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Merge branch 'resample2' into resample

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master
Sean Barrett ago%!(EXTRA string=11 years)
parent cd1fbacbb6 586e84087c
commit 08ca345839
2 changed files with 116 additions and 41 deletions
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  1. 68
      stb_image_resize.h
  2. 89
      tests/resample_test.cpp

68
stb_image_resize.h
Unescape View File

@ -96,8 +96,13 @@ STBIRDEF int stbir_resize_float( const float *input_pixels , int input_w , i
#define STBIR_ALPHA_CHANNEL_NONE -1
#define STBIR_FLAG_PREMULTIPLIED_ALPHA (1 << 0) // If this flag is not set, the specified alpha channel will be multiplied into all other channels before resampling, then divided back out after.
#define STBIR_FLAG_ALPHA_USES_COLORSPACE (1 << 1) // The specified alpha channel should be handled as gamma-corrected value even when doing sRGB operations.
// Set this flag if your texture has premultiplied alpha. Otherwise, stbir will
// use alpha-correct resampling by multiplying the the specified alpha channel
// into all other channels before resampling, then dividing back out after.
#define STBIR_FLAG_PREMULTIPLIED_ALPHA (1 << 0)
// The specified alpha channel should be handled as gamma-corrected value even
// when doing sRGB operations.
#define STBIR_FLAG_ALPHA_USES_COLORSPACE (1 << 1)
STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
@ -201,7 +206,7 @@ STBIRDEF int stbir_resize( const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context);
STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int input_h , int input_stride_in_bytes,
@ -209,7 +214,7 @@ STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context,
float x_scale, float y_scale,
float x_offset, float y_offset);
@ -219,12 +224,25 @@ STBIRDEF int stbir_resize_region( const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context,
float s0, float t0, float s1, float t1);
// (s0, t0) & (s1, t1) are the top-left and bottom right corner (uv addressing style: [0, 1]x[0, 1]) of a region of the input image to use.
// Define this if you want a progress report.
// Example:
// void my_progress_report(float progress)
// {
// printf("Progress: %f%%\n", progress*100);
// }
//
// #define STBIR_PROGRESS_REPORT my_progress_report
#ifndef STBIR_PROGRESS_REPORT
#define STBIR_PROGRESS_REPORT(float_0_to_1)
#endif
//
//
//// end header file /////////////////////////////////////////////////////
@ -1448,6 +1466,8 @@ static void stbir__buffer_loop_upsample(stbir__info* stbir_info)
// Now all buffers should be ready to write a row of vertical sampling.
stbir__resample_vertical_upsample(stbir_info, y, in_first_scanline, in_last_scanline, in_center_of_out);
STBIR_PROGRESS_REPORT((float)y / stbir_info->output_h);
}
}
@ -1530,6 +1550,8 @@ static void stbir__buffer_loop_downsample(stbir__info* stbir_info)
// Now the horizontal buffer is ready to write to all ring buffer rows.
stbir__resample_vertical_downsample(stbir_info, y, out_first_scanline, out_last_scanline, out_center_of_in);
STBIR_PROGRESS_REPORT((float)(y + stbir__get_filter_pixel_margin_vertical(stbir_info)) / (max_y + stbir__get_filter_pixel_margin_vertical(stbir_info)));
}
stbir__empty_ring_buffer(stbir_info, stbir_info->output_h);
@ -1650,7 +1672,7 @@ static int stbir__resize_allocated(stbir__info *info,
return 0;
if (alpha_channel < 0)
flags = STBIR_FLAG_ALPHA_USES_COLORSPACE | STBIR_FLAG_PREMULTIPLIED_ALPHA;
flags |= STBIR_FLAG_ALPHA_USES_COLORSPACE | STBIR_FLAG_PREMULTIPLIED_ALPHA;
if (!(flags&STBIR_FLAG_ALPHA_USES_COLORSPACE) || !(flags&STBIR_FLAG_PREMULTIPLIED_ALPHA))
STBIR_ASSERT(alpha_channel >= 0 && alpha_channel < info->channels);
@ -1733,7 +1755,7 @@ static int stbir__resize_allocated(stbir__info *info,
}
static int stbir_resize_arbitrary(
static int stbir__resize_arbitrary(
void *alloc_context,
const void* input_data, int input_w, int input_h, int input_stride_in_bytes,
void* output_data, int output_w, int output_h, int output_stride_in_bytes,
@ -1751,7 +1773,7 @@ static int stbir_resize_arbitrary(
stbir__calculate_transform(&info, s0,t0,s1,t1,transform);
stbir__choose_filter(&info, h_filter, v_filter);
memory_required = stbir__calculate_memory(&info);
extra_memory = STBIR_MALLOC(NULL, memory_required);
extra_memory = STBIR_MALLOC(alloc_context, memory_required);
if (!extra_memory)
return 0;
@ -1760,9 +1782,9 @@ static int stbir_resize_arbitrary(
output_data, output_stride_in_bytes,
alpha_channel, flags, type,
edge_horizontal, edge_vertical,
colorspace, extra_memory, memory_required);
colorspace, extra_memory, memory_required);
STBIR_FREE(context, extra_memory);
STBIR_FREE(alloc_context, extra_memory);
return result;
}
@ -1771,7 +1793,7 @@ STBIRDEF int stbir_resize_uint8( const unsigned char *input_pixels , int inp
unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
int num_channels)
{
return stbir_resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
@ -1781,7 +1803,7 @@ STBIRDEF int stbir_resize_float( const float *input_pixels , int input_w , i
float *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
int num_channels)
{
return stbir_resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,-1,0, STBIR_TYPE_FLOAT, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
@ -1791,7 +1813,7 @@ STBIRDEF int stbir_resize_uint8_srgb(const unsigned char *input_pixels , int inp
unsigned char *output_pixels, int output_w, int output_h, int output_stride_in_bytes,
int num_channels, int alpha_channel, int flags)
{
return stbir_resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
@ -1802,7 +1824,7 @@ STBIRDEF int stbir_resize_uint8_srgb_edgemode(const unsigned char *input_pixels
int num_channels, int alpha_channel, int flags,
stbir_edge edge_wrap_mode)
{
return stbir_resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(NULL, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, STBIR_FILTER_DEFAULT, STBIR_FILTER_DEFAULT,
edge_wrap_mode, edge_wrap_mode, STBIR_COLORSPACE_SRGB);
@ -1814,7 +1836,7 @@ STBIRDEF int stbir_resize_uint8_generic( const unsigned char *input_pixels , int
stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
void *alloc_context)
{
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT8, filter, filter,
edge_wrap_mode, edge_wrap_mode, space);
@ -1826,7 +1848,7 @@ STBIRDEF int stbir_resize_uint16_generic(const stbir_uint16 *input_pixels , int
stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
void *alloc_context)
{
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_UINT16, filter, filter,
edge_wrap_mode, edge_wrap_mode, space);
@ -1839,7 +1861,7 @@ STBIRDEF int stbir_resize_float_generic( const float *input_pixels , int
stbir_edge edge_wrap_mode, stbir_filter filter, stbir_colorspace space,
void *alloc_context)
{
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, STBIR_TYPE_FLOAT, filter, filter,
edge_wrap_mode, edge_wrap_mode, space);
@ -1851,10 +1873,10 @@ STBIRDEF int stbir_resize( const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context)
{
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
edge_mode_horizontal, edge_mode_vertical, space);
@ -1866,7 +1888,7 @@ STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context,
float x_scale, float y_scale,
float x_offset, float y_offset)
@ -1876,7 +1898,7 @@ STBIRDEF int stbir_resize_subpixel(const void *input_pixels , int input_w , int
transform[1] = y_scale;
transform[2] = x_offset;
transform[3] = y_offset;
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
0,0,1,1,transform,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
edge_mode_horizontal, edge_mode_vertical, space);
@ -1887,11 +1909,11 @@ STBIRDEF int stbir_resize_region( const void *input_pixels , int input_w , int
stbir_datatype datatype,
int num_channels, int alpha_channel, int flags,
stbir_edge edge_mode_horizontal, stbir_edge edge_mode_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_filter filter_horizontal, stbir_filter filter_vertical,
stbir_colorspace space, void *alloc_context,
float s0, float t0, float s1, float t1)
{
return stbir_resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
return stbir__resize_arbitrary(alloc_context, input_pixels, input_w, input_h, input_stride_in_bytes,
output_pixels, output_w, output_h, output_stride_in_bytes,
s0,t0,s1,t1,NULL,num_channels,alpha_channel,flags, datatype, filter_horizontal, filter_vertical,
edge_mode_horizontal, edge_mode_vertical, space);

89
tests/resample_test.cpp
Unescape View File

@ -1,3 +1,5 @@
#include <malloc.h>
#if defined(_WIN32) && _MSC_VER > 1200
#define STBIR_ASSERT(x) \
if (!(x)) { \
@ -8,6 +10,49 @@
#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(void* context, size_t size)
{
if (!context)
return 0;
stbir_context* real_context = (stbir_context*)context;
if (size > real_context->size)
return 0;
return real_context->memory;
}
void stbir_free(void* context, void* memory)
{
}
void stbir_progress(float 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"
@ -131,7 +176,7 @@ int main(int argc, char** argv)
{
ftime(&initial_time_millis);
for (int i = 0; i < 100; i++)
stbir_resize_arbitrary(NULL, input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, 0, 0, 1, 1, NULL, n, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
stbir_resize(input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, STBIR_TYPE_UINT8, n, n - 1, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
ftime(&final_time_millis);
long lapsed_ms = (long)(final_time_millis.time - initial_time_millis.time) * 1000 + (final_time_millis.millitm - initial_time_millis.millitm);
printf("Resample: %dms\n", lapsed_ms);
@ -142,13 +187,21 @@ int main(int argc, char** argv)
average /= 10;
printf("Average: %dms\n", average);
#else
stbir_resize_arbitrary(NULL, input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, s0, t0, s1, t1, NULL, n, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
#endif
stbi_image_free(input_data);
stbi_write_png("output.png", out_w, out_h, n, output_data, out_stride);
#else
stbir_resize_region(input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, STBIR_TYPE_UINT8, n, n-1, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, s0, t0, s1, t1);
stbi_write_png("output-region.png", out_w, out_h, n, output_data, out_stride);
stbir_resize_subpixel(input_data + w * border * n + border * n, in_w, in_h, w*n, output_data, out_w, out_h, out_stride, STBIR_TYPE_UINT8, n, n-1, 0, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, in_w*s0, in_h*t0, 0.5f, 0.5f);
stbi_write_png("output-subpixel.png", out_w, out_h, n, output_data, out_stride);
stbi_image_free(input_data);
#endif
free(output_data);
@ -171,7 +224,7 @@ void resize_image(const char* filename, float width_percent, float height_percen
unsigned char* output_data = (unsigned char*)malloc(out_w * out_h * n);
stbir_resize_arbitrary(NULL, input_data, w, h, 0, output_data, out_w, out_h, 0, 0, 0, 1, 1, NULL, n, -1, 0, STBIR_TYPE_UINT8, filter, filter, edge, edge, colorspace);
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);
@ -206,7 +259,7 @@ void test_format(const char* file, float width_percent, float height_percent, st
T* output_data = (T*)malloc(new_w * new_h * n * sizeof(T));
stbir_resize_arbitrary(NULL, T_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, 1, 1, NULL, n, -1, 0, type, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, colorspace);
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);
@ -250,7 +303,7 @@ void test_float(const char* file, float width_percent, float height_percent, stb
float* output_data = (float*)malloc(new_w * new_h * n * sizeof(float));
stbir_resize_arbitrary(NULL, T_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, 1, 1, NULL, n, -1, 0, type, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, colorspace);
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);
@ -290,7 +343,7 @@ void test_channels(const char* file, float width_percent, float height_percent,
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, -1,0);
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);
@ -318,7 +371,7 @@ void test_subpixel(const char* file, float width_percent, float height_percent,
unsigned char* output_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(unsigned char));
stbir_resize_arbitrary(NULL, input_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, s1, t1, NULL, n, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
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_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context, 0, 0, s1, t1);
stbi_image_free(input_data);
@ -353,13 +406,13 @@ void test_premul(const char* file)
unsigned char* output_data = (unsigned char*)malloc(new_w * new_h * n * sizeof(unsigned char));
stbir_resize_arbitrary(NULL, input_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, 1, 1, NULL, n, 3, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
stbir_resize_uint8_generic(input_data, w, h, 0, output_data, new_w, new_h, 0, n, n - 1, 0, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
char output[200];
sprintf(output, "test-output/premul-%s", file);
stbi_write_png(output, new_w, new_h, n, output_data, 0);
stbir_resize_arbitrary(NULL, input_data, w, h, 0, output_data, new_w, new_h, 0, 0, 0, 1, 1, NULL, n, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
stbir_resize_uint8_generic(input_data, w, h, 0, output_data, new_w, new_h, 0, n, n - 1, STBIR_FLAG_PREMULTIPLIED_ALPHA, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_SRGB, &g_context);
sprintf(output, "test-output/nopremul-%s", file);
stbi_write_png(output, new_w, new_h, n, output_data, 0);
@ -381,13 +434,13 @@ void test_subpixel_1()
unsigned char output_data[16 * 16];
stbir_resize_arbitrary(NULL, image, 8, 8, 0, output_data, 16, 16, 0, 0, 0, 1, 1, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
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_arbitrary(NULL, image, 8, 8, 0, output_left, 8, 16, 0, 0, 0, 0.5f, 1, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
stbir_resize_arbitrary(NULL, image, 8, 8, 0, output_right, 8, 16, 0, 0.5f, 0, 1, 1, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
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++)
{
@ -426,8 +479,8 @@ void test_subpixel_2()
unsigned char output_data_1[16 * 16];
unsigned char output_data_2[16 * 16];
stbir_resize_arbitrary(NULL, image, 8, 8, 0, output_data_1, 16, 16, 0, 0, 0, 1, 1, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_WRAP, STBIR_EDGE_WRAP, STBIR_COLORSPACE_SRGB);
stbir_resize_arbitrary(NULL, large_image, 32, 32, 0, output_data_2, 16, 16, 0, 0.25f, 0.25f, 0.5f, 0.5f, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_SRGB);
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++)
{
@ -449,7 +502,7 @@ void test_subpixel_3()
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,-1, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_FILTER_CATMULLROM, STBIR_FILTER_CATMULLROM, STBIR_COLORSPACE_LINEAR, NULL, 0, 0, 1, 1);
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++)
@ -471,7 +524,7 @@ void test_subpixel_4()
unsigned char output[8 * 8];
stbir_resize_arbitrary(NULL, image, 8, 8, 0, output, 8, 8, 0, 0, 0, 1, 1, NULL, 1, -1, 0, STBIR_TYPE_UINT8, STBIR_FILTER_BILINEAR, STBIR_FILTER_BILINEAR, STBIR_EDGE_CLAMP, STBIR_EDGE_CLAMP, STBIR_COLORSPACE_LINEAR);
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_BILINEAR, STBIR_FILTER_BILINEAR, STBIR_COLORSPACE_LINEAR, &g_context, 0, 0, 1, 1);
STBIR_ASSERT(memcmp(image, output, 8 * 8) == 0);
}

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