Add support for storage images in Renderer and PipelineState

[libs/gl.git] / source / backends / opengl / pipelinestate_backend.cpp

diff --git a/source/backends/opengl/pipelinestate_backend.cpp b/source/backends/opengl/pipelinestate_backend.cpp
index 3b8c6a5ae736c3f33543f9febb1c4b5a17696142..a2b8ab32717555bc329b85a515f2b58818738ff0 100644 (file)
--- a/source/backends/opengl/pipelinestate_backend.cpp
+++ b/source/backends/opengl/pipelinestate_backend.cpp
@@ -1,5 +1,6 @@
 #include <msp/gl/extensions/arb_direct_state_access.h>
 #include <msp/gl/extensions/arb_sampler_objects.h>
+#include <msp/gl/extensions/arb_shader_image_load_store.h>
 #include <msp/gl/extensions/arb_shader_objects.h>
 #include <msp/gl/extensions/arb_uniform_buffer_object.h>
 #include <msp/gl/extensions/arb_vertex_array_object.h>
@@ -128,7 +129,7 @@ void OpenGLPipelineState::apply() const
                                                        call.func(call.location, call.size, data+call.location*16);
                                        }
                                }
-                               else if(r.type==PipelineState::TEXTURE)
+                               else if(r.type==PipelineState::SAMPLED_TEXTURE)
                                {
                                        if(ARB_direct_state_access)
                                                glBindTextureUnit(r.binding, r.texture->id);
@@ -145,6 +146,14 @@ void OpenGLPipelineState::apply() const
                                        glBindSampler(r.binding, r.sampler->id);
                                        r.sampler->refresh();
                                }
+                               else if(r.type==PipelineState::STORAGE_TEXTURE)
+                               {
+                                       static Require _req(ARB_shader_image_load_store);
+                                       GLenum gl_format = get_gl_pixelformat(r.texture->get_format());
+                                       glBindImageTexture(r.binding, r.texture->id, 0, true, 0, GL_READ_WRITE, gl_format);
+
+                                       dev_state.bound_storage_textures[r.binding] = 1;
+                               }
                        }
 
                        r.changed = false;
@@ -260,6 +269,13 @@ void OpenGLPipelineState::clear()
                                dev_state.bound_tex_targets[i] = 0;
                        }
 
+               for(unsigned i=0; i<dev_state.bound_storage_textures.size(); ++i)
+                       if(dev_state.bound_storage_textures[i])
+                       {
+                               glBindImageTexture(i, 0, 0, true, 0, GL_READ_ONLY, GL_RGBA8);
+                               dev_state.bound_storage_textures[i] = 0;
+                       }
+
                for(unsigned i=0; i<dev_state.bound_uniform_blocks.size(); ++i)
                        if(dev_state.bound_uniform_blocks[i])
                        {