Add SDL3_image unit

tests/testsdl3imageunit.pas

@@ -0,0 +1,58 @@
+{
+  This file is part of:
+
+    SDL3 for Pascal
+    (https://github.com/PascalGameDevelopment/SDL3-for-Pascal)
+    SPDX-License-Identifier: Zlib
+}
+
+{ Test SDL3_image routines }
+
+program testsdl3imageunit;
+
+uses
+  SDL3, SDL3_image;
+
+var
+  Window: PSDL_Window = nil;
+  Renderer: PSDL_Renderer = nil;
+  ImageSurface: PSDL_Surface = nil;
+  ImageTexture: PSDL_Texture = nil;
+
+procedure RenderImage(file_:PChar);
+begin
+  ImageSurface := IMG_Load(file_);
+  ImageTexture := SDL_CreateTextureFromSurface(Renderer, ImageSurface);
+  SDL_RenderClear(Renderer);
+  SDL_RenderTexture(Renderer, ImageTexture, nil, nil);
+  SDL_RenderPresent(Renderer);
+  SDL_Delay(1000);
+  SDL_RenderClear(Renderer);
+  SDL_DestroyTexture(ImageTexture);
+  SDL_DestroySurface(ImageSurface);
+end;
+
+begin
+
+  SDL_Log('Linked SDL3_image version: %d',[IMG_Version]);
+
+  if not SDL_Init(SDL_INIT_VIDEO) then
+  begin
+    SDL_Log('Couldn''t initialize SDL: %s', [SDL_GetError]);
+    Exit;
+  end;
+
+  if not SDL_CreateWindowAndRenderer('Images', 640, 480, 0, @Window, @Renderer) then
+  begin
+    SDL_Log('Couldn''t create window/renderer: %s', [SDL_GetError]);
+    Exit;
+  end;
+
+  RenderImage('sample.bmp');
+  RenderImage('sample.png');
+  RenderImage('sample.jpg');
+
+  SDL_Quit();
+
+end.
+