mirror of https://github.com/nothings/stb.git
Merge branch 'master' of https://github.com/nothings/stb
This commit is contained in:
Ken Miller
commit
2834d9da08
|
|
@ -7,13 +7,15 @@ library | lastest version | category | description
|
|||
--------------------- | ---- | -------- | --------------------------------
|
||||
**stb_vorbis.c** | 1.04 | audio | decode ogg vorbis files from file/memory to float/16-bit signed output
|
||||
**stb_image.h** | 1.46 | graphics | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
|
||||
**stb_truetype.h** | 0.9 | graphics | parse, decode, and rasterize characters from truetype fonts
|
||||
**stb_truetype.h** | 0.99 | graphics | parse, decode, and rasterize characters from truetype fonts
|
||||
**stb_image_write.h** | 0.95 | graphics | image writing to disk: PNG, TGA, BMP
|
||||
**stb_image_resize.h** | 0.90 | graphics | resize images larger/smaller with good quality
|
||||
**stretchy_buffer.h** | 1.01 | utility | typesafe dynamic array for C (i.e. approximation to vector<>), doesn't compile as C++
|
||||
**stb_textedit.h** | 1.5 | UI | guts of a text editor for games etc implementing them from scratch
|
||||
**stb_dxt.h** | 1.04 | 3D graphics | Fabian "ryg" Giesen's real-time DXT compressor
|
||||
**stb_herringbone_wang_tile.h** | 0.6 | games | herringbone Wang tile map generator
|
||||
**stb_perlin.h** | 0.2 | 3D graphics | revised Perlin noise (3D input, 1D output)
|
||||
**stb_tilemap_editor.h** | 0.10 | games | embeddable tilemap editor
|
||||
**stb_herringbone_wang_tile.h** | 0.6 | games | herringbone Wang tile map generator
|
||||
**stb_c_lexer.h** | 0.06 | parsing | simplify writing parsers for C-like languages
|
||||
**stb_divide.h** | 0.91 | math | more useful 32-bit modulus e.g. "euclidean divide"
|
||||
**stb.h** | 2.23 | misc | helper functions for C, mostly redundant in C++; basically author's personal stuff
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|
|
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@ -1,192 +0,0 @@
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|||
1.
|
||||
|
||||
Consider just porting this C++ public domain
|
||||
library back to C:
|
||||
https://code.google.com/p/imageresampler/source/browse/#svn%2Ftrunk
|
||||
(recommended by @castano)
|
||||
|
||||
|
||||
2.
|
||||
|
||||
Consider three cases just to suggest the spectrum
|
||||
of possiblities:
|
||||
|
||||
a) linear upsample: each output pixel is a weighted sum
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of 4 input pixels
|
||||
|
||||
b) cubic upsample: each output pixel is a weighted sum
|
||||
of 16 input pixels
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|
||||
c) downsample by N with box filter: each output pixel
|
||||
is a weighted sum of NxN input pixels, N can be very large
|
||||
|
||||
Now, suppose you want to handle 8-bit input, 16-bit
|
||||
input, and float input, and you want to do sRGB correction
|
||||
or not.
|
||||
|
||||
Suppose you create a temporary buffer of float pixels, say
|
||||
one scanline tall. Actually two temp buffers, one for the
|
||||
input and one for the output. You decode a scanline of the
|
||||
input into the temp buffer which is always linear floats. This
|
||||
isolates the handling of 8/16/float and sRGB to one place
|
||||
(and still allows you to make optimized 8-bit-sRGB-to-float
|
||||
lookup tables). This also allows you to put wrap logic here,
|
||||
explicitly wrapping, reflecting, or replicating-from-edge
|
||||
pixels that would come from off-edge.
|
||||
|
||||
You then do whatever the appropriate weighted sums are
|
||||
into the output buffer, and you move on to the next
|
||||
scanline of the input.
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||||
|
||||
The algorithm just described works directly for case (c).
|
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Suppose you're downsampling by 2.5; then output scanline 0
|
||||
sums from input scanlines 0, 1, and 2; output scanline 1
|
||||
sums from 2,3,4; output 2 from 5,6,7; output 3 from 7,8,9.
|
||||
Note how 2 & 7 get reused, but we don't have to recompute
|
||||
them because we can do things in a single linear pass
|
||||
through the input and output at the same time.
|
||||
|
||||
Now, consider case (a). When upsampling, the same two input
|
||||
scanlines will get sampled-from for multiple output scanlines.
|
||||
So, to avoid recomputing the input scanlines, we need either
|
||||
multiple input or multiple output temp buffer lines. Since
|
||||
the number of output lines a given pair of input scanlines
|
||||
might touch scales with the upsample amount, it makes more
|
||||
sense to use two input scanline buffers. For cubic, you'll
|
||||
need four scanline buffers, and in general the number of
|
||||
buffers will be limited by the max filter width, which is
|
||||
presumably hardcoded.
|
||||
|
||||
It turns out to be slightly different for two reasons:
|
||||
|
||||
1. when using an arbitrary filter and downsampling,
|
||||
you actually need N output buffers and 1 input buffer
|
||||
(vs 1 output buffer and N input buffers upsampling)
|
||||
|
||||
2. this approach will be very inefficient as written.
|
||||
you want to use separable filters and actually do
|
||||
seperable computation: first decode an input scanline
|
||||
into a 'decode' buffer, then horizontally resample it
|
||||
into the "input" buffer (kind of a misnomer, but
|
||||
they're the inputs to the vertical resampler)
|
||||
|
||||
(The above approach isn't optimal for non-uniform resampling;
|
||||
optimal is to do whichever axis is smaller first, but I don't
|
||||
think we have to care about doing that right.)
|
||||
|
||||
|
||||
Now, you can either:
|
||||
|
||||
1. malloc the temp memory
|
||||
2. alloca it
|
||||
3. allocate a fixed amount on the stack
|
||||
4. let the user pass it in
|
||||
|
||||
I forbid #2 in stb libraries for portability.
|
||||
|
||||
If you're not allocating the output image, but rather requiring
|
||||
the user to pass it in, it's probably worth trying to avoid #1
|
||||
because people always want to use stb libs without any memory
|
||||
allocations for various reason. (Note that most stb libs go
|
||||
crazy with memory allocations--you shouldn't use stb_image
|
||||
in a console game--but I've tried to avoid it more in newer
|
||||
libs.)
|
||||
|
||||
The way #3 would work is instead of using a scanline-width
|
||||
temp buffer, use some fixed-width temp buffer that's W pixels,
|
||||
and scale the image in vertical stripes that are that wide.
|
||||
Suppose you make the temp buffers 256 wide; then an upsample
|
||||
by 8 computes 256-pixel-width strips (from ~32-pixel-wide input
|
||||
strips), but a downsample by 8 computes ~32-pixel-width
|
||||
strips (from a 256-pixel width strip). Note this limits
|
||||
the max down/upsampling to be ballpark 256x along the
|
||||
horizontal axis.
|
||||
|
||||
In the following, I do #3 and allow #4 for cases where #3 is
|
||||
too small, but it's not the only possibility:
|
||||
|
||||
|
||||
|
||||
Function prototypes:
|
||||
|
||||
the highest-level one could be:
|
||||
|
||||
stb_resample_8bit(uint8_t *dest, int dest_width, int dest_height,
|
||||
uint8_t const *src , int src_width, int src_height,
|
||||
int channels,
|
||||
stbr_filter filter);
|
||||
|
||||
the lowest-level one could be:
|
||||
|
||||
stb_resample_arbitrary(void *dst, stbr_type dst_type, int dst_width, int dst_height, int dst_stride_in_bytes,
|
||||
void const *src, stbr_type src_type, int src_width, int src_height, int src_stride_in_bytes,
|
||||
float s0, float t0, float s1, float t1, // range of source to use, 0..1 in GPU texture-coordinate style
|
||||
int channels,
|
||||
int nonpremul_alpha_channel_index,
|
||||
stbr_wrapmode wrap, // clamp, wrap, mirror
|
||||
stbr_filter filter,
|
||||
void *tempmem, size_t tempmem_size_in_bytes);
|
||||
|
||||
And there would be a bunch of convenience functions in-between those two levels.
|
||||
|
||||
|
||||
Some notes:
|
||||
|
||||
s0,t0,s1,t1:
|
||||
this allows fine subpixel-positioning and subpixel-resizing in an explicit way without
|
||||
things having to be exact pixel multiples. it allows people to pseudo-stream
|
||||
images by computing "tiles" of images a bit at a time without forcing those
|
||||
tiles to quantize their source data.
|
||||
|
||||
nonpremul_alpha_channel_index:
|
||||
if this is negative, no channels are processed specially
|
||||
if this is non-negative, then it's the index of the alpha channel,
|
||||
and the image should be treated as non-premultiplied alpha that
|
||||
needs to be resampled accounting for this (weight the sampling
|
||||
by the alpha channel, i.e. premultiply, filter, unpremultiply).
|
||||
this mechanism only allows one alpha channel and ALL channels
|
||||
are scaled by it; an alternative would be to find some way to
|
||||
pass in which channels serve as alpha channels for which other
|
||||
channels, but eh.
|
||||
|
||||
tempmem, tempmem_size:
|
||||
all functions will needed tempmem, but they can allocate a fixed tempmem buffer
|
||||
on the stack. providing an API that allows overriding the amount of tempmem
|
||||
available allows people to process arbitrarily large images. the return
|
||||
value for the function could be 0 on success or non-0 being the size of
|
||||
tempmem needed.
|
||||
|
||||
src_stride, dest_stride:
|
||||
the stride variables are signed to allow you to describe both traditional
|
||||
top-to-bottom images (pass in a pointer to the top-left pixel and
|
||||
a positive stride) and bottom-to-top images (pass in a pointer to
|
||||
the bottom-left pixel and a negative stride)
|
||||
|
||||
ordering of src & dest:
|
||||
put these in whatever order you like, i just chose one arbitrarily
|
||||
|
||||
width & height
|
||||
these are ints not unsigned ints or size_ts because i personally forbid
|
||||
unsigned variables for almost everything to avoid signed/unsigned comparison
|
||||
issues, but this is a matter of personal taste and you can do differently
|
||||
|
||||
Intermediate-level functions should be provided for each source type & same dest type
|
||||
so that the code is typesafe; only when people fall back to stb_resample_arbitrary should
|
||||
they be at risk for type unsafety. (One way to deal avoid an explosion of functions of
|
||||
every possible *combination* of types in a type-safe way would be to define one function
|
||||
for each input type, and accept three separate output pointers, one for each type, only
|
||||
one of which can be non-NULL. 9 functions isn't that bad, but if you want to have three
|
||||
or four intermediate-level functions with fewer parameters, 9*4 gets silly. Could also
|
||||
use the same trick for stb_resample_arbitrary, replacing it with three typesafe functions.)
|
||||
|
||||
|
||||
|
||||
|
||||
Reference:
|
||||
|
||||
Cubic sampling function for seperable cubic:
|
||||
f(x) = (a+2)*x^3 - (a+3)*x^2 + 1 for 0 <= x <= 1
|
||||
f(x) = a*x^3 - 5*a*x^2 + 8*a*x - 4*a for 1 < x <= 2
|
||||
f(x) = 0 otherwise
|
||||
"a" is configurable, try -1/2 (from http://pixinsight.com/forum/index.php?topic=556.0 )
|
||||
|
||||
File diff suppressed because it is too large
Load Diff
File diff suppressed because it is too large
Load Diff
|
|
@ -1,5 +1,5 @@
|
|||
// stb_truetype.h - v0.9 - public domain
|
||||
// authored from 2009-2013 by Sean Barrett / RAD Game Tools
|
||||
// stb_truetype.h - v0.99 - public domain
|
||||
// authored from 2009-2014 by Sean Barrett / RAD Game Tools
|
||||
//
|
||||
// This library processes TrueType files:
|
||||
// parse files
|
||||
|
|
@ -21,7 +21,7 @@
|
|||
// Mikko Mononen: compound shape support, more cmap formats
|
||||
// Tor Andersson: kerning, subpixel rendering
|
||||
//
|
||||
// Bug/warning reports:
|
||||
// Bug/warning reports/fixes:
|
||||
// "Zer" on mollyrocket (with fix)
|
||||
// Cass Everitt
|
||||
// stoiko (Haemimont Games)
|
||||
|
|
@ -33,9 +33,11 @@
|
|||
// Anthony Pesch
|
||||
// Johan Duparc
|
||||
// Hou Qiming
|
||||
// Fabian "ryg" Giesen
|
||||
//
|
||||
// VERSION HISTORY
|
||||
//
|
||||
// 0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)
|
||||
// 0.9 (2014-08-07) support certain mac/iOS fonts without an MS platformID
|
||||
// 0.8b (2014-07-07) fix a warning
|
||||
// 0.8 (2014-05-25) fix a few more warnings
|
||||
|
|
@ -1385,14 +1387,21 @@ void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
|
|||
void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
||||
{
|
||||
int x0,y0,x1,y1;
|
||||
if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1))
|
||||
x0=y0=x1=y1=0; // e.g. space character
|
||||
// now move to integral bboxes (treating pixels as little squares, what pixels get touched)?
|
||||
if (ix0) *ix0 = STBTT_ifloor(x0 * scale_x + shift_x);
|
||||
if (iy0) *iy0 = -STBTT_iceil (y1 * scale_y + shift_y);
|
||||
if (ix1) *ix1 = STBTT_iceil (x1 * scale_x + shift_x);
|
||||
if (iy1) *iy1 = -STBTT_ifloor(y0 * scale_y + shift_y);
|
||||
if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
|
||||
// e.g. space character
|
||||
if (ix0) *ix0 = 0;
|
||||
if (iy0) *iy0 = 0;
|
||||
if (ix1) *ix1 = 0;
|
||||
if (iy1) *iy1 = 0;
|
||||
} else {
|
||||
// move to integral bboxes (treating pixels as little squares, what pixels get touched)?
|
||||
if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x);
|
||||
if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y);
|
||||
if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x);
|
||||
if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y);
|
||||
}
|
||||
}
|
||||
|
||||
void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
|
||||
{
|
||||
stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
|
||||
|
|
@ -1639,9 +1648,9 @@ static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcou
|
|||
a=j,b=k;
|
||||
}
|
||||
e[n].x0 = p[a].x * scale_x + shift_x;
|
||||
e[n].y0 = p[a].y * y_scale_inv * vsubsample + shift_y;
|
||||
e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
|
||||
e[n].x1 = p[b].x * scale_x + shift_x;
|
||||
e[n].y1 = p[b].y * y_scale_inv * vsubsample + shift_y;
|
||||
e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
|
||||
++n;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -0,0 +1,983 @@
|
|||
#include <malloc.h>
|
||||
|
||||
#if defined(_WIN32) && _MSC_VER > 1200
|
||||
#define STBIR_ASSERT(x) \
|
||||
if (!(x)) { \
|
||||
__debugbreak(); \
|
||||
} else
|
||||
#else
|
||||
#include <assert.h>
|
||||
#define STBIR_ASSERT(x) assert(x)
|
||||
#endif
|
||||
|
||||
#define STBIR_MALLOC stbir_malloc
|
||||
#define STBIR_FREE stbir_free
|
||||
|
||||
class stbir_context {
|
||||
public:
|
||||
stbir_context()
|
||||
{
|
||||
size = 1000000;
|
||||
memory = malloc(size);
|
||||
}
|
||||
|
||||
~stbir_context()
|
||||
{
|
||||
free(memory);
|
||||
}
|
||||
|
||||
size_t size;
|
||||
void* memory;
|
||||
} g_context;
|
||||
|
||||
void* stbir_malloc(size_t size, void* context)
|
||||
{
|
||||
if (!context)
|
||||
return malloc(size);
|
||||
|
||||
stbir_context* real_context = (stbir_context*)context;
|
||||
if (size > real_context->size)
|
||||
return 0;
|
||||
|
||||
return real_context->memory;
|
||||
}
|
||||
|
||||
void stbir_free(void* memory, void* context)
|
||||
{
|
||||
if (!context)
|
||||
free(memory);
|
||||
}
|
||||
|
||||
//#include <stdio.h>
|
||||
void stbir_progress(float p)
|
||||
{
|
||||
//printf("%f\n", p);
|
||||
STBIR_ASSERT(p >= 0 && p <= 1);
|
||||
}
|
||||
|
||||
#define STBIR_PROGRESS_REPORT stbir_progress
|
||||
|
||||
#define STB_IMAGE_RESIZE_IMPLEMENTATION
|
||||
#define STB_IMAGE_RESIZE_STATIC
|
||||
#include "stb_image_resize.h"
|
||||
|
||||
#define STB_IMAGE_WRITE_IMPLEMENTATION
|
||||
#include "stb_image_write.h"
|
||||
|
||||
#define STB_IMAGE_IMPLEMENTATION
|
||||
#include "stb_image.h"
|
||||
|
||||
#ifdef _WIN32
|
||||
#include <sys/timeb.h>
|
||||
#endif
|
||||
|
||||
#include <direct.h>
|
||||
|
||||
#define MT_SIZE 624
|
||||
static size_t g_aiMT[MT_SIZE];
|
||||
static size_t g_iMTI = 0;
|
||||
|
||||
// Mersenne Twister implementation from Wikipedia.
|
||||
// Avoiding use of the system rand() to be sure that our tests generate the same test data on any system.
|
||||
void mtsrand(size_t iSeed)
|
||||
{
|
||||
g_aiMT[0] = iSeed;
|
||||
for (size_t i = 1; i < MT_SIZE; i++)
|
||||
{
|
||||
size_t inner1 = g_aiMT[i - 1];
|
||||
size_t inner2 = (g_aiMT[i - 1] >> 30);
|
||||
size_t inner = inner1 ^ inner2;
|
||||
g_aiMT[i] = (0x6c078965 * inner) + i;
|
||||
}
|
||||
|
||||
g_iMTI = 0;
|
||||
}
|
||||
|
||||
size_t mtrand()
|
||||
{
|
||||
if (g_iMTI == 0)
|
||||
{
|
||||
for (size_t i = 0; i < MT_SIZE; i++)
|
||||
{
|
||||
size_t y = (0x80000000 & (g_aiMT[i])) + (0x7fffffff & (g_aiMT[(i + 1) % MT_SIZE]));
|
||||
g_aiMT[i] = g_aiMT[(i + 397) % MT_SIZE] ^ (y >> 1);
|
||||
if ((y % 2) == 1)
|
||||
g_aiMT[i] = g_aiMT[i] ^ 0x9908b0df;
|
||||
}
|
||||
}
|
||||
|
||||
size_t y = g_aiMT[g_iMTI];
|
||||
y = y ^ (y >> 11);
|
||||
y = y ^ ((y << 7) & (0x9d2c5680));
|
||||
y = y ^ ((y << 15) & (0xefc60000));
|
||||
y = y ^ (y >> 18);
|
||||
|
||||
g_iMTI = (g_iMTI + 1) % MT_SIZE;
|
||||
|
||||
return y;
|
||||
}
|
||||
|
||||
|
||||
inline float mtfrand()
|
||||
{
|
||||
const int ninenine = 999999;
|
||||
return (float)(mtrand() % ninenine)/ninenine;
|
||||
}
|
||||
|
||||
static void resizer(int argc, char **argv)
|
||||
{
|
||||
unsigned char* input_pixels;
|
||||
unsigned char* output_pixels;
|
||||
int w, h;
|
||||
int n;
|
||||
int out_w, out_h;
|
||||
input_pixels = stbi_load(argv[1], &w, &h, &n, 0);
|
||||
out_w = w*3;
|
||||
out_h = h*3;
|
||||
output_pixels = (unsigned char*) malloc(out_w*out_h*n);
|
||||
//stbir_resize_uint8_srgb(input_pixels, w, h, 0, output_pixels, out_w, out_h, 0, n, -1,0);
|
||||
stbir_resize_uint8(input_pixels, w, h, 0, output_pixels, out_w, out_h, 0, n);
|
||||
stbi_write_png("output.png", out_w, out_h, n, output_pixels, 0);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
static void performance(int argc, char **argv)
|
||||
{
|
||||
unsigned char* input_pixels;
|
||||
unsigned char* output_pixels;
|
||||
int w, h, count;
|
||||
int n, i;
|
||||
int out_w, out_h, srgb=1;
|
||||
input_pixels = stbi_load(argv[1], &w, &h, &n, 0);
|
||||
#if 0
|
||||
out_w = w/4; out_h = h/4; count=100; // 1
|
||||
#elif 0
|
||||
out_w = w*2; out_h = h/4; count=20; // 2 // note this is structured pessimily, would be much faster to downsample vertically first
|
||||
#elif 0
|
||||
out_w = w/4; out_h = h*2; count=50; // 3
|
||||
#elif 0
|
||||
out_w = w*3; out_h = h*3; count=2; srgb=0; // 4
|
||||
#else
|
||||
out_w = w*3; out_h = h*3; count=2; // 5 // this is dominated by linear->sRGB conversion
|
||||
#endif
|
||||
|
||||
output_pixels = (unsigned char*) malloc(out_w*out_h*n);
|
||||
for (i=0; i < count; ++i)
|
||||
if (srgb)
|
||||
stbir_resize_uint8_srgb(input_pixels, w, h, 0, output_pixels, out_w, out_h, 0, n,-1,0);
|
||||
else
|
||||
stbir_resize(input_pixels, w, h, 0, output_pixels, out_w, out_h, 0, STBIR_TYPE_UINT8, n,-1, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
exit(0);
|
||||
}
|
||||
|
||||
void test_suite(int argc, char **argv);
|
||||
|
||||
int main(int argc, char** argv)
|
||||
{
|
||||
//resizer(argc, argv);
|
||||
//performance(argc, argv);
|
||||
|
||||
test_suite(argc, argv);
|
||||
return 0;
|
||||
}
|
||||
|
||||
void resize_image(const char* filename, float width_percent, float height_percent, stbir_filter filter, stbir_edge edge, stbir_colorspace colorspace, const char* output_filename)
|
||||
{
|
||||
int w, h, n;
|
||||
|
||||
unsigned char* input_data = stbi_load(filename, &w, &h, &n, 0);
|
||||
if (!input_data)
|
||||
{
|
||||
printf("Input image could not be loaded\n");
|
||||
return;
|
||||
}
|
||||
|
||||
int out_w = (int)(w * width_percent);
|
||||
int out_h = (int)(h * height_percent);
|
||||
|
||||
unsigned char* output_data = (unsigned char*)malloc(out_w * out_h * n);
|
||||
|
||||
stbir_resize(input_data, w, h, 0, output_data, out_w, out_h, 0, STBIR_TYPE_UINT8, n, STBIR_ALPHA_CHANNEL_NONE, 0, edge, edge, filter, filter, colorspace, &g_context);
|
||||
|
||||
stbi_image_free(input_data);
|
||||
|
||||
stbi_write_png(output_filename, out_w, out_h, n, output_data, 0);
|
||||
|
||||
free(output_data);
|
||||
}
|
||||
|
||||
template <typename F, typename T>
|
||||
void convert_image(const F* input, T* output, int length)
|
||||
{
|
||||
double f = (pow(2.0, 8.0 * sizeof(T)) - 1) / (pow(2.0, 8.0 * sizeof(F)) - 1);
|
||||
for (int i = 0; i < length; i++)
|
||||
output[i] = (T)(((double)input[i]) * f);
|
||||
}
|
||||
|
||||
template <typename T>
|
||||
void test_format(const char* file, float width_percent, float height_percent, stbir_datatype type, stbir_colorspace colorspace)
|
||||
{
|
||||
int w, h, n;
|
||||
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
|
||||
|
||||
if (input_data == NULL)
|
||||
return;
|
||||
|
||||
|
||||
int new_w = (int)(w * width_percent);
|
||||
int new_h = (int)(h * height_percent);
|
||||
|
||||
T* T_data = (T*)malloc(w * h * n * sizeof(T));
|
||||
memset(T_data, 0, w*h*n*sizeof(T));
|
||||
convert_image<unsigned char, T>(input_data, T_data, w * h * n);
|
||||
|
||||
T* output_data = (T*)malloc(new_w * new_h * n * sizeof(T));
|
||||
|
||||
stbir_resize(T_data, w, h, 0, output_data, new_w, new_h, 0, type, n, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, colorspace, &g_context);
|
||||
|
||||
free(T_data);
|
||||
stbi_image_free(input_data);
|
||||
|
||||
unsigned char* char_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(char));
|
||||
convert_image<T, unsigned char>(output_data, char_data, new_w * new_h * n);
|
||||
|
||||
char output[200];
|
||||
sprintf(output, "test-output/type-%d-%d-%d-%d-%s", type, colorspace, new_w, new_h, file);
|
||||
stbi_write_png(output, new_w, new_h, n, char_data, 0);
|
||||
|
||||
free(char_data);
|
||||
free(output_data);
|
||||
}
|
||||
|
||||
void convert_image_float(const unsigned char* input, float* output, int length)
|
||||
{
|
||||
for (int i = 0; i < length; i++)
|
||||
output[i] = ((float)input[i])/255;
|
||||
}
|
||||
|
||||
void convert_image_float(const float* input, unsigned char* output, int length)
|
||||
{
|
||||
for (int i = 0; i < length; i++)
|
||||
output[i] = (unsigned char)(stbir__saturate(input[i]) * 255);
|
||||
}
|
||||
|
||||
void test_float(const char* file, float width_percent, float height_percent, stbir_datatype type, stbir_colorspace colorspace)
|
||||
{
|
||||
int w, h, n;
|
||||
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
|
||||
|
||||
if (input_data == NULL)
|
||||
return;
|
||||
|
||||
int new_w = (int)(w * width_percent);
|
||||
int new_h = (int)(h * height_percent);
|
||||
|
||||
float* T_data = (float*)malloc(w * h * n * sizeof(float));
|
||||
convert_image_float(input_data, T_data, w * h * n);
|
||||
|
||||
float* output_data = (float*)malloc(new_w * new_h * n * sizeof(float));
|
||||
|
||||
stbir_resize_float_generic(T_data, w, h, 0, output_data, new_w, new_h, 0, n, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, colorspace, &g_context);
|
||||
|
||||
free(T_data);
|
||||
stbi_image_free(input_data);
|
||||
|
||||
unsigned char* char_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(char));
|
||||
convert_image_float(output_data, char_data, new_w * new_h * n);
|
||||
|
||||
char output[200];
|
||||
sprintf(output, "test-output/type-%d-%d-%d-%d-%s", type, colorspace, new_w, new_h, file);
|
||||
stbi_write_png(output, new_w, new_h, n, char_data, 0);
|
||||
|
||||
free(char_data);
|
||||
free(output_data);
|
||||
}
|
||||
|
||||
void test_channels(const char* file, float width_percent, float height_percent, int channels)
|
||||
{
|
||||
int w, h, n;
|
||||
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
|
||||
|
||||
if (input_data == NULL)
|
||||
return;
|
||||
|
||||
int new_w = (int)(w * width_percent);
|
||||
int new_h = (int)(h * height_percent);
|
||||
|
||||
unsigned char* channels_data = (unsigned char*)malloc(w * h * channels * sizeof(unsigned char));
|
||||
|
||||
for (int i = 0; i < w * h; i++)
|
||||
{
|
||||
int input_position = i * n;
|
||||
int output_position = i * channels;
|
||||
|
||||
for (int c = 0; c < channels; c++)
|
||||
channels_data[output_position + c] = input_data[input_position + stbir__min(c, n)];
|
||||
}
|
||||
|
||||
unsigned char* output_data = (unsigned char*)malloc(new_w * new_h * channels * sizeof(unsigned char));
|
||||
|
||||
stbir_resize_uint8_srgb(channels_data, w, h, 0, output_data, new_w, new_h, 0, channels, STBIR_ALPHA_CHANNEL_NONE, 0);
|
||||
|
||||
free(channels_data);
|
||||
stbi_image_free(input_data);
|
||||
|
||||
char output[200];
|
||||
sprintf(output, "test-output/channels-%d-%d-%d-%s", channels, new_w, new_h, file);
|
||||
stbi_write_png(output, new_w, new_h, channels, output_data, 0);
|
||||
|
||||
free(output_data);
|
||||
}
|
||||
|
||||
void test_subpixel(const char* file, float width_percent, float height_percent, float s1, float t1)
|
||||
{
|
||||
int w, h, n;
|
||||
unsigned char* input_data = stbi_load(file, &w, &h, &n, 0);
|
||||
|
||||
if (input_data == NULL)
|
||||
return;
|
||||
|
||||
s1 = ((float)w - 1 + s1)/w;
|
||||
t1 = ((float)h - 1 + t1)/h;
|
||||
|
||||
int new_w = (int)(w * width_percent);
|
||||
int new_h = (int)(h * height_percent);
|
||||
|
||||
unsigned char* output_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(unsigned char));
|
||||
|
||||
stbir_resize_region(input_data, w, h, 0, output_data, new_w, new_h, 0, STBIR_TYPE_UINT8, n, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0, 0, s1, t1);
|
||||
|
||||
stbi_image_free(input_data);
|
||||
|
||||
char output[200];
|
||||
sprintf(output, "test-output/subpixel-%d-%d-%f-%f-%s", new_w, new_h, s1, t1, file);
|
||||
stbi_write_png(output, new_w, new_h, n, output_data, 0);
|
||||
|
||||
free(output_data);
|
||||
}
|
||||
|
||||
unsigned int* pixel(unsigned int* buffer, int x, int y, int c, int w, int n)
|
||||
{
|
||||
return &buffer[y*w*n + x*n + c];
|
||||
}
|
||||
|
||||
void test_premul()
|
||||
{
|
||||
unsigned int input[2 * 2 * 4];
|
||||
unsigned int output[1 * 1 * 4];
|
||||
unsigned int output2[2 * 2 * 4];
|
||||
|
||||
memset(input, 0, sizeof(input));
|
||||
|
||||
// First a test to make sure premul is working properly.
|
||||
|
||||
// Top left - solid red
|
||||
*pixel(input, 0, 0, 0, 2, 4) = 255;
|
||||
*pixel(input, 0, 0, 3, 2, 4) = 255;
|
||||
|
||||
// Bottom left - solid red
|
||||
*pixel(input, 0, 1, 0, 2, 4) = 255;
|
||||
*pixel(input, 0, 1, 3, 2, 4) = 255;
|
||||
|
||||
// Top right - transparent green
|
||||
*pixel(input, 1, 0, 1, 2, 4) = 255;
|
||||
*pixel(input, 1, 0, 3, 2, 4) = 25;
|
||||
|
||||
// Bottom right - transparent green
|
||||
*pixel(input, 1, 1, 1, 2, 4) = 255;
|
||||
*pixel(input, 1, 1, 3, 2, 4) = 25;
|
||||
|
||||
stbir_resize(input, 2, 2, 0, output, 1, 1, 0, STBIR_TYPE_UINT32, 4, 3, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, &g_context);
|
||||
|
||||
float r = (float)255 / 4294967296;
|
||||
float g = (float)255 / 4294967296;
|
||||
float ra = (float)255 / 4294967296;
|
||||
float ga = (float)25 / 4294967296;
|
||||
float a = (ra + ga) / 2;
|
||||
|
||||
STBIR_ASSERT(output[0] == (unsigned int)(r * ra / 2 / a * 4294967296 + 0.5f)); // 232
|
||||
STBIR_ASSERT(output[1] == (unsigned int)(g * ga / 2 / a * 4294967296 + 0.5f)); // 23
|
||||
STBIR_ASSERT(output[2] == 0);
|
||||
STBIR_ASSERT(output[3] == (unsigned int)(a * 4294967296 + 0.5f)); // 140
|
||||
|
||||
// Now a test to make sure it doesn't clobber existing values.
|
||||
|
||||
// Top right - completely transparent green
|
||||
*pixel(input, 1, 0, 1, 2, 4) = 255;
|
||||
*pixel(input, 1, 0, 3, 2, 4) = 0;
|
||||
|
||||
// Bottom right - completely transparent green
|
||||
*pixel(input, 1, 1, 1, 2, 4) = 255;
|
||||
*pixel(input, 1, 1, 3, 2, 4) = 0;
|
||||
|
||||
stbir_resize(input, 2, 2, 0, output2, 2, 2, 0, STBIR_TYPE_UINT32, 4, 3, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, &g_context);
|
||||
|
||||
STBIR_ASSERT(*pixel(output2, 0, 0, 0, 2, 4) == 255);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 0, 1, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 0, 2, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 0, 3, 2, 4) == 255);
|
||||
|
||||
STBIR_ASSERT(*pixel(output2, 0, 1, 0, 2, 4) == 255);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 1, 1, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 1, 2, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 0, 1, 3, 2, 4) == 255);
|
||||
|
||||
STBIR_ASSERT(*pixel(output2, 1, 0, 0, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 0, 1, 2, 4) == 255);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 0, 2, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 0, 3, 2, 4) == 0);
|
||||
|
||||
STBIR_ASSERT(*pixel(output2, 1, 1, 0, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 1, 1, 2, 4) == 255);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 1, 2, 2, 4) == 0);
|
||||
STBIR_ASSERT(*pixel(output2, 1, 1, 3, 2, 4) == 0);
|
||||
}
|
||||
|
||||
// test that splitting a pow-2 image into tiles produces identical results
|
||||
void test_subpixel_1()
|
||||
{
|
||||
unsigned char image[8 * 8];
|
||||
|
||||
mtsrand(0);
|
||||
|
||||
for (int i = 0; i < sizeof(image); i++)
|
||||
image[i] = mtrand() & 255;
|
||||
|
||||
unsigned char output_data[16 * 16];
|
||||
|
||||
stbir_resize_region(image, 8, 8, 0, output_data, 16, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0, 0, 1, 1);
|
||||
|
||||
unsigned char output_left[8 * 16];
|
||||
unsigned char output_right[8 * 16];
|
||||
|
||||
stbir_resize_region(image, 8, 8, 0, output_left, 8, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0, 0, 0.5f, 1);
|
||||
stbir_resize_region(image, 8, 8, 0, output_right, 8, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0.5f, 0, 1, 1);
|
||||
|
||||
for (int x = 0; x < 8; x++)
|
||||
{
|
||||
for (int y = 0; y < 16; y++)
|
||||
{
|
||||
STBIR_ASSERT(output_data[y * 16 + x] == output_left[y * 8 + x]);
|
||||
STBIR_ASSERT(output_data[y * 16 + x + 8] == output_right[y * 8 + x]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// test that replicating an image and using a subtile of it produces same results as wraparound
|
||||
void test_subpixel_2()
|
||||
{
|
||||
unsigned char image[8 * 8];
|
||||
|
||||
mtsrand(0);
|
||||
|
||||
for (int i = 0; i < sizeof(image); i++)
|
||||
image[i] = mtrand() & 255;
|
||||
|
||||
unsigned char large_image[32 * 32];
|
||||
|
||||
for (int x = 0; x < 8; x++)
|
||||
{
|
||||
for (int y = 0; y < 8; y++)
|
||||
{
|
||||
for (int i = 0; i < 4; i++)
|
||||
{
|
||||
for (int j = 0; j < 4; j++)
|
||||
large_image[j*4*8*8 + i*8 + y*4*8 + x] = image[y*8 + x];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
unsigned char output_data_1[16 * 16];
|
||||
unsigned char output_data_2[16 * 16];
|
||||
|
||||
stbir_resize(image, 8, 8, 0, output_data_1, 16, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_WRAP, STBIR_EDGE_WRAP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
|
||||
stbir_resize_region(large_image, 32, 32, 0, output_data_2, 16, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_WRAP, STBIR_EDGE_WRAP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0.25f, 0.25f, 0.5f, 0.5f);
|
||||
|
||||
{for (int x = 0; x < 16; x++)
|
||||
{
|
||||
for (int y = 0; y < 16; y++)
|
||||
STBIR_ASSERT(output_data_1[y * 16 + x] == output_data_2[y * 16 + x]);
|
||||
}}
|
||||
}
|
||||
|
||||
// test that 0,0,1,1 subpixel produces same result as no-rect
|
||||
void test_subpixel_3()
|
||||
{
|
||||
unsigned char image[8 * 8];
|
||||
|
||||
mtsrand(0);
|
||||
|
||||
for (int i = 0; i < sizeof(image); i++)
|
||||
image[i] = mtrand() & 255;
|
||||
|
||||
unsigned char output_data_1[32 * 32];
|
||||
unsigned char output_data_2[32 * 32];
|
||||
|
||||
stbir_resize_region(image, 8, 8, 0, output_data_1, 32, 32, 0, STBIR_TYPE_UINT8, 1, 0, STBIR_ALPHA_CHANNEL_NONE, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_LINEAR, NULL, 0, 0, 1, 1);
|
||||
stbir_resize_uint8(image, 8, 8, 0, output_data_2, 32, 32, 0, 1);
|
||||
|
||||
for (int x = 0; x < 32; x++)
|
||||
{
|
||||
for (int y = 0; y < 32; y++)
|
||||
STBIR_ASSERT(output_data_1[y * 32 + x] == output_data_2[y * 32 + x]);
|
||||
}
|
||||
}
|
||||
|
||||
// test that 1:1 resample using s,t=0,0,1,1 with bilinear produces original image
|
||||
void test_subpixel_4()
|
||||
{
|
||||
unsigned char image[8 * 8];
|
||||
|
||||
mtsrand(0);
|
||||
|
||||
for (int i = 0; i < sizeof(image); i++)
|
||||
image[i] = mtrand() & 255;
|
||||
|
||||
unsigned char output[8 * 8];
|
||||
|
||||
stbir_resize_region(image, 8, 8, 0, output, 8, 8, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_TRIANGLE, STBIR_FILTER_TRIANGLE, STBIR_COLORSPACE_LINEAR, &g_context, 0, 0, 1, 1);
|
||||
STBIR_ASSERT(memcmp(image, output, 8 * 8) == 0);
|
||||
}
|
||||
|
||||
static unsigned int image88_int[8][8];
|
||||
static unsigned char image88 [8][8];
|
||||
static unsigned char output88[8][8];
|
||||
static unsigned char output44[4][4];
|
||||
static unsigned char output22[2][2];
|
||||
static unsigned char output11[1][1];
|
||||
|
||||
void resample_88(stbir_filter filter)
|
||||
{
|
||||
stbir_resize_uint8_generic(image88[0],8,8,0, output88[0],8,8,0, 1,-1,0, STBIR_EDGE_CLAMP, filter, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
stbir_resize_uint8_generic(image88[0],8,8,0, output44[0],4,4,0, 1,-1,0, STBIR_EDGE_CLAMP, filter, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
stbir_resize_uint8_generic(image88[0],8,8,0, output22[0],2,2,0, 1,-1,0, STBIR_EDGE_CLAMP, filter, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
stbir_resize_uint8_generic(image88[0],8,8,0, output11[0],1,1,0, 1,-1,0, STBIR_EDGE_CLAMP, filter, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
}
|
||||
|
||||
void verify_box(void)
|
||||
{
|
||||
int i,j,t;
|
||||
|
||||
resample_88(STBIR_FILTER_BOX);
|
||||
|
||||
for (i=0; i < sizeof(image88); ++i)
|
||||
STBIR_ASSERT(image88[0][i] == output88[0][i]);
|
||||
|
||||
t = 0;
|
||||
for (j=0; j < 4; ++j)
|
||||
for (i=0; i < 4; ++i) {
|
||||
int n = image88[j*2+0][i*2+0]
|
||||
+ image88[j*2+0][i*2+1]
|
||||
+ image88[j*2+1][i*2+0]
|
||||
+ image88[j*2+1][i*2+1];
|
||||
STBIR_ASSERT(output44[j][i] == ((n+2)>>2) || output44[j][i] == ((n+1)>>2)); // can't guarantee exact rounding due to numerical precision
|
||||
t += n;
|
||||
}
|
||||
STBIR_ASSERT(output11[0][0] == ((t+32)>>6) || output11[0][0] == ((t+31)>>6)); // can't guarantee exact rounding due to numerical precision
|
||||
}
|
||||
|
||||
void verify_filter_normalized(stbir_filter filter, int output_size, unsigned int value)
|
||||
{
|
||||
int i, j;
|
||||
unsigned int output[64];
|
||||
|
||||
stbir_resize(image88_int[0], 8, 8, 0, output, output_size, output_size, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, filter, filter, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
for (j = 0; j < output_size; ++j)
|
||||
for (i = 0; i < output_size; ++i)
|
||||
STBIR_ASSERT(value == output[j*output_size + i]);
|
||||
}
|
||||
|
||||
float round2(float f)
|
||||
{
|
||||
return (float) floor(f+0.5f); // round() isn't C standard pre-C99
|
||||
}
|
||||
|
||||
void test_filters(void)
|
||||
{
|
||||
int i,j;
|
||||
|
||||
mtsrand(0);
|
||||
|
||||
for (i=0; i < sizeof(image88); ++i)
|
||||
image88[0][i] = mtrand() & 255;
|
||||
verify_box();
|
||||
|
||||
for (i=0; i < sizeof(image88); ++i)
|
||||
image88[0][i] = 0;
|
||||
image88[4][4] = 255;
|
||||
verify_box();
|
||||
|
||||
for (j=0; j < 8; ++j)
|
||||
for (i=0; i < 8; ++i)
|
||||
image88[j][i] = (j^i)&1 ? 255 : 0;
|
||||
verify_box();
|
||||
|
||||
for (j=0; j < 8; ++j)
|
||||
for (i=0; i < 8; ++i)
|
||||
image88[j][i] = i&2 ? 255 : 0;
|
||||
verify_box();
|
||||
|
||||
int value = 64;
|
||||
|
||||
for (j = 0; j < 8; ++j)
|
||||
for (i = 0; i < 8; ++i)
|
||||
image88_int[j][i] = value;
|
||||
|
||||
verify_filter_normalized(STBIR_FILTER_BOX, 8, value);
|
||||
verify_filter_normalized(STBIR_FILTER_TRIANGLE, 8, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CUBICBSPLINE, 8, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CATMULLROM, 8, value);
|
||||
verify_filter_normalized(STBIR_FILTER_MITCHELL, 8, value);
|
||||
|
||||
verify_filter_normalized(STBIR_FILTER_BOX, 4, value);
|
||||
verify_filter_normalized(STBIR_FILTER_TRIANGLE, 4, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CUBICBSPLINE, 4, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CATMULLROM, 4, value);
|
||||
verify_filter_normalized(STBIR_FILTER_MITCHELL, 4, value);
|
||||
|
||||
verify_filter_normalized(STBIR_FILTER_BOX, 2, value);
|
||||
verify_filter_normalized(STBIR_FILTER_TRIANGLE, 2, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CUBICBSPLINE, 2, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CATMULLROM, 2, value);
|
||||
verify_filter_normalized(STBIR_FILTER_MITCHELL, 2, value);
|
||||
|
||||
verify_filter_normalized(STBIR_FILTER_BOX, 1, value);
|
||||
verify_filter_normalized(STBIR_FILTER_TRIANGLE, 1, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CUBICBSPLINE, 1, value);
|
||||
verify_filter_normalized(STBIR_FILTER_CATMULLROM, 1, value);
|
||||
verify_filter_normalized(STBIR_FILTER_MITCHELL, 1, value);
|
||||
|
||||
{
|
||||
// This test is designed to produce coefficients that are very badly denormalized.
|
||||
unsigned int v = 556;
|
||||
|
||||
unsigned int input[100 * 100];
|
||||
unsigned int output[11 * 11];
|
||||
|
||||
for (j = 0; j < 100 * 100; ++j)
|
||||
input[j] = v;
|
||||
|
||||
stbir_resize(input, 100, 100, 0, output, 11, 11, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_TRIANGLE, STBIR_FILTER_TRIANGLE, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
for (j = 0; j < 11 * 11; ++j)
|
||||
STBIR_ASSERT(v == output[j]);
|
||||
}
|
||||
|
||||
{
|
||||
// Now test the trapezoid filter for downsampling.
|
||||
unsigned int input[3 * 1];
|
||||
unsigned int output[2 * 1];
|
||||
|
||||
input[0] = 0;
|
||||
input[1] = 255;
|
||||
input[2] = 127;
|
||||
|
||||
stbir_resize(input, 3, 1, 0, output, 2, 1, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
STBIR_ASSERT(output[0] == (unsigned int)round2((float)(input[0] * 2 + input[1]) / 3));
|
||||
STBIR_ASSERT(output[1] == (unsigned int)round2((float)(input[2] * 2 + input[1]) / 3));
|
||||
|
||||
stbir_resize(input, 1, 3, 0, output, 1, 2, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
STBIR_ASSERT(output[0] == (unsigned int)round2((float)(input[0] * 2 + input[1]) / 3));
|
||||
STBIR_ASSERT(output[1] == (unsigned int)round2((float)(input[2] * 2 + input[1]) / 3));
|
||||
}
|
||||
|
||||
{
|
||||
// Now test the trapezoid filter for upsampling.
|
||||
unsigned int input[2 * 1];
|
||||
unsigned int output[3 * 1];
|
||||
|
||||
input[0] = 0;
|
||||
input[1] = 255;
|
||||
|
||||
stbir_resize(input, 2, 1, 0, output, 3, 1, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
STBIR_ASSERT(output[0] == input[0]);
|
||||
STBIR_ASSERT(output[1] == (input[0] + input[1]) / 2);
|
||||
STBIR_ASSERT(output[2] == input[1]);
|
||||
|
||||
stbir_resize(input, 1, 2, 0, output, 1, 3, 0, STBIR_TYPE_UINT32, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
|
||||
STBIR_ASSERT(output[0] == input[0]);
|
||||
STBIR_ASSERT(output[1] == (input[0] + input[1]) / 2);
|
||||
STBIR_ASSERT(output[2] == input[1]);
|
||||
}
|
||||
|
||||
// checkerboard
|
||||
{
|
||||
unsigned char input[64][64];
|
||||
unsigned char output[16][16];
|
||||
int i,j;
|
||||
for (j=0; j < 64; ++j)
|
||||
for (i=0; i < 64; ++i)
|
||||
input[j][i] = (i^j)&1 ? 255 : 0;
|
||||
stbir_resize_uint8_generic(input[0], 64, 64, 0, output[0],16,16,0, 1,-1,0,STBIR_EDGE_WRAP,STBIR_FILTER_DEFAULT,STBIR_COLORSPACE_LINEAR,0);
|
||||
for (j=0; j < 16; ++j)
|
||||
for (i=0; i < 16; ++i)
|
||||
STBIR_ASSERT(output[j][i] == 128);
|
||||
stbir_resize_uint8_srgb_edgemode(input[0], 64, 64, 0, output[0],16,16,0, 1,-1,0,STBIR_EDGE_WRAP);
|
||||
for (j=0; j < 16; ++j)
|
||||
for (i=0; i < 16; ++i)
|
||||
STBIR_ASSERT(output[j][i] == 188);
|
||||
|
||||
|
||||
}
|
||||
|
||||
{
|
||||
// Test trapezoid box filter
|
||||
unsigned char input[2 * 1];
|
||||
unsigned char output[127 * 1];
|
||||
|
||||
input[0] = 0;
|
||||
input[1] = 255;
|
||||
|
||||
stbir_resize(input, 2, 1, 0, output, 127, 1, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
STBIR_ASSERT(output[0] == 0);
|
||||
STBIR_ASSERT(output[127 / 2 - 1] == 0);
|
||||
STBIR_ASSERT(output[127 / 2] == 128);
|
||||
STBIR_ASSERT(output[127 / 2 + 1] == 255);
|
||||
STBIR_ASSERT(output[126] == 255);
|
||||
stbi_write_png("test-output/trapezoid-upsample-horizontal.png", 127, 1, 1, output, 0);
|
||||
|
||||
stbir_resize(input, 1, 2, 0, output, 1, 127, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_BOX, STBIR_COLORSPACE_LINEAR, NULL);
|
||||
STBIR_ASSERT(output[0] == 0);
|
||||
STBIR_ASSERT(output[127 / 2 - 1] == 0);
|
||||
STBIR_ASSERT(output[127 / 2] == 128);
|
||||
STBIR_ASSERT(output[127 / 2 + 1] == 255);
|
||||
STBIR_ASSERT(output[126] == 255);
|
||||
stbi_write_png("test-output/trapezoid-upsample-vertical.png", 1, 127, 1, output, 0);
|
||||
}
|
||||
}
|
||||
|
||||
#define UMAX32 4294967295U
|
||||
|
||||
static void write32(char *filename, stbir_uint32 *output, int w, int h)
|
||||
{
|
||||
stbir_uint8 *data = (stbir_uint8*) malloc(w*h*3);
|
||||
for (int i=0; i < w*h*3; ++i)
|
||||
data[i] = output[i]>>24;
|
||||
stbi_write_png(filename, w, h, 3, data, 0);
|
||||
free(data);
|
||||
}
|
||||
|
||||
static void test_32(void)
|
||||
{
|
||||
int w=100,h=120,x,y, out_w,out_h;
|
||||
stbir_uint32 *input = (stbir_uint32*) malloc(4 * 3 * w * h);
|
||||
stbir_uint32 *output = (stbir_uint32*) malloc(4 * 3 * 3*w * 3*h);
|
||||
for (y=0; y < h; ++y) {
|
||||
for (x=0; x < w; ++x) {
|
||||
input[y*3*w + x*3 + 0] = x * ( UMAX32/w );
|
||||
input[y*3*w + x*3 + 1] = y * ( UMAX32/h );
|
||||
input[y*3*w + x*3 + 2] = UMAX32/2;
|
||||
}
|
||||
}
|
||||
out_w = w*33/16;
|
||||
out_h = h*33/16;
|
||||
stbir_resize(input,w,h,0,output,out_w,out_h,0,STBIR_TYPE_UINT32,3,-1,0,STBIR_EDGE_CLAMP,STBIR_EDGE_CLAMP,STBIR_FILTER_DEFAULT,STBIR_FILTER_DEFAULT,STBIR_COLORSPACE_LINEAR,NULL);
|
||||
write32("test-output/seantest_1.png", output,out_w,out_h);
|
||||
|
||||
out_w = w*16/33;
|
||||
out_h = h*16/33;
|
||||
stbir_resize(input,w,h,0,output,out_w,out_h,0,STBIR_TYPE_UINT32,3,-1,0,STBIR_EDGE_CLAMP,STBIR_EDGE_CLAMP,STBIR_FILTER_DEFAULT,STBIR_FILTER_DEFAULT,STBIR_COLORSPACE_LINEAR,NULL);
|
||||
write32("test-output/seantest_2.png", output,out_w,out_h);
|
||||
}
|
||||
|
||||
|
||||
void test_suite(int argc, char **argv)
|
||||
{
|
||||
int i;
|
||||
char *barbara;
|
||||
|
||||
_mkdir("test-output");
|
||||
|
||||
if (argc > 1)
|
||||
barbara = argv[1];
|
||||
else
|
||||
barbara = "barbara.png";
|
||||
|
||||
// check what cases we need normalization for
|
||||
#if 1
|
||||
{
|
||||
float x, y;
|
||||
for (x = -1; x < 1; x += 0.05f) {
|
||||
float sums[5] = { 0 };
|
||||
float o;
|
||||
for (o = -5; o <= 5; ++o) {
|
||||
sums[0] += stbir__filter_mitchell(x + o, 1);
|
||||
sums[1] += stbir__filter_catmullrom(x + o, 1);
|
||||
sums[2] += stbir__filter_cubic(x + o, 1);
|
||||
sums[3] += stbir__filter_triangle(x + o, 1);
|
||||
sums[4] += stbir__filter_trapezoid(x + o, 0.5f);
|
||||
}
|
||||
for (i = 0; i < 5; ++i)
|
||||
STBIR_ASSERT(sums[i] >= 1.0 - 0.001 && sums[i] <= 1.0 + 0.001);
|
||||
}
|
||||
|
||||
#if 1
|
||||
for (y = 0.11f; y < 1; y += 0.01f) { // Step
|
||||
for (x = -1; x < 1; x += 0.05f) { // Phase
|
||||
float sums[5] = { 0 };
|
||||
float o;
|
||||
for (o = -5; o <= 5; o += y) {
|
||||
sums[0] += y * stbir__filter_mitchell(x + o, 1);
|
||||
sums[1] += y * stbir__filter_catmullrom(x + o, 1);
|
||||
sums[2] += y * stbir__filter_cubic(x + o, 1);
|
||||
sums[4] += y * stbir__filter_trapezoid(x + o, 0.5f);
|
||||
sums[3] += y * stbir__filter_triangle(x + o, 1);
|
||||
}
|
||||
for (i = 0; i < 3; ++i)
|
||||
STBIR_ASSERT(sums[i] >= 1.0 - 0.0170 && sums[i] <= 1.0 + 0.0170);
|
||||
}
|
||||
}
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
|
||||
#if 0 // linear_to_srgb_uchar table
|
||||
for (i=0; i < 256; ++i) {
|
||||
float f = stbir__srgb_to_linear((i-0.5f)/255.0f);
|
||||
printf("%9d, ", (int) ((f) * (1<<28)));
|
||||
if ((i & 7) == 7)
|
||||
printf("\n");
|
||||
}
|
||||
#endif
|
||||
|
||||
// old tests that hacky fix worked on - test that
|
||||
// every uint8 maps to itself
|
||||
for (i = 0; i < 256; i++) {
|
||||
float f = stbir__srgb_to_linear(float(i) / 255);
|
||||
int n = stbir__linear_to_srgb_uchar(f);
|
||||
STBIR_ASSERT(n == i);
|
||||
}
|
||||
|
||||
// new tests that hacky fix failed for - test that
|
||||
// values adjacent to uint8 round to nearest uint8
|
||||
for (i = 0; i < 256; i++) {
|
||||
for (float y = -0.42f; y <= 0.42f; y += 0.01f) {
|
||||
float f = stbir__srgb_to_linear((i+y) / 255.0f);
|
||||
int n = stbir__linear_to_srgb_uchar(f);
|
||||
STBIR_ASSERT(n == i);
|
||||
}
|
||||
}
|
||||
|
||||
test_filters();
|
||||
|
||||
test_subpixel_1();
|
||||
test_subpixel_2();
|
||||
test_subpixel_3();
|
||||
test_subpixel_4();
|
||||
|
||||
test_premul();
|
||||
|
||||
test_32();
|
||||
|
||||
// Some tests to make sure errors don't pop up with strange filter/dimension combinations.
|
||||
stbir_resize(image88, 8, 8, 0, output88, 4, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
|
||||
stbir_resize(image88, 8, 8, 0, output88, 4, 16, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_BOX, STBIR_COLORSPACE_SRGB, &g_context);
|
||||
stbir_resize(image88, 8, 8, 0, output88, 16, 4, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_BOX, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
|
||||
stbir_resize(image88, 8, 8, 0, output88, 16, 4, 0, STBIR_TYPE_UINT8, 1, STBIR_ALPHA_CHANNEL_NONE, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_BOX, STBIR_COLORSPACE_SRGB, &g_context);
|
||||
|
||||
for (i = 0; i < 10; i++)
|
||||
test_subpixel(barbara, 0.5f, 0.5f, (float)i / 10, 1);
|
||||
|
||||
for (i = 0; i < 10; i++)
|
||||
test_subpixel(barbara, 0.5f, 0.5f, 1, (float)i / 10);
|
||||
|
||||
for (i = 0; i < 10; i++)
|
||||
test_subpixel(barbara, 2, 2, (float)i / 10, 1);
|
||||
|
||||
for (i = 0; i < 10; i++)
|
||||
test_subpixel(barbara, 2, 2, 1, (float)i / 10);
|
||||
|
||||
// Channels test
|
||||
test_channels(barbara, 0.5f, 0.5f, 1);
|
||||
test_channels(barbara, 0.5f, 0.5f, 2);
|
||||
test_channels(barbara, 0.5f, 0.5f, 3);
|
||||
test_channels(barbara, 0.5f, 0.5f, 4);
|
||||
|
||||
test_channels(barbara, 2, 2, 1);
|
||||
test_channels(barbara, 2, 2, 2);
|
||||
test_channels(barbara, 2, 2, 3);
|
||||
test_channels(barbara, 2, 2, 4);
|
||||
|
||||
// filter tests
|
||||
resize_image(barbara, 2, 2, STBIR_FILTER_BOX , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-upsample-nearest.png");
|
||||
resize_image(barbara, 2, 2, STBIR_FILTER_TRIANGLE , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-upsample-bilinear.png");
|
||||
resize_image(barbara, 2, 2, STBIR_FILTER_CUBICBSPLINE, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-upsample-bicubic.png");
|
||||
resize_image(barbara, 2, 2, STBIR_FILTER_CATMULLROM , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-upsample-catmullrom.png");
|
||||
resize_image(barbara, 2, 2, STBIR_FILTER_MITCHELL , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-upsample-mitchell.png");
|
||||
|
||||
resize_image(barbara, 0.5f, 0.5f, STBIR_FILTER_BOX , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-downsample-nearest.png");
|
||||
resize_image(barbara, 0.5f, 0.5f, STBIR_FILTER_TRIANGLE , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-downsample-bilinear.png");
|
||||
resize_image(barbara, 0.5f, 0.5f, STBIR_FILTER_CUBICBSPLINE, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-downsample-bicubic.png");
|
||||
resize_image(barbara, 0.5f, 0.5f, STBIR_FILTER_CATMULLROM , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-downsample-catmullrom.png");
|
||||
resize_image(barbara, 0.5f, 0.5f, STBIR_FILTER_MITCHELL , STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, "test-output/barbara-downsample-mitchell.png");
|
||||
|
||||
for (i = 10; i < 100; i++)
|
||||
{
|
||||
char outname[200];
|
||||
sprintf(outname, "test-output/barbara-width-%d.jpg", i);
|
||||
resize_image(barbara, (float)i / 100, 1, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, outname);
|
||||
}
|
||||
|
||||
for (i = 110; i < 500; i += 10)
|
||||
{
|
||||
char outname[200];
|
||||
sprintf(outname, "test-output/barbara-width-%d.jpg", i);
|
||||
resize_image(barbara, (float)i / 100, 1, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, outname);
|
||||
}
|
||||
|
||||
for (i = 10; i < 100; i++)
|
||||
{
|
||||
char outname[200];
|
||||
sprintf(outname, "test-output/barbara-height-%d.jpg", i);
|
||||
resize_image(barbara, 1, (float)i / 100, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, outname);
|
||||
}
|
||||
|
||||
for (i = 110; i < 500; i += 10)
|
||||
{
|
||||
char outname[200];
|
||||
sprintf(outname, "test-output/barbara-height-%d.jpg", i);
|
||||
resize_image(barbara, 1, (float)i / 100, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, outname);
|
||||
}
|
||||
|
||||
for (i = 50; i < 200; i += 10)
|
||||
{
|
||||
char outname[200];
|
||||
sprintf(outname, "test-output/barbara-width-height-%d.jpg", i);
|
||||
resize_image(barbara, 100 / (float)i, (float)i / 100, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB, outname);
|
||||
}
|
||||
|
||||
test_format<unsigned short>(barbara, 0.5, 2.0, STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB);
|
||||
test_format<unsigned short>(barbara, 0.5, 2.0, STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR);
|
||||
test_format<unsigned short>(barbara, 2.0, 0.5, STBIR_TYPE_UINT16, STBIR_COLORSPACE_SRGB);
|
||||
test_format<unsigned short>(barbara, 2.0, 0.5, STBIR_TYPE_UINT16, STBIR_COLORSPACE_LINEAR);
|
||||
|
||||
test_format<unsigned int>(barbara, 0.5, 2.0, STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB);
|
||||
test_format<unsigned int>(barbara, 0.5, 2.0, STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR);
|
||||
test_format<unsigned int>(barbara, 2.0, 0.5, STBIR_TYPE_UINT32, STBIR_COLORSPACE_SRGB);
|
||||
test_format<unsigned int>(barbara, 2.0, 0.5, STBIR_TYPE_UINT32, STBIR_COLORSPACE_LINEAR);
|
||||
|
||||
test_float(barbara, 0.5, 2.0, STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB);
|
||||
test_float(barbara, 0.5, 2.0, STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR);
|
||||
test_float(barbara, 2.0, 0.5, STBIR_TYPE_FLOAT, STBIR_COLORSPACE_SRGB);
|
||||
test_float(barbara, 2.0, 0.5, STBIR_TYPE_FLOAT, STBIR_COLORSPACE_LINEAR);
|
||||
|
||||
// Edge behavior tests
|
||||
resize_image("hgradient.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR, "test-output/hgradient-clamp.png");
|
||||
resize_image("hgradient.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_WRAP, STBIR_COLORSPACE_LINEAR, "test-output/hgradient-wrap.png");
|
||||
|
||||
resize_image("vgradient.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR, "test-output/vgradient-clamp.png");
|
||||
resize_image("vgradient.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_WRAP, STBIR_COLORSPACE_LINEAR, "test-output/vgradient-wrap.png");
|
||||
|
||||
resize_image("1px-border.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_LINEAR, "test-output/1px-border-reflect.png");
|
||||
resize_image("1px-border.png", 2, 2, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR, "test-output/1px-border-clamp.png");
|
||||
|
||||
// sRGB tests
|
||||
resize_image("gamma_colors.jpg", .5f, .5f, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_SRGB, "test-output/gamma_colors.jpg");
|
||||
resize_image("gamma_2.2.jpg", .5f, .5f, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_SRGB, "test-output/gamma_2.2.jpg");
|
||||
resize_image("gamma_dalai_lama_gray.jpg", .5f, .5f, STBIR_FILTER_CATMULLROM, STBIR_EDGE_REFLECT, STBIR_COLORSPACE_SRGB, "test-output/gamma_dalai_lama_gray.jpg");
|
||||
}
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
#define STB_IMAGE_RESIZE_IMPLEMENTATION
|
||||
#define STB_IMAGE_RESIZE_STATIC
|
||||
#include "stb_image_resize.h"
|
||||
|
||||
// Just to make sure it will build properly with a c compiler
|
||||
|
|
@ -0,0 +1,93 @@
|
|||
# Microsoft Developer Studio Project File - Name="resize" - Package Owner=<4>
|
||||
# Microsoft Developer Studio Generated Build File, Format Version 6.00
|
||||
# ** DO NOT EDIT **
|
||||
|
||||
# TARGTYPE "Win32 (x86) Console Application" 0x0103
|
||||
|
||||
CFG=resize - Win32 Debug
|
||||
!MESSAGE This is not a valid makefile. To build this project using NMAKE,
|
||||
!MESSAGE use the Export Makefile command and run
|
||||
!MESSAGE
|
||||
!MESSAGE NMAKE /f "resize.mak".
|
||||
!MESSAGE
|
||||
!MESSAGE You can specify a configuration when running NMAKE
|
||||
!MESSAGE by defining the macro CFG on the command line. For example:
|
||||
!MESSAGE
|
||||
!MESSAGE NMAKE /f "resize.mak" CFG="resize - Win32 Debug"
|
||||
!MESSAGE
|
||||
!MESSAGE Possible choices for configuration are:
|
||||
!MESSAGE
|
||||
!MESSAGE "resize - Win32 Release" (based on "Win32 (x86) Console Application")
|
||||
!MESSAGE "resize - Win32 Debug" (based on "Win32 (x86) Console Application")
|
||||
!MESSAGE
|
||||
|
||||
# Begin Project
|
||||
# PROP AllowPerConfigDependencies 0
|
||||
# PROP Scc_ProjName ""
|
||||
# PROP Scc_LocalPath ""
|
||||
CPP=cl.exe
|
||||
RSC=rc.exe
|
||||
|
||||
!IF "$(CFG)" == "resize - Win32 Release"
|
||||
|
||||
# PROP BASE Use_MFC 0
|
||||
# PROP BASE Use_Debug_Libraries 0
|
||||
# PROP BASE Output_Dir "Release"
|
||||
# PROP BASE Intermediate_Dir "Release"
|
||||
# PROP BASE Target_Dir ""
|
||||
# PROP Use_MFC 0
|
||||
# PROP Use_Debug_Libraries 0
|
||||
# PROP Output_Dir "Release"
|
||||
# PROP Intermediate_Dir "Release"
|
||||
# PROP Ignore_Export_Lib 0
|
||||
# PROP Target_Dir ""
|
||||
# ADD BASE CPP /nologo /W3 /GX /O2 /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
|
||||
# ADD CPP /nologo /G6 /W3 /GX /Z7 /O2 /I ".." /D "WIN32" /D "NDEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /c
|
||||
# ADD BASE RSC /l 0x409 /d "NDEBUG"
|
||||
# ADD RSC /l 0x409 /d "NDEBUG"
|
||||
BSC32=bscmake.exe
|
||||
# ADD BASE BSC32 /nologo
|
||||
# ADD BSC32 /nologo
|
||||
LINK32=link.exe
|
||||
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /machine:I386
|
||||
# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386
|
||||
|
||||
!ELSEIF "$(CFG)" == "resize - Win32 Debug"
|
||||
|
||||
# PROP BASE Use_MFC 0
|
||||
# PROP BASE Use_Debug_Libraries 1
|
||||
# PROP BASE Output_Dir "Debug"
|
||||
# PROP BASE Intermediate_Dir "Debug"
|
||||
# PROP BASE Target_Dir ""
|
||||
# PROP Use_MFC 0
|
||||
# PROP Use_Debug_Libraries 1
|
||||
# PROP Output_Dir "Debug"
|
||||
# PROP Intermediate_Dir "Debug"
|
||||
# PROP Target_Dir ""
|
||||
# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
|
||||
# ADD CPP /nologo /W3 /Gm /GX /ZI /Od /I ".." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
|
||||
# ADD BASE RSC /l 0x409 /d "_DEBUG"
|
||||
# ADD RSC /l 0x409 /d "_DEBUG"
|
||||
BSC32=bscmake.exe
|
||||
# ADD BASE BSC32 /nologo
|
||||
# ADD BSC32 /nologo
|
||||
LINK32=link.exe
|
||||
# ADD BASE LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
|
||||
# ADD LINK32 kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib kernel32.lib user32.lib gdi32.lib winspool.lib comdlg32.lib advapi32.lib shell32.lib ole32.lib oleaut32.lib uuid.lib odbc32.lib odbccp32.lib /nologo /subsystem:console /debug /machine:I386 /pdbtype:sept
|
||||
|
||||
!ENDIF
|
||||
|
||||
# Begin Target
|
||||
|
||||
# Name "resize - Win32 Release"
|
||||
# Name "resize - Win32 Debug"
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=.\resample_test.cpp
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\stb_image_resize.h
|
||||
# End Source File
|
||||
# End Target
|
||||
# End Project
|
||||
|
|
@ -66,7 +66,7 @@ LINK32=link.exe
|
|||
# PROP Ignore_Export_Lib 0
|
||||
# PROP Target_Dir ""
|
||||
# ADD BASE CPP /nologo /W3 /Gm /GX /ZI /Od /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /YX /FD /GZ /c
|
||||
# ADD CPP /nologo /MTd /W3 /GX /Zd /Od /I ".." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "MAIN_TEST" /FR /FD /GZ /c
|
||||
# ADD CPP /nologo /MTd /W3 /GX /Zi /Od /I ".." /D "WIN32" /D "_DEBUG" /D "_CONSOLE" /D "_MBCS" /D "TT_TEST" /FR /FD /GZ /c
|
||||
# SUBTRACT CPP /YX
|
||||
# ADD BASE RSC /l 0x409 /d "_DEBUG"
|
||||
# ADD RSC /l 0x409 /d "_DEBUG"
|
||||
|
|
@ -106,10 +106,18 @@ SOURCE=..\stb_dxt.h
|
|||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\stb_herringbone_wang_tile.h
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\stb_image.h
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\stb_image_resize.h
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=..\stb_image_write.h
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
|
|
|||
|
|
@ -63,6 +63,18 @@ Package=<4>
|
|||
|
||||
###############################################################################
|
||||
|
||||
Project: "resize"=.\resize\resize.dsp - Package Owner=<4>
|
||||
|
||||
Package=<5>
|
||||
{{{
|
||||
}}}
|
||||
|
||||
Package=<4>
|
||||
{{{
|
||||
}}}
|
||||
|
||||
###############################################################################
|
||||
|
||||
Project: "stb"=.\stb.dsp - Package Owner=<4>
|
||||
|
||||
Package=<5>
|
||||
|
|
|
|||
|
|
@ -5,6 +5,7 @@
|
|||
#define STB_DIVIDE_IMPLEMENTATION
|
||||
#define STB_IMAGE_IMPLEMENTATION
|
||||
#define STB_HERRINGBONE_WANG_TILE_IMEPLEMENTATIOn
|
||||
#define STB_IMAGE_RESIZE_IMPLEMENTATION
|
||||
|
||||
#include "stb_herringbone_wang_tile.h"
|
||||
#include "stb_image.h"
|
||||
|
|
@ -13,3 +14,10 @@
|
|||
#include "stb_dxt.h"
|
||||
#include "stb_c_lexer.h"
|
||||
#include "stb_divide.h"
|
||||
#include "stb_image_resize.h"
|
||||
|
||||
|
||||
#define STBTE_DRAW_RECT(x0,y0,x1,y1,color) 0
|
||||
#define STBTE_DRAW_TILE(x,y,id,highlight) 0
|
||||
#define STB_TILEMAP_EDITOR_IMPLEMENTATION
|
||||
#include "stb_tilemap_editor.h"
|
||||
|
|
|
|||
|
|
@ -15,3 +15,8 @@
|
|||
#include "stb_divide.h"
|
||||
#include "stb_image.h"
|
||||
#include "stb_herringbone_wang_tile.h"
|
||||
|
||||
#define STBTE_DRAW_RECT(x0,y0,x1,y1,color)
|
||||
#define STBTE_DRAW_TILE(x,y,id,highlight)
|
||||
#define STB_TILEMAP_EDITOR_IMPLEMENTATION
|
||||
#include "stb_tilemap_editor.h"
|
||||
|
|
|
|||
|
|
@ -4,14 +4,27 @@
|
|||
#include <stdio.h>
|
||||
|
||||
char ttf_buffer[1<<25];
|
||||
unsigned char output[512*100];
|
||||
|
||||
#ifdef TT_TEST
|
||||
|
||||
void debug(void)
|
||||
{
|
||||
stbtt_fontinfo font;
|
||||
fread(ttf_buffer, 1, 1<<25, fopen("c:/x/lm/LiberationMono-Regular.ttf", "rb"));
|
||||
stbtt_InitFont(&font, ttf_buffer, 0);
|
||||
|
||||
stbtt_MakeGlyphBitmap(&font, output, 6, 9, 512, 5.172414E-03f, 5.172414E-03f, 54);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
stbtt_fontinfo font;
|
||||
unsigned char *bitmap;
|
||||
int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 34807), s = (argc > 2 ? atoi(argv[2]) : 32);
|
||||
|
||||
debug();
|
||||
|
||||
fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/mingliu.ttc", "rb"));
|
||||
|
||||
stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));
|
||||
|
|
|
|||
|
|
@ -1,12 +1,14 @@
|
|||
stb_vorbis.c | audio | decode ogg vorbis files from file/memory to float/16-bit signed output
|
||||
stb_image.h | graphics | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
|
||||
stb_truetype.h | graphics | parse, decode, and rasterize characters from truetype fonts
|
||||
stb_image_write.h | graphics | image writing to disk: PNG, TGA, BMP
|
||||
stretchy_buffer.h | utility | typesafe dynamic array for C (i.e. approximation to vector<>), doesn't compile as C++
|
||||
stb_textedit.h | UI | guts of a text editor for games etc implementing them from scratch
|
||||
stb_dxt.h | 3D graphics | Fabian "ryg" Giesen's real-time DXT compressor
|
||||
stb_herringbone_wang_tile.h | games | herringbone Wang tile map generator
|
||||
stb_perlin.h | 3D graphics | revised Perlin noise (3D input, 1D output)
|
||||
stb_c_lexer.h | parsing | simplify writing parsers for C-like languages
|
||||
stb_divide.h | math | more useful 32-bit modulus e.g. "euclidean divide"
|
||||
stb.h | misc | helper functions for C, mostly redundant in C++; basically author's personal stuff
|
||||
stb_vorbis.c | audio | decode ogg vorbis files from file/memory to float/16-bit signed output
|
||||
stb_image.h | graphics | image loading/decoding from file/memory: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC
|
||||
stb_truetype.h | graphics | parse, decode, and rasterize characters from truetype fonts
|
||||
stb_image_write.h | graphics | image writing to disk: PNG, TGA, BMP
|
||||
stb_image_resize.h | graphics | resize images larger/smaller with good quality
|
||||
stretchy_buffer.h | utility | typesafe dynamic array for C (i.e. approximation to vector<>), doesn't compile as C++
|
||||
stb_textedit.h | UI | guts of a text editor for games etc implementing them from scratch
|
||||
stb_dxt.h | 3D graphics | Fabian "ryg" Giesen's real-time DXT compressor
|
||||
stb_perlin.h | 3D graphics | revised Perlin noise (3D input, 1D output)
|
||||
stb_tilemap_editor.h | games | embeddable tilemap editor
|
||||
stb_herringbone_wang_tile.h | games | herringbone Wang tile map generator
|
||||
stb_c_lexer.h | parsing | simplify writing parsers for C-like languages
|
||||
stb_divide.h | math | more useful 32-bit modulus e.g. "euclidean divide"
|
||||
stb.h | misc | helper functions for C, mostly redundant in C++; basically author's personal stuff
|
||||
|
|
|
|||
|
|
@ -84,5 +84,9 @@ LINK32=link.exe
|
|||
|
||||
SOURCE=.\make_readme.c
|
||||
# End Source File
|
||||
# Begin Source File
|
||||
|
||||
SOURCE=.\README.list
|
||||
# End Source File
|
||||
# End Target
|
||||
# End Project
|
||||
|
|
|
|||
Loading…
Reference in New Issue