[core] introduce gfx::RenderPass

5 files changed, 71 insertions, 0 deletions

diff --git a/src/mbgl/gl/command_encoder.cpp b/src/mbgl/gl/command_encoder.cpp
index e1bf5e1187..26d1008789 100644
--- a/src/mbgl/gl/command_encoder.cpp
+++ b/src/mbgl/gl/command_encoder.cpp
@@ -1,4 +1,5 @@
 #include <mbgl/gl/command_encoder.hpp>
+#include <mbgl/gl/render_pass.hpp>
 #include <mbgl/gl/context.hpp>
 #include <mbgl/gl/debugging_extension.hpp>
 #include <mbgl/platform/gl_functions.hpp>
@@ -13,6 +14,11 @@ CommandEncoder::~CommandEncoder() {
     context.performCleanup();
 }
 
+std::unique_ptr<gfx::RenderPass>
+CommandEncoder::createRenderPass(const char* name, const gfx::RenderPassDescriptor& descriptor) {
+    return std::make_unique<gl::RenderPass>(*this, name, descriptor);
+}
+
 void CommandEncoder::pushDebugGroup(const char* name) {
     (void)name;
 #ifndef NDEBUG
diff --git a/src/mbgl/gl/command_encoder.hpp b/src/mbgl/gl/command_encoder.hpp
index b4f7d2af13..8074000034 100644
--- a/src/mbgl/gl/command_encoder.hpp
+++ b/src/mbgl/gl/command_encoder.hpp
@@ -6,6 +6,7 @@ namespace mbgl {
 namespace gl {
 
 class Context;
+class RenderPass;
 
 class CommandEncoder final : public gfx::CommandEncoder {
 public:
@@ -14,6 +15,10 @@ public:
 
     ~CommandEncoder() override;
 
+    friend class RenderPass;
+
+    std::unique_ptr<gfx::RenderPass> createRenderPass(const char* name, const gfx::RenderPassDescriptor&) override;
+
 private:
     void pushDebugGroup(const char* name) override;
     void popDebugGroup() override;
diff --git a/src/mbgl/gl/program.hpp b/src/mbgl/gl/program.hpp
index 023b738b93..3757c442de 100644
--- a/src/mbgl/gl/program.hpp
+++ b/src/mbgl/gl/program.hpp
@@ -156,6 +156,7 @@ public:
     };
 
     void draw(gfx::Context& genericContext,
+              gfx::RenderPass&,
               const gfx::DrawMode& drawMode,
               const gfx::DepthMode& depthMode,
               const gfx::StencilMode& stencilMode,
diff --git a/src/mbgl/gl/render_pass.cpp b/src/mbgl/gl/render_pass.cpp
new file mode 100644
index 0000000000..b327f7954f
--- /dev/null
+++ b/src/mbgl/gl/render_pass.cpp
@@ -0,0 +1,28 @@
+#include <mbgl/gl/render_pass.hpp>
+#include <mbgl/gl/command_encoder.hpp>
+#include <mbgl/gl/renderable_resource.hpp>
+#include <mbgl/gl/context.hpp>
+
+namespace mbgl {
+namespace gl {
+
+RenderPass::RenderPass(gl::CommandEncoder& commandEncoder_,
+                       const char* name,
+                       const gfx::RenderPassDescriptor& descriptor)
+    : commandEncoder(commandEncoder_), debugGroup(commandEncoder.createDebugGroup(name)) {
+    descriptor.renderable.getResource<gl::RenderableResource>().bind();
+    const auto clearDebugGroup(commandEncoder.createDebugGroup("clear"));
+    commandEncoder.context.clear(descriptor.clearColor, descriptor.clearDepth,
+                                 descriptor.clearStencil);
+}
+
+void RenderPass::pushDebugGroup(const char* name) {
+    commandEncoder.pushDebugGroup(name);
+}
+
+void RenderPass::popDebugGroup() {
+    commandEncoder.popDebugGroup();
+}
+
+} // namespace gl
+} // namespace mbgl
diff --git a/src/mbgl/gl/render_pass.hpp b/src/mbgl/gl/render_pass.hpp
new file mode 100644
index 0000000000..85a56243a6
--- /dev/null
+++ b/src/mbgl/gl/render_pass.hpp
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <mbgl/gfx/render_pass.hpp>
+
+namespace mbgl {
+namespace gfx {
+
+class CommandEncoder;
+
+} // namespace gfx
+
+namespace gl {
+
+class CommandEncoder;
+class Context;
+
+class RenderPass final : public gfx::RenderPass {
+public:
+    RenderPass(gl::CommandEncoder&, const char* name, const gfx::RenderPassDescriptor&);
+
+private:
+    void pushDebugGroup(const char* name) override;
+    void popDebugGroup() override;
+
+private:
+    gl::CommandEncoder& commandEncoder;
+    const gfx::DebugGroup<gfx::CommandEncoder> debugGroup;
+};
+
+} // namespace gl
+} // namespace mbgl