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Add TIFF support

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This commit is contained in:
Harry Jeffery 2015-11-06 12:59:54 +00:00
parent f18d3f357d
commit ae299885d5
3 changed files with 30 additions and 1 deletions
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2
Makefile
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@ -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)

3
loader.c
View file

@ -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,

26
tiff.c Normal file
View file

@ -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;
}