* @return Aspect value given by the camera view dimensions. */

* @return Attenuation coefficients for basic formula. From 0 to 2: c1, c2, c3, where c3 is related to the squared radius. */

* @return Lowest corner of a canonical view volume in x and y. */

Outputs whitepoint and matrix to go from the icc or info profile (depending on what was in the PNG) to XYZ, without applying any (rendering intent rel

Get the matrix to go from linear RGB to XYZ given the RGB whitepoint and chromaticities in XYZ colorspace */

* @return Number of channels of image. */

* @return Distance where factorC attenuation value is reached. */

* @return Distance range (minimum -> x, maximum -> y) for distance formula. */

* @return Phong exponent. */

* @return Exponent SE for Pixar formula. */

* @return Attenuation factor C in Pixar formula. */

* @return Field of view in the y axis. */

* @return Height of image. */

Unsigned

* @brief ID provided by OpenGL for this framebuffer. */

* @return K0 and K1 coefficients from Pixar attenuation formula. */

* @return Maximum attenuation factor. */

Get number of color channels for a given PNG color type

* @return Angle, in degrees, which marks the boundary between fading out area and lighted area. */

Similar to getPixelColorRGBA8, but with all the for loops inside of the color mode test cases, optimized to convert the colors much faster, when conve

* @return */

get the tree of a deflated block with dynamic tree, the tree itself is also Huffman compressed with a known tree*/

* @return Width of image. */

* @return Maximum z on the camera system coordinate until the scene is discarded. */

* @return Minimum z on the camera system coordinate until the scene is taken into account. */

ICC tone response curve, nonlinear (encoded) to linear. Input and output in range 0-1. If color was integer 0-255, multiply with (1.0f/255) to get the

inflate a block with dynamic of fixed Huffman tree*/

Returns whether the color chunks in info represent the default PNG sRGB, which is when either no colorometry fields are present at all, or an srgb fie

same as set but does not delete */

load file into buffer that already has the correct allocated size. Returns error code.*/

stats must already have been inited. */

Converts a single rgb color without alpha from one type to another, color bits truncated to their bitdepth. In case of single channel (gray or palette

returns negative value on error. This should be pure C compatible, so no fstat. */

Paeth predicter, used by PNG filter type 4 The parameters are of type short, but should come from unsigned chars, the shorts are only needed to make t

out must be buffer big enough to contain uncompressed IDAT chunk data, and in must contain the full image. return value is error**/

background color chunk (bKGD)*/

international text chunk (iTXt)*/

text chunk (tEXt)*/

compressed text chunk (zTXt)*/

* Read next directory entry into called-allocated buffer. * * Returns zero on success. If the end of directory stream is reached, then * sets resu