Merge pull request #711 from lordhoto/opengl-revamp

OpenGLGraphicsManager: Revamp

1 files changed, 72 insertions, 0 deletions

diff --git a/backends/graphics/opengl/pipelines/shader.cpp b/backends/graphics/opengl/pipelines/shader.cpp
new file mode 100644
index 0000000000..c7befe22b8
--- /dev/null
+++ b/backends/graphics/opengl/pipelines/shader.cpp
@@ -0,0 +1,72 @@
+/* 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 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.
+ *
+ */
+
+#include "backends/graphics/opengl/pipelines/shader.h"
+#include "backends/graphics/opengl/shader.h"
+#include "backends/graphics/opengl/framebuffer.h"
+
+namespace OpenGL {
+
+#if !USE_FORCED_GLES
+ShaderPipeline::ShaderPipeline(Shader *shader)
+    : _activeShader(shader) {
+	_vertexAttribLocation = shader->getAttributeLocation("position");
+	_texCoordAttribLocation = shader->getAttributeLocation("texCoordIn");
+	_colorAttribLocation = shader->getAttributeLocation("blendColorIn");
+}
+
+void ShaderPipeline::activateInternal() {
+	GL_CALL(glEnableVertexAttribArray(_vertexAttribLocation));
+	GL_CALL(glEnableVertexAttribArray(_texCoordAttribLocation));
+
+	if (g_context.multitextureSupported) {
+		GL_CALL(glActiveTexture(GL_TEXTURE0));
+	}
+
+	_activeShader->activate();
+}
+
+void ShaderPipeline::deactivateInternal() {
+	GL_CALL(glDisableVertexAttribArray(_vertexAttribLocation));
+	GL_CALL(glDisableVertexAttribArray(_texCoordAttribLocation));
+
+	_activeShader->deactivate();
+}
+
+void ShaderPipeline::setColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a) {
+	GL_CALL(glVertexAttrib4f(_colorAttribLocation, r, g, b, a));
+}
+
+void ShaderPipeline::drawTexture(const GLTexture &texture, const GLfloat *coordinates) {
+	texture.bind();
+
+	GL_CALL(glVertexAttribPointer(_texCoordAttribLocation, 2, GL_FLOAT, GL_FALSE, 0, texture.getTexCoords()));
+	GL_CALL(glVertexAttribPointer(_vertexAttribLocation, 2, GL_FLOAT, GL_FALSE, 0, coordinates));
+	GL_CALL(glDrawArrays(GL_TRIANGLE_STRIP, 0, 4));
+}
+
+void ShaderPipeline::setProjectionMatrix(const GLfloat *projectionMatrix) {
+	_activeShader->setUniform("projection", new ShaderUniformMatrix44(projectionMatrix));
+}
+#endif // !USE_FORCED_GLES
+
+} // End of namespace OpenGL