C++ (Cpp) qcms_profile_create_rgb_with_gamma Examples

Example #1

File: malloc-fail.c Project: bgirard/qcms

void do_test(void) {
	unsigned char srct[4] = { 221, 79, 129, 92};
	unsigned char outt[4];
	qcms_transform *transform;
	qcms_profile *input_profile, *output_profile, *rgb;
	qcms_CIE_xyY white_point = { 0, 0, 1.};
	qcms_CIE_xyYTRIPLE primaries = { {.9, .3, 1.}, {.2, .4, 1.}, {.7, .4, 1.}};

	rgb = qcms_profile_create_rgb_with_gamma(white_point, primaries, 1.8);
	input_profile = qcms_profile_sRGB();
	output_profile = qcms_profile_sRGB();
	if (output_profile) {
		test_gray(output_profile);
		test_gray_precache(output_profile);
		qcms_profile_release(output_profile);
	}
	if (input_profile)
		qcms_profile_release(input_profile);
	if (rgb)
		qcms_profile_release(rgb);
	rgb = qcms_profile_from_path("sample-trunc.icc");
	if (rgb)
		qcms_profile_release(rgb);
}

Example #2

File: nsPNGDecoder.cpp Project: hobinjk/gecko-dev

// Adapted from http://www.littlecms.com/pngchrm.c example code
static qcms_profile*
PNGGetColorProfile(png_structp png_ptr, png_infop info_ptr,
                   int color_type, qcms_data_type* inType, uint32_t* intent)
{
  qcms_profile* profile = nullptr;
  *intent = QCMS_INTENT_PERCEPTUAL; // Our default

  // First try to see if iCCP chunk is present
  if (png_get_valid(png_ptr, info_ptr, PNG_INFO_iCCP)) {
    png_uint_32 profileLen;
    png_bytep profileData;
    png_charp profileName;
    int compression;

    png_get_iCCP(png_ptr, info_ptr, &profileName, &compression,
                 &profileData, &profileLen);

    profile = qcms_profile_from_memory((char*)profileData, profileLen);
    if (profile) {
      uint32_t profileSpace = qcms_profile_get_color_space(profile);

      bool mismatch = false;
      if (color_type & PNG_COLOR_MASK_COLOR) {
        if (profileSpace != icSigRgbData) {
          mismatch = true;
        }
      } else {
        if (profileSpace == icSigRgbData) {
          png_set_gray_to_rgb(png_ptr);
        } else if (profileSpace != icSigGrayData) {
          mismatch = true;
        }
      }

      if (mismatch) {
        qcms_profile_release(profile);
        profile = nullptr;
      } else {
        *intent = qcms_profile_get_rendering_intent(profile);
      }
    }
  }

  // Check sRGB chunk
  if (!profile && png_get_valid(png_ptr, info_ptr, PNG_INFO_sRGB)) {
    profile = qcms_profile_sRGB();

    if (profile) {
      int fileIntent;
      png_set_gray_to_rgb(png_ptr);
      png_get_sRGB(png_ptr, info_ptr, &fileIntent);
      uint32_t map[] = { QCMS_INTENT_PERCEPTUAL,
                         QCMS_INTENT_RELATIVE_COLORIMETRIC,
                         QCMS_INTENT_SATURATION,
                         QCMS_INTENT_ABSOLUTE_COLORIMETRIC };
      *intent = map[fileIntent];
    }
  }

  // Check gAMA/cHRM chunks
  if (!profile &&
       png_get_valid(png_ptr, info_ptr, PNG_INFO_gAMA) &&
       png_get_valid(png_ptr, info_ptr, PNG_INFO_cHRM)) {
    qcms_CIE_xyYTRIPLE primaries;
    qcms_CIE_xyY whitePoint;

    png_get_cHRM(png_ptr, info_ptr,
                 &whitePoint.x, &whitePoint.y,
                 &primaries.red.x,   &primaries.red.y,
                 &primaries.green.x, &primaries.green.y,
                 &primaries.blue.x,  &primaries.blue.y);
    whitePoint.Y =
      primaries.red.Y = primaries.green.Y = primaries.blue.Y = 1.0;

    double gammaOfFile;

    png_get_gAMA(png_ptr, info_ptr, &gammaOfFile);

    profile = qcms_profile_create_rgb_with_gamma(whitePoint, primaries,
                                                 1.0/gammaOfFile);

    if (profile) {
      png_set_gray_to_rgb(png_ptr);
    }
  }

  if (profile) {
    uint32_t profileSpace = qcms_profile_get_color_space(profile);
    if (profileSpace == icSigGrayData) {
      if (color_type & PNG_COLOR_MASK_ALPHA) {
        *inType = QCMS_DATA_GRAYA_8;
      } else {
        *inType = QCMS_DATA_GRAY_8;
      }
    } else {
      if (color_type & PNG_COLOR_MASK_ALPHA ||
          png_get_valid(png_ptr, info_ptr, PNG_INFO_tRNS)) {
        *inType = QCMS_DATA_RGBA_8;
      } else {
        *inType = QCMS_DATA_RGB_8;
      }
    }
  }

  return profile;
}