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Diffstat (limited to 'backends/graphics/opengl/pipelines/shader.cpp')
-rw-r--r-- | backends/graphics/opengl/pipelines/shader.cpp | 73 |
1 files changed, 73 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..42f511d147 --- /dev/null +++ b/backends/graphics/opengl/pipelines/shader.cpp @@ -0,0 +1,73 @@ +/* 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() + : _activeShader(nullptr) { +} + +void ShaderPipeline::activate() { + GL_CALL(glEnableVertexAttribArray(kPositionAttribLocation)); + GL_CALL(glEnableVertexAttribArray(kTexCoordAttribLocation)); + + if (g_context.multitextureSupported) { + GL_CALL(glActiveTexture(GL_TEXTURE0)); + } +} + +Shader *ShaderPipeline::setShader(Shader *shader) { + Shader *oldShader = _activeShader; + + _activeShader = shader; + if (_activeShader && _activeFramebuffer) { + _activeShader->activate(_activeFramebuffer->getProjectionMatrix()); + } + + return oldShader; +} + +void ShaderPipeline::setColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a) { + GL_CALL(glVertexAttrib4f(kColorAttribLocation, r, g, b, a)); +} + +void ShaderPipeline::drawTexture(const GLTexture &texture, const GLfloat *coordinates) { + texture.bind(); + + GL_CALL(glVertexAttribPointer(kTexCoordAttribLocation, 2, GL_FLOAT, GL_FALSE, 0, texture.getTexCoords())); + GL_CALL(glVertexAttribPointer(kPositionAttribLocation, 2, GL_FLOAT, GL_FALSE, 0, coordinates)); + GL_CALL(glDrawArrays(GL_TRIANGLE_STRIP, 0, 4)); +} + +void ShaderPipeline::setProjectionMatrix(const GLfloat *projectionMatrix) { + if (_activeShader) { + _activeShader->activate(projectionMatrix); + } +} +#endif // !USE_FORCED_GLES + +} // End of namespace OpenGL |