add gif decoder via stbi

not adding encoder (not available in stbi)

Author: MartinPulec

libgpujpeg/gpujpeg_common.h

@@ -325,6 +325,7 @@ enum gpujpeg_image_file_format {
     /// RGBA file format, simple data format without header [R G B A] [R G B A] ...
     GPUJPEG_IMAGE_FILE_RGBA,
     GPUJPEG_IMAGE_FILE_BMP,
+    GPUJPEG_IMAGE_FILE_GIF,
     GPUJPEG_IMAGE_FILE_PNG,
     GPUJPEG_IMAGE_FILE_TGA,
     /// PNM file format

src/gpujpeg_common.c

@@ -393,6 +393,7 @@ gpujpeg_image_get_file_format(const char* filename)
         { "jpeg", GPUJPEG_IMAGE_FILE_JPEG},
         { "jfif", GPUJPEG_IMAGE_FILE_JPEG},
         { "bmp",  GPUJPEG_IMAGE_FILE_BMP},
+        { "gif",  GPUJPEG_IMAGE_FILE_GIF},
         { "png",  GPUJPEG_IMAGE_FILE_BMP},
         { "tga",  GPUJPEG_IMAGE_FILE_TGA},
         //{ "pbm",  GPUJPEG_IMAGE_FILE_PNM},
@@ -441,6 +442,7 @@ static enum { FF_CS_NONE, FF_CS_RGB, FF_CS_YCBCR } get_file_type_cs(enum gpujpeg
     case GPUJPEG_IMAGE_FILE_RGB:
     case GPUJPEG_IMAGE_FILE_RGBA:
     case GPUJPEG_IMAGE_FILE_BMP:
+    case GPUJPEG_IMAGE_FILE_GIF:
     case GPUJPEG_IMAGE_FILE_PNG:
     case GPUJPEG_IMAGE_FILE_TGA:
     case GPUJPEG_IMAGE_FILE_PGM:
@@ -1289,6 +1291,7 @@ gpujpeg_image_get_properties(const char *filename, struct gpujpeg_image_paramete
             param_image->pixel_format = GPUJPEG_420_U8_P0P1P2;
             break;
         case GPUJPEG_IMAGE_FILE_BMP:
+        case GPUJPEG_IMAGE_FILE_GIF:
         case GPUJPEG_IMAGE_FILE_PNG:
         case GPUJPEG_IMAGE_FILE_TGA:
         case GPUJPEG_IMAGE_FILE_PAM:

src/utils/image_delegate.c

@@ -58,7 +58,6 @@ static void*
 gpujpeg_cuda_realloc_sized_host(void* ptr, int oldsz, int newsz);
 #define STBI_NO_JPEG
 #define STBI_NO_PSD
-#define STBI_NO_GIF
 #define STBI_NO_HDR
 #define STBI_NO_PIC
 #define STBI_NO_PNM
@@ -448,6 +447,10 @@ stbi_save_delegate(const char* filename, const struct gpujpeg_image_parameters*
     if ( strcasecmp(ext, "bmp") == 0 ) {
         write.func = stbi_write_bmp;
     }
+    else if ( strcasecmp(ext, "gif") == 0 ) {
+        ERROR_MSG("[stbi] Only gif decoder is present, the encoder is not supported!\n");
+        return -1;
+    }
     else if ( strcasecmp(ext, "png") == 0 ) {
         write.func_stridden = stbi_write_png;
         stride_bytes = param_image->width * comp_count;
@@ -501,6 +504,10 @@ stbi_image_probe_delegate(const char* filename, enum gpujpeg_image_file_format f
         param_image->color_space = GPUJPEG_RGB;
         param_image->pixel_format = GPUJPEG_444_U8_P012;
     }
+    else if ( comp == 4 ) {
+        param_image->color_space = GPUJPEG_RGB;
+        param_image->pixel_format = GPUJPEG_4444_U8_P0123;
+    }
     else {
         ERROR_MSG("[stbi] Unsupported channel count %d for %s\n", comp, filename);
         return -1;
@@ -577,6 +584,7 @@ tst_image_load_delegate(const char* filename, size_t* image_size, void** image_d
 image_load_delegate_t gpujpeg_get_image_load_delegate(enum gpujpeg_image_file_format format) {
     switch (format) {
     case GPUJPEG_IMAGE_FILE_BMP:
+    case GPUJPEG_IMAGE_FILE_GIF:
     case GPUJPEG_IMAGE_FILE_PNG:
     case GPUJPEG_IMAGE_FILE_TGA:
         return stbi_load_delegate;
@@ -607,6 +615,7 @@ image_probe_delegate_t gpujpeg_get_image_probe_delegate(enum gpujpeg_image_file_
 {
     switch (format) {
     case GPUJPEG_IMAGE_FILE_BMP:
+    case GPUJPEG_IMAGE_FILE_GIF:
     case GPUJPEG_IMAGE_FILE_PNG:
     case GPUJPEG_IMAGE_FILE_TGA:
         return stbi_image_probe_delegate;
@@ -637,6 +646,7 @@ image_save_delegate_t gpujpeg_get_image_save_delegate(enum gpujpeg_image_file_fo
 {
     switch (format) {
     case GPUJPEG_IMAGE_FILE_BMP:
+    case GPUJPEG_IMAGE_FILE_GIF:
     case GPUJPEG_IMAGE_FILE_PNG:
     case GPUJPEG_IMAGE_FILE_TGA:
         return stbi_save_delegate;