X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2F3dengfx%2Fsrc%2F3dengfx%2Fsdrman.cpp;fp=src%2F3dengfx%2Fsrc%2F3dengfx%2Fsdrman.cpp;h=8a52348742a3b68713a1f6181861ab350f1192b2;hb=6e23259dbabaeb1711a2a5ca25b9cb421f693759;hp=0000000000000000000000000000000000000000;hpb=fe068fa879814784c45e0cb2e65dac489e8f5594;p=summerhack

diff --git a/src/3dengfx/src/3dengfx/sdrman.cpp b/src/3dengfx/src/3dengfx/sdrman.cpp
new file mode 100644
index 0000000..8a52348
--- /dev/null
+++ b/src/3dengfx/src/3dengfx/sdrman.cpp
@@ -0,0 +1,151 @@
+/*
+This file is part of the 3dengfx, 3d visualization system.
+
+Copyright (c) 2004, 2005 John Tsiombikas <nuclear@siggraph.org>
+
+3dengfx is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+3dengfx is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with 3dengfx; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+/* Shader manager (shader manager)
+ * 
+ * author: John Tsiombikas 2005
+ */
+
+#include <string>
+#include <cstdio>
+#include <cstring>
+#include <cerrno>
+#include "3denginefx.hpp"
+#include "sdrman.hpp"
+#include "common/hashtable.hpp"
+#include "common/string_hash.hpp"
+#include "common/err_msg.h"
+#include "opengl.h"
+
+using std::string;
+using namespace glext;
+static HashTable<string, Shader> *shaders;
+
+static void delete_object(GLhandleARB obj) {
+	glDeleteObject(obj);
+}
+
+static void init_sdr_man() {
+	if(shaders) return;
+	shaders = new HashTable<string, Shader>;
+	shaders->set_hash_function(string_hash);
+	shaders->set_data_destructor(delete_object);
+}
+
+static inline bool check_shader_caps(int sdr_type, const char *name) {
+	if(!engfx_state::sys_caps.prog.shader_obj) {
+		error("Failed loading GLSL shader %s: system lacks GLSL capability", name);
+		return false;
+	}
+
+	if(sdr_type == PROG_VERTEX && !engfx_state::sys_caps.prog.glsl_vertex) {
+		error("Failed loading GLSL vertex shader %s: system lacks GLSL vertex shader capability", name);
+		return false;
+	}
+	
+	if(sdr_type == PROG_PIXEL && !engfx_state::sys_caps.prog.glsl_pixel) {
+		error("Failed loading GLSL pixel shader %s: system lacks GLSL pixel shader capability", name);
+		return false;
+	}
+
+	return true;
+}
+
+Shader add_shader_file(const char *fname, int sdr_type) {
+	FILE *fp = fopen(fname, "r");
+	if(!fp) {
+		error("Failed loading GLSL shader %s: %s\n", fname, strerror(errno));
+		return 0;
+	}
+
+	fseek(fp, 0, SEEK_END);
+	size_t src_size = ftell(fp);
+	fseek(fp, 0, SEEK_SET);
+
+	char *source = new char[src_size + 1];
+	src_size = fread(source, 1, src_size, fp);
+	source[src_size] = 0;
+	fclose(fp);
+
+	Shader sdr = add_shader_string(source, sdr_type, fname);
+	delete [] source;
+
+	return sdr;
+}
+
+Shader add_shader_string(const char *code, int sdr_type, const char *name) {
+	if(!shaders) init_sdr_man();
+	
+	if(!check_shader_caps(sdr_type, name)) return 0;
+
+	Shader sdr = glCreateShaderObject(sdr_type);
+	glShaderSource(sdr, 1, &code, 0);
+	glCompileShader(sdr);
+	
+	int success, info_len;
+	glGetObjectParameteriv(sdr, GL_OBJECT_COMPILE_STATUS_ARB, &success);
+	glGetObjectParameteriv(sdr, GL_OBJECT_INFO_LOG_LENGTH_ARB, &info_len);
+
+	char *info_str = 0;
+	
+	if(info_len) {
+		info_str = new char[info_len + 1];
+		glGetInfoLog(sdr, info_len, 0, info_str);
+	}
+	
+	if(success) {
+		if(info_len) {
+			info("%s compiled: %s", name, info_str);
+			delete [] info_str;
+		} else {
+			info("%s compiled successfully", name);
+		}
+
+		shaders->insert(name ? name : tmpnam(0), sdr);
+	} else {
+		if(info_len) {
+			error("%s compile failed: %s", name, info_str);
+			delete [] info_str;
+		} else {
+			error("%s compile failed", name);
+		}
+
+		glDeleteObject(sdr);
+		sdr = 0;
+	}
+
+	return sdr;
+}
+
+
+Shader get_shader(const char *name, int sdr_type) {
+	if(!shaders) init_sdr_man();
+	
+	Pair<string, Shader> *res = shaders->find(name);
+	if(res) return res->val;
+
+	return add_shader_file(name, sdr_type);
+}
+
+void destroy_shaders() {
+	info("Shutting down shader manager, destroying all shaders...");
+	delete shaders;
+	shaders = 0;
+}