GRAPHICS: Move opengles2 files to the opengl folder

graphics/opengl/shader.h

@@ -0,0 +1,166 @@
+/* ResidualVM - A 3D game interpreter
+ *
+ * ResidualVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef GRAPHICS_SHADER_H
+#define GRAPHICS_SHADER_H
+
+#include "common/file.h"
+#include "common/array.h"
+#include "common/ptr.h"
+
+#include "math/matrix3.h"
+#include "math/matrix4.h"
+#include "math/vector2d.h"
+#include "math/vector3d.h"
+#include "math/vector4d.h"
+
+#include "graphics/opengl/system_headers.h"
+
+namespace OpenGL {
+
+namespace BuiltinShaders {
+	extern const char *boxVertex, *boxFragment;
+	extern const char *compatVertex, *compatFragment;
+	extern const char *controlVertex, *controlFragment;
+}
+
+struct VertexAttrib {
+	VertexAttrib(uint32 idx, const char *name) :
+		_enabled(false), _idx(idx), _name(name), _vbo(0), _size(0),
+		_type(GL_FLOAT), _normalized(false), _stride(0), _offset(0) {}
+	bool _enabled;
+	uint32 _idx;
+	Common::String _name;
+	GLuint _vbo;
+	GLint _size;
+	GLenum _type;
+	bool _normalized;
+	GLsizei _stride;
+	size_t _offset;
+	float _const[4];
+};
+
+class Shader {
+	typedef Common::HashMap<Common::String, GLint> UniformsMap;
+
+public:
+	Shader* clone() {
+		return new Shader(*this);
+	}
+
+	void use(bool forceReload = false);
+
+	void setUniform(const char *uniform, const Math::Matrix4 &m) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniformMatrix4fv(pos, 1, GL_FALSE, m.getData());
+	}
+
+	void setUniform(const char* uniform, const Math::Matrix3 &m) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniformMatrix3fv(pos, 1, GL_FALSE, m.getData());
+	}
+
+	void setUniform(const char *uniform, const Math::Vector4d &v) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniform4fv(pos, 1, v.getData());
+	}
+
+	void setUniform(const char *uniform, const Math::Vector3d &v) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniform3fv(pos, 1, v.getData());
+	}
+
+	void setUniform(const char *uniform, const Math::Vector2d &v) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniform2fv(pos, 1, v.getData());
+	}
+
+	void setUniform(const char *uniform, unsigned int x) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniform1i(pos, x);
+	}
+
+	// Different name to avoid overload ambiguity
+	void setUniform1f(const char *uniform, float f) {
+		GLint pos = getUniformLocation(uniform);
+		if (pos != -1)
+			glUniform1f(pos, f);
+	}
+
+
+	GLint getUniformLocation(const char *uniform) const {
+		UniformsMap::iterator kv = _uniforms->find(uniform);
+		if (kv == _uniforms->end()) {
+			GLint ret = glGetUniformLocation(*_shaderNo, uniform);
+			_uniforms->setVal(uniform, ret);
+			return ret;
+		} else {
+			return kv->_value;
+		}
+	}
+
+	void enableVertexAttribute(const char *attrib, GLuint vbo, GLint size, GLenum type, GLboolean normalized, GLsizei stride, uint32 offset);
+	void disableVertexAttribute(const char *attrib, int size, const float *data);
+	template <int r>
+	void disableVertexAttribute(const char *attrib, const Math::Matrix<r,1> &m) {
+		disableVertexAttribute(attrib, r, m.getData());
+	}
+	VertexAttrib & getAttributeAt(uint32 idx);
+	VertexAttrib & getAttribute(const char *attrib);
+
+	static GLuint createBuffer(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage = GL_STATIC_DRAW);
+	static void freeBuffer(GLuint vbo);
+
+	static Shader* fromFiles(const char *vertex, const char *fragment, const char **attributes);
+	static Shader* fromFiles(const char *shared, const char **attributes) {
+		return fromFiles(shared, shared, attributes);
+	}
+
+	static Shader* fromStrings(const Common::String &name, const char *vertex, const char *fragment, const char **attributes);
+
+	void unbind();
+
+private:
+	Shader(const Common::String &name, GLuint vertexShader, GLuint fragmentShader, const char **attributes);
+
+	// Since this class is cloned using the implicit copy constructor,
+	// a reference counting pointer is used to ensure deletion of the OpenGL
+	// program upon destruction of the last clone.
+	Common::SharedPtr<GLuint> _shaderNo;
+
+	Common::String _name;
+
+	Common::Array<VertexAttrib> _attributes;
+	Common::SharedPtr<UniformsMap> _uniforms;
+
+	static Shader *_previousShader;
+};
+
+} // End of namespace OpenGL
+
+#endif