[core] merge gl::ObjectStore into gl::Context

1 files changed, 95 insertions, 0 deletions

diff --git a/src/mbgl/gl/context.cpp b/src/mbgl/gl/context.cpp
new file mode 100644
index 0000000000..101e11f4d8
--- /dev/null
+++ b/src/mbgl/gl/context.cpp
@@ -0,0 +1,95 @@
+#include <mbgl/gl/context.hpp>
+
+namespace mbgl {
+namespace gl {
+
+Context::~Context() {
+    reset();
+}
+
+void Context::reset() {
+    std::copy(pooledTextures.begin(), pooledTextures.end(), std::back_inserter(abandonedTextures));
+    pooledTextures.resize(0);
+    performCleanup();
+}
+
+namespace {
+
+template <typename Fn>
+void applyStateFunction(Context& context, Fn&& fn) {
+    fn(context.stencilFunc);
+    fn(context.stencilMask);
+    fn(context.stencilTest);
+    fn(context.stencilOp);
+    fn(context.depthRange);
+    fn(context.depthMask);
+    fn(context.depthTest);
+    fn(context.depthFunc);
+    fn(context.blend);
+    fn(context.blendFunc);
+    fn(context.blendColor);
+    fn(context.colorMask);
+    fn(context.clearDepth);
+    fn(context.clearColor);
+    fn(context.clearStencil);
+    fn(context.program);
+    fn(context.lineWidth);
+    fn(context.activeTexture);
+    fn(context.bindFramebuffer);
+    fn(context.viewport);
+#ifndef GL_ES_VERSION_2_0
+    fn(context.pixelZoom);
+    fn(context.rasterPos);
+#endif // GL_ES_VERSION_2_0
+    for (auto& tex : context.texture) {
+        fn(tex);
+    }
+    fn(context.vertexBuffer);
+    fn(context.elementBuffer);
+    fn(context.vertexArrayObject);
+}
+
+} // namespace
+
+void Context::resetState() {
+    applyStateFunction(*this, [](auto& state) { state.reset(); });
+}
+
+void Context::setDirtyState() {
+    applyStateFunction(*this, [](auto& state) { state.setDirty(); });
+}
+
+void Context::performCleanup() {
+    for (GLuint id : abandonedPrograms) {
+        MBGL_CHECK_ERROR(glDeleteProgram(id));
+    }
+    abandonedPrograms.clear();
+
+    for (GLuint id : abandonedShaders) {
+        MBGL_CHECK_ERROR(glDeleteShader(id));
+    }
+    abandonedShaders.clear();
+
+    if (!abandonedBuffers.empty()) {
+        MBGL_CHECK_ERROR(glDeleteBuffers(int(abandonedBuffers.size()), abandonedBuffers.data()));
+        abandonedBuffers.clear();
+    }
+
+    if (!abandonedTextures.empty()) {
+        MBGL_CHECK_ERROR(glDeleteTextures(int(abandonedTextures.size()), abandonedTextures.data()));
+        abandonedTextures.clear();
+    }
+
+    if (!abandonedVAOs.empty()) {
+        MBGL_CHECK_ERROR(gl::DeleteVertexArrays(int(abandonedVAOs.size()), abandonedVAOs.data()));
+        abandonedVAOs.clear();
+    }
+
+    if (!abandonedFBOs.empty()) {
+        MBGL_CHECK_ERROR(glDeleteFramebuffers(int(abandonedFBOs.size()), abandonedFBOs.data()));
+        abandonedFBOs.clear();
+    }
+}
+
+} // namespace gl
+} // namespace mbgl