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This commit is contained in:
Jorge Rodriguez 2014-07-30 17:33:47 -07:00
parent fdc979e48b
commit 52ac93225a
1 changed files with 31 additions and 28 deletions
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59
stb_resample.h
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@ -167,7 +167,7 @@ extern "C" {
//// end header file /////////////////////////////////////////////////////
#endif // STBR_INCLUDE_STB_RESAMPLE_H
#ifdef STB_RESIZE_IMPLEMENTATION
#ifdef STB_RESAMPLE_IMPLEMENTATION
#ifndef STBR_ASSERT
#include <assert.h>
@ -596,10 +596,12 @@ static void stbr__calculate_coefficients_downsample(stbr__info* stbr_info, float
#ifdef STBR_DEBUG
static void stbr__check_downsample_coefficients(stbr__info* stbr_info)
{
for (int i = 0; i < stbr_info->output_w; i++)
int i;
for (i = 0; i < stbr_info->output_w; i++)
{
float total = 0;
for (int j = 0; j < stbr__get_horizontal_contributors(stbr_info->filter, stbr_info->input_w, stbr_info->output_w); j++)
int j;
for (j = 0; j < stbr__get_horizontal_contributors(stbr_info->filter, stbr_info->input_w, stbr_info->output_w); j++)
{
if (i >= stbr_info->horizontal_contributors[j].n0 && i <= stbr_info->horizontal_contributors[j].n1)
{
@ -673,7 +675,7 @@ static float* stbr__get_decode_buffer(stbr__info* stbr_info)
static void stbr__decode_scanline(stbr__info* stbr_info, int n)
{
int x;
int x, c;
int channels = stbr_info->channels;
int type = stbr_info->type;
int colorspace = stbr_info->colorspace;
@ -694,43 +696,43 @@ static void stbr__decode_scanline(stbr__info* stbr_info, int n)
switch (decode)
{
case STBR__DECODE(STBR_TYPE_UINT8, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = ((float)((const unsigned char*)input_data)[input_texel_index + n]) / 255;
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = ((float)((const unsigned char*)input_data)[input_texel_index + c]) / 255;
break;
case STBR__DECODE(STBR_TYPE_UINT8, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = stbr__srgb_uchar_to_linear_float[((const unsigned char*)input_data)[input_texel_index + n]];
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = stbr__srgb_uchar_to_linear_float[((const unsigned char*)input_data)[input_texel_index + c]];
break;
case STBR__DECODE(STBR_TYPE_UINT16, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = ((float)((const unsigned short*)input_data)[input_texel_index + n]) / 65535;
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = ((float)((const unsigned short*)input_data)[input_texel_index + c]) / 65535;
break;
case STBR__DECODE(STBR_TYPE_UINT16, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = stbr__srgb_to_linear(((float)((const unsigned short*)input_data)[input_texel_index + n]) / 65535);
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = stbr__srgb_to_linear(((float)((const unsigned short*)input_data)[input_texel_index + c]) / 65535);
break;
case STBR__DECODE(STBR_TYPE_UINT32, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = (float)(((double)((const unsigned int*)input_data)[input_texel_index + n]) / 4294967295);
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = (float)(((double)((const unsigned int*)input_data)[input_texel_index + c]) / 4294967295);
break;
case STBR__DECODE(STBR_TYPE_UINT32, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = stbr__srgb_to_linear((float)(((double)((const unsigned int*)input_data)[input_texel_index + n]) / 4294967295));
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = stbr__srgb_to_linear((float)(((double)((const unsigned int*)input_data)[input_texel_index + c]) / 4294967295));
break;
case STBR__DECODE(STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = ((const float*)input_data)[input_texel_index + n];
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = ((const float*)input_data)[input_texel_index + c];
break;
case STBR__DECODE(STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
decode_buffer[decode_texel_index + n] = stbr__srgb_to_linear(((const float*)input_data)[input_texel_index + n]);
for (c = 0; c < channels; c++)
decode_buffer[decode_texel_index + c] = stbr__srgb_to_linear(((const float*)input_data)[input_texel_index + c]);
break;
default:
@ -889,45 +891,46 @@ static float* stbr__get_ring_buffer_scanline(int get_scanline, float* ring_buffe
static stbr_inline void stbr__encode_scanline(void* output_buffer, int output_texel_index, float* encode_buffer, int encode_texel_index, int channels, int decode)
{
int n;
switch (decode)
{
case STBR__DECODE(STBR_TYPE_UINT8, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned char*)output_buffer)[output_texel_index + n] = (unsigned char)(stbr__saturate(encode_buffer[encode_texel_index + n]) * 255);
break;
case STBR__DECODE(STBR_TYPE_UINT8, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned char*)output_buffer)[output_texel_index + n] = stbr__linear_uchar_to_srgb_uchar[(unsigned char)(stbr__saturate(encode_buffer[encode_texel_index + n]) * 255)];
break;
case STBR__DECODE(STBR_TYPE_UINT16, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned short*)output_buffer)[output_texel_index + n] = (unsigned short)(stbr__saturate(encode_buffer[encode_texel_index + n]) * 65535);
break;
case STBR__DECODE(STBR_TYPE_UINT16, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned short*)output_buffer)[output_texel_index + n] = (unsigned short)(stbr__linear_to_srgb(stbr__saturate(encode_buffer[encode_texel_index + n])) * 65535);
break;
case STBR__DECODE(STBR_TYPE_UINT32, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned int*)output_buffer)[output_texel_index + n] = (unsigned int)(((double)stbr__saturate(encode_buffer[encode_texel_index + n])) * 4294967295);
break;
case STBR__DECODE(STBR_TYPE_UINT32, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((unsigned int*)output_buffer)[output_texel_index + n] = (unsigned int)(((double)stbr__linear_to_srgb(stbr__saturate(encode_buffer[encode_texel_index + n]))) * 4294967295);
break;
case STBR__DECODE(STBR_TYPE_FLOAT, STBR_COLORSPACE_LINEAR):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((float*)output_buffer)[output_texel_index + n] = stbr__saturate(encode_buffer[encode_texel_index + n]);
break;
case STBR__DECODE(STBR_TYPE_FLOAT, STBR_COLORSPACE_SRGB):
for (int n = 0; n < channels; n++)
for (n = 0; n < channels; n++)
((float*)output_buffer)[output_texel_index + n] = stbr__linear_to_srgb(stbr__saturate(encode_buffer[encode_texel_index + n]));
break;