+++ /dev/null
-/**************************************************************************
- *
- * Copyright 2011 Jose Fonseca
- * Copyright 2008-2010 VMware, Inc.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- *
- **************************************************************************/
-
-
-#include <assert.h>
-#include <string.h>
-#include <stdint.h>
-#include <stdio.h>
-
-#include "image.hpp"
-
-
-namespace image {
-
-/**
- * http://en.wikipedia.org/wiki/Netpbm_format
- * http://netpbm.sourceforge.net/doc/ppm.html
- */
-void
-Image::writePNM(std::ostream &os, const char *comment) const {
- assert(channels == 1 || channels >= 3);
-
- os << (channels == 1 ? "P5" : "P6") << "\n";
- if (comment) {
- os << "#" << comment << "\n";
- }
- os << width << " " << height << "\n";
- os << "255" << "\n";
-
- const unsigned char *row;
-
- if (channels == 1 || channels == 3) {
- for (row = start(); row != end(); row += stride()) {
- os.write((const char *)row, width*channels);
- }
- } else {
- unsigned char *tmp = new unsigned char[width*3];
- if (channels == 4) {
- for (row = start(); row != end(); row += stride()) {
- const uint32_t *src = (const uint32_t *)row;
- uint32_t *dst = (uint32_t *)tmp;
- unsigned x;
- for (x = 0; x + 4 <= width; x += 4) {
- /*
- * It's much faster to access dwords than bytes.
- *
- * FIXME: Big-endian version.
- */
-
- uint32_t rgba0 = *src++ & 0xffffff;
- uint32_t rgba1 = *src++ & 0xffffff;
- uint32_t rgba2 = *src++ & 0xffffff;
- uint32_t rgba3 = *src++ & 0xffffff;
- uint32_t rgb0 = rgba0
- | (rgba1 << 24);
- uint32_t rgb1 = (rgba1 >> 8)
- | (rgba2 << 16);
- uint32_t rgb2 = (rgba2 >> 16)
- | (rgba3 << 8);
- *dst++ = rgb0;
- *dst++ = rgb1;
- *dst++ = rgb2;
- }
- for (; x < width; ++x) {
- tmp[x*3 + 0] = row[x*4 + 0];
- tmp[x*3 + 1] = row[x*4 + 1];
- tmp[x*3 + 2] = row[x*4 + 2];
- }
- os.write((const char *)tmp, width*3);
- }
- } else if (channels == 2) {
- for (row = start(); row != end(); row += stride()) {
- const unsigned char *src = row;
- unsigned char *dst = tmp;
- for (unsigned x = 0; x < width; ++x) {
- *dst++ = *src++;
- *dst++ = *src++;
- *dst++ = 0;
- }
- os.write((const char *)tmp, width*3);
- }
- } else {
- assert(0);
- }
- delete [] tmp;
- }
-}
-
-const char *
-readPNMHeader(const char *buffer, size_t bufferSize, unsigned *channels, unsigned *width, unsigned *height)
-{
- *channels = 0;
- *width = 0;
- *height = 0;
-
- const char *currentBuffer = buffer;
- const char *nextBuffer;
-
- // parse number of channels
- int scannedChannels = sscanf(currentBuffer, "P%d\n", channels);
- if (scannedChannels != 1) { // validate scanning of channels
- // invalid channel line
- return buffer;
- }
- // convert channel token to number of channels
- *channels = (*channels == 5) ? 1 : 3;
-
- // advance past channel line
- nextBuffer = (const char *) memchr((const void *) currentBuffer, '\n', bufferSize) + 1;
- bufferSize -= nextBuffer - currentBuffer;
- currentBuffer = nextBuffer;
-
- // skip over optional comment
- if (*currentBuffer == '#') {
- // advance past comment line
- nextBuffer = (const char *) memchr((const void *) currentBuffer, '\n', bufferSize) + 1;
- bufferSize -= nextBuffer - currentBuffer;
- currentBuffer = nextBuffer;
- }
-
- // parse dimensions of image
- int scannedDimensions = sscanf(currentBuffer, "%d %d\n", width, height);
- if (scannedDimensions != 2) { // validate scanning of dimensions
- // invalid dimension line
- return buffer;
- }
-
- // advance past dimension line
- nextBuffer = (const char *) memchr((const void *) currentBuffer, '\n', bufferSize) + 1;
- bufferSize -= nextBuffer - currentBuffer;
- currentBuffer = nextBuffer;
-
- // skip over "255\n" at end of header
- nextBuffer = (const char *) memchr((const void *) currentBuffer, '\n', bufferSize) + 1;
-
- // return start of image data
- return nextBuffer;
-}
-
-} /* namespace image */
projects / apitrace / blobdiff