Initial commit

engines/hpl1/engine/impl/CGProgram.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM 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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#include "hpl1/engine/impl/CGProgram.h"
+
+#ifdef HPL1_USE_OPENGL
+
+#include "hpl1/engine/impl/SDLTexture.h"
+#include "hpl1/engine/system/low_level_system.h"
+
+#include "hpl1/engine/math/Math.h"
+#include "hpl1/engine/system/String.h"
+
+#include "common/array.h"
+#include "common/str.h"
+#include "hpl1/debug.h"
+#include "math/matrix4.h"
+
+namespace hpl {
+
+static OpenGL::Shader *createShader(const char *vertex, const char *fragment) {
+	const char *attributes[] = {nullptr};
+	return OpenGL::Shader::fromFiles(vertex, fragment, attributes);
+}
+
+static void setSamplers(OpenGL::Shader *shader) {
+	shader->use();
+	shader->setUniform("tex0", 0);
+	shader->setUniform("tex1", 1);
+	shader->setUniform("tex2", 2);
+	shader->setUniform("tex3", 3);
+	shader->setUniform("tex4", 4);
+	shader->setUniform("tex5", 5);
+	shader->setUniform("tex6", 6);
+	shader->unbind();
+}
+
+cCGProgram::cCGProgram(const tString &vertex, const tString &fragment)
+	: iGpuProgram(vertex + " " + fragment), _shader(createShader(vertex.c_str(), fragment.c_str())) {
+
+	setSamplers(_shader);
+}
+
+cCGProgram::~cCGProgram() {
+	delete _shader;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::reload() {
+	return false;
+}
+
+//-----------------------------------------------------------------------
+
+void cCGProgram::unload() {
+}
+
+//-----------------------------------------------------------------------
+
+void cCGProgram::destroy() {
+	delete _shader;
+}
+
+//-----------------------------------------------------------------------
+
+void cCGProgram::Bind() {
+	Hpl1::logInfo(Hpl1::kDebugShaders, "binding shader %s\n", GetName().c_str());
+	_shader->use();
+}
+
+//-----------------------------------------------------------------------
+
+void cCGProgram::UnBind() {
+	Hpl1::logInfo(Hpl1::kDebugShaders, "unbinding shader %s\n", GetName().c_str());
+	_shader->unbind();
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetFloat(const tString &asName, float afX) {
+	_shader->setUniform1f(asName.c_str(), afX);
+	return true;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetVec2f(const tString &asName, float afX, float afY) {
+	_shader->setUniform(asName.c_str(), {afX, afY});
+	return true;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetVec3f(const tString &asName, float afX, float afY, float afZ) {
+	_shader->setUniform(asName.c_str(), {afX, afY, afZ});
+	return true;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetVec4f(const tString &asName, float afX, float afY, float afZ, float afW) {
+	_shader->setUniform(asName.c_str(), {afX, afY, afZ, afW});
+	return true;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetMatrixf(const tString &asName, const cMatrixf &mMtx) {
+	Math::Matrix4 mat4;
+	mat4.setData(mMtx.v);
+	mat4.transpose();
+	_shader->setUniform(asName.c_str(), mat4);
+	return true;
+}
+
+//-----------------------------------------------------------------------
+
+bool cCGProgram::SetMatrixf(const tString &asName, eGpuProgramMatrix mType,
+							eGpuProgramMatrixOp mOp) {
+	if (mType != eGpuProgramMatrix_ViewProjection)
+		error("unsupported shader matrix %d", mOp);
+	Math::Matrix4 modelView, projection;
+	glGetFloatv(GL_PROJECTION_MATRIX, projection.getData());
+	glGetFloatv(GL_MODELVIEW_MATRIX, modelView.getData());
+	_shader->setUniform(asName.c_str(), modelView * projection);
+	return true;
+}
+
+} // namespace hpl
+
+#endif // HPL1_USE_OPENGL