diff options
author | Pierre Ossman <ossman@cendio.se> | 2014-07-07 14:27:04 +0200 |
---|---|---|
committer | Pierre Ossman <ossman@cendio.se> | 2014-07-07 14:27:04 +0200 |
commit | 0aa3157cf6bf2a5d20a8a84515d2ee5c15faef65 (patch) | |
tree | 659c6081230675758edcfb66a394fc1aa3e1bacb /common/rfb/ScaledPixelBuffer.cxx | |
parent | 1338c0dc2d79235cd0380a1f11a7558548929a82 (diff) | |
parent | 5ad4d06006e96b1c7ff663ffcd5e406e06bae1c2 (diff) | |
download | tigervnc-0aa3157cf6bf2a5d20a8a84515d2ee5c15faef65.tar.gz tigervnc-0aa3157cf6bf2a5d20a8a84515d2ee5c15faef65.zip |
Merge branch 'cleanup' of https://github.com/CendioOssman/tigervnc
Diffstat (limited to 'common/rfb/ScaledPixelBuffer.cxx')
-rw-r--r-- | common/rfb/ScaledPixelBuffer.cxx | 225 |
1 files changed, 0 insertions, 225 deletions
diff --git a/common/rfb/ScaledPixelBuffer.cxx b/common/rfb/ScaledPixelBuffer.cxx deleted file mode 100644 index dc6096d7..00000000 --- a/common/rfb/ScaledPixelBuffer.cxx +++ /dev/null @@ -1,225 +0,0 @@ -/* Copyright (C) 2005 TightVNC Team. All Rights Reserved. - * - * This is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This software is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this software; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, - * USA. - */ - -// -=- ScaledPixelBuffer.cxx - -#include <rfb/Exception.h> -#include <rfb/ScaledPixelBuffer.h> - -#include <math.h> -#include <memory.h> -#include <stdlib.h> - -using namespace rdr; -using namespace rfb; - -ScaledPixelBuffer::ScaledPixelBuffer(U8 **src_data_, int src_width_, - int src_height_, int scale_, PixelFormat pf_) - : scale(scale_), scale_ratio_x(1), scale_ratio_y(1), scaleFilterID(scaleFilterBilinear), - xWeightTabs(0), yWeightTabs(0), raccum(0), gaccum(0), baccum(0), scaled_data(0) { - - setSourceBuffer(src_data_, src_width_, src_height_); - setPF(pf_); -} - -ScaledPixelBuffer::ScaledPixelBuffer() - : src_width(0), src_height(0), scaled_width(0), scaled_height(0), scale(100), - scale_ratio_x(1), scale_ratio_y(1), scaleFilterID(scaleFilterBilinear), - xWeightTabs(0), yWeightTabs(0), raccum(0), gaccum(0), baccum(0), - src_data(0), scaled_data(0) { - memset(&pf, 0, sizeof(pf)); -} - -ScaledPixelBuffer::~ScaledPixelBuffer() { - freeWeightTabs(); - if (raccum) delete [] raccum; - if (gaccum) delete [] gaccum; - if (baccum) delete [] baccum; -} - -void ScaledPixelBuffer::freeWeightTabs() { - if (xWeightTabs) { - for (int i = 0; i < scaled_width; i++) delete [] xWeightTabs[i].weight; - delete [] xWeightTabs; - xWeightTabs = 0; - } - if (yWeightTabs) { - for (int i = 0; i < scaled_height; i++) delete [] yWeightTabs[i].weight; - delete [] yWeightTabs; - yWeightTabs = 0; - } -} - -void ScaledPixelBuffer::recreateRowAccum() { - if (raccum) delete [] raccum; - if (gaccum) delete [] gaccum; - if (baccum) delete [] baccum; - raccum = new int[src_width]; - gaccum = new int[src_width]; - baccum = new int[src_width]; -} - -void ScaledPixelBuffer::setSourceBuffer(U8 **src_data_, int w, int h) { - if (w > 0 && h > 0 && src_data_ != NULL) { - freeWeightTabs(); - src_data = src_data_; - src_width = w; - src_height = h; - recreateRowAccum(); - calculateScaledBufferSize(); - scaleFilters.makeWeightTabs(scaleFilterID, src_width, scaled_width, &xWeightTabs); - scaleFilters.makeWeightTabs(scaleFilterID, src_height, scaled_height, &yWeightTabs); - } -} - -void ScaledPixelBuffer::setPF(const PixelFormat &pf_) { - ///if (pf_.depth != 24) throw rfb::UnsupportedPixelFormatException(); - pf = pf_; -} - -void ScaledPixelBuffer::setScale(int scale_) { - if (scale != scale_ && scale_ > 0) { - scale = scale_; - freeWeightTabs(); - calculateScaledBufferSize(); - scaleFilters.makeWeightTabs(scaleFilterID, src_width, scaled_width, &xWeightTabs); - scaleFilters.makeWeightTabs(scaleFilterID, src_height, scaled_height, &yWeightTabs); - } -} - -void ScaledPixelBuffer::setScaleFilter(unsigned int scaleFilterID_) { - if (scaleFilterID == scaleFilterID_ || scaleFilterID_ > scaleFilterMaxNumber) return; - - scaleFilterID = scaleFilterID_; - - if (src_width && src_height && scaled_width && scaled_height) { - freeWeightTabs(); - scaleFilters.makeWeightTabs(scaleFilterID, src_width, scaled_width, &xWeightTabs); - scaleFilters.makeWeightTabs(scaleFilterID, src_height, scaled_height, &yWeightTabs); - if (scale != 100 && pf.depth > 0 && scaled_data) scaleRect(Rect(0, 0, src_width, src_height)); - } -} - -inline U32 ScaledPixelBuffer::getSourcePixel(int x, int y) { - int bytes_per_pixel = pf.bpp / 8; - U8 *ptr = &(*src_data)[(x + y*src_width)*bytes_per_pixel]; - if (bytes_per_pixel == 1) { - return *ptr; - } else if (bytes_per_pixel == 2) { - int b0 = *ptr++; int b1 = *ptr; - return b1 << 8 | b0; - } else if (bytes_per_pixel == 4) { - int b0 = *ptr++; int b1 = *ptr++; - int b2 = *ptr++; int b3 = *ptr; - return b3 << 24 | b2 << 16 | b1 << 8 | b0; - } else { - return 0; - } -} - -void ScaledPixelBuffer::scaleRect(const Rect& rect) { - Rect changed_rect; - U8 *ptr, *ptrs, *px, *pxs; - U16 r, g, b; - int red, green, blue; - short *xweight, *yweight, weight; - - // Calculate the changed pixel rect in the scaled image - changed_rect = calculateScaleBoundary(rect); - - int bytesPerSrcPixel = pf.bpp / 8; - int bytesPerSrcRow = src_width * bytesPerSrcPixel; - int bytesPerScaledRow = scaled_width * 4; - - int bytesPerAccumRow = src_width * sizeof(int); - - ptrs = &(*scaled_data)[(changed_rect.tl.x + changed_rect.tl.y*scaled_width) * 4]; - for (int y = changed_rect.tl.y; y < changed_rect.br.y; y++) { - ptr = ptrs; - yweight = yWeightTabs[y].weight; - - // Clear the color accumulators - memset(raccum, 0, bytesPerAccumRow); - memset(gaccum, 0, bytesPerAccumRow); - memset(baccum, 0, bytesPerAccumRow); - - // Make the convolution the source image with scale filter weights - // by y axis and save results to the color accumulators. - pxs = &(*src_data)[(xWeightTabs[changed_rect.tl.x].i0 + yWeightTabs[y].i0*src_width) * bytesPerSrcPixel]; - for (int ys = yWeightTabs[y].i0; ys < yWeightTabs[y].i1; ys++) { - px = pxs; - for (int xs = xWeightTabs[changed_rect.tl.x].i0; xs < xWeightTabs[changed_rect.br.x-1].i1; xs++) { - pf.rgbFromPixel(*((U32*)px), NULL, &r, &g, &b); - weight = *yweight; - raccum[xs] += (int)(weight) * r; - gaccum[xs] += (int)(weight) * g; - baccum[xs] += (int)(weight) * b; - px += bytesPerSrcPixel; - } - yweight++; - pxs += bytesPerSrcRow; - } - - // Make the convolution the color accumulators with scale filter weights - // by x axis and save results to the scaled image. - for (int x = changed_rect.tl.x; x < changed_rect.br.x; x++) { - // Init the sum of colors with (1 << (shift-1)) for rounding. - red = green = blue = 1 << (FINALSHIFT-1); - xweight = xWeightTabs[x].weight; - for (int xs = xWeightTabs[x].i0; xs < xWeightTabs[x].i1; xs++) { - weight = *xweight; - red += (int)(weight) * (raccum[xs] >> BITS_OF_CHANEL); - green += (int)(weight) * (gaccum[xs] >> BITS_OF_CHANEL); - blue += (int)(weight) * (baccum[xs] >> BITS_OF_CHANEL); - xweight++; - } - *ptr++ = U8(blue >> FINALSHIFT); - *ptr++ = U8(green >> FINALSHIFT); - *ptr++ = U8(red >> FINALSHIFT); - ptr++; - } - ptrs += bytesPerScaledRow; - } -} - -Rect ScaledPixelBuffer::calculateScaleBoundary(const Rect& r) { - int x_start, y_start, x_end, y_end; - double translate_x = 0.5*scale_ratio_x - 0.5; - double translate_y = 0.5*scale_ratio_y - 0.5; - double sourceXScale = __rfbmax(1.0, 1.0/scale_ratio_x); - double sourceYScale = __rfbmax(1.0, 1.0/scale_ratio_y); - double sourceXRadius = __rfbmax(0.5, sourceXScale*scaleFilters[scaleFilterID].radius); - double sourceYRadius = __rfbmax(0.5, sourceYScale*scaleFilters[scaleFilterID].radius); - x_start = (int)ceil(scale_ratio_x*(r.tl.x-sourceXRadius) + translate_x + SCALE_ERROR); - y_start = (int)ceil(scale_ratio_y*(r.tl.y-sourceYRadius) + translate_y + SCALE_ERROR); - x_end = (int)floor(scale_ratio_x*((r.br.x-1)+sourceXRadius) + translate_x - SCALE_ERROR) + 1; - y_end = (int)floor(scale_ratio_y*((r.br.y-1)+sourceXRadius) + translate_y - SCALE_ERROR) + 1; - if (x_start < 0) x_start = 0; - if (y_start < 0) y_start = 0; - if (x_end > scaled_width) x_end = scaled_width; - if (y_end > scaled_height) y_end = scaled_height; - return Rect(x_start, y_start, x_end, y_end); -} - -void ScaledPixelBuffer::calculateScaledBufferSize() { - double scale_ratio = (double)scale / 100; - scaled_width = (int)ceil(src_width * scale_ratio); - scaled_height = (int)ceil(src_height * scale_ratio); - scale_ratio_x = (double)scaled_width / src_width; - scale_ratio_y = (double)scaled_height / src_height; -} |