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stb_image: Update comments.

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Fabian Giesen 2014-12-24 10:07:52 +01:00
parent 7f94e7e591
commit fb109abeaf
1 changed files with 5 additions and 10 deletions
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15
stb_image.h
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@ -13,7 +13,7 @@
Primarily of interest to game developers and other people who can Primarily of interest to game developers and other people who can
avoid problematic images and only need the trivial interface avoid problematic images and only need the trivial interface
JPEG baseline & progressive (no arithmetic) JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
PNG 1/2/4/8-bit-per-channel (16 bpc not supported) PNG 1/2/4/8-bit-per-channel (16 bpc not supported)
TGA (not sure what subset, if a subset) TGA (not sure what subset, if a subset)
@ -197,9 +197,9 @@ License:
// DOCUMENTATION // DOCUMENTATION
// //
// Limitations: // Limitations:
// - no jpeg progressive support
// - no 16-bit-per-channel PNG // - no 16-bit-per-channel PNG
// - no 12-bit-per-channel JPEG // - no 12-bit-per-channel JPEG
// - no JPEGs with arithmetic coding
// - no 1-bit BMP // - no 1-bit BMP
// - GIF always returns *comp=4 // - GIF always returns *comp=4
// //
@ -669,6 +669,7 @@ static int stbi__sse2_available()
#ifdef STBI_NEON #ifdef STBI_NEON
#include <arm_neon.h> #include <arm_neon.h>
// assume GCC or Clang on ARM targets
#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16))) #define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
#endif #endif
@ -1293,10 +1294,9 @@ static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp)
////////////////////////////////////////////////////////////////////////////// //////////////////////////////////////////////////////////////////////////////
// //
// "baseline" JPEG/JFIF decoder (not actually fully baseline implementation) // "baseline" JPEG/JFIF decoder
// //
// simple implementation // simple implementation
// - channel subsampling of at most 2 in each dimension
// - doesn't support delayed output of y-dimension // - doesn't support delayed output of y-dimension
// - simple interface (only one output format: 8-bit interleaved RGB) // - simple interface (only one output format: 8-bit interleaved RGB)
// - doesn't try to recover corrupt jpegs // - doesn't try to recover corrupt jpegs
@ -1310,13 +1310,8 @@ static stbi_uc *stbi__hdr_to_ldr(float *data, int x, int y, int comp)
// - quality integer IDCT derived from IJG's 'slow' // - quality integer IDCT derived from IJG's 'slow'
// performance // performance
// - fast huffman; reasonable integer IDCT // - fast huffman; reasonable integer IDCT
// - some SIMD kernels for common paths on targets with SSE2/NEON
// - uses a lot of intermediate memory, could cache poorly // - uses a lot of intermediate memory, could cache poorly
// - load http://nothings.org/remote/anemones.jpg 3 times on 2.8Ghz P4
// stb_jpeg: 1.34 seconds (MSVC6, default release build)
// stb_jpeg: 1.06 seconds (MSVC6, processor = Pentium Pro)
// IJL11.dll: 1.08 seconds (compiled by intel)
// IJG 1998: 0.98 seconds (MSVC6, makefile provided by IJG)
// IJG 1998: 0.95 seconds (MSVC6, makefile + proc=PPro)
#ifndef STBI_NO_JPEG #ifndef STBI_NO_JPEG