Wrong color with SDL on HDR image? - c

Question

I have my program that is displaying my image:
#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
void Clean_ressources(SDL_Window *w, SDL_Renderer *r, SDL_Texture *t)
{
if (t!= NULL)
SDL_DestroyTexture(t);
if (t!= NULL)
SDL_DestroyRenderer(r);
if (w!= NULL)
SDL_DestroyWindow(w);
SDL_Quit();
}
void SDL_ExitWithError(const char *message);
int main(int argc, char **argv)
{
SDL_Window *window = NULL;
SDL_Renderer *renderer = NULL;
SDL_Surface *surface = NULL;
SDL_Texture *texture, *tmp = NULL;
SDL_Rect dest_rest = {0, 0, 640, 480};
//SDL Init
if(SDL_Init(SDL_INIT_VIDEO) != 0)
SDL_ExitWithError("SDL init failed");
//Create Window
window = SDL_CreateWindow("My Viewer 10 bits", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED ,1000, 1000, 0);
if(window == NULL)
{
Clean_ressources(NULL, NULL, NULL);
SDL_ExitWithError("Window creation failed");
}
//Create Renderer
renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_SOFTWARE);
if(renderer == NULL)
{
Clean_ressources(window, NULL, NULL);
SDL_ExitWithError("Renderer creation failed");
}
//Load image
// https://github.com/codelogic/wide-gamut-tests/blob/master/R2020-sRGB-red.jpg
surface = IMG_Load("src/red.jpg");
if(surface == NULL)
{
Clean_ressources(window, renderer, NULL);
SDL_ExitWithError("Load image failed");
}
tmp = SDL_CreateTextureFromSurface(renderer, surface);
SDL_FreeSurface(surface);
if(tmp == NULL)
{
Clean_ressources(window, renderer, NULL);
SDL_ExitWithError("Create texture from surface failed");
}
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB2101010, SDL_TEXTUREACCESS_TARGET, surface->w, surface->h);
if(texture == NULL)
{
Clean_ressources(window, renderer, NULL);
SDL_ExitWithError("Create texture failed");
}
if(SDL_QueryTexture(texture, NULL, NULL, &dest_rest.w, &dest_rest.h) != 0)
{
Clean_ressources(window, renderer, NULL);
SDL_ExitWithError("Query texture failed");
}
if(SDL_RenderCopy(renderer, tmp, NULL, NULL) != 0)
{
Clean_ressources(window, renderer, NULL);
SDL_ExitWithError("Render copy failed");
}
SDL_SetRenderTarget(renderer, texture);
SDL_RenderPresent(renderer);
SDL_DestroyTexture(tmp);
SDL_FreeSurface(surface);
SDL_SetRenderTarget(renderer, NULL);
/*--------------------------------------------------------------*/
SDL_bool program_launched = SDL_TRUE;
while(program_launched)
{
SDL_Event event;
while(SDL_PollEvent(&event))
{
switch(event.type)
{
case SDL_QUIT:
program_launched = SDL_FALSE;
break;
default:
break;
}
}
}
/*--------------------------------------------------------------*/
Clean_ressources(window, renderer, texture);
SDL_Quit();
return EXIT_SUCCESS;
}
void SDL_ExitWithError(const char *message)
{
SDL_Log("ERROR :%s > %s\n", message, SDL_GetError());
exit(EXIT_FAILURE);
}
I tried with different image and everything seems fine, but with this image I don't understand the color is very different in my window.
Here is the image in input:
And this is the image in my window in SDL2:
I'm aware that this image is not a high dynamic range color but I would like to display in my HDR screen an image that have HDR color (10 bits depth color) in SDL but if my sdl window have color problem I won't be able to do that.
I also tried with SDL_PIXELFORMAT_RGBA8888 and nothing changed.