Add TIFF support

3 files changed, 30 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 09dded0..e8d49a1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .PHONY: clean
 
 CFLAGS = -g -W -Wall -std=c11 `sdl2-config --cflags`
-LDFLAGS = `sdl2-config --libs` -lpng -ljpeg
+LDFLAGS = `sdl2-config --libs` -lpng -ljpeg -ltiff
 
 TARGET = imv
 SOURCES = $(wildcard *.c)
diff --git a/loader.c b/loader.c
index 3615908..9164074 100644
--- a/loader.c
+++ b/loader.c
@@ -3,6 +3,7 @@
 
 SDL_Texture* imv_load_png(SDL_Renderer *r, const char* path);
 SDL_Texture* imv_load_jpeg(SDL_Renderer *r, const char* path);
+SDL_Texture* imv_load_tiff(SDL_Renderer *r, const char* path);
 
 SDL_Texture* imv_load_image(SDL_Renderer *r, const char* path)
 {
@@ -18,6 +19,8 @@ SDL_Texture* imv_load_image(SDL_Renderer *r, const char* path)
     return imv_load_png(r, path);
   } else if(strcasecmp(ext, ".jpeg") == 0 || strcasecmp(ext, ".jpg") == 0) {
     return imv_load_jpeg(r, path);
+  } else if(strcasecmp(ext, ".tif") == 0 || strcasecmp(ext, ".tiff") == 0) {
+    return imv_load_tiff(r, path);
   }
 
   fprintf(stderr,
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;
+}
+