Add TIFF support

1 files changed, 26 insertions, 0 deletions

diff --git a/tiff.c b/tiff.c
new file mode 100644
index 0000000..eb38c4d
--- /dev/null
+++ b/tiff.c
@@ -0,0 +1,26 @@
+#include <SDL2/SDL.h>
+#include <tiffio.h>
+
+SDL_Texture* imv_load_tiff(SDL_Renderer *r, const char* path)
+{
+  TIFF* tif = TIFFOpen(path, "r");
+  if(!tif) {
+    return NULL;
+  }
+  SDL_Texture *img = NULL;
+  uint32 w, h;
+  TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
+  TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
+  size_t npixels = w * h;
+  uint32 *pixels = (uint32*) malloc(npixels * sizeof (uint32));
+  if (TIFFReadRGBAImageOriented(tif, w, h, pixels, ORIENTATION_TOPLEFT, 0)) {
+    img = SDL_CreateTexture(r,
+        SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STATIC, w, h);
+    SDL_Rect area = {0,0,w,h};
+    SDL_UpdateTexture(img, &area, pixels, sizeof(uint32) * w);
+  }
+  free(pixels);
+  TIFFClose(tif);
+  return img;
+}
+