1 files changed, 39 insertions, 0 deletions
diff --git a/src/mbgl/renderer/painter_clipping.cpp b/src/mbgl/renderer/painter_clipping.cpp
new file mode 100644
index 0000000000..dc625ded4e
--- /dev/null
+++ b/src/mbgl/renderer/painter_clipping.cpp
@@ -0,0 +1,39 @@
+#include <mbgl/renderer/painter.hpp>
+#include <mbgl/renderer/fill_bucket.hpp>
+#include <mbgl/map/map.hpp>
+#include <mbgl/map/source.hpp>
+#include <mbgl/util/clip_ids.hpp>
+
+using namespace mbgl;
+
+void Painter::drawClippingMasks(const std::set<util::ptr<StyleSource>> &sources) {
+    gl::group group("clipping masks");
+
+    useProgram(plainShader->program);
+    glDisable(GL_DEPTH_TEST);
+    depthMask(false);
+    glColorMask(false, false, false, false);
+    depthRange(1.0f, 1.0f);
+
+    coveringPlainArray.bind(*plainShader, tileStencilBuffer, BUFFER_OFFSET(0));
+
+    for (const util::ptr<StyleSource> &source : sources) {
+        source->source->drawClippingMasks(*this);
+    }
+
+    glEnable(GL_DEPTH_TEST);
+    glColorMask(true, true, true, true);
+    depthMask(true);
+    glStencilMask(0x0);
+}
+
+void Painter::drawClippingMask(const mat4& matrix, const ClipID &clip) {
+    plainShader->u_matrix = matrix;
+
+    const GLint ref = (GLint)(clip.reference.to_ulong());
+    const GLuint mask = (GLuint)(clip.mask.to_ulong());
+    glStencilFunc(GL_ALWAYS, ref, mask);
+    glStencilMask(mask);
+
+    glDrawArrays(GL_TRIANGLES, 0, (GLsizei)tileStencilBuffer.index());
+}