define separator on apple

MinGW is not respecting the BUILD_SHARED_LIBS default value. Cool!

Reviewed-on: #2

.drone.yml

@@ -10,13 +10,14 @@ steps:
     - cd ./build
     - cmake -DCMAKE_C_COMPILER=/usr/bin/clang -S .. -B .
     - make
+    - mv ./cramcli ./cramcli-linux-amd64
 
 - name: build-windows
   image: thatcosmonaut/moonworks-build
   commands:
     - cmake -E make_directory ./windows-build
     - cd ./windows-build
-    - mingw64-cmake -S .. -B .
+    - mingw64-cmake -DBUILD_SHARED_LIBS=OFF -S .. -B .
     - make
 
 - name: gitea_release
@@ -26,7 +27,7 @@ steps:
     api_key:
       from_secret: gitea_token
     files:
-      - ./build/cramcli
+      - ./build/cramcli-linux-amd64
       - ./windows-build/cramcli.exe
   when:
     event: tag

CMakeLists.txt

@@ -5,8 +5,8 @@ option(BUILD_CLI "Build command line executable" ON)
 option(BUILD_SHARED_LIBS "Build shared library" OFF)
 
 SET(LIB_MAJOR_VERSION "1")
-SET(LIB_MINOR_VERSION "0")
+SET(LIB_MINOR_VERSION "1")
-SET(LIB_REVISION "0")
+SET(LIB_REVISION "1")
 SET(LIB_VERSION "${LIB_MAJOR_VERSION}.${LIB_MINOR_VERSION}.${LIB_REVISION}")
 
 # Build Type
@@ -56,6 +56,12 @@ if(BUILD_SHARED_LIBS)
 	set(LINKSTYLE PUBLIC)
 endif()
 
+if(BUILD_SHARED_LIBS)
+	add_library(Cram SHARED ${SOURCE_FILES})
+else()
+	add_library(Cram STATIC ${SOURCE_FILES})
+endif()
+
 if(BUILD_CLI)
 	file(GLOB CLI_SOURCES
 		tools/cli/lib/stb_image_write.h
@@ -80,11 +86,6 @@ if(BUILD_CLI)
 	endif()
 endif()
 
-if(BUILD_SHARED_LIBS)
-	add_library(Cram SHARED ${SOURCE_FILES})
-else()
-	add_library(Cram STATIC ${SOURCE_FILES})
-endif()
 
 # Build flags
 if(NOT MSVC)

README.md

@@ -11,13 +11,15 @@ Cram ships with a default command line interface implemented in C, but if you wi
 Command Line Usage
 -----
 ```sh
-Usage: cramcli input_dir output_dir atlas_name [--padding padding_value] [--notrim] [--dimension max_dimension]
+Usage: cramcli input_dir output_dir atlas_name [--padding padding_value] [--premultiply] [--notrim] [--dimension max_dimension]
 ```
 
 Cram CLI expects input images to be in PNG format and will output a PNG and a JSON metadata file that you can use to properly display the images in your game. Cram will recursively walk all the subdirectories of `input_dir` to generate your texture atlas.
 
 Padding is set to 0 by default. If you need to use linear filtering, set padding to at least 1. If you need to use texture compression, set padding to at least 4.
 
+Premultiply is off by default. If you will be using linear filtering on these images, you should turn this on or you will get strange artifacts.
+
 Trimming is on by default. Use `--notrim` if for some weird reason you want it off.
 
 Max dimension value is set to 8192 by default since that is a common max texture size for basically every GPU out there. Use `--dimension [max_dimension]` to override this maximum.

include/cram.h

@@ -54,6 +54,10 @@
 #define SEPARATOR '/'
 #endif
 
+#ifdef __APPLE__
+#define SEPARATOR '/'
+#endif
+
 #ifndef max
 #define max(x, y) (((x) > (y)) ? (x) : (y))
 #endif
@@ -68,8 +72,8 @@ extern "C"
 #endif /* __cplusplus */
 
 #define CRAM_MAJOR_VERSION 1
-#define CRAM_MINOR_VERSION 0
+#define CRAM_MINOR_VERSION 1
-#define CRAM_PATCH_VERSION 0
+#define CRAM_PATCH_VERSION 1
 
 #define CRAM_COMPILED_VERSION ( \
 	(CRAM_MAJOR_VERSION * 100 * 100) + \

tools/cli/main.c

@@ -89,7 +89,7 @@ static void dirwalk(char *dir)
 
 void print_help()
 {
-	fprintf(stdout, "Usage: cram input_dir output_dir atlas_name [--padding padding_value] [--notrim] [--dimension max_dimension]");
+	fprintf(stdout, "Usage: cram input_dir output_dir atlas_name [--padding padding_value] [--premultiply] [--notrim] [--dimension max_dimension]");
 }
 
 uint8_t check_dir_exists(char *path)
@@ -137,6 +137,8 @@ int main(int argc, char *argv[])
 	uint8_t *pixelData;
 	int32_t width;
 	int32_t height;
+	uint8_t premultiply;
+	uint8_t alpha;
 	char *arg;
 	char *inputDirPath = NULL;
 	char *outputDirPath = NULL;
@@ -156,6 +158,7 @@ int main(int argc, char *argv[])
 	createInfo.trim = 1;
 	createInfo.maxDimension = 8192;
 	createInfo.name = NULL;
+	premultiply = 0;
 
 	if (argc < 2)
 	{
@@ -177,6 +180,10 @@ int main(int argc, char *argv[])
 				return 1;
 			}
 		}
+		else if (strcmp(arg, "--premultiply") == 0)
+		{
+			premultiply = 1;
+		}
 		else if (strcmp(arg, "--notrim") == 0)
 		{
 			createInfo.trim = 0;
@@ -245,6 +252,19 @@ int main(int argc, char *argv[])
 	/* output pixel data */
 
 	Cram_GetPixelData(context, &pixelData, &width, &height);
+
+	if (premultiply)
+	{
+		for (i = 0; i < width * height * 4; i += 4)
+		{
+			alpha = pixelData[i + 3];
+
+			pixelData[i + 0] = (uint8_t) (((uint32_t) (pixelData[i + 0]) * alpha) / 255);
+			pixelData[i + 1] = (uint8_t) (((uint32_t) (pixelData[i + 1]) * alpha) / 255);
+			pixelData[i + 2] = (uint8_t) (((uint32_t) (pixelData[i + 2]) * alpha) / 255);
+		}
+	}
+
 	imageOutputFilename = malloc(strlen(outputDirPath) + strlen(createInfo.name) + 6);
 	strcpy(imageOutputFilename, outputDirPath);
 	strcat(imageOutputFilename, separatorString);