Height;
// Cache pointers to surface raw data and sizes
var src_ptr = (ColorBgra*)src.DataPtr;
var dst_ptr = (ColorBgra*)dst.DataPtr;
var src_width = src.Width;
var dst_width = dst.Width;
var dst_height = dst.Height;
for (int dstRow = 0, fDstY = dst_top; dstRow < dst_height && fDstY < dst_bottom; ++dstRow, fDstY += dy) {
var srcY1 = fDstY >> fpShift; // y
var srcY2 = (fDstY + (dy >> 2)) >> fpShift; // y + 0.25
var srcY3 = (fDstY + (dy >> 1)) >> fpShift; // y + 0.50
var srcY4 = (fDstY + (dy >> 1) + (dy >> 2)) >> fpShift; // y + 0.75
var src1 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY1);
var src2 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY2);
var src3 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY3);
var src4 = src.GetRowAddressUnchecked (src_ptr, src_width, srcY4);
var dstPtr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dstRow);
var checkerY = dstRow + roi.Y;
var checkerX = roi.X;
var maxCheckerX = checkerX + dst.Width;
for (var fDstX = dst_left; checkerX < maxCheckerX && fDstX < dst_right; ++checkerX, fDstX += dx) {
var srcX1 = (fDstX + (dx >> 2)) >> fpShift; // x + 0.25
var srcX2 = (fDstX + (dx >> 1) + (dx >> 2)) >> fpShift; // x + 0.75
var srcX3 = fDstX >> fpShift; // x
var srcX4 = (fDstX + (dx >> 1)) >> fpShift; // x + 0.50
var p1 = src1 + srcX1;
var p2 = src2 + srcX2;
var p3 = src3 + srcX3;
var p4 = src4 + srcX4;
var r = (2 + p1->R + p2->R + p3->R + p4->R) >> 2;
var g = (2 + p1->G + p2->G + p3->G + p4->G) >> 2;
var b = (2 + p1->B + p2->B + p3->B + p4->B) >> 2;
var a = (2 + p1->A + p2->A + p3->A + p4->A) >> 2;
// Copy color to destination
*dstPtr++ = ColorBgra.FromUInt32 ((uint)b + ((uint)g << 8) + ((uint)r << 16) + ((uint)a << 24));
}
}
// Tell Cairo we changed the raw data
dst.MarkDirty ();
}
private unsafe void CopyScaledZoomIn (Cairo.ImageSurface src, Cairo.ImageSurface dst, Rectangle roi)
{
// Tell Cairo we need the latest raw data
dst.Flush ();
EnsureLookupTablesCreated ();
// Cache pointers to surface raw data
var src_ptr = (ColorBgra*)src.DataPtr;
var dst_ptr = (ColorBgra*)dst.DataPtr;
// Cache surface sizes
var src_width = src.Width;
var dst_width = dst.Width;
var dst_height = dst.Height;
for (var dst_row = 0; dst_row < dst_height; ++dst_row) {
// For each dest row, look up the src row to copy from
var nnY = dst_row + roi.Y;
var srcY = d2sLookupY[nnY];
// Get pointers to src and dest rows
var dst_row_ptr = dst.GetRowAddressUnchecked (dst_ptr, dst_width, dst_row);
var src_row_ptr = src.GetRowAddressUnchecked (src_ptr, src_width, srcY);
for (var dstCol = 0; dstCol < dst_width; ++dstCol) {
// Look up the src column to copy from
var nnX = dstCol + roi.X;
var srcX = d2sLookupX[nnX];
// Copy source to destination
*dst_row_ptr++ = *(src_row_ptr + srcX);
}
}
// Tell Cairo we changed the raw data
dst.MarkDirty ();
}
