src/pagespeed/kernel/image/image_frame_interface.cc

/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Author: Victor Chudnovsky

#include "base/logging.h"
#include "pagespeed/kernel/base/string_util.h"
#include "pagespeed/kernel/image/image_frame_interface.h"
#include "pagespeed/kernel/image/image_util.h"

namespace pagespeed {

namespace image_compression {

////////// ImageSpec

ImageSpec::ImageSpec() {
    Reset();
}

void ImageSpec::Reset() {
    width = 0;
    height = 0;
    num_frames = 0;
    loop_count = 1;
    memset(bg_color, 0, sizeof(bg_color));
    use_bg_color = true;
    image_size_adjusted = false;
}

size_px ImageSpec::TruncateXIndex(const size_px x) const {
  if (x > width) {
    return width;
  }
  return x;
}

size_px ImageSpec::TruncateYIndex(const size_px y) const {
  if (y > height) {
    return height;
  }
  return y;
}

bool ImageSpec::CanContainFrame(const FrameSpec& frame_spec) const {
  return ((frame_spec.left + frame_spec.width <= width) &&
          (frame_spec.top + frame_spec.height <= height));
}

GoogleString ImageSpec::ToString() const {
  return StringPrintf(
      "Image: %d x %d : %u frames, repeated %u times; "
      "bg_color: %s, RGBA: 0x%08X",
      width, height, num_frames, loop_count,
      use_bg_color ? "ON":"OFF", RgbaToPackedArgb(bg_color));
}

bool ImageSpec::Equals(const ImageSpec& other) const {
  return ((width == other.width) &&
          (height == other.height) &&
          (num_frames == other.num_frames) &&
          (loop_count == other.loop_count) &&
          (memcmp(bg_color, other.bg_color, sizeof(bg_color)) == 0) &&
          (use_bg_color == other.use_bg_color) &&
          (image_size_adjusted == other.image_size_adjusted));
}

////////// FrameSpec

FrameSpec::FrameSpec() {
    Reset();
}

void  FrameSpec::Reset() {
  width = 0;
  height = 0;
  top = 0;
  left = 0;

  pixel_format = UNSUPPORTED;
  duration_ms = 0;
  disposal = DISPOSAL_NONE;
  hint_progressive = false;
}

GoogleString FrameSpec::ToString() const {
  return StringPrintf(
      "Frame: size %u x %u at (%u, %u) "
      "pixel_format: %s, duration_ms: %lu, disposal: %d, progressive: %s",
      width, height, top, left, GetPixelFormatString(pixel_format),
      static_cast<unsigned long>(duration_ms), disposal,
      (hint_progressive ? "yes" : "no"));
}

bool FrameSpec::Equals(const FrameSpec& other) const {
  return ((width == other.width) &&
          (height == other.height) &&
          (top == other.top) &&
          (left == other.left) &&
          (pixel_format == other.pixel_format) &&
          (duration_ms == other.duration_ms) &&
          (disposal == other.disposal) &&
          (hint_progressive == other.hint_progressive));
}

////////// MultipleFrameReader

MultipleFrameReader::MultipleFrameReader(MessageHandler* const handler)
    : image_buffer_(NULL), buffer_length_(0), message_handler_(handler),
      quirks_mode_(QUIRKS_NONE) {
  CHECK(handler != NULL);
}

MultipleFrameReader::~MultipleFrameReader() {
}

////////// MultipleFrameWriter

MultipleFrameWriter::MultipleFrameWriter(MessageHandler* const handler)
    : message_handler_(handler) {
  CHECK(handler != NULL);
}

MultipleFrameWriter::~MultipleFrameWriter() {
}

}  // namespace image_compression

}  // namespace pagespeed