2 files changed, 172 insertions, 0 deletions
diff --git a/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Main.cpp b/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Main.cpp
new file mode 100644
index 0000000000..4f38dfe0dc
--- /dev/null
+++ b/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Main.cpp
@@ -0,0 +1,159 @@
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "glsl_optimizer.h"
+
+static glslopt_ctx* gContext = 0;
+
+static int printhelp(const char* msg)
+{
+	if (msg) printf("%s\n\n\n", msg);
+	printf("Usage: glslopt <-f|-v> <input shader> [<output shader>]\n");
+	printf("\t-f : fragment shader (default)\n");
+	printf("\t-v : vertex shader\n");
+	printf("\t-1 : target OpenGL (default)\n");
+	printf("\t-2 : target OpenGL ES 2.0\n");
+	printf("\t-3 : target OpenGL ES 3.0\n");
+	printf("\n\tIf no output specified, output is to [input].out.\n");
+	return 1;
+}
+
+static bool init(glslopt_target target)
+{
+	gContext = glslopt_initialize(target);
+	if( !gContext )
+		return false;
+	return true;
+}
+
+static void term()
+{
+	glslopt_cleanup(gContext);
+}
+
+static char* loadFile(const char* filename)
+{
+	FILE* file = fopen(filename, "rt");
+	if( !file )
+	{
+		printf("Failed to open %s for reading\n", filename);
+		return 0;
+	}
+
+	fseek(file, 0, SEEK_END);
+	const int size = ftell(file);
+	fseek(file, 0, SEEK_SET);
+
+	char* result = new char[size+1];
+	const int count = (int)fread(result, 1, size, file);
+	result[count] = 0;
+
+	fclose(file);
+	return result;
+}
+
+static bool saveFile(const char* filename, const char* data)
+{
+	int size = (int)strlen(data);
+
+	FILE* file = fopen(filename, "wt");
+	if( !file )
+	{
+		printf( "Failed to open %s for writing\n", filename);
+		return false;
+	}
+
+	if( 1 != fwrite(data,size,1,file) )
+	{
+		printf( "Failed to write to %s\n", filename);
+		fclose(file);
+		return false;
+	}
+
+	fclose(file);
+	return true;
+}
+
+static bool compileShader(const char* dstfilename, const char* srcfilename, bool vertexShader)
+{
+	const char* originalShader = loadFile(srcfilename);
+	if( !originalShader )
+		return false;
+
+	const glslopt_shader_type type = vertexShader ? kGlslOptShaderVertex : kGlslOptShaderFragment;
+
+	glslopt_shader* shader = glslopt_optimize(gContext, type, originalShader, 0);
+	if( !glslopt_get_status(shader) )
+	{
+		printf( "Failed to compile %s:\n\n%s\n", srcfilename, glslopt_get_log(shader));
+		return false;
+	}
+
+	const char* optimizedShader = glslopt_get_output(shader);
+
+	if( !saveFile(dstfilename, optimizedShader) )
+		return false;
+
+	delete[] originalShader;
+	return true;
+}
+
+int main(int argc, char* argv[])
+{
+	if( argc < 3 )
+		return printhelp(NULL);
+
+	bool vertexShader = false, freename = false;
+	glslopt_target languageTarget = kGlslTargetOpenGL;
+	const char* source = 0;
+	char* dest = 0;
+
+	for( int i=1; i < argc; i++ )
+	{
+		if( argv[i][0] == '-' )
+		{
+			if( 0 == strcmp("-v", argv[i]) )
+				vertexShader = true;
+			else if( 0 == strcmp("-f", argv[i]) )
+				vertexShader = false;
+			else if( 0 == strcmp("-1", argv[i]) )
+				languageTarget = kGlslTargetOpenGL;
+			else if( 0 == strcmp("-2", argv[i]) )
+				languageTarget = kGlslTargetOpenGLES20;
+			else if( 0 == strcmp("-3", argv[i]) )
+				languageTarget = kGlslTargetOpenGLES30;
+		}
+		else
+		{
+			if( source == 0 )
+				source = argv[i];
+			else if( dest == 0 )
+				dest = argv[i];
+		}
+	}
+
+	if( !source )
+		return printhelp("Must give a source");
+
+	if( !init(languageTarget) )
+	{
+		printf("Failed to initialize glslopt!\n");
+		return 1;
+	}
+
+	if ( !dest ) {
+		dest = (char *) calloc(strlen(source)+5, sizeof(char));
+		snprintf(dest, strlen(source)+5, "%s.out", source);
+		freename = true;
+	}
+
+	int result = 0;
+	if( !compileShader(dest, source, vertexShader) )
+		result = 1;
+
+	if( freename ) free(dest);
+
+	term();
+	return result;
+}
diff --git a/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Readme b/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Readme
new file mode 100644
index 0000000000..7d28ecdda6
--- /dev/null
+++ b/third_party/rust/glslopt/glsl-optimizer/contrib/glslopt/Readme
@@ -0,0 +1,13 @@
+This is a small sample program to get you quickly up and running, it transforms an input textfile
+to an output textfile. The input source textfile should be a fully preprocessed GLSL shader and
+the output should be a simple shader in textform.
+
+The project file is generated by BadgerConfig.
+
+VS2005
+BadgerConfig
+
+
+
+
+Jim Tilander, Santa Monica 2010