1 files changed, 54 insertions, 0 deletions
diff --git a/src/mbgl/gl/texture.cpp b/src/mbgl/gl/texture.cpp
new file mode 100644
index 0000000000..2b41e7ae8e
--- /dev/null
+++ b/src/mbgl/gl/texture.cpp
@@ -0,0 +1,54 @@
+#include <mbgl/gl/texture.hpp>
+#include <mbgl/gl/context.hpp>
+#include <mbgl/gl/texture_resource.hpp>
+#include <mbgl/gl/defines.hpp>
+
+namespace mbgl {
+namespace gl {
+
+using namespace platform;
+
+void bindTexture(gl::Context& context, const uint8_t unit, const gfx::TextureBinding& binding) {
+    auto& resource = reinterpret_cast<gl::TextureResource&>(*binding.resource);
+    if (binding.filter != resource.filter || binding.mipmap != resource.mipmap ||
+        binding.wrapX != resource.wrapX || binding.wrapY != resource.wrapY) {
+        context.activeTextureUnit = unit;
+        context.texture[unit] = resource.texture;
+
+        if (binding.filter != resource.filter || binding.mipmap != resource.mipmap) {
+            MBGL_CHECK_ERROR(glTexParameteri(
+                GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
+                binding.filter == gfx::TextureFilterType::Linear
+                    ? (binding.mipmap == gfx::TextureMipMapType::Yes ? GL_LINEAR_MIPMAP_NEAREST
+                                                                     : GL_LINEAR)
+                    : (binding.mipmap == gfx::TextureMipMapType::Yes ? GL_NEAREST_MIPMAP_NEAREST
+                                                                     : GL_NEAREST)));
+            MBGL_CHECK_ERROR(glTexParameteri(
+                GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
+                binding.filter == gfx::TextureFilterType::Linear ? GL_LINEAR : GL_NEAREST));
+            resource.filter = binding.filter;
+            resource.mipmap = binding.mipmap;
+        }
+        if (binding.wrapX != resource.wrapX) {
+
+            MBGL_CHECK_ERROR(glTexParameteri(
+                GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
+                binding.wrapX == gfx::TextureWrapType::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
+            resource.wrapX = binding.wrapX;
+        }
+        if (binding.wrapY != resource.wrapY) {
+            MBGL_CHECK_ERROR(glTexParameteri(
+                GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
+                binding.wrapY == gfx::TextureWrapType::Clamp ? GL_CLAMP_TO_EDGE : GL_REPEAT));
+            resource.wrapY = binding.wrapY;
+        }
+    } else if (context.texture[unit] != resource.texture) {
+        // We are checking first to avoid setting the active texture without a subsequent
+        // texture bind.
+        context.activeTextureUnit = unit;
+        context.texture[unit] = resource.texture;
+    }
+}
+
+} // namespace gl
+} // namespace mbgl